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2011年
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第 1 条,共 209 条
标题: Broadband near-infrared emission in Tm3+-Dy3+ codoped amorphous chalcohalide films fabricated by pulsed laser deposition
作者: Yang, SL (Yang, Senlin); Wang, XF (Wang, Xuefeng); Guo, HT (Guo, Haitao); Dong, GP (Dong, Guoping); Peng, B (Peng, Bo); Qiu, JR (Qiu, Jianrong); Zhang, R (Zhang, Rong); Shi, Y (Shi, Yi)
来源出版物: OPTICS EXPRESS  卷: 19  期: 27  页: 26529-26535  DOI: 10.1364/OE.19.026529  出版年: DEC 19 2011 
Web of Science 核心合集中的 "被引频次": 8
被引频次合计: 8
摘要: Structural and near-infrared (NIR) emission properties were investigated in the Tm3+-Dy3+ codoped Ge-Ga-based amorphous chalcohalide films fabricated by pulsed laser deposition. The homogeneous films illustrated similar random network to the glass target according to the measurements of X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. An 808 nm laser diode pumping generated a superbroadband NIR emission ranging from 1050 to 1570 nm and the other intense broadband NIR emission centered at similar to 1800 nm, which was attributed to the efficient energy transfer from Tm3+ to Dy3+ ions. This was further verified by the broad-range excitation measurements near the Urbach optical-absorption edge involved defect states. The results shed light on the potential highly integrated planar optical device applications of the codoped amorphous chalcohalide films. (C) 2011 Optical Society of America
PubMed ID: 22274237
文献类型: Article
KeyWords Plus: OPTICAL AMPLIFICATION; CHALCOGENIDE GLASSES; MU-M; SPECTROSCOPIC PROPERTIES; SPUTTERED FILMS; IR EMISSION; BISMUTH; LUMINESCENCE; EXCITATION; PHOTOLUMINESCENCE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 903WB
ISSN: 1094-4087
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第 2 条,共 209 条
标题: Reflective point-diffraction microscopic interferometer with long-term stability
作者: Guo, RL (Guo, Rongli); Yao, BL (Yao, Baoli); Gao, P (Gao, Peng); Min, JW (Min, Junwei); Zheng, JJ (Zheng, Juanjuan); Ye, T (Ye, Tong)
来源出版物: CHINESE OPTICS LETTERS  卷: 9  期: 12  文献号: 120002  DOI: 10.3788/COL201109.120002  出版年: DEC 10 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: An on-axis phase-shifting reflective point-diffraction microscopic interferometer for quantitative phase microscopy based on Michelson architecture is proposed. A cube beamsplitter splits the object wave spectrum into two copies within two arms. Reference wave is rebuilt in one arm by low-pass filtering on the object wave frequency spectrum with a pinhole-mask mirror, and interferes with the object wave from the other arm. Polarization phase-shifting is performed and phase imaging on microscale specimens is implemented. The experimental results demonstrate that the proposed scheme has the advantage of long-term stability due to its quasi common-path geometry with full use of laser energy.
文献类型: Article
KeyWords Plus: DIGITAL HOLOGRAPHIC MICROSCOPY; PHASE MICROSCOPY; COMMON-PATH; CONTRAST; POLARIZATION; DYNAMICS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 865WN
ISSN: 1671-7694
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第 3 条,共 209 条
标题: Two-dimensional sub-half-wavelength atom localization via controlled spontaneous emission
作者: Wan, RG (Wan, Ren-Gang); Zhang, TY (Zhang, Tong-Yi)
来源出版物: OPTICS EXPRESS  卷: 19  期: 25  页: 25823-25832  DOI: 10.1364/OE.19.025823  出版年: DEC 5 2011 
Web of Science 核心合集中的 "被引频次": 13
被引频次合计: 14
摘要: We propose a scheme for two-dimensional (2D) atom localization based on the controlled spontaneous emission, in which the atom interacts with two orthogonal standing-wave fields. Due to the spatially dependent atom-field interaction, the position probability distribution of the atom can be directly determined by measuring the resulting spontaneously emission spectrum. The phase sensitive property of the atomic system leads to quenching of the spontaneous emission in some regions of the standing-waves, which significantly reduces the uncertainty in the position measurement of the atom. We find that the frequency measurement of the emitted light localizes the atom in half-wavelength domain. Especially the probability of finding the atom at a particular position can reach 100% when a photon with certain frequency is detected. By increasing the Rabi frequencies of the driving fields, such 2D sub-half-wavelength atom localization can acquire high spatial resolution. (C) 2011 Optical Society of America
PubMed ID: 22273975
文献类型: Article
KeyWords Plus: DOUBLE-DARK RESONANCES; TRIPOD SYSTEM
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 857FN
ISSN: 1094-4087
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第 4 条,共 209 条
标题: Growth of short-period InAs/GaSb superlattices for infrared sensing
作者: Wang, T (Wang Tao); Yang, J (Yang Jin); Yin, F (Yin Fei); Wang, JW (Wang Jing-Wei); Hu, YN (Hu Ya-Nan); Zhang, LC (Zhang Li-Chen); Yin, JZ (Yin Jing-Zhi)
来源出版物: JOURNAL OF INFRARED AND MILLIMETER WAVES  卷: 30  期: 6  页: 511-+  出版年: DEC 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The InAs/GaSb superlattice were prepared by metal organic chemical vapor deposition (MOCVD) on GaSb substrate. The optimized thickness and the various growth parameters were explored as well as the importance of source flux control. The photoluminescence (PL) spectra, x-ray diffraction data (XRD) and the surface topography map showed that the superlattice can response to incident light with long wavelength of 10 mu m, and has good surface morphology and epitaxial layer quality.
文献类型: Article
作者关键词: InAs/GaSb superlattice; band gap; metal organic chemical vapor deposition (MOCVD); atomic force microscope(AFM); PL spectra
KeyWords Plus: OPTICAL CHARACTERIZATION; GASB
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 868UF
ISSN: 1001-9014
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第 5 条,共 209 条
标题: Low-repetition-rate ytterbium-doped fiber laser based on a CFBG from large anomalous to large normal dispersion
作者: Li, XH (Li, X. H.); Wang, YS (Wang, Y. S.); Zhang, W (Zhang, W.); Zhao, W (Zhao, W.); Hu, XH (Hu, X. H.); Yang, Z (Yang, Z.); Gao, CX (Gao, C. X.); Wang, XL (Wang, X. L.); Liu, XL (Liu, X. L.); Shen, DY (Shen, D. Y.); Li, C (Li, C.)
来源出版物: LASER PHYSICS  卷: 21  期: 12  页: 2112-2117  DOI: 10.1134/S1054660X11210110  出版年: DEC 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: We report on the long-cavity ytterbium-doped fiber laser based on a chirped fiber Bragg grating (CFBG) to control the dispersion in the cavity. The proposed fiber lasers operating in large anomalous dispersion and large normal dispersion are intensively studied in this paper. To the best of our knowledge, this is the first time for us to give the dispersion map over such a wide range. The experimental results show that, for large anomalous dispersion, the state of soliton rains can be obtained. Nanosecond pulse is obtained in the large normal dispersion regime with spectral filter which is different from the operation mode without spectral filter. This study may pave the way to best apply the fiber laser in many fields.
文献类型: Article
KeyWords Plus: ALL-FIBER; CAVITY DISPERSION; RING LASERS; MODE; PULSE; SOLITONS; SYSTEM
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 857QI
ISSN: 1054-660X
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第 6 条,共 209 条
标题: High power tunable picosecond green laser pulse generation by frequency doubling of an Yb-doped fiber power amplifier seeded by a gain switch laser diode
作者: Liu, HJ (Liu, H. J.); Li, XF (Li, X. F.)
来源出版物: LASER PHYSICS  卷: 21  期: 12  页: 2118-2121  DOI: 10.1134/S1054660X11210146  出版年: DEC 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: A compact tunable high power picosecond green laser pulse source based on frequency doubling of an Yb-doped fiber amplifier seeded by a gain switch laser diode has been developed. The fiber amplifier generates the picosecond infrared pulses with average power of 10.3 W, repetition rate of 1 MHz, pulse duration of 150 ps, and tunable range of 20 nm around 1064 nm. For underwater use, the tunable output infrared pulses are frequency doubled into picosecond green laser pulses, which can be tuned from 527 to 537 nm with average power of more than 1.1 W, corresponding to an overall conversion efficiency of 10.7% by a BBO nonlinear crystal. This kind of laser source will have potential application for underwater optical communication.
文献类型: Article
KeyWords Plus: HIGH-AVERAGE-POWER; REPETITION-RATE; SATURABLE ABSORBER; 515 NM; OUTPUT
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 857QI
ISSN: 1054-660X
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第 7 条,共 209 条
标题: Exploiting Local Coherent Patterns for Unsupervised Feature Ranking
作者: Huang, QH (Huang, Qinghua); Tao, DC (Tao, Dacheng); Li, XL (Li, Xuelong); Jin, LW (Jin, Lianwen); Wei, G (Wei, Gang)
来源出版物: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS  卷: 41  期: 6  页: 1471-1482  DOI: 10.1109/TSMCB.2011.2151256  出版年: DEC 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 4
摘要: Prior to pattern recognition, feature selection is often used to identify relevant features and discard irrelevant ones for obtaining improved analysis results. In this paper, we aim to develop an unsupervised feature ranking algorithm that evaluates features using discovered local coherent patterns, which are known as biclusters. The biclusters (viewed as submatrices) are discovered from a data matrix. These submatrices are used for scoring relevant features from two aspects, i.e., the interdependence of features and the separability of instances. The features are thereby ranked with respect to their accumulated scores from the total discovered biclusters before the pattern classification. Experimental results show that this proposed method can yield comparable or even better performance in comparison with the well-known Fisher score, Laplacian score, and variance score using three UCI data sets, well improve the results of gene expression data analysis using gene ontology annotation, and finally demonstrate its advantage of unsupervised feature ranking for high-dimensional data.
文献类型: Article
作者关键词: Bicluster score; feature selection; unsupervised learning
KeyWords Plus: FEATURE SUBSET-SELECTION; CLASSIFICATION; DISCRIMINANT; ALGORITHMS
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics
研究方向: Automation & Control Systems; Computer Science
IDS 号: 852FV
ISSN: 1083-4419
________________________________________
第 8 条,共 209 条
标题: Enhanced Biologically Inspired Model for Object Recognition
作者: Huang, YZ (Huang, Yongzhen); Huang, KQ (Huang, Kaiqi); Tao, DC (Tao, Dacheng); Tan, TN (Tan, Tieniu); Li, XL (Li, Xuelong)
来源出版物: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS  卷: 41  期: 6  页: 1668-1680  DOI: 10.1109/TSMCB.2011.2158418  出版年: DEC 2011 
Web of Science 核心合集中的 "被引频次": 15
被引频次合计: 18
摘要: The biologically inspired model (BIM) proposed by Serre et al. presents a promising solution to object categorization. It emulates the process of object recognition in primates' visual cortex by constructing a set of scale- and position-tolerant features whose properties are similar to those of the cells along the ventral stream of visual cortex. However, BIM has potential to be further improved in two aspects: mismatch by dense input and randomly feature selection due to the feedforward framework. To solve or alleviate these limitations, we develop an enhanced BIM (EBIM) in terms of the following two aspects: 1) removing uninformative inputs by imposing sparsity constraints, 2) apply a feedback loop to middle level feature selection. Each aspect is motivated by relevant psychophysical research findings. To show the effectiveness of the EBIM, we apply it to object categorization and conduct empirical studies on four computer vision data sets. Experimental results demonstrate that the EBIM outperforms the BIM and is comparable to state-of-the-art approaches in terms of accuracy. Moreover, the new system is about 20 times faster than the BIM.
文献类型: Article
作者关键词: Biologically inspired model (BIM); feedback; object recognition; sparseness
KeyWords Plus: VISUAL-SYSTEM; CORTEX; RETRIEVAL; FEATURES; SCALE; CLASSIFICATION; SURVEILLANCE; HISTOGRAMS; REGIONS; SPEED
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics
研究方向: Automation & Control Systems; Computer Science
IDS 号: 852FV
ISSN: 1083-4419
________________________________________
第 9 条,共 209 条
标题: Shadow Detection in Remotely Sensed Images Based on Self-Adaptive Feature Selection
作者: Liu, JH (Liu, Jiahang); Fang, T (Fang, Tao); Li, DR (Li, Deren)
来源出版物: IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING  卷: 49  期: 12  页: 5092-5103  DOI: 10.1109/TGRS.2011.2158221  子辑: 2  出版年: DEC 2011 
Web of Science 核心合集中的 "被引频次": 6
被引频次合计: 9
摘要: Shadows in remotely sensed images create difficulties in many applications; thus, they should be effectively detected prior to further processing. This paper presents a novel semiautomatic shadow detection method that meets the requirements of both high accuracy and wide practicability in remote sensing applications. The proposed method uses only the properties derived from the shadow samples to dynamically generate a feature space and calculate decision parameters; then, it employs a series of transformations to separate shadow and nonshadow regions. The proposed method can detect shadows from both color and gray images. If the chromatic properties of color images do not agree with the defined rules through the shadow samples, then the shadow detection process will automatically reduce to the process for gray images. As the shadow samples are manually selected from the input image by the user, the derived parameters conform well to the characteristics of the input image. Experiments and comparisons indicate that the proposed self-adaptive feature selection algorithm is accurate, effective, and widely applicable to shadow detection in practical applications.
文献类型: Article
作者关键词: Chromatic information; image analysis; image segmentation; remotely sensed image; self-adaptive feature selection (SAFS); shadow detection; shadow property
KeyWords Plus: COLOR AERIAL IMAGES; BUILDINGS
Web of Science 类别: Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology
研究方向: Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology
IDS 号: 851PC
ISSN: 0196-2892
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第 10 条,共 209 条
标题: Design of Topas microstructured fiber with ultra-flattened chromatic dispersion and high birefringence
作者: Wang, DD (Wang, Doudou); Wang, LL (Wang, Lili)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 24  页: 5568-5571  DOI: 10.1016/j.optcom.2011.08.040  出版年: DEC 1 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: A microstructured polymer optical fiber (mPOF) with both ultra-flattened near-zero chromatic dispersion and high birefringence based on Topas cyclic olefin copolymer is designed. Three rings of uniform elliptical air holes are arranged in triangular lattice in the cladding and an extra small defected hole is introduced in the fiber core. Guided modes, dispersion, birefringence and mode confinement properties of the designed mPOF are investigated by using the full-vector finite element method. Dispersion values between +/- 0.5 ps/km/nm over the wavelength 1.1-1.7 mu m and high birefringence of the order of 10(-3) are obtained for the optimized fiber structure. Low confinement losses and small effective mode area are obtained at the same time. The relatively simple architecture of the proposed Topas mPOF can be fabricated by our extrusion-stretching techniques. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Microstructured polymer optical fiber; Dispersion; Birefringence; Topas COC
KeyWords Plus: POLYMER OPTICAL-FIBER; PHOTONIC CRYSTAL FIBERS; FABRICATION; PREFORMS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 843QK
ISSN: 0030-4018
________________________________________
第 11 条,共 209 条
标题: Spectrum reshaping of amplified pulse in silicon nanowaveguide
作者: Wu, JW (Wu, Jian-Wei); Sarma, AK (Sarma, Amarendra K.); Zhang, XP (Zhang, Xu-Ping)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 24  页: 5641-5644  DOI: 10.1016/j.optcom.2011.08.010  出版年: DEC 1 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: A device consisting of a cascaded semiconductor optical amplifier (SOA) and silicon on insulator (SOI) optical waveguide is presented to amplify and reshape the frequency spectrum of optical pulses in the picoseconds time duration. Numerical simulations show that the output spectrum of the amplified pulse by SOA can be effectively reshaped by utilizing the SOI waveguide. The length of the SOI waveguide may be judiciously adjusted to significantly reduce the frequency chirp of the output pulse from the SOA resulting in reshaping of the output spectrum. We find that the property of pulse spectrum is sensitive to the input pulse power and its temporal width. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Integrated optics; Ultrafast process; Optical pulse generation and pulse compression; Nonlinear waveguide
KeyWords Plus: SEMICONDUCTOR OPTICAL AMPLIFIERS; SELF-PHASE MODULATION; WAVE-GUIDES; WAVELENGTH CONVERSION; LASER; AMPLIFICATION; GATE; SOA
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 843QK
ISSN: 0030-4018
________________________________________
第 12 条,共 209 条
标题: Impact of dispersion profiles of silicon waveguides on optical parametric amplification in the femtosecond regime
作者: Wang, ZL (Wang, Zhaolu); Liu, HJ (Liu, Hongjun); Huang, N (Huang, Nan); Sun, QB (Sun, Qibing); Wen, J (Wen, Jin)
来源出版物: OPTICS EXPRESS  卷: 19  期: 24  页: 24730-24737  DOI: 10.1364/OE.19.024730  出版年: NOV 21 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 4
摘要: The impact of dispersion profiles of silicon waveguides on femtosecond optical parametric amplification (OPA) is theoretically investigated. It is found that flat quasi-phase-matching, smooth temporal profiles and separable spectra for 200 fs pulses can be obtained by tailoring the cross-section of silicon rib waveguide. We achieve on-chip parametric gain as high as 26.8 dB and idler conversion gain of 25.6 dB for a low pump peak power over a flat bandwidth of 400 nm in a 10-mm-long dispersion engineered silicon waveguide. Our on-chip OPA can find important potential applications in highly integrated optical circuits for all-optical ultrafast signal processing. (C) 2011 Optical Society of America
PubMed ID: 22109500
文献类型: Article
KeyWords Plus: SELF-PHASE MODULATION; NONLINEAR POLARIZATION ROTATION; MU-M WAVELENGTH; 2-PHOTON ABSORPTION; CONVERSION; GENERATION; PULSES; GAIN
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 865PE
ISSN: 1094-4087
________________________________________
第 13 条,共 209 条
标题: Interaction and motion of solitons in passively- mode-locked fiber lasers
作者: Liu, XM (Liu, Xueming)
来源出版物: PHYSICAL REVIEW A  卷: 84  期: 5  文献号: 053828  DOI: 10.1103/PhysRevA.84.053828  出版年: NOV 14 2011 
Web of Science 核心合集中的 "被引频次": 32
被引频次合计: 34
摘要: Interaction and motion of multiple solitons in passively-mode-locked (PML) fiber lasers are investigated numerically. Three types of relative motions of two solitons are found in PML fiber lasers. The numerical results show that the relative motion of solitons attributes to the phase shift, which corresponds to the instantaneous frequency at pulse peak to be nonzero. Different from the classical dynamics of billiard balls, the interaction of solitons is similar to the Feynman diagram which is a pictorial way to represent the interaction of particles. After solitons interact with one another, their shapes do not change, but their phases shift and relative motions change. The theoretical results demonstrate that the separation of neighboring solitons in the laser cavity is about several hundred picoseconds to several nanoseconds. The theoretical predictions are in good agreement with the experimental results.
文献类型: Article
KeyWords Plus: DISPERSION
Web of Science 类别: Optics; Physics, Atomic, Molecular & Chemical
研究方向: Optics; Physics
IDS 号: 848ZV
ISSN: 1050-2947
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第 14 条,共 209 条
标题: Broadband terahertz spectroscopy
作者: Fan, WH (Fan, Wenhui)
来源出版物: CHINESE OPTICS LETTERS  卷: 9  期: 11  特刊: SI  文献号: 110008  DOI: 10.3788/COL201109.110008  出版年: NOV 10 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 4
摘要: An overview of the major techniques to generate and detect THz radiation so far, especially the major approaches to generate and detect coherent ultra-short THz pulses using ultra-short pulsed laser, has been presented. And also, this paper, in particularly, focuses on broadband THz spectroscopy and addresses on a number of issues relevant to generation and detection of broadband pulsed THz radiation as well as broadband time-domain THz spectroscopy (THz-TDS) with the help of ultra-short pulsed laser. The time-domain waveforms of coherent ultra-short THz pulses from photoconductive antenna excited by femtosecond laser with different pulse durations and their corresponding Fourier-transformed spectra have been obtained via the numerical simulation of ultrafast dynamics between femtosecond laser pulse and photoconductive material. The origins of fringes modulated on the top of broadband amplitude spectrum, which is measured by electric-optic detector based on thin nonlinear crystal and extracted by fast Fourier transformation, have been analyzed and the major solutions to get rid of these fringes are discussed.
文献类型: Article
KeyWords Plus: TIME-DOMAIN SPECTROSCOPY; COHERENT MANIPULATION; CHEMICAL RECOGNITION; DOPED SILICON; GENERATION; LASER; RADIATION; THZ; EXPLOSIVES; EXCITATION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 846JR
ISSN: 1671-7694
________________________________________
第 15 条,共 209 条
标题: Non-absorption grating approach for X-ray phase contrast imaging
作者: Du, Y (Du, Yang); Liu, X (Liu, Xin); Lei, YH (Lei, Yaohu); Guo, JC (Guo, Jinchuan); Niu, HB (Niu, Hanben)
来源出版物: OPTICS EXPRESS  卷: 19  期: 23  页: 22669-22674  DOI: 10.1364/OE.19.022669  出版年: NOV 7 2011 
Web of Science 核心合集中的 "被引频次": 14
被引频次合计: 14
摘要: we demonstrate a non-absorption grating approach for X-ray phase contrast imaging based-on grating interferometry. This technique overcomes the limitations imposed by absorption gratings, provides another choice for X-ray phase contrast imaging and potentially improves the image quality for higher X-ray photon energies. We constructed the key devices, established the system and obtained phase contrast images with a field of view larger than 5 centimeters, which is the limitation imposed by the size of our current CCD detector. This method has no need for absorption gratings, which represents a significant development for future promising applications in medicine and industry. (C)2011 Optical Society of America
PubMed ID: 22109147
文献类型: Article
KeyWords Plus: INTERFEROMETER; FABRICATION; TOMOGRAPHY
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 846LW
ISSN: 1094-4087
________________________________________
第 16 条,共 209 条
标题: Nonequilibrium Plasmas Generated by Dielectric Barrier Discharges at Atmospheric Pressure
作者: Tang, J (Tang, Jie); Zhao, W (Zhao, Wei); Duan, JN (Duan, Jiana); Duan, YX (Duan, Yixiang)
来源出版物: IEEE TRANSACTIONS ON PLASMA SCIENCE  卷: 39  期: 11  特刊: SI  页: 2080-2081  DOI: 10.1109/TPS.2011.2159126  子辑: 1  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Both propane plasma and air plasma are successfully generated at atmospheric pressure by using two dielectric barrier discharge reactors with different configurations, in which one is used to activate propane and the other is used to activate air. The plasma pictures show that the microdischarge channels in the plasmas increase and become increasingly more uniform with the deposited power under both activation methods. It is found that the propane plasma is of an ivory white color, while the air plasma is purple, as a result of the different gas components. A 30-W propane or air plasma leads to a significant temperature rise of the main flame, attributed to the production of reactive radicals and fuel fragments in such plasmas.
文献类型: Article
作者关键词: Atmospheric pressure; dielectric barrier discharge (DBD); microdischarge channel; nonthermal plasma
Web of Science 类别: Physics, Fluids & Plasmas
研究方向: Physics
IDS 号: 884CV
ISSN: 0093-3813
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第 17 条,共 209 条
标题: Low-Temperature Brush-Shaped Large-Volume Plasma Generated by Direct Current Discharge at Atmospheric Pressure
作者: Sun, AM (Sun, Aimin); Tang, J (Tang, Jie); Cao, WQ (Cao, Wenqing); Zhao, W (Zhao, Wei); Duan, YX (Duan, Yixiang)
来源出版物: IEEE TRANSACTIONS ON PLASMA SCIENCE  卷: 39  期: 11  特刊: SI  页: 2084-2085  DOI: 10.1109/TPS.2011.2132742  子辑: 1  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Low-temperature plasma is generated by glow discharge with a high direct current power supply and argon gas. A brush-shaped plasma source with large volume is obtained with a width of 15 mm, a thickness of 1 mm, and a length of about 18 mm. The source design and mechanism of the plasma generation are presented and discussed. The large-volume plasma source provides advantages in surface treatment, such as high working efficiency, sufficient utilization of the plasma gas, and natural cooling down. The characteristics of large volume, high energy density, and low temperature allow this kind of plasma source to be more suitable to practical applications.
文献类型: Article
作者关键词: Atmospheric pressure; direct current; glow discharge; low-temperature plasma
KeyWords Plus: CURRENT GLOW-DISCHARGES
Web of Science 类别: Physics, Fluids & Plasmas
研究方向: Physics
IDS 号: 884CV
ISSN: 0093-3813
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第 18 条,共 209 条
标题: Multi-wavelength ultraviolet terawatt-order CPA system
作者: Ling, WJ (Ling Wei-Jun); Zhang, SG (Zhang Shao-Gang); Li, K (Li Ke); Zhang, MX (Zhang Ming-Xia); Wang, YS (Wang Yi-Shan); Zhao, W (Zhao Wei); Wang, ZH (Wang Zhao-Hua); Wei, ZY (Wei Zhi-Yi)
来源出版物: ACTA PHYSICA SINICA  卷: 60  期: 11  文献号: 114215  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We set up a multi-wavelength ultraviolet terawatt-order chirped pulse amplification (CPA) system according to the CPA technology and the frequency conversion technology. The system offers 1Hz, 5Hz and 10Hz high energy ultraviolet pulses by precise time synchronization among 5 repeat frequencies. The RMS of output energy fluctuation rate of CPA is less than 2% with using a pre-amplified system of energy fluctuation rate less than 0.3% RMS and a time synchronizer with time jitter less than 3 ns. The multi-wavelength high energy ultraviolet pulses with 64 mJ/400 nm,16 mJ/267 nm and 5 mJ/205 nm are obtained, and their corresponding peak powers reach the terawatt level.
文献类型: Article
作者关键词: chirped pulse amplification (CPA); optical frequency conversion; ultraviolet pulse
KeyWords Plus: TI-SAPPHIRE LASER; 2ND-HARMONIC GENERATION; CUBIC NONLINEARITY; PULSES
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 867GE
ISSN: 1000-3290
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第 19 条,共 209 条
标题: Femtosecond electron pulse compression by using the time focusing technique in ultrafast electron diffraction
作者: Wen, WL (Wen Wen-Long); Lei, XH (Lei Xiao-Hong); Hu, X (Hu Xin); Xu, XY (Xu Xiang-Yan); Wang, JF (Wang Jun-Feng); Cao, XB (Cao Xi-Bin); Liu, HL (Liu Hu-Lin); Wang, C (Wang Chao); Dang, LH (Dang Li-Hong); Tian, JS (Tian Jin-Shou)
来源出版物: CHINESE PHYSICS B  卷: 20  期: 11  文献号: 114102  DOI: 10.1088/1674-1056/20/11/114102  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We present a new model of an electron gun for generating subrelativistic femtosecond (fs) electron pulses. The basic idea is to utilize a dc acceleration stage combined with a time focusing region, the time focusing electrode generates an electron energy chirp for bunching at the target. Without considering the space charge effects, simulations of the electron gun were carried out under the conditions of different dc voltages and various slopes of the voltage added on the time focusing electrode. Tracing and simulating large numbers of photoelectrons through Monte-Carlo and finite difference methods, the electron pulses with 1 ps can be compressed to 55 fs, which will allow significant advances in the field of ultrafast diagnosis.
文献类型: Article
作者关键词: time focusing technique; temporal pulse compressing; time-dependent electric field; Monte-Carlo method
KeyWords Plus: RESOLUTION; MICROSCOPY
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 867YW
ISSN: 1674-1056
________________________________________
第 20 条,共 209 条
标题: Dispersion-Insensitive Low-Coherent Pulses Emerging from Nonlinear Polarization Switching
作者: Mao, D (Mao, D.); Liu, XM (Liu, X. M.); Lu, H (Lu, H.); Wang, LR (Wang, L. R.); Duan, LN (Duan, L. N.)
来源出版物: LASER PHYSICS  卷: 21  期: 11  页: 1903-1908  DOI: 10.1134/S1054660X11190236  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We have experimentally investigated low-repetition nanosecond pulses delivered from an erbium-doped fiber (EDF) laser operating in ultra-large anomalous dispersion regime. The output pulses with rectangular profile and Gaussian spectrum almost keep invariable when they propagate through either normal- or anomalous-dispersion fibers. After nanosecond pulses are amplified via a two-stage EDF amplifier, they are broken up and exhibited as flatly broadened supercontinuum from 1520 to 1700 nm if amplified pulses are launched into a 10-km single-mode fiber, whereas the pulses retain the same duration with a broadband supercontinuum from 1200 to 1750 nm if they are input into a 100-m highly-nonlinear low-dispersion photonic-crystal fiber (PCF). The experimental observations demonstrate that the nanosecond pulses result from nonlinear polarization switching and can be regarded as dispersion-insensitive low-coherent pulses rather than compressible pulses.
文献类型: Article
KeyWords Plus: LOCKED FIBER LASER; PHOTONIC CRYSTAL FIBER; LOW REPETITION RATE; SUPERCONTINUUM GENERATION; ANOMALOUS-DISPERSION; MODE-LOCKING; RING LASER; ENERGY; CAVITY; SOLITONS
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 857QE
ISSN: 1054-660X
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第 21 条,共 209 条
标题: Generation of 10-GHz Duty-Cycle Tunable Square Optical Pulse in an SOA-Based Mode-Locked Fiber Laser
作者: Luo, D (Luo, D.); Yan, SY (Yan, S. Y.); Xie, XP (Xie, X. P.); Zhao, W (Zhao, W.)
来源出版物: LASER PHYSICS  卷: 21  期: 11  页: 1909-1913  DOI: 10.1134/S1054660X11190224  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: We demonstrate the generation of 10-GHz optical square pulses by injecting a picosecond pulse train into an SOA-based mode-locked fiber laser. The novel scheme exploits nonlinear effects and gain saturation phenomenon in the semiconductor optical amplifier (SOA). This technique uses gain-compression dynamics between the input pulses and the generated ones in gain-saturated SOA to form square pulses. The center wavelength of the generated optical square pulse can be tuned from 1530 to 1570 nm by adjusting the center wavelength of the optical band pass filter (OBPF) in the SOA-based mode-locked fiber ring laser. The duty cycle of the output pulse can be tuned from 12.7 to 88.4%, which strongly depends on the input power and intra-cavity power.
文献类型: Article
KeyWords Plus: CROSS-GAIN COMPRESSION; NORMAL-DISPERSION; AMPLIFIERS; CAVITY; POLARIZATION; OPERATION; OUTPUT
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 857QE
ISSN: 1054-660X
________________________________________
第 22 条,共 209 条
标题: Helium-Implanted Optical Planar Waveguides in Nd3+-Doped Phosphate Glass
作者: Liu, CX (Liu Chun-Xiao); Liu, T (Liu Tao); Liu, XH (Liu Xiu-Hong); Wei, W (Wei Wei); Peng, B (Peng Bo)
来源出版物: CHINESE PHYSICS LETTERS  卷: 28  期: 11  文献号: 114205  DOI: 10.1088/0256-307X/28/11/114205  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 6
被引频次合计: 8
摘要: We report the fabrication of planar waveguides in Nd3+-doped phosphate glass by helium ion implantation. The guiding properties of the waveguide are evaluated by a prism coupler and end-face coupling methods. The refractive index profile of the waveguide is reconstructed by using the intensity calculation method. Absorption and fluorescence investigations reveal that helium ion implantation causes only slight changes in the optical properties, suggesting the possible application of the fabricated structures as waveguide lasers.
文献类型: Article
KeyWords Plus: REFRACTIVE-INDEX PROFILES; ION-IMPLANTATION; LASER GENERATION; SILICATE GLASS; FABRICATION
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 851PZ
ISSN: 0256-307X
________________________________________
第 23 条,共 209 条
标题: Decoding algorithms of single photon counting imager based on two-dimensional Vernier anodes
作者: Yang, H (Yang Hao); Zhao, BS (Zhao BaoSheng); Yan, QR (Yan QiuRong); Liu, YA (Liu YongAn); Hu, HJ (Hu HuiJun)
来源出版物: SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY  卷: 54  期: 11  页: 1943-1947  DOI: 10.1007/s11433-011-4490-y  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The decoding algorithms of two-dimensional Vernier anodes are deduced theoretically. The precision of decoding and uniqueness of encoding are proved. The influencing factors of detection sensitivity and spatial resolution are discussed. The single photon imaging system is constructed, and the two-dimensional Vernier collector is fabricated. The image of the ultra-weak emission source is reconstructed. The spatial resolution of the system is about 100 mu m.
文献类型: Article
作者关键词: decoding algorithms; photon counting imaging; Vernier collector; influencing factors
KeyWords Plus: MICROCHANNEL PLATES; IMAGING-SYSTEM; DETECTOR; RESOLUTION; EUV
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 852MN
ISSN: 1674-7348
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第 24 条,共 209 条
标题: Wideband slow light with ultralow dispersion in a W1 photonic crystal waveguide
作者: Liang, J (Liang, Jian); Ren, LY (Ren, Li-Yong); Yun, MJ (Yun, Mao-Jin); Wang, XJ (Wang, Xing-Jun)
来源出版物: APPLIED OPTICS  卷: 50  期: 31  页: G98-G103  DOI: 10.1364/AO.50.000G98  出版年: NOV 1 2011 
Web of Science 核心合集中的 "被引频次": 9
被引频次合计: 9
摘要: A dispersion tailoring scheme for obtaining slow light in a silicon-on-insulator W1-type photonic crystal waveguide, novel to our knowledge, is proposed in this paper. It is shown that, by simply shifting the first two rows of air holes adjacent to the waveguide to specific directions, slow light with large group-index, wideband, and low group-velocity dispersion can be realized. Defining a criterion of restricting the group-index variation within a +/- 0: 8% range as a flattened region, we obtain the ultraflat slow light with bandwidths over 5.0, 4.0, 2.5, and 1.0nm when keeping the group index at 38.0, 48.8, 65.2, and 100.4, respectively. Numerical simulations are performed utilizing the three-dimensional (3D) plane-wave expansion method and the 3D finite-difference time-domain method. (C) 2011 Optical Society of America
PubMed ID: 22086056
文献类型: Article
KeyWords Plus: MAXWELLS EQUATIONS; GROUP-VELOCITY; PROPAGATION; MEDIA
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 849YY
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 25 条,共 209 条
标题: Theoretical study of all-optical RZ to NRZ format conversion based on cascaded nanoporous silicon waveguides
作者: Wu, JW (Wu, Jian-Wei)
来源出版物: INFRARED PHYSICS & TECHNOLOGY  卷: 54  期: 6  页: 465-468  DOI: 10.1016/j.infrared.2011.07.011  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, we present that the strong free carrier absorption and short carrier lifetime in nanoporous silicon waveguide can perform effectively the return-to-zero (RZ) to non-return-to zero (NRZ) format conversion. The project presented consisting of two cascaded millimeters long nanoporous silicon waveguides is numerically simulated and investigated at 5 Gbit/s. Numerical results clearly show that the outcome converted signal (NRZ) at the end of proposed device can be effectively optimized (e.g. clearer extinction ratio - ER, higher Q-factor, and lower bit-error rate - BER) by means of suitably choosing the system parameters such as initial RZ peak level and nanoporous silicon waveguide length. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Integrated optics; Nonlinear optics; Nanoporous silicon waveguide; Ultrafast process; Format conversion
KeyWords Plus: CROSS-PHASE MODULATION; SIGNAL; DISPERSION; FIBER
Web of Science 类别: Instruments & Instrumentation; Optics; Physics, Applied
研究方向: Instruments & Instrumentation; Optics; Physics
IDS 号: 850GM
ISSN: 1350-4495
________________________________________
第 26 条,共 209 条
标题: InAs/GaSb superlattices grown by LP-MOCVD for similar to 10 mu m wavelength infrared range
作者: Chang, YC (Chang, Yuchun); Wang, T (Wang, Tao); Yin, F (Yin, Fei); Wang, JW (Wang, Jingwei); Song, ZY (Song, Zhenyu); Wang, YD (Wang, Yiding); Yin, JZ (Yin, Jingzhi)
来源出版物: INFRARED PHYSICS & TECHNOLOGY  卷: 54  期: 6  页: 478-481  DOI: 10.1016/j.infrared.2011.07.009  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A type-II InAs/GaSb superlattice (SL) was grown on Te-doped (1 0 0) GaSb substrate by low pressure metal organic chemical vapor deposition (LP-MOCVD). The samples were obtained at different growth temperatures and with different interface layers. By introducing an InAsSb interface layer between InAs and GaSb, a good surface morphology of the superlattice was achieved when the sample growth temperature was around 500-520 degrees C. The photoluminescence (PL) peak wavelength of the sample was 10.7 mu m at 77 K, with FWHM of similar to 30 meV. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: InAs/GaSb superlattices; InAsSb interface layer; Growth temperature; LP-MOCVD
KeyWords Plus: DETECTORS; MBE
Web of Science 类别: Instruments & Instrumentation; Optics; Physics, Applied
研究方向: Instruments & Instrumentation; Optics; Physics
IDS 号: 850GM
ISSN: 1350-4495
________________________________________
第 27 条,共 209 条
标题: Active optical system for any field angle zoom
作者: Hu, SL (Hu, Shaolei); Zhao, X (Zhao, Xin); Dong, WH (Dong, Weihui); Xie, YJ (Xie, Yongjun)
来源出版物: OPTICAL ENGINEERING  卷: 50  期: 11  文献号: 113001  DOI: 10.1117/1.3654181  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: We have theoretically proposed a new type of active optical zoom system. It can change the magnification of an imaging system at any field angle, namely, it can change the effective focal length at a limited region of interest and simultaneously maintain high resolution. It is comprised of two static aspheric mirrors and two deformable mirrors; furthermore, by changing the curvature of mirrors the focal length can be adjusted from -399 to -558.6 mm. The system reduces the bandwidth of data transmission and may find potential applications in high speed photography. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3654181]
文献类型: Article
作者关键词: any field angle; deformable mirror; active zoom system; optical systems design
KeyWords Plus: MEMBRANE DEFORMABLE MIRROR; FOCUS LIQUID LENS; DESIGN; CAMERAS; CCD
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 847KK
ISSN: 0091-3286
________________________________________
第 28 条,共 209 条
标题: Phase-shifting Zernike phase contrast microscopy for quantitative phase measurement
作者: Gao, P (Gao, Peng); Yao, BL (Yao, Baoli); Harder, I (Harder, Irina); Lindlein, N (Lindlein, Norbert); Torcal-Milla, FJ (Torcal-Milla, Francisco Jose)
来源出版物: OPTICS LETTERS  卷: 36  期: 21  页: 4305-4307  出版年: NOV 1 2011 
Web of Science 核心合集中的 "被引频次": 9
被引频次合计: 11
摘要: Zernike phase contrast microscopy is extended and combined with a phase-shifting mechanism to perform quantitative phase measurements of microscopic objects. Dozens of discrete point light sources on a ring are constructed for illumination. For each point light source, three different levels of point-like phase steps are designed, which are alternatively located along a ring on a silica plate to perform phase retardation on the undiffracted (dc) component of the object waves. These three levels of the phase steps are respectively selected by rotating the silica plate. Thus, quantitative evaluation of phase specimens can be performed via phase-shifting mechanism. The proposed method has low "halo" and "shade-off" effects, low coherent noise level, and high lateral resolution due to the improved illumination scheme. (C) 2011 Optical Society of America
PubMed ID: 22048399
文献类型: Article
KeyWords Plus: COMMON-PATH INTERFEROMETRY; MODULATOR
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 844GC
ISSN: 0146-9592
________________________________________
第 29 条,共 209 条
标题: Real-Time Measurement of Detonation Transient Temperature
作者: Zheng, JK (Zheng Jin-kun); Bai, YL (Bai Yong-lin); Wang, B (Wang Bo); Liu, BY (Liu Bai-yu); Yang, WZ (Yang Wen-zheng); Bai, XH (Bai Xiao-hong); Qin, JJ (Qin Jun-jun); Zhao, JP (Zhao Jun-ping); Gou, YS (Gou Yong-sheng); Liu, H (Liu Hui)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 11  页: 3060-3063  DOI: 10.3964/j.issn.1000-0593(2011)11-3060-04  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: Based on the spectral characteristic of the detonation temperature, the present paper presents a measurement system of transient multi-wavelength pyrometry with the theory of multi-wavelength thermometry. The FPGA was applied as the hardware developing platform and the high-speed linear CCD was utilized. Each module was controlled by FPGA to achieve the process of real-time data acquisition, storage and transmission. Using the multiple regression analysis method, the dynamic spectral waveforms were calculated. The two laser spectral lines, 630 and 532 nm, were used to calibrate the corresponding pixel sequence numbers and the No. 175 and No. 270 were confirmed. In this paper, the halide tungsten light was measured. The results show that the system can sample continuous spectrum signal at several different times; the CCD can stably work with 40 MHz clock and the frame scanning frequency can achieve 73 kHz.
文献类型: Article
作者关键词: Mechanics of explosion; Detonation temperature; FPGA; High-speed linear CCD; Multi-wavelength temperature measurement
KeyWords Plus: THERMOMETRY
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 843RJ
ISSN: 1000-0593
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第 30 条,共 209 条
标题: Preliminary Study of Zinc Ion Sensor with the Function of Imaging
作者: Wang, J (Wang Jian); Wang, LL (Wang Li-li)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 11  页: 3145-3148  DOI: 10.3964/j.issn.1000-0593(2011)11-3145-04  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A zinc ion fluorescence sensor with imaging was fabricated by using 1-(2-Pyridylazo)-2-naphthol and fluorescent reagent of rhodamine B together as the indication which was immobilized on an tip of gradient index lens by base catalyzed sol-gel method. Combined with improved metallographic microscope and laser, the measurement of zinc ion concentration and the view of sample morphology could be realized simultaneously by this system. The sensor has the linear range of zinc ion concentration from 0.1 to 1 mmol . L(-1). Moreover, it has the capabilities of imaging with the whole system's resolution of 18.73 lp . mm(-1). This sensor with the function of imaging has the potential applications in biosensing.
文献类型: Article
作者关键词: Zinc; Fiber sensing; Imaging
KeyWords Plus: OPTICAL SENSOR; ZN2+; PHARMACEUTICALS; DESIGN
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 843RJ
ISSN: 1000-0593
________________________________________
第 31 条,共 209 条
标题: Spatial Domain Display for Interference Image Dataset
作者: Wang, CL (Wang Cai-ling); Li, YS (Li Yu-shan); Liu, XB (Liu Xue-bin); Hu, BL (Hu Bing-liang); Jing, JJ (Jing Juan-juan); Wen, J (Wen Jia)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 11  页: 3158-3162  DOI: 10.3964/j.issn.1000-0593(2011)11-3158-05  出版年: NOV 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The requirements of imaging interferometer visualization is imminent for the user of image interpretation and information extraction. However, the conventional researches on visualization only focus on the spectral image dataset in spectral domain. Hence, the quick show of interference spectral image dataset display is one of the nodes in interference image processing. The conventional visualization of interference dataset chooses classical spectral image dataset display method after Fourier transformation. In the present paper, the problem of quick view of interferometer imager in image domain is addressed and the algorithm is proposed which simplifies the matter. The Fourier transformation is an obstacle since its computation time is very large and the complexion would be even deteriorated with the size of dataset increasing. The algorithm proposed, named interference weighted envelopes, makes the dataset divorced from transformation. The authors choose three interference weighted envelopes respectively based on the Fourier transformation, features of interference data and human visual system. After comparing the proposed with the conventional methods, the results show the huge difference in display time.
文献类型: Article
作者关键词: Interference spectral data; Visualization; True-colour show; Interference weighted envelopes; Dimensionality reduction
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 843RJ
ISSN: 1000-0593
________________________________________
第 32 条,共 209 条
标题: Analysis of birefringent and dispersive properties of photonic crystal fibers
作者: Lu, S (Lu, S.); Li, W (Li, W.); Guo, H (Guo, H.); Lu, M (Lu, M.)
来源出版物: APPLIED OPTICS  卷: 50  期: 30  页: 5798-5802  DOI: 10.1364/AO.50.005798  出版年: OCT 20 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: Two types of high birefringence photonic crystal fiber (PCF) which import four or six big circular air holes near the elliptical-hole are proposed. Their birefringent and dispersive properties are analyzed by full-vector finite-element method (FEM). Numerical analysis demonstrates that importing the big circular hole near the center of elliptical-hole PCFs can achieve a high birefringence. When the ratio (d/Lambda) of diameter to hole spacing is larger than 0.8, the proposed two types of PCF have a larger birefringence than that of sole elliptical air hole ones. When the ratio d/Lambda is equal to 0.95, the birefringences of these two types PCF can be as high as 4.27 x 10(-3) and 5: 09 x 10(-3) at the wavelength of 1.55 mu m, respectively. Besides, PCF with the four big circular air holes has a large negative dispersion at the long wavelength in x-polarized mode, which indicates a potential in single-polarized mode dispersion compensation. (C) 2011 Optical Society of America
PubMed ID: 22015407
文献类型: Article
KeyWords Plus: AIR HOLES; MODE HOLEY; LATTICE; DESIGN; CORE; GUIDANCE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 841ZV
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 33 条,共 209 条
标题: Spatially resolved X-ray spectroscopy using a flat HOPG crystal
作者: Yuan, XH (Yuan, X. H.); Carroll, DC (Carroll, D. C.); Coury, M (Coury, M.); Gray, RJ (Gray, R. J.); Brenner, CM (Brenner, C. M.); Lin, XX (Lin, X. X.); Li, YT (Li, Y. T.); Quinn, MN (Quinn, M. N.); Tresca, O (Tresca, O.); Zielbauer, B (Zielbauer, B.); Neely, D (Neely, D.); McKenna, P (McKenna, P.)
来源出版物: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT  卷: 653  期: 1  页: 145-149  DOI: 10.1016/j.nima.2010.12.147  出版年: OCT 11 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: A novel design of a 1-D imaging X-ray spectrometer is implemented, using a high efficiency HOPG (highly oriented pyrolitic graphite) Bragg crystal and a double-entrance-slit. The double slit provides self-calibration of the imaging magnification. The spatial and spectral resolutions and dispersion are characterised both analytically and by ray tracing simulations. A key feature of this approach is that it enables the X-ray spectrum to be measured over different regions of the plasma source. The application of this instrument is demonstrated in high intensity laser-foil interaction experiments. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Laser plasma interaction; X-ray spectroscopy
KeyWords Plus: PLASMAS; LASER; IONS
Web of Science 类别: Instruments & Instrumentation; Nuclear Science & Technology; Physics, Particles & Fields; Spectroscopy
研究方向: Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
IDS 号: 830NN
ISSN: 0168-9002
________________________________________
第 34 条,共 209 条
标题: Single- and dual-pulse oscillation in a passively Q-switched Nd:YAG microchip laser
作者: Niu, LQ (Niu, Linquan); Gao, CX (Gao, Cunxiao); Zhu, SL (Zhu, Shaolan); Sun, CD (Sun, Chuandong); He, HD (He, Haodong); Song, ZY (Song, Zhiyuan); Tang, WD (Tang, Weidong)
来源出版物: OPTICS EXPRESS  卷: 19  期: 21  页: 20628-20633  DOI: 10.1364/OE.19.020628  出版年: OCT 10 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: Experimental investigation of single and dual pulses in a passively Q-switched Nd:YAG microchip laser with a Cr4+:YAG saturable absorber has been reported. The dual pulses consist of a main and a satellite pulse with respective spectra, intensities, and durations. It is found that the preponderant oscillating mode gives birth to the main pulse, and the other oscillating mode corresponds to the satellite pulse. Our results demonstrate that the dual-pulse emission results from double-longitudinal-mode oscillation in high pump regime. (C)2011 Optical Society of America
PubMed ID: 21997072
文献类型: Article
KeyWords Plus: CR4+-YAG SATURABLE ABSORBER; NET-NORMAL-DISPERSION; 1.34 MU-M; CONTINUOUS-WAVE; FIBER LASER; CR4+YAG CRYSTAL; POWER; OPERATION; TEMPERATURE; PERFORMANCE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 835VV
ISSN: 1094-4087
________________________________________
第 35 条,共 209 条
标题: Effects of the Host Morphologies on Luminescence Properties of Nd(3+)-Doped LaF(3) Nanoparticles
作者: She, JB (She, Jiangbo); Hou, CQ (Hou, Chaoqi); Guol, HT (Guol, Haitao); Gao, C (Gao, Chao); Cui, XX (Cui, Xiaoxia); Lu, M (Lu, Min); Wei, W (Wei, Wei); Peng, B (Peng, Bo)
来源出版物: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY  卷: 11  期: 10  页: 8609-8612  DOI: 10.1166/jnn.2011.4961  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: By using different surfactants, several host morphologies including rod-like, pot-like and shuttle-like of LaF(3):Nd(3+) (1% mol) nanoparticles were prepared by a simple microemulsion hydrothermal method, and their properties were characterised by XRD, TEM and photoluminescence spectroscopy. The experimental results indicated that the rod-like and pot-like nanocrystals possess well shaped hollow structures. The analysis of spectra proved that the local environment around the dopant ion changed with the different host morphology, which in turn influenced the luminescence properties. The luminescence lifetimes derived from biexponential fitting were 615 mu s (nanopots), 419 mu s (nanorods) and 194 mu s (nanoshuttles), respectively. This phenomenon is ascribed to the weakening effect of hollow or fenestral structures to the nonradiative ratio.
PubMed ID: 22400232
文献类型: Article
作者关键词: Fluorescence; Nanostructures; Rare-Earth Fluorides; Morphologies
Web of Science 类别: Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
研究方向: Chemistry; Science & Technology - Other Topics; Materials Science; Physics
IDS 号: 866ES
ISSN: 1533-4880
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第 36 条,共 209 条
标题: NUMERICAL SIMULATION OF ULTRA-BROADBAND PHASE-SENSITIVE OPTICAL PARAMETRIC AMPLIFICATION OF IMAGE
作者: Li, XF (Li, Xuefeng); Long, HB (Long, Hanbo); Liu, HJ (Liu, Hongjun)
来源出版物: JOURNAL OF RUSSIAN LASER RESEARCH  卷: 32  期: 6  页: 547-555  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The ultra-broadband phase-sensitive optical parametric amplification and de-amplification of image in a BBO nonlinear crystal with type I phase-matching are theoretically investigated. Amplified images with a gain of 10(8) and a bandwidth as broad as 420 nm are realized using a 25 GW/cm(-2) peak pump-power density with 1.125 ps chirped-pulse duration. The spatial resolution after optical parametric amplification is estimated to be q(0) -200 rad/mm (i.e., 31.8 lines/mm), which corresponds to the size of the minimum resolvable feature of the amplified image similar to 5 mu m.
文献类型: Article
作者关键词: optical parametric image amplification; ultra-broadband optical parametric amplification; phase-sensitive amplification
KeyWords Plus: AMPLIFIER; NOISE; LIGHT; PUMP
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 864IG
ISSN: 1071-2836
________________________________________
第 37 条,共 209 条
标题: Two dimensional principal components of natural images and its application
作者: Wang, D (Wang, Dong); Lu, HC (Lu, Huchuan); Li, XL (Li, Xuelong)
来源出版物: NEUROCOMPUTING  卷: 74  期: 17  页: 2745-2753  DOI: 10.1016/j.neucom.2011.03.047  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: In this paper, two dimensional principal components of natural images (2D-PCs) are proposed. Similar to principal components of natural images (1D-PCs), 2D-PCs can also be viewed as fundamental components of human's receptive field because they contain edge-like, bar-like and grating-like patterns. However, compared to 1D-PCs, 2D-PCs are of surprising symmetry, stable regularity, good interpretability, and have little computational complexity in real applications. Then, based on 1D-PCs and 2D-PCs, we design two kinds of statistical texture features (STF(1D) and STF(2D)), and apply them to multi-class facial expression recognition. Numerous experimental results demonstrate that our statistical texture features are better or not worse than other popular features for facial expression recognition. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: PCA; 2DPCA; Principal components; Two dimensional principal components; Natural images
KeyWords Plus: LOCAL BINARY PATTERNS; TEXTURE CLASSIFICATION; FACE RECOGNITION; REPRESENTATION; FEATURES; STATISTICS
Web of Science 类别: Computer Science, Artificial Intelligence
研究方向: Computer Science
IDS 号: 837OF
ISSN: 0925-2312
________________________________________
第 38 条,共 209 条
标题: Rapid pedestrian detection in unseen scenes
作者: Cao, XB (Cao, Xianbin); Wang, Z (Wang, Zhong); Yan, PK (Yan, Pingkun); Li, XL (Li, Xuelong)
来源出版物: NEUROCOMPUTING  卷: 74  期: 17  页: 3343-3350  DOI: 10.1016/j.neucom.2011.05.019  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: In this paper, a rapid adaptive pedestrian detection method based on cascade classifier with ternary pattern is proposed. The proposed method achieves its goal by employing the following three new strategies: (1) A method for adjusting the key parameters of the trained cascade classifier dynamically for detecting pedestrians in unseen scenes using only a small amount of labeled data from the new scenes. (2) An efficient optimization method is proposed, based on the cross entropy method and a priori knowledge of the scenes, to solve the classifier parameter optimization problem. (3) In order to further speed up pedestrian detection in unseen scenes, each strong classifier in the cascade employs a ternary detection pattern. In our experiments, two significantly different datasets, AHHF and NICTA, were used as the training set and testing set, respectively. The experimental results showed that the proposed method can quickly adapt a previously trained detector for pedestrian detection in various scenes compared with other existing methods. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Pedestrian detection system; Adaptive detector cascade classifier; Cross entropy; Ternary detection pattern
KeyWords Plus: OPTIMIZATION; ALGORITHM
Web of Science 类别: Computer Science, Artificial Intelligence
研究方向: Computer Science
IDS 号: 837OF
ISSN: 0925-2312
________________________________________
第 39 条,共 209 条
标题: Influence of spectral broadening on femtosecond wavelength conversion based on four-wave mixing in silicon waveguides
作者: Wang, ZL (Wang, Zhaolu); Liu, HJ (Liu, Hongjun); Huang, N (Huang, Nan); Sun, QB (Sun, Qibing); Wen, J (Wen, Jin)
来源出版物: APPLIED OPTICS  卷: 50  期: 28  页: 5430-5436  DOI: 10.1364/AO.50.005430  出版年: OCT 1 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: Femtosecond wavelength conversion in the telecommunication bands via four-wave mixing in a 1.5mm long silicon rib waveguide is theoretically investigated. Compared with picosecond pulses, the spectra are greatly broadened for the femtosecond pulses due to self-phase modulation and cross-phase modulation in the four-wave mixing process, and it is difficult to achieve a wavelength converter when the pump and signal pulse widths are close to or less than 100 fs in the telecommunication bands because of the spectral overlap. The influence of the spectral broadening on the conversion efficiency is also investigated. The conversion bandwidth of 220nm and peak conversion efficiency of -8 dB are demonstrated by using 500 fs pulses with higher efficiency than the picosecond pulse-pumped efficiency when the repetition rate is 100 GHz. (C) 2011 Optical Society of America
PubMed ID: 22016209
文献类型: Article
KeyWords Plus: SELF-PHASE MODULATION; MU-M WAVELENGTH; 2-PHOTON ABSORPTION; GENERATION; DISPERSION; PULSES; GAIN
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 832XA
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 40 条,共 209 条
标题: Hadamard Transform Spectrometer Mixed Pixels' Unmixing Method
作者: Yan, P (Yan Peng); Hu, BL (Hu Bing-liang); Liu, XB (Liu Xue-bin); Sun, W (Sun Wei); Li, LB (Li Li-bo); Feng, YT (Feng Yu-tao); Liu, YZ (Liu Yong-zheng)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 10  页: 2870-2873  DOI: 10.3964/j.issn.1000-0593(2011)10-2870-04  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: Hadamard transform imaging spectrometer is a multi-channel digital transform spectrometer detection technology, this paper based on digital micromirror array device (DMD) of the Hadamard transform spectrometer working principle and instrument structure, obtained by the imaging sensor mixed pixel were analyzed, theory derived the solution of pixel aliasing hybrid method, simulation results show that the method is simple and effective to improve the accuracy of mixed pixel spectrum more than 10% recovery.
文献类型: Article
作者关键词: Hadamad transform; Mixed pixel; Imaging spectrometer; DMD
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 829DL
ISSN: 1000-0593
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第 41 条,共 209 条
标题: Biopsy needle detection in transrectal ultrasound
作者: Ayvaci, A (Ayvaci, Alper); Yan, PK (Yan, Pingkun); Xu, S (Xu, Sheng); Soatto, S (Soatto, Stefano); Kruecker, J (Kruecker, Jochen)
来源出版物: COMPUTERIZED MEDICAL IMAGING AND GRAPHICS  卷: 35  期: 7-8  特刊: SI  页: 653-659  DOI: 10.1016/j.compmedimag.2011.03.005  出版年: OCT-DEC 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: Using the fusion of pre-operative MRI and real time intra-procedural transrectal ultrasound (TRUS) to guide prostate biopsy has been shown as a very promising approach to yield better clinical outcome than the routinely performed TRUS only guided biopsy. In several situations of the MRI/TRUS fusion guided biopsy, it is important to know the exact location of the deployed biopsy needle, which is imaged in the TRUS video. In this paper, we present a method to automatically detect and segment the biopsy needle in TRUS. To achieve this goal, we propose to combine information from multiple resources, including ultrasound probe stability, TRUS video background model, and the prior knowledge of needle orientation and position. The proposed algorithm was tested on TRUS video sequences which have in total more than 25,000 frames. The needle deployments were successfully detected and segmented in the sequences with high accuracy and low false-positive detection rate. (C) 2011 Elsevier Ltd. All rights reserved.
PubMed ID: 21531538
文献类型: Article
作者关键词: Needle detection; Interventional guidance; Prostate; Transrectal ultrasound; Fusion; Prior knowledge
KeyWords Plus: GUIDED PROSTATE BIOPSY; ENERGY MINIMIZATION; GRAPH CUTS; SEGMENTATION
Web of Science 类别: Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging
研究方向: Engineering; Radiology, Nuclear Medicine & Medical Imaging
IDS 号: 828ZB
ISSN: 0895-6111
________________________________________
第 42 条,共 209 条
标题: Vehicle Detection and Motion Analysis in Low-Altitude Airborne Video Under Urban Environment
作者: Cao, XB (Cao, Xianbin); Wu, CX (Wu, Changxia); Lan, JH (Lan, Jinhe); Yan, PK (Yan, Pingkun); Li, XL (Li, Xuelong)
来源出版物: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY  卷: 21  期: 10  页: 1522-1533  DOI: 10.1109/TCSVT.2011.2162274  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 7
被引频次合计: 9
摘要: Visual surveillance from low-altitude airborne platforms plays a key role in urban traffic surveillance. Moving vehicle detection and motion analysis are very important for such a system. However, illumination variance, scene complexity, and platform motion make the tasks very challenging. In addition, the used algorithms have to be computationally efficient in order to be used on a real-time platform. To deal with these problems, a new framework for vehicle detection and motion analysis from low-altitude airborne videos is proposed. Our paper has two major contributions. First, to speed up feature extraction and to retain additional global features in different scales for higher classification accuracy, a boosting light and pyramid sampling histogram of oriented gradients feature extraction method is proposed. Second, to efficiently correlate vehicles across different frames for vehicle motion trajectories computation, a spatio-temporal appearance-related similarity measure is proposed. Compared to other representative existing methods, our experimental results showed that the proposed method is able to achieve better performance with higher detection rate, lower false positive rate, and faster detection speed.
文献类型: Article
作者关键词: Motion analysis; moving vehicle detection; spatio-temporal; urban environment
KeyWords Plus: SURVEILLANCE; EXTRACTION
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: 829MC
ISSN: 1051-8215
________________________________________
第 43 条,共 209 条
标题: Supercontinuum generation employing the high-energy wave-breaking-free pulse in a compact all-fiber laser system
作者: Wang, LR (Wang, L. R.); Liu, XM (Liu, X. M.); Gong, YK (Gong, Y. K.); Mao, D (Mao, D.); Duan, LN (Duan, L. N.)
来源出版物: LASER PHYSICS  卷: 21  期: 10  页: 1797-1803  DOI: 10.1134/S1054660X11170245  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 8
被引频次合计: 8
摘要: Supercontinuum (SC) generation is experimentally achieved in a compact all-fiber laser system by using high-energy wave-breaking-free dissipative soliton (DS) pulses. The pulses exhibit Gaussian (rectangular) shape profiles in spectral (temporal) domain, which is even reversed of the typical rectangular-spectrum DSs. With the increase of pump power the pulse duration enlarges dramatically whereas the bandwidth and peak power of the pulse keep almost constant, which enables the pulse to accumulate much higher energy during the pulse-shaping process. When inputting the amplified pulse into the single-mode fiber, SC with excellent flatness is generated with the spectral range from about 1550 to 1700 nm. Broader SC with the bandwidth of even larger than 1000 nm can also be generated by this kind of pulse in the near-zero-dispersion-flattened photonic-crystal fiber through strong nonlinear effects.
文献类型: Article
KeyWords Plus: PHOTONIC-CRYSTAL-FIBER; NET-NORMAL-DISPERSION; DISSIPATIVE SOLITONS; ANOMALOUS-DISPERSION; SATURABLE ABSORBER; AMPLIFICATION; OSCILLATOR; EVOLUTION; AMPLIFIER; GRAPHENE
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 828WU
ISSN: 1054-660X
________________________________________
第 44 条,共 209 条
标题: Comparison of supercontinuum generation based on high-energy nanosecond pulses via single-mode and photonic-crystal fibers
作者: Duan, LN (Duan, L. N.); Liu, XM (Liu, X. M.); Wang, LR (Wang, L. R.); Mao, D (Mao, D.); Wang, GX (Wang, G. X.)
来源出版物: LASER PHYSICS  卷: 21  期: 10  页: 1813-1819  DOI: 10.1134/S1054660X11190091  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 10
摘要: We have experimentally investigated the supercontinuum (SC) generation based on high-energy Gaussian-spectrum pulses emitted from an erbium-doped fiber laser with large-anomalous dispersion. The pulses exhibit rectangular shape in temporal domain with the pulse duration of about 16 ns. When the amplified pulses propagate through 10-km single-mode fiber, the SC ranged from 1530 to 1750 nm arises from the stimulated-Raman-scattering effect and the pulses break up due to the modulation instability. Comparatively, when the amplified pulses propagate through a segment of highly-nonlinear zero-dispersion-flattened photonic crystal fiber, super-broad SC beyond the range of 1300-1750 nm is generated due to strong four-wave mixing effect, whereas the pulses almost maintain their shapes.
文献类型: Article
KeyWords Plus: NET-NORMAL-DISPERSION; DISSIPATIVE SOLITON; SELF-SIMILARITY; LASER SYSTEM; RING LASER; OSCILLATOR
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 828WU
ISSN: 1054-660X
________________________________________
第 45 条,共 209 条
标题: Guiding and Confining Light in Low-Index Circularly Symmetric Waveguides
作者: Zhang, WF (Zhang, Wenfu); Mu, JW (Mu, Jian-Wei); Huang, WP (Huang, Wei-Ping); Zhao, W (Zhao, Wei)
来源出版物: IEEE PHOTONICS JOURNAL  卷: 3  期: 5  页: 854-860  DOI: 10.1109/JPHOT.2011.2167602  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: A circularly symmetric waveguide with a low-index ring inside the core has been proposed and studied comprehensively. By taking advantage of the azimuthal TM01 mode, the structure can confine light inside the low-index region with very high power confinement efficiency. Key characteristic parameters as functions of geometry factors have been investigated through rigorous finite-difference methods. The fabrication tolerance and the material candidate for various potential applications have been discussed.
文献类型: Article
作者关键词: Waveguides; nanowires; subwavelength structures
KeyWords Plus: OPTICAL-FIBER; SUPERCONTINUUM GENERATION; BRAGG FIBERS; AIR-CORE; FIELD; TRANSMISSION; DESIGN
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: 827RY
ISSN: 1943-0655
________________________________________
第 46 条,共 209 条
标题: Zernike-Moment-Based Image Super Resolution
作者: Gao, XB (Gao, Xinbo); Wang, Q (Wang, Qian); Li, XL (Li, Xuelong); Tao, DC (Tao, Dacheng); Zhang, KB (Zhang, Kaibing)
来源出版物: IEEE TRANSACTIONS ON IMAGE PROCESSING  卷: 20  期: 10  页: 2738-2747  DOI: 10.1109/TIP.2011.2134859  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 17
被引频次合计: 20
摘要: Multiframe super-resolution (SR) reconstruction aims to produce a high-resolution (HR) image using a set of low-resolution (LR) images. In the process of reconstruction, fuzzy registration usually plays a critical role. It mainly focuses on the correlation between pixels of the candidate and the reference images to reconstruct each pixel by averaging all its neighboring pixels. Therefore, the fuzzy-registration-based SR performs well and has been widely applied in practice. However, if some objects appear or disappear among LR images or different angle rotations exist among them, the correlation between corresponding pixels becomes weak. Thus, it will be difficult to use LR images effectively in the process of SR reconstruction. Moreover, if the LR images are noised, the reconstruction quality will be affected seriously. To address or at least reduce these problems, this paper presents a novel SR method based on the Zernike moment, to make the most of possible details in each LR image for high-quality SR reconstruction. Experimental results show that the proposed method outperforms existing methods in terms of robustness and visual effects.
PubMed ID: 21926001
文献类型: Article
作者关键词: Fuzzy motion estimation; image super resolution (SR); Zernike moment
KeyWords Plus: SUPERRESOLUTION IMAGE; RECONSTRUCTION; RESTORATION; RECOGNITION; ALGORITHMS; NOISY
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 821XP
ISSN: 1057-7149
________________________________________
第 47 条,共 209 条
标题: Clock drift-tolerant optical bit pattern monitoring technique in asynchronous undersampling system
作者: Zhang, HX (Zhang, Huixing); Zhao, W (Zhao, Wei)
来源出版物: OPTICAL ENGINEERING  卷: 50  期: 10  文献号: 105008  DOI: 10.1117/1.3640828  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Based on an asynchronously undersampling system, we present a novel bit pattern monitoring technique in terms of its performance analysis and the implementation aspects. Relying upon an finite impulse response (FIR) filter assisted fine synchronization of the acquired samples, the technique can significantly reduce the random walk clock drift between data signal and sampling source compared to a conventional fine synchronization using a fixed time step. For the performance analysis of this technique, we first present an intuitive understanding of the principle of the FIR filter method under consideration of the filter frequency response. We find that the frequency response of the FIR filter simply serves to extract the spectral component at the aliasing frequency found in the periodogram and diminish all other frequency components. Then we test the tracking limit and discuss the optimized filter length choice of the new bit pattern monitoring technique through numerical examples. It turns out that the optimal filter length is chosen as the one which minimized the measured jitter and can be found iteratively. Finally, we present an experimental verification of this FIR bit pattern synchronization method by measuring and reconstructing bit patterns of 40 Gb/s nonreturn-to-zero and 160 Gb/s return-to-zero data signals, respectively. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3640828]
文献类型: Article
作者关键词: optical bit pattern monitoring; clock-drift tolerant; asynchronous optical sampling; optical communications
KeyWords Plus: EYE-DIAGRAM MEASUREMENT; WAVE-FORM MEASUREMENT; CONSTELLATION DIAGRAMS; FIBER; SENSITIVITY; GUIDE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 842BA
ISSN: 0091-3286
电子 ISSN: 1560-2303
________________________________________
第 48 条,共 209 条
标题: Solid waste plasma disposal plant
作者: Yang, LQ (Yang, Liqing); Wang, HJ (Wang, Haojing); Wang, HF (Wang, Hongfei); Wang, DP (Wang, Dapeng); Wang, Y (Wang, Yue)
来源出版物: JOURNAL OF ELECTROSTATICS  卷: 69  期: 5  页: 411-413  DOI: 10.1016/j.elstat.2011.05.007  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: This review describes the current status of waste plasma disposal plant. A comprehensive analysis of the available scientific and technical literature on waste plasma disposal plant, including the actual plant design and configuration, operation principle of core facility, the economic viability and floor area of a plasma plant. The case on the development and large scale commercial applications of the solid waste plasma disposal plant should be further research. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Review
作者关键词: Plasma technology; Solid waste; Disposal; Operation principle; Economic analysis
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: 816EX
ISSN: 0304-3886
________________________________________
第 49 条,共 209 条
标题: HIGH EFFICIENCY AND HIGH BEAM QUALITY 3.467-mu m KTA EXTRACAVITY OPTICAL PARAMETRIC OSCILLATOR
作者: Sun, QB (Sun, Qibing); Liu, HJ (Liu, Hongjun); Huang, N (Huang, Nan); Ruan, C (Ruan, Chi); Zhu, SL (Zhu, Shaolan); Zhao, W (Zhao, Wei)
来源出版物: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS  卷: 53  期: 10  页: 2204-2207  DOI: 10.1002/mop.26247  出版年: OCT 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: An efficient single resonant extracavity optical parametric oscillator is demonstrated based on a Type II noncritical phase matching KTA crystal. Under a pump power of 0.6 W and a pulse width of 13 ns, the average power of 86 mW at 3.467 mu m is obtained with the pulse width of 6 ns and repetition rate of 100 Hz, corresponding to a conversion efficiency as high as 14% from 1.064 to 3.467 mu m. The beam spatial profile for 3.467 pm is near TEM(00) mode. The average power of 123 mW is also obtained with a multitransverse mode at the repetition rate of 200 Hz and an average power of 2.3 W of the pump laser. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2204-2207, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26247
文献类型: Article
作者关键词: mid-infrared; KTA OPO; high conversion efficiency
KeyWords Plus: POLED LITHIUM-NIOBATE; LASER; MODE; THRESHOLD; OPO
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: 808PQ
ISSN: 0895-2477
________________________________________
第 50 条,共 209 条
标题: Segmentation of retinal blood vessels using the radial projection and semi-supervised approach
作者: You, XG (You, Xinge); Peng, QM (Peng, Qinmu); Yuan, Y (Yuan, Yuan); Cheung, YM (Cheung, Yiu-ming); Lei, JJ (Lei, Jiajia)
来源出版物: PATTERN RECOGNITION  卷: 44  期: 10-11  特刊: SI  页: 2314-2324  DOI: 10.1016/j.patcog.2011.01.007  出版年: OCT-NOV 2011 
Web of Science 核心合集中的 "被引频次": 18
被引频次合计: 18
摘要: Automatic segmentation of retinal blood vessels has become a necessary diagnostic procedure in ophthalmology. The blood vessels consist of two types of vessels, i.e., thin vessels and wide vessels. Therefore, a segmentation method may require two different processes to treat different vessels. However, traditional segmentation algorithms hardly draw a distinction between thin and wide vessels, but deal with them together. The major problems of these methods are as follows: (1) If more emphasis is placed on the extraction of thin vessels, the wide vessels tend to be over detected; and more artificial vessels are generated, too. (2) If more attention is paid on the wide vessels, the thin and low contrast vessels are likely to be missing. To overcome these problems, a novel scheme of extracting the retinal vessels based on the radial projection and semi-supervised method is presented in this paper. The radial projection method is used to locate the vessel centerlines which include the low-contrast and narrow vessels. Further, we modify the steerable complex wavelet to provide better capability of enhancing vessels under different scales, and construct the vector feature to represent the vessel pixel by line strength. Then, semi-supervised self-training is used for extraction of the major structures of vessels. The final segmentation is obtained by the union of the two types of vessels. Our approach is tested on two publicly available databases. Experiment results show that the method can achieve improved detection of thin vessels and decrease false detection of vessels in pathological regions compared to rival solutions. (C) 2011 Published by Elsevier Ltd.
文献类型: Article
作者关键词: Radial projection; Retinal images; Steerable complex wavelet
KeyWords Plus: VASCULAR SEGMENTATION; MATCHED-FILTERS; IMAGES; CLASSIFICATION; MODEL; ALGORITHM; WAVELET
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 793UI
ISSN: 0031-3203

第 51 条,共 209 条
标题: Transfer latent variable model based on divergence analysis
作者: Gao, XB (Gao, Xinbo); Wang, XM (Wang, Xiumei); Li, XL (Li, Xuelong); Tao, DC (Tao, Dacheng)
来源出版物: PATTERN RECOGNITION  卷: 44  期: 10-11  特刊: SI  页: 2358-2366  DOI: 10.1016/j.patcog.2010.06.013  出版年: OCT-NOV 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 14
摘要: Latent variable models are powerful dimensionality reduction approaches in machine learning and pattern recognition. However, this kind of methods only works well under a necessary and strict assumption that the training samples and testing samples are independent and identically distributed. When the samples come from different domains, the distribution of the testing dataset will not be identical with the training dataset. Therefore, the performance of latent variable models will be degraded for the reason that the parameters of the training model do not suit for the testing dataset. This case limits the generalization and application of the traditional latent variable models. To handle this issue, a transfer learning framework for latent variable model is proposed which can utilize the distance (or divergence) of the two datasets to modify the parameters of the obtained latent variable model. So we do not need to rebuild the model and only adjust the parameters according to the divergence, which will adopt different datasets. Experimental results on several real datasets demonstrate the advantages of the proposed framework. (C) 2010 Elsevier Ltd. All rights reserved.
文献类型: Article
作者关键词: Dimensionality reduction; Latent variable model; Transfer learning; Bregman divergence
KeyWords Plus: NONLINEAR DIMENSIONALITY REDUCTION; PRINCIPAL COMPONENT ANALYSIS; FRAMEWORK
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 793UI
ISSN: 0031-3203
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第 52 条,共 209 条
标题: Optimization for limited angle tomography in medical image processing
作者: Lu, XQ (Lu, Xiaoqiang); Sun, Y (Sun, Yi); Yuan, Y (Yuan, Yuan)
来源出版物: PATTERN RECOGNITION  卷: 44  期: 10-11  特刊: SI  页: 2427-2435  DOI: 10.1016/j.patcog.2010.12.016  出版年: OCT-NOV 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: This paper aims to reduce the problems of incomplete data in computed tomography, which happens frequently in medical image process and analysis, e.g., when the high-density region of objects can only be penetrated by X-rays at a limited angular range. As the projection data are available only in an angular range, the incomplete data problem can be attributed to the limited angle problem, which is an ill-posed inverse problem. Image reconstruction based on total variation (TV) reduces the problem and gives better performance on edge-preserving reconstruction: however, the artificial parameter can only be determined through considerable experimentation. In this paper, an effective TV objective function is proposed to reduce the inverse problem in the limited angle tomography. This novel objective function provides a robust and effective reconstruction without any artificial parameter in the iterative processes, using the TV as a multiplicative constraint. The results demonstrate that this reconstruction strategy outperforms some previous ones. (C) 2011 Published by Elsevier Ltd.
文献类型: Article
作者关键词: Limited angle tomography; Ill-posed inverse problem; Total variation (TV)
KeyWords Plus: EXTERIOR RADON-TRANSFORM; X-RAY TOMOGRAPHY; COMPUTED-TOMOGRAPHY; STATISTICAL INVERSION; INCOMPLETE DATA; BEAM CT; RECONSTRUCTION; RADIOGRAPHS; PROJECTIONS; ALGORITHMS
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 793UI
ISSN: 0031-3203
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第 53 条,共 209 条
标题: Optical bistability in metal-insulator-metal plasmonic waveguide with nanodisk resonator containing Kerr nonlinear medium
作者: Wang, GX (Wang, Guoxi); Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Gong, YK (Gong, Yongkang); Wang, LR (Wang, Leiran)
来源出版物: APPLIED OPTICS  卷: 50  期: 27  页: 5287-5290  DOI: 10.1364/AO.50.005287  出版年: SEP 20 2011 
Web of Science 核心合集中的 "被引频次": 19
被引频次合计: 19
摘要: We numerically investigate the optical bistability effect in the metal-insulator-metal waveguide with a nanodisk resonator containing a Kerr nonlinear medium. It is found that the increase of the refractive index, which is induced by enhancing the incident intensity, can cause a redshift for the resonance wavelength. The local resonant field excited in the nanodisk cavity can significantly increase the Kerr nonlinear effect. In addition, an obvious bistability loop is observed in the proposed structure. This nonlinear structure can find important applications for all-optical switching in highly integrated optical circuits. (C) 2011 Optical Society of America
PubMed ID: 21947047
文献类型: Article
KeyWords Plus: POLARITON PROPAGATION; DIRECTIONAL COUPLER; BRAGG GRATINGS; PERFORMANCE; REFLECTOR; BANDGAP; FILTERS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 822EZ
ISSN: 1559-128X
电子 ISSN: 2155-3165
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第 54 条,共 209 条
标题: High-power picosecond terahertz-wave generation in photonic crystal fiber via four-wave mixing
作者: Wu, HH (Wu, Huihui); Liu, HJ (Liu, Hongjun); Huang, N (Huang, Nan); Sun, QB (Sun, Qibing); Wen, J (Wen, Jin)
来源出版物: APPLIED OPTICS  卷: 50  期: 27  页: 5338-5343  DOI: 10.1364/AO.50.005338  出版年: SEP 20 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: We demonstrate picosecond terahertz (THz)-wave generation via four-wave mixing in an octagonal photonic crystal fiber (O-PCF). Perfect phase-matching is obtained at the pump wavelength of 1.55 mu m and a generation scheme is proposed. Using this method, THz waves can be generated in the frequency range of 7.07-7.74 THz. Moreover, peak power of 2.55 W, average power of 1.53 mW, and peak conversion efficiency of more than -66.65 dB at 7.42 THz in a 6.25 cm long fiber are realized with a pump peak power of 2kW. (C) 2011 Optical Society of America
PubMed ID: 21947055
文献类型: Article
KeyWords Plus: CONVERSION; PROPAGATION; EFFICIENT; PULSES
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 822EZ
ISSN: 1559-128X
电子 ISSN: 2155-3165
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第 55 条,共 209 条
标题: Wideband ultraflat slow light with large group index in a W1 photonic crystal waveguide
作者: Liang, J (Liang, Jian); Ren, LY (Ren, Li-Yong); Yun, MJ (Yun, Mao-Jin); Han, X (Han, Xu); Wang, XJ (Wang, Xing-Jun)
来源出版物: JOURNAL OF APPLIED PHYSICS  卷: 110  期: 6  文献号: 063103  DOI: 10.1063/1.3634074  出版年: SEP 15 2011 
Web of Science 核心合集中的 "被引频次": 18
被引频次合计: 18
摘要: We demonstrate that slow light with large group-index, wideband, and low dispersion can be realized in a silicon-on-insulator W1-type photonic crystal waveguide by simply shifting the first two rows of air-holes adjacent to the waveguide to specific directions. Keeping the group index at 46, 60, 86, 111, 151, and 233, respectively, while restricting its variation within a +/- 10% range, we accordingly obtain a slow light bandwidth of 9.0 nm, 6.7 nm, 4.6 nm, 3.3 nm, 2.4 nm, and 1.7 nm, respectively. The normalized delay-bandwidth product keeps around 0.25 for all cases. Moreover, we obtain ultraflat slow light with bandwidths over 3.0 nm, 2.4 nm, 1.6 nm, 1.3 nm, 0.93 nm, and 0.6 nm, respectively, where the group index variation is in a range of only +/- 0.8%. Numerical simulations are performed, utilizing the 2D plane wave expansion method and the finite-difference time-domain method. (C) 2011 American Institute of Physics. [doi:10.1063/1.3634074]
文献类型: Article
KeyWords Plus: LOW-DISPERSION
Web of Science 类别: Physics, Applied
研究方向: Physics
IDS 号: 829XJ
ISSN: 0021-8979
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第 56 条,共 209 条
标题: An adaptive OPD and dislocation prediction used characteristic of interference pattern for interference hyperspectral image compression
作者: Wen, J (Wen, Jia); Ma, CW (Ma, Caiwen); Shui, PL (Shui, Penglang)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 20  页: 4903-4909  DOI: 10.1016/j.optcom.2011.06.061  出版年: SEP 15 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: According to the imaging principle and characteristic of LASIS (Large Aperture Static Interference Imaging Spectrometer), we discovered that the 3D (three dimensional) image sequences formed by different interference pattern frames, which were formed in the imaging process of LASIS Interference hyperspectral image, had much stronger correlation than the original interference hyperspectral image sequences, either in 2D (two dimensional) spatial domain or in the spectral domain. We put this characteristic into image compression and proposed an adaptive OPD (optical path difference) and dislocation prediction algorithm for interference hyperspectral image compression. Compared the new algorithm proposed in this paper with Dual-Direction Prediction [1] proposed in 2009, lots of experimental results showed that the prediction error entropy of the new algorithm was much smaller. In the prediction step of lifting wavelet transform, this characteristic would also reduce the entropy of coefficients in high frequency significantly, which would be more advantageous for quantification coding [2]. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Optical information; Spectrum compression; Interference pattern; LASIS; Interference hyperspectral image
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 816DP
ISSN: 0030-4018
________________________________________
第 57 条,共 209 条
标题: Perfect absorber supported by optical Tamm states in plasmonic waveguide
作者: Gong, YK (Gong, Yongkang); Liu, XM (Liu, Xueming); Lu, H (Lu, Hua); Wang, LR (Wang, Leiran); Wang, GX (Wang, Guoxi)
来源出版物: OPTICS EXPRESS  卷: 19  期: 19  页: 18393-18398  DOI: 10.1364/OE.19.018393  出版年: SEP 12 2011 
Web of Science 核心合集中的 "被引频次": 14
被引频次合计: 14
摘要: Based on a two-dimensional plasmonic metal-dielectric-metal (MDM) waveguide with a thin metallic layer and a dielectric photonic crystal in the core, a novel absorber at visual and near-infrared frequencies is presented. The absorber spectra and filed distributions are investigated by the transfer-matrix-method and the finite-difference time-domain method. Numerical results show that attributing to excitation of the optical Tamm states in the MDM waveguide core, the optical wave is trapped in the proposed structure without reflection and transmission, leading to perfect absorption as high as 0.991. The proposed absorber can find useful application in all-optical integrated photonic circuits. (C) 2011 Optical Society of America
PubMed ID: 21935207
文献类型: Article
KeyWords Plus: BRAGG REFLECTORS; ABSORPTION; FILM
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 818UL
ISSN: 1094-4087
________________________________________
第 58 条,共 209 条
标题: InAs/GaSb type-II superlattice grown by MOCVD for long-wavelength infrared detection
作者: Xin, LW (Xin, Liwei); Wang, T (Wang, Tao); Yang, J (Yang, Jin); Wang, JW (Wang, Jingwei); Yin, F (Yin, Fei); Hu, YA (Hu, Yanan); Jiao, GH (Jiao, Guohua); Zhang, LC (Zhang, Lichen); Yin, JZ (Yin, Jingzhi); Song, ZY (Song, Zhenyu)
来源出版物: OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS  卷: 5  期: 9  页: 1017-1020  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Recently, many characteristics of the InAs/GaSb type-II superlattice(SL) have been investigated. However, little research work has been devoted to the source flux control, which is very important for improving the property of the SL. Based on the technology of metal organic chemical vapor deposition (MOCVD) on GaSb substrate, which has a better cost effectiveness for large-scale production, SL with excellent crystal quality is proposed in this paper. Furthermore, the importance of source flux control is analyzed by comparison of the low-temperature photoluminescence (PL) spectra of the SL grown with a special source flux control and that with a simple source flux control. The x-ray diffraction(XRD) data and the surface morphology obtained by atomic force microscopy(AFM) show that the SL designed by us has smooth surface, and the peak sense wavelength of the SL is around 10 mu m.
文献类型: Article
作者关键词: B1.InAs/GaSb; A3.superlattices; A3.source flux control; A3.MOCVD; A1.PL spectra
KeyWords Plus: OPTICAL CHARACTERIZATION; PHOTODIODES
Web of Science 类别: Materials Science, Multidisciplinary; Optics
研究方向: Materials Science; Optics
IDS 号: 856JY
ISSN: 1842-6573
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第 59 条,共 209 条
标题: A NOVEL METRIC BASED ON MCA FOR IMAGE QUALITY
作者: He, LH (He, Lihuo); Lu, W (Lu, Wen); Gao, XB (Gao, Xinbo); Tao, DC (Tao, Dacheng); Li, XL (Li, Xuelong)
来源出版物: INTERNATIONAL JOURNAL OF WAVELETS MULTIRESOLUTION AND INFORMATION PROCESSING  卷: 9  期: 5  页: 743-757  DOI: 10.1142/S0219691311004298  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Considering that the Human Visual System (HVS) has different perceptual characteristics for different morphological components, a novel image quality metric is proposed by incorporating Morphological Component Analysis (MCA) and HVS, which is capable of assessing the image with different kinds of distortion. Firstly, reference and distorted images are decomposed into linearly combined texture and cartoon components by MCA respectively. Then these components are turned into perceptual features by Just Noticeable Difference (JND) which integrates masking features, luminance adaptation and Contrast Sensitive Function (CSF). Finally, the discrimination between reference and distorted images perceptual features is quantified using a pooling strategy before the final image quality is obtained. Experimental results demonstrate that the performance of the proposed prevails over some existing methods on LIVE database II.
文献类型: Article
作者关键词: Image quality assessment; morphological component analysis; human visual system; just noticeable difference
KeyWords Plus: MORPHOLOGICAL DIVERSITY; SOURCE SEPARATION; CONTOURLET; DISTORTION; MODEL
Web of Science 类别: Computer Science, Software Engineering; Mathematics, Interdisciplinary Applications
研究方向: Computer Science; Mathematics
IDS 号: 842TP
ISSN: 0219-6913
________________________________________
第 60 条,共 209 条
标题: Influence of the initial chirp on the supercontinuum generation in silicon-on-insulator waveguide
作者: Wen, J (Wen, J.); Liu, H (Liu, H.); Huang, N (Huang, N.); Sun, Q (Sun, Q.); Zhao, W (Zhao, W.)
来源出版物: APPLIED PHYSICS B-LASERS AND OPTICS  卷: 104  期: 4  页: 867-871  DOI: 10.1007/s00340-011-4496-1  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 6
被引频次合计: 6
摘要: We propose a practical method to broaden the bandwidth of supercontinuum generated in silicon-on-insulator (SOI) waveguide by controlling the initial chirp of inputting femtosecond pulses, which has the main impact on the initial stage of the spectral broadening caused by the self-phase modulation (SPM) effect. The numerical results show that the bandwidth and flatness of the supercontinuum generated in SOI waveguide are sensitive to the initial chirp of inputting femtosecond pulses, the supercontinuum bandwidth can be remarkably enhanced by inputting positive chirp femtosecond pulses with a decreased propagation distance required by soliton fission, and the maximum bandwidth of supercontinuum can be increased to 1500 nm.
文献类型: Article
KeyWords Plus: PHOTONIC CRYSTAL FIBERS; OPTICAL COHERENCE TOMOGRAPHY; SOLITON FISSION; WAVELENGTH CONVERSION; CONTINUUM GENERATION; DISPERSION; PULSES; WIRES; PROPAGATION; MODULATION
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 829VE
ISSN: 0946-2171
________________________________________
第 61 条,共 209 条
标题: All fiber supercontinuum light source using photonic crystal fibers pumped by nanosecond fiber laser pulses
作者: Zhu, SL (Zhu, S. L.); Gao, CX (Gao, C. X.); He, HD (He, H. D.); Feng, L (Feng, L.); Cao, ZY (Cao, Z. Y.)
来源出版物: LASER PHYSICS  卷: 21  期: 9  页: 1629-1632  DOI: 10.1134/S1054660X11150412  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 4
摘要: A novel compact supercontinuum (SC) source using the single mode photonic crystal fibers (PCF) pumped with an all fiber MOPA fiber laser is demonstrated experimentally. A bandwidth of 700 nm is achieved by operating the pumping fiber laser at a wavelength of 1064 nm, pulse duration of 10 ns, repetition rate of 50 kHz and peak power of 1 kW. The SC generation is initiated through modulation instability (MI) which breakups the nanosecond pump pulses into picosecond or femtosecond pulses, and further broadened through nonlinear effects of PCF.
文献类型: Article
KeyWords Plus: MICROSTRUCTURED FIBER; GENERATION; DISPERSION; SYSTEM; GLASS
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 818GB
ISSN: 1054-660X
________________________________________
第 62 条,共 209 条
标题: Tunable third-harmonic generation in a solid-core tellurite glass fiber
作者: Lin, AX (Lin, Aoxiang); Ryasnyanskiy, A (Ryasnyanskiy, Aleksandr); Toulouse, J (Toulouse, Jean)
来源出版物: OPTICS LETTERS  卷: 36  期: 17  页: 3437-3439  出版年: SEP 1 2011 
Web of Science 核心合集中的 "被引频次": 13
被引频次合计: 13
摘要: A solid-core tellurite glass fiber with 1.8 dB/m loss at 1.55 mu m was made by using the built-in casting preform fabrication method and rod-in-tube fiber drawing technique. Pumping a 10 cm fiber piece with picosecond pulses of 3-5 x 10(12) W/cm(2), 0.1% of the fundamental power limited by the coherence length of 0.3-5 mu m was converted into visible third-harmonic power tunable over a broad near-IR wavelength ranging from 1500 to 1680 nm. Frequency conversion from the mid-IR to near-IR was found to be even more efficient due to the longer coherence lengths of 12-20 mu m in the wavelength range of 2200-2500 nm. (C) 2011 Optical Society of America
PubMed ID: 21886236
文献类型: Article
KeyWords Plus: OPTICAL-FIBERS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 817JC
ISSN: 0146-9592
________________________________________
第 63 条,共 209 条
标题: Error-free OTDM demultiplexer using the supercontinuum spectrum-slicing induced clock signal
作者: Feng, H (Feng, Huan); Zhao, W (Zhao, Wei); Yan, SY (Yan, Shuangyi); Xie, XP (Xie, Xiaoping)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 19  页: 4327-4330  DOI: 10.1016/j.optcom.2011.05.027  出版年: SEP 1 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We experimentally demonstrate an 80-Gb/s optical time-division multiplexing (OTDM) demultiplexing system based on the cross-phase modulation (XPM) effect in high-nonlinearity fibers. The message carried by OTDM signal is loaded onto the probe signal by sampling the OTDM packet with a 10-GHz stable and controllable clock pulse train. The clock signal with similar to 11 ps pulse width is achieved by employing supercontinuum spectrum-slicing technique, which is distinct from that based on mode-locked lasers. The demultiplexed signal is obtained by filtering out the XPM-induced spectral sidebands of the probe signal. The OTDM demultiplexer based on this novel technique shows excellent performances and contributes to a bit error rate of as low as 10(-9). (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Self-phase modulation; Cross-phase modulation; Super-continuum spectrum; OTDM demultiplexing
KeyWords Plus: OPTICAL LOOP MIRROR; NORMAL-DISPERSION FIBER; PHOTONIC CRYSTAL FIBER; WALK-OFF-FREE; NONLINEAR FIBER; LOW-NOISE; LASER; DIVISION; PULSES; JITTER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 813NR
ISSN: 0030-4018
________________________________________
第 64 条,共 209 条
标题: Gaseous ammonia fluorescence probe based on cellulose acetate modified microstructured optical fiber
作者: Peng, LR (Peng, Lirong); Yang, XH (Yang, Xinghua); Yuan, LB (Yuan, Libo); Wang, LL (Wang, Lili); Zhao, EM (Zhao, Enming); Tian, FJ (Tian, Fengjun); Liu, YX (Liu, Yanxin)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 19  页: 4810-4814  DOI: 10.1016/j.optcom.2011.06.015  出版年: SEP 1 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 3
摘要: In this article, we report a novel fluorescent ammonia gas probe based on microstructured optical fiber (MOF) which is modified with eosin-doped cellulose acetate film. This probe was fabricated by liquid fluxion coating process. Polymer solution doped with eosin was directly inhaled into 18 array holes of MOF and then formed matrix film in them. The sensing properties of the optical fiber sensor to gaseous ammonia at room temperature were investigated. The sensing probe showed different fluorescence intensity at 576 nm to different concentrations of trace ammonia in carrier gas of nitrogen. The response range was 50-400 ppm, with short response time within 500 ms. Furthermore, the response range could be tailored through CTAB co-entrapment process in the sensing film. These test results demonstrated that low cost, simple structured fiber optic sensors for detecting ammonia gas samples could be developed based on MOF. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: fluorescence; Ammonia; Optical sensing; Microstructured optical fiber
KeyWords Plus: ENHANCED RAMAN-SCATTERING; PHOTONIC CRYSTAL FIBER; GAS SENSORS; CORE; SPECTROSCOPY; SILVER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 813NR
ISSN: 0030-4018
________________________________________
第 65 条,共 209 条
标题: Image quality assessment based on S-CIELAB model
作者: He, LH (He, Lihuo); Gao, XB (Gao, Xinbo); Lu, W (Lu, Wen); Li, XL (Li, Xuelong); Tao, DC (Tao, Dacheng)
来源出版物: SIGNAL IMAGE AND VIDEO PROCESSING  卷: 5  期: 3  页: 283-290  DOI: 10.1007/s11760-010-0200-x  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: This paper proposes a new image quality assessment framework which is based on color perceptual model. By analyzing the shortages of the existing image quality assessment methods and combining the color perceptual model, the general framework of color image quality assessment based on the S-CIELAB color space is presented. The S-CIELAB color model, a spatial extension of CIELAB, has an excellent performance for mimicking the perceptual processing of human color vision. This paper incorporates excellent color perceptual characteristics model with the geometrical distortion measurement to assess the image quality. First, the reference and distorted images are transformed into S-CIELAB color perceptual space, and the transformed images are evaluated by existing metric in three color perceptual channels. The fidelity factors of three channels are weighted to obtain the image quality. Experimental results achieved on LIVE database II shows that the proposed methods are in good consistency with human subjective assessment results.
文献类型: Article
作者关键词: Image quality assessment; Color vision; S-CIELAB; Perceptual characteristics
KeyWords Plus: COLOR; VISIBILITY
Web of Science 类别: Engineering, Electrical & Electronic; Imaging Science & Photographic Technology
研究方向: Engineering; Imaging Science & Photographic Technology
IDS 号: 809LG
ISSN: 1863-1703
________________________________________
第 66 条,共 209 条
标题: Overall scheme and on-orbit images of Chang'E-2 lunar satellite CCD stereo camera
作者: Zhao, BC (Zhao BaoChang); Yang, JF (Yang JianFeng); Wen, DS (Wen DeSheng); Gao, W (Gao Wei); Chang, LY (Chang LingYing); Song, ZX (Song ZongXi); Xue, B (Xue Bin); Zhao, W (Zhao Wei)
来源出版物: SCIENCE CHINA-TECHNOLOGICAL SCIENCES  卷: 54  期: 9  页: 2237-2242  DOI: 10.1007/s11431-011-4519-5  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 5
摘要: The goals of engineering and scientific missions for Chang'E-2 lunar satellite require high detection sensitivity and large imaging dynamic range for the onboard CCD cameras. The TDI CCD image sensor was adopted for the two linear CCD stereo cameras for the first time in the lunar reconnaissance of the world. The design argumentation is described in this paper. The analysis shows that the imagers meet the mission requirements. The satellite was launched on 1 October 2010 at zero window. The cameras obtained images of 7 m resolution on the 100 km orbit for the first time on 24 October 2010, and operated once again on 27 October 2010 to take stereo images of the Sinus Iridum with the resolution better than 1.5 m. On the near-moon-arc of 15 kmx100 km elliptical orbit, the images are very clear and rich of grey scales, indicating successful completion of the Chang'E-2 engineering mission. At the present the cameras are acquiring the full lunar surface stereo images with 7 m resolution on the 100 km circular orbit to complete their scientific mission.
文献类型: Article
作者关键词: lunar satellite; Chang'E-2; CCD stereo camera; engineering and scientific target; Sinus Iridum image
Web of Science 类别: Engineering, Multidisciplinary; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: 802VP
ISSN: 1674-7321
________________________________________
第 67 条,共 209 条
标题: Auto-compensation of velocity-height ratio for Chang'E-2 satellite CCD stereo camera
作者: Xue, B (Xue Bin); Zhao, BC (Zhao BaoChang); Yang, JF (Yang JianFeng); Gao, W (Gao Wei); Qiao, WD (Qiao WeiDong); Ma, XL (Ma XiaoLong); Zhang, B (Zhang Bo); Liu, JH (Liu JiaHang); Zhao, W (Zhao Wei); Jing, JJ (Jing JuanJuan)
来源出版物: SCIENCE CHINA-TECHNOLOGICAL SCIENCES  卷: 54  期: 9  页: 2243-2246  DOI: 10.1007/s11431-011-4517-7  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: The TDI-CCD imaging method using auto-compensation of velocity-height ratio (VHR) was applied to Chang'E-2 satellite CCD stereo camera. Factors that influence the image quality of the camera were discussed, among which the mismatch error in VHR was found to be the main cause. An auto-compensation scheme for VHR was developed. The validity and effectiveness were proved by the on-orbit high quality images.
文献类型: Article
作者关键词: Chang'E-2 satellite; CCD stereo camera; TDI-CCD; velocity-height ratio; auto-compensation scheme
KeyWords Plus: MODEL
Web of Science 类别: Engineering, Multidisciplinary; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: 802VP
ISSN: 1674-7321
________________________________________
第 68 条,共 209 条
标题: DESIGN OF LOW-TIMING-JITTER, STABLE PICOSECOND OPTICAL-PULSE SOURCE USING AN UNCOOLED GAIN-SWITCHED FABRY-PEROT SEMICONDUCTOR LASER WITH EXTERNAL CONTINUOUS-WAVE LIGHT INJECTION
作者: Liu, YS (Liu, Yuanshan); Zhang, JG (Zhang, Jian-Guo)
来源出版物: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS  卷: 53  期: 9  页: 2100-2105  DOI: 10.1002/mop.26176  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: This paper presents the design of a low-timing-jitter, stable picosecond optical-pulse source, which is based on a low-cost, uncooled Fabry-Perot (FP) semiconductor laser in the gain-switching operation. The wavelength of the designed laser can be tuned from 1538 to 1554 nm under the condition of external continuous-wave (CW) light injection. The relationship between injection light power and timing jitter or between injection light power and pulse width of this gain-switched laser is studied experimentally. Our results show that the optical pulses with widths about 28 and 19 ps at the repetition frequencies of 2.5 and 5 GHz, respectively, are produced by an uncooled gain-switched FP semiconductor laser with timing jitter <= 600 fs, when the injection power and wavelength of an external CW light are appropriately chosen. The use of a 500-m dispersion-compensation fiber can easily compress the optical pulses from 26 to 7.7 ps. Moreover, the stability of an uncooled gain-switched FP laser is experimentally investigated, and a stable optical-pulse train at 5 GHz can be feasibly produced over 7 h of continuously working. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2100-2105, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26176
文献类型: Article
作者关键词: gain-switched laser; low-timing-jitter optical-pulse source; picosecond pulse generation; uncooled Fabry-Perot laser; external light injection; operation stability
KeyWords Plus: DFB LASER; SIGNAL GENERATION; DIODE; TRANSMISSION; AMPLIFIER; SYSTEMS
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: 790PE
ISSN: 0895-2477
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第 69 条,共 209 条
标题: Mammographic mass segmentation: Embedding multiple features in vector-valued level set in ambiguous regions
作者: Wang, Y (Wang, Ying); Tao, DC (Tao, Dacheng); Gao, XB (Gao, Xinbo); Li, XL (Li, Xuelong); Wang, B (Wang, Bin)
来源出版物: PATTERN RECOGNITION  卷: 44  期: 9  特刊: SI  页: 1903-1915  DOI: 10.1016/j.patcog.2010.08.002  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 10
摘要: Mammographic mass segmentation plays an important role in computer-aided diagnosis systems. It is very challenging because masses are always of low contrast with ambiguous margins, connected with the normal tissues, and of various scales and complex shapes. To effectively detect true boundaries of mass regions, we propose a feature embedded vector-valued contour-based level set method with relaxed shape constraint.
In particular, we initially use the contour-based level set method to obtain the initial boundaries on the smoothed mammogram as the shape constraint. To prevent the contour leaking and meanwhile preserve the radiative characteristics of specific malignant masses, afterward, we relax the obtained shape constraint by analyzing possible valid regions around the initial boundaries. The relaxed shape constraint is then used to design a novel stopping function for subsequent vector-valued level set method. Since texture maps, gradient maps, and the original intensity map can reflect different characteristics of the mammogram, we integrate them together to obtain more accurate segmentation by incorporating the new stopping function into the newly proposed feature embedded vector-valued contour-based level set method.
The experimental results suggest that the proposed feature embedded vector-valued contour-based level set method with relaxed shape constraint can effectively find ambiguous margins of the mass regions. Comparing against existing active contours methods, the new scheme is more effective and robust in detecting complex masses. (C) 2010 Elsevier Ltd. All rights reserved.
文献类型: Article; Proceedings Paper
会议名称: 13th International Conference on Computer Analysis of Images and Patterns
会议日期: SEP 02-04, 2009
会议地点: Munster, GERMANY
作者关键词: Mass segmentation; Computer-aided diagnose; Vector-valued level set; Relaxed shape constraint; Mammograms
KeyWords Plus: COMPUTER-AIDED DIAGNOSIS; DIGITAL MAMMOGRAMS; LESION SEGMENTATION; IMAGE SEGMENTATION; ACTIVE CONTOURS; TUMOR-DETECTION; BREAST-CANCER; CLASSIFICATION; GRADIENT; FILTER
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 780DN
ISSN: 0031-3203
________________________________________
第 70 条,共 209 条
标题: Soliton formation and evolution in passively-mode-locked lasers with ultralong anomalous-dispersion fibers
作者: Liu, XM (Liu, Xueming)
来源出版物: PHYSICAL REVIEW A  卷: 84  期: 2  文献号: 023835  DOI: 10.1103/PhysRevA.84.023835  出版年: AUG 19 2011 
Web of Science 核心合集中的 "被引频次": 37
被引频次合计: 38
摘要: The soliton formation and evolution are numerically and experimentally investigated in passively-mode-locked lasers where pulses encounter ultralong anomalous-dispersion fibers. The pulse formation and evolution in lasers are determined by two balances, namely, nonlinearity and anomalous-dispersion balance and intracavity filtering and self-amplitude modulation balance. It is numerically found that a higher-energy soliton can be split into identical lower-energy multisolitons with exactly the same physical properties. Simulation results show that the separation of neighboring solitons is variational in the temporal domain. The temporal and spectral characteristics of solitons have large variations throughout the laser cavity, qualitatively distinct from the steady state of conventional solitons. The experimental observations confirm the theoretical predictions.
文献类型: Article
KeyWords Plus: NONLINEAR SCHRODINGER-EQUATION; DOPED FIBER; DISSIPATIVE SOLITONS; LOCKING
Web of Science 类别: Optics; Physics, Atomic, Molecular & Chemical
研究方向: Optics; Physics
IDS 号: 809KI
ISSN: 1050-2947
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第 71 条,共 209 条
标题: Coexistence of unequal pulses in a normal dispersion fiber laser
作者: Mao, D (Mao, Dong); Liu, XM (Liu, Xueming); Wang, LR (Wang, Leiran); Lu, H (Lu, Hua); Duan, LN (Duan, Lina)
来源出版物: OPTICS EXPRESS  卷: 19  期: 17  页: 16303-16308  DOI: 10.1364/OE.19.016303  出版年: AUG 15 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 10
摘要: We experimentally demonstrate unequal pulses delivered from an erbium-doped fiber (EDF) laser with net-normal dispersion. Two types of pulses with different durations, energies, and spectra coexist in the same ring cavity. The output spectrum exhibits a broadband base that corresponds to the main pulse and a small rectangular lump that corresponds to the additional satellite pulse. With the enhancement of pump power, the intensity of main pulse almost keeps unchanged while the satellite pulse nearly increases linearly. Based on experimental results, it is indicated that two different pulse shaping mechanisms coexist in laser cavity, where the nonlinear polarization rotation (NPR) and spectral filtering (SF) effect contribute to the formation of main pulse and satellite pulse, respectively. (C) 2011 Optical Society of America
PubMed ID: 21934993
文献类型: Article
KeyWords Plus: NET-NORMAL-DISPERSION; DISSIPATIVE SOLITONS; MODE-LOCKING; RING LASER; GENERATION; OSCILLATOR; DYNAMICS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 807KB
ISSN: 1094-4087
________________________________________
第 72 条,共 209 条
标题: Induced transparency in nanoscale plasmonic resonator systems
作者: Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Mao, D (Mao, Dong); Gong, YK (Gong, Yongkang); Wang, GX (Wang, Guoxi)
来源出版物: OPTICS LETTERS  卷: 36  期: 16  页: 3233-3235  出版年: AUG 15 2011 
Web of Science 核心合集中的 "被引频次": 32
被引频次合计: 33
摘要: An optical effect analogous to electromagnetically induced transparency (EIT) is observed in nanoscale plasmonic resonator systems. The system consists of a slot cavity as well as plasmonic bus and resonant waveguides, where the phase-matching condition of the resonant waveguide is tunable for the generation of an obvious EIT-like coupled resonator-induced transparency effect. A dynamic theory is utilized to exactly analyze the influence of physical parameters on transmission characteristics. The transparency effect induced by coupled resonance may have potential applications for nanoscale optical switching, nanolaser, and slow-light devices in highly integrated optical circuits. (C) 2011 Optical Society of America
PubMed ID: 21847218
文献类型: Article
KeyWords Plus: WAVE-GUIDE FILTERS; OPTICS; CHIP
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 807IT
ISSN: 0146-9592
________________________________________
第 73 条,共 209 条
标题: Parallel two-step phase-shifting microscopic interferometry based on a cube beamsplitter
作者: Gao, P (Gao, Peng); Yao, BL (Yao, Baoli); Min, JW (Min, Junwei); Guo, RL (Guo, Rongli); Zheng, JJ (Zheng, Juanjuan); Ye, T (Ye, Tong)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 18  页: 4136-4140  DOI: 10.1016/j.optcom.2011.04.049  出版年: AUG 15 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: Parallel two-step phase-shifting interferometry for microscopy is presented, and the recording condition for generalized two-step phase-shifting interferometry is discussed. A 45 degrees tilted cube beamsplitter enables to replicate the orthogonally linear polarized object and reference waves into two parallel beams, respectively. As a consequence, two interferograms with quadrature phase shift are obtained along the two beams, and phase reconstructed with an improved algorithm. To reconstruct the phase distribution from the two-step phase-shifting interferograms, a certain recording condition should be satisfied. However, the recording condition has not ever been discussed before. In this paper, the recording condition for the two-step phase-shifting interferometry is derived and that is: the intensity of reference wave should be no less than two times object wave intensity. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Parallel phase-shifting interferometry (PPSI); Simultaneous phase-shifting interferometry (SPSI); Digital holography microscopy (DHM); Two-step phase-shifting interferometry
KeyWords Plus: POINT-DIFFRACTION INTERFEROMETRY; DIGITAL HOLOGRAPHIC MICROSCOPY; SPATIAL COHERENCE; RECONSTRUCTION; POLARIZATION; ELEMENT
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 785LY
ISSN: 0030-4018
________________________________________
第 74 条,共 209 条
标题: Some observations on plasma-assisted combustion enhancement using dielectric barrier discharges
作者: Tang, J (Tang, Jie); Zhao, W (Zhao, Wei); Duan, YX (Duan, Yixiang)
来源出版物: PLASMA SOURCES SCIENCE & TECHNOLOGY  卷: 20  期: 4  文献号: 045009  DOI: 10.1088/0963-0252/20/4/045009  出版年: AUG 2011 
Web of Science 核心合集中的 "被引频次": 6
被引频次合计: 6
摘要: We explore an effective way to promote propane combustion by applying a plasma discharge for efficiency enhancement. A coaxial-cylinder, dielectric barrier discharge is used to activate propane and air before they are mixed with each other and ignited for combustion. The characteristics of the combustion flame are well studied and evaluated by varying various operational parameters. It is found that the combustion process can be enhanced by applying a plasma on either the propane or air stream, and the combustion stability is found to be somewhat sensitive to the lean burning conditions and confined to a relatively narrow operating window. The temperature and spectrum of the flame in the main combustion zone are investigated with a 4 W plasma in the on or off state. The main components are identified, and the possible physical and chemical reaction mechanisms are discussed. A comparative analysis of these spectra and temperatures obtained in the main flame suggests that the energy generated from the 4 W plasma is partially used to heat the reaction gases in the flame, and another part of the energy is used to increase the luminosity, especially for activation of air. We also observe that combustion of high flow rate propane and/or air requires more discharge energy density under certain conditions. A comparison of combustion enhancement through different activation methods in flame blowout tests shows that reactive species derived from activation of air play a more critical role in the blowout limit of propane combustion flame than those generated by activation of propane at low equivalence ratio and propane flow.
文献类型: Article
KeyWords Plus: METHANE DIFFUSION FLAME; IGNITION
Web of Science 类别: Physics, Fluids & Plasmas
研究方向: Physics
IDS 号: 832TE
ISSN: 0963-0252
________________________________________
第 75 条,共 209 条
标题: Ultrawide tunable femtosecond optical parametric oscillator around 1.5 mu m based on high nonlinear photonic crystal fiber
作者: Wen, J (Wen, Jin); Liu, HJ (Liu, Hongjun); Huang, N (Huang, Nan); Sun, QB (Sun, Qibing); Long, HB (Long, Hanbo)
来源出版物: OPTICAL ENGINEERING  卷: 50  期: 8  文献号: 085001  DOI: 10.1117/1.3606497  出版年: AUG 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The modulation instability and the phase-matching condition around the zero dispersion wavelength of the high nonlinear photonic crystal fiber (PCF) is numerically analyzed and simulated. The ultrawide tunable range can be obtained from the fiber optical parametric oscillator and the ultrashort pulse can be generated through choosing the parameters of dispersion coefficient, nonlinear coefficient, and pump power appropriately. The numerical simulation results show that a tunable range as wide as 318 nm has been obtained from the femtosecond PCF optical parametric oscillator, around 1.5 mu m. C (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [ DOI: 10.1117/1.3606497]
文献类型: Article
作者关键词: modulation instability; optical parametric oscillator; ultrashort pulse
KeyWords Plus: SCALAR MODULATION INSTABILITY; MICROSTRUCTURE-FIBER; CONTINUOUS-WAVE; REPETITION-RATE; PULSES; GENERATION; DISPERSION; LASER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 812PX
ISSN: 0091-3286
________________________________________
第 76 条,共 209 条
标题: Hyperspectral Image Compression Technology Research Based on EZW
作者: Wei, JX (Wei Jun-xia); Xiangli, B (Xiangli Bin); Duan, XF (Duan Xiao-feng); Xu, ZH (Xu Zhao-hui); Xue, LJ (Xue Li-jun)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 8  页: 2283-2286  DOI: 10.3964/j.issn.1000-0593(2011)08-2283-04  出版年: AUG 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: Along with the development of hyperspectral remote sensing technology, hyperspectral imaging technology has been applied in the aspect of aviation and spaceflight, which is different from multispectral imaging, and with the band width of nanoscale spectral imaging the target continuously, the image resolution is very high. However, with the increasing number of band, spectral data quantity will be more and more, and these data storage and transmission is the problem that the authors must face. Along with the development of wavelet compression technology, in field of image compression, many people adopted and improved EZW, the present paper used the method in hyperspectral spatial dimension compression, but does not involved the spectrum dimension compression. From hyperspectral image compression reconstruction results, whether from the peak signal-to-noise ratio (PSNR) and spectral curve or from the subjective comparison of source and reconstruction image, the effect is well. If the first compression of image from spectrum dimension is made, then compression on space dimension, the authors believe the effect will be better.
文献类型: Article
作者关键词: Hyperspectral; EZW; PSNR; MSE
KeyWords Plus: CLASSIFICATION
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 804VE
ISSN: 1000-0593
________________________________________
第 77 条,共 209 条
标题: Bessel-Gaussian electron beams of cylindrically symmetric spin polarization
作者: Wang, Y (Wang, Yan); Li, CF (Li, Chun-Fang)
来源出版物: EPL  卷: 95  期: 4  文献号: 44001  DOI: 10.1209/0295-5075/95/44001  出版年: AUG 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: Bessel-Gaussian cylindrically symmetric electron beams in spin polarization are reported for the first time. They are shown to be the eigenstates of total angular momentum in the z-direction. But they are neither the eigenstates of spin nor the eigenstates of orbital angular momentum in that direction. Copyright (C) EPLA, 2011
文献类型: Article
KeyWords Plus: ORBITAL ANGULAR-MOMENTUM; WAVE-EQUATION; GENERATION; CRYSTALS; STATES; LIGHT
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 806ZL
ISSN: 0295-5075
________________________________________
第 78 条,共 209 条
标题: Lossless Data Embedding Using Generalized Statistical Quantity Histogram
作者: Gao, XB (Gao, Xinbo); An, LL (An, Lingling); Yuan, Y (Yuan, Yuan); Tao, DC (Tao, Dacheng); Li, XL (Li, Xuelong)
来源出版物: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY  卷: 21  期: 8  页: 1061-1070  DOI: 10.1109/TCSVT.2011.2130410  出版年: AUG 2011 
Web of Science 核心合集中的 "被引频次": 23
被引频次合计: 24
摘要: Histogram-based lossless data embedding (LDE) has been recognized as an effective and efficient way for copyright protection of multimedia. Recently, a LDE method using the statistical quantity histogram has achieved good performance, which utilizes the similarity of the arithmetic average of difference histogram (AADH) to reduce the diversity of images and ensure the stable performance of LDE. However, this method is strongly dependent on some assumptions, which limits its applications in practice. In addition, the capacities of the images with the flat AADH, e. g., texture images, are a little bit low. For this purpose, we develop a novel framework for LDE by incorporating the merits from the generalized statistical quantity histogram (GSQH) and the histogram-based embedding. Algorithmically, we design the GSQH driven LDE framework carefully so that it: 1) utilizes the similarity and sparsity of GSQH to construct an efficient embedding carrier, leading to a general and stable framework; 2) is widely adaptable for different kinds of images, due to the usage of the divide-and-conquer strategy; 3) is scalable for different capacity requirements and avoids the capacity problems caused by the flat histogram distribution; 4) is conditionally robust against JPEG compression under a suitable scale factor; and 5) is secure for copyright protection because of the safe storage and transmission of side information. Thorough experiments over three kinds of images demonstrate the effectiveness of the proposed framework.
文献类型: Article
作者关键词: Generalized statistical quantity histogram; lossless data embedding; reversibility; video and image watermarking
KeyWords Plus: WATERMARKING; AUTHENTICATION
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: 805SQ
ISSN: 1051-8215
________________________________________
第 79 条,共 209 条
标题: Nonlinear frequency conversion in bismuth-doped tellurite suspended core fiber
作者: Ryasnyanskiy, A (Ryasnyanskiy, Aleksandr); Lin, AX (Lin, Aoxiang); Belwalkar, A (Belwalkar, Amit); Guintrand, C (Guintrand, Cyril); Biaggio, I (Biaggio, Ivan); Toulouse, J (Toulouse, Jean)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 16-17  页: 3977-3979  DOI: 10.1016/j.optcom.2011.04.019  出版年: AUG 1 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We have developed a new kind of tellurite glass with composition 70.5TeO(2)-12ZnO-10Na(2)O-7.5Bi(2)O(3) by conventional melting-quenching techniques. A suspended-core fiber (SCF) with a triangular-shaped core (similar to 2.9 mu m) has been drawn from an extruded perform. Several nonlinear frequency conversion processes are being demonstrated, which point to the potential of such a fiber. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Tellurite glass; Suspended core fiber; Third-harmonic generation; Parametric generation
KeyWords Plus: PHOTONIC-CRYSTAL FIBER; LARGE MODE-AREA; SUPERCONTINUUM GENERATION; GLASS-FIBER; TRANSMISSION; LASER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 781HA
ISSN: 0030-4018
________________________________________
第 80 条,共 209 条
标题: RGB High Brightness LED Modules for Projection Display Application
作者: Peng, CH (Peng, Chenhui); Li, XN (Li, Xiaoning); Zhang, P (Zhang, Pu); Xiong, LL (Xiong, Lingling); Liu, XS (Liu, Xingsheng)
来源出版物: JOURNAL OF DISPLAY TECHNOLOGY  卷: 7  期: 8  页: 448-453  DOI: 10.1109/JDT.2011.2132693  出版年: AUG 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 4
摘要: Light-emitting diodes (LEDs) have numerous advantages, such as long lifetime, large color gamut, small size, and absence of mercury vapor. In recent years, there has been recognition that high brightness LED could be an alternative light source for projection display application. In this work, dielectric compound parabolic concentrators (CPCs) were designed and optimized for multiple-LED array package for projection display application. The performance of rectangular CPC was studied and compared to theoretical simulations. More than 85% light, emitted by multiple-LED arrays, can be collected by the CPC and transmitted within the designed angle. A rectangular CPC was fabricated as the collector and collimator. The CPC was integrated with multiple-LED array package, and RGB high brightness LED modules with rectangular CPCs were fabricated and their performances were characterized.
文献类型: Article
作者关键词: Compound parabolic concentrators (CPCs); light-emitting diodes (LEDs); projection display
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: 784MH
ISSN: 1551-319X
________________________________________
第 81 条,共 209 条
标题: All-optical 40 Gb/s wavelength conversion using hybrid SOI-based MZI and SOAs configuration
作者: Wu, JW (Wu, Jian-Wei); Lee, HS (Lee, Hyun-Shik); Lee, EH (Lee, El-Hang)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 16-17  页: 4000-4006  DOI: 10.1016/j.optcom.2011.04.045  出版年: AUG 1 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, we present a compact combination of silicon-based Mach-Zehnder interferometer (MZI) and semiconductor optical amplifiers (SOAs) to perform all-optical return to zero (RZ)-to-RZ and non-return to zero (NRZ) wavelength conversions at a bit rate of 40 Gb/s. Using the proposed theoretical project, the attractive issue is that converted signals with inverted and noninverted formats can be simultaneously achieved at the same target wavelength. Moreover, both extinction ratio and eye-opening ratio of the converted RZ and NRZ signals can be significantly optimized by judiciously adjusting the system parameters and initial conditions. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Integrated optics; Silicon and semiconductor optical amplifier; waveguides; Wavelength conversion
KeyWords Plus: SILICON WAVE-GUIDES; CROSS-PHASE MODULATION; SINGLE-STAGE; AMPLIFIERS; CONVERTER; AMPLIFICATION; PHOTONICS; PULSES; LIGHT; FIBER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 781HA
ISSN: 0030-4018
________________________________________
第 82 条,共 209 条
标题: Secondary optical lens designed in the method of source-target mapping
作者: Wang, GZ (Wang, Guangzhen); Wang, LL (Wang, Lili); Li, L (Li, Lin); Wang, DD (Wang, Doudou); Zhang, YJ (Zhang, Yajun)
来源出版物: APPLIED OPTICS  卷: 50  期: 21  页: 4031-4036  DOI: 10.1364/AO.50.004031  出版年: JUL 20 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 4
摘要: A secondary optical lens was designed and investigated in three-dimensional (3D) space, which was far more accurate than a two-dimensional space in far-field lighting. The shape of the lens surface was from numerical solutions to a group of equations based on source-target mapping; calculating time was only 1: 6 s. Neglecting absorption and scattering loss, the main results show that, for circular lighting, light efficiency can reach as high as 95%, and uniformity, which is the ratio of the minimum illuminance to average illuminance, is 92.2%. For rectangular lighting, light efficiency can reach 83.6% and uniformity can reach 66.7%. Performance of lenses under different parameters was studied to provide direct references for production and application. (c) 2011 Optical Society of America
PubMed ID: 21772388
文献类型: Article
KeyWords Plus: REFLECTOR DESIGN; ILLUMINATION; IRRADIANCE; DIMENSIONS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 795JN
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 83 条,共 209 条
标题: High average power, strictly all-fiber supercontinuum source with good beam quality
作者: Hu, XH (Hu, Xiaohong); Zhang, W (Zhang, Wei); Yang, Z (Yang, Zhi); Wang, YS (Wang, Yishan); Zhao, W (Zhao, Wei); Li, XH (Li, Xiaohui); Wang, HS (Wang, Hushan); Li, C (Li, Cheng); Shen, DY (Shen, Deyuan)
来源出版物: OPTICS LETTERS  卷: 36  期: 14  页: 2659-2661  出版年: JUL 15 2011 
Web of Science 核心合集中的 "被引频次": 20
被引频次合计: 25
摘要: A 1.05 mu m picosecond pulsed fiber master oscillator power amplifier system delivering an average power of over 100 W was used to pump a 5 m long commercially available photonic crystal fiber and a 49.8 W supercontinuum spanning from around 500 nm to above 1700 nm was generated. Strictly single mode operation of the all-fiber supercontinuum source across the whole spectral range was verified through the quantitative measurement of the beam quality. (C) 2011 Optical Society of America
PubMed ID: 21765500
文献类型: Article
KeyWords Plus: PHOTONIC CRYSTAL FIBERS; PUMPED SUPERCONTINUUM; GENERATION; LASER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 800GE
ISSN: 0146-9592
________________________________________
第 84 条,共 209 条
标题: A Gradient Anodic Oxidation Method for Treating Polyacrylonitrile-Based High-Modulus Carbon Fibers
作者: Hou, YP (Hou, Yongping); Sun, TQ (Sun, Tongqing); Wang, HJ (Wang, Haojing)
来源出版物: JOURNAL OF APPLIED POLYMER SCIENCE  卷: 121  期: 2  页: 1059-1066  DOI: 10.1002/app.33761  出版年: JUL 15 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: We describe a gradient anodic oxidation method. Polyacrylonitrile-based high-modulus carbon fibers were treated by the conventional and gradient anodic oxidation methods. The results show that the carbon fibers treated by the gradient method possessed a more stable tensile strength, larger NaOH uptake, shallower striations, flatter fracture surface of composites, and better interlaminar shear strength compared to those treated by the conventional method. This indicated that the gradient method was more effective in restricting the etching reaction and improving the adhesion between the carbon fibers and matrix, and we give a suggested explanation of the mechanisms. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 1059-1066, 2011
文献类型: Article
作者关键词: electrochemistry; fibers; interfaces; surface modification
KeyWords Plus: POLY(VINYLIDENE FLUORIDE); SURFACE MODIFICATION; EPOXY COMPOSITES; PLASMA TREATMENT; ADHESION; XPS; WETTABILITY; MATRIX; RESIN
Web of Science 类别: Polymer Science
研究方向: Polymer Science
IDS 号: 747XV
ISSN: 0021-8995
________________________________________
第 85 条,共 209 条
标题: Influences of the thickness, misalignment, and dispersion of the Savart polariscope on the optical path difference and spectral resolution in the polarization interference imaging spectrometer
作者: Zhang, CM (Zhang, Chunmin); Zhao, JK (Zhao, Jianke); Sun, Y (Sun, Yao)
来源出版物: APPLIED OPTICS  卷: 50  期: 20  页: 3497-3504  DOI: 10.1364/AO.50.003497  出版年: JUL 10 2011 
Web of Science 核心合集中的 "被引频次": 7
被引频次合计: 7
摘要: After reviewing the spectrum-dividing principle of the Savart polariscope (SP) in the polarization interference imaging spectrometer (PIIS) that we developed, we analyze the influences of the thickness, misalignment, and dispersion of the SP on the optical path difference (OPD). The theoretical expression of the OPD for the misalignment of the SP optical axis is deduced, and the OPD is analyzed when the incident plane is parallel, at 45 degrees, or orthogonal to the principal section of the left plate of the SP. The selective thickness of the single Savart plate is analyzed when it is placed at the ideal and misalignment positions. The influence of dispersion of the SP on the OPD is analyzed when the misalignment error is +/- 1'. The relationships between the OPD and wavelength are simulated and validated with experiments. This work can provide theoretical and practical guidance for the design, calibration, modulation, innovation, experiment, and engineering of the PIIS. (C) 2011 Optical Society of America
PubMed ID: 21743559
文献类型: Article
KeyWords Plus: UPPER ATMOSPHERIC WIND; FOURIER-TRANSFORM; ORIENTATION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 796RI
ISSN: 1559-128X
电子 ISSN: 2155-3165
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第 86 条,共 209 条
标题: Enhancement of transmission efficiency of nanoplasmonic wavelength demultiplexer based on channel drop filters and reflection nanocavities
作者: Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Gong, YK (Gong, Yongkang); Mao, D (Mao, Dong); Wang, LR (Wang, Leiran)
来源出版物: OPTICS EXPRESS  卷: 19  期: 14  页: 12885-12890  DOI: 10.1364/OE.19.012885  出版年: JUL 4 2011 
Web of Science 核心合集中的 "被引频次": 30
被引频次合计: 31
摘要: We propose and numerically investigate a novel kind of nanoscale plasmonic wavelength demultiplexing (WDM) structure based on channel drop filters in metal-insulator-metal waveguide with reflection nanocavities. By using finite-difference time-domain simulations, it is found that the transmission efficiency of the channel drop filter can be significantly enhanced by selecting the proper distance between the drop and reflection cavities. The result can be exactly analyzed by the temporal coupled-mode theory. According to this principle, a nanoscale triple-wavelength demultiplexer with high drop efficiencies is designed. The proposed structure can find more applications for the ultra-compact WDM systems in highly integrated optical circuits. (C) 2011 Optical Society of America
PubMed ID: 21747440
文献类型: Article
KeyWords Plus: SURFACE-PLASMON POLARITON; WAVE-GUIDE FILTERS; METAL; RESONATORS; CAVITY
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 794DU
ISSN: 1094-4087
________________________________________
第 87 条,共 209 条
标题: Laser beam smoothing based on spherical circular grating
作者: Zhao, X (Zhao, Xin); Xie, YJ (Xie, Yongjun)
来源出版物: JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS  卷: 13  期: 7-8  页: 792-796  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: We propose a new method of beam smoothing based on spherical circular grating to reduce the perturbation in near field and focal plane. Our numerical simulation demonstrates that the smoothing effect using circular grating is better than that of 2D-SSD. The new method has potential application in inertial confinement fusion (ICF).
文献类型: Article
作者关键词: Gratings; Lasers; pulsed; phase; Laser beam shaping
KeyWords Plus: DISPERSION
Web of Science 类别: Materials Science, Multidisciplinary; Optics; Physics, Applied
研究方向: Materials Science; Optics; Physics
IDS 号: 820EA
ISSN: 1454-4164
________________________________________
第 88 条,共 209 条
标题: All-optical multicasting based on multi-pump four-wave mixing in photonic crystal fiber
作者: Hui, ZQ (Hui Zhan-Qiang); Zhang, JG (Zhang Jian-Guo)
来源出版物: ACTA PHYSICA SINICA  卷: 60  期: 7  文献号: 074220  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: All-optical multicasting is a key technology of future transparent photonic network, and in this paper it is presented and experimentally demonstrated based on four-wave mixing (FWM) with multi-frequency pump in 100 m dispersion flattened highly nonlinear photon crystal fiber (HNL-PCF). A signal together with double orthogonal pumps is input into the PCF, and four idlers at new frequencies can be generated through degenerate multi-frequency pump FWM processes, which carry the same data information as the input signal and then a 4 x 10 Gbit/s wavelength multicasting has been obtained with a tunable operation wavelength range of 35.2 nm and total channel span of 4.4THz. The optimal conversion efficiency and the optimal Q factor are -22 dB and 5.3, respectively. The system is transparent to both bit rate and modulation format. The advantage of this scheme consists in the ability of bandwidth, and the multicasting channel scalable due to dispersion flattening of PCF is used. Furthermore, it is all optical fiber, compact and robust, which makes it more competitive an well as easily accessible for the uses in practical optical communication systems.
文献类型: Article
作者关键词: all-optical multicasting; multi-pump four-wave mixing (MP-FWM); photonic crystal fiber (PCF)
KeyWords Plus: WAVELENGTH CONVERSION; ELECTROABSORPTION MODULATOR; 40 GB/S; SIGNALS; SINGLE; WAVES; FWM
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 800MZ
ISSN: 1000-3290
________________________________________
第 89 条,共 209 条
标题: Nonparaxial propagation of vectorial hollow Gaussian beams diffracted at an annular aperture
作者: Yang, YJ (Yang, Yuanjie); Li, XF (Li, Xiaofeng); Duan, KL (Duan, Kailiang)
来源出版物: OPTICAL ENGINEERING  卷: 50  期: 7  文献号: 078001  DOI: 10.1117/1.3595864  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: Based on the vectorial Raleigh-Sommerfeld diffraction integral, an analytical propagation equation of vectorial nonparaxial hollow Gaussian beams (HGBs) through an annular aperture is derived. The corresponding closed-forms for a circular aperture, a circular black screen, and unapertured case are given as special cases of the general results. The typical numerical examples are given to illustrate our analytical results. It is shown that the f parameter plays an important role in determining the nonparaxiality of vectorial apertured HGBs. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3595864]
文献类型: Article
作者关键词: nonparaxial propagation; hollow Gaussian beams; annular aperture
KeyWords Plus: PARAXIAL PROPAGATION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 797XZ
ISSN: 0091-3286
________________________________________
第 90 条,共 209 条
标题: Advance in Imaging Spectropolarimeter
作者: Wang, XQ (Wang Xin-quan); Xiangli, B (Xiangli Bin); Huang, M (Huang Min); Hu, L (Hu Liang); Zhou, JS (Zhou Jin-song); Jing, JJ (Jing Juan-juan)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 7  页: 1968-1974  DOI: 10.3964/j.issn.1000-0593(2011)07-1968-07  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Imaging spectropolarimeter (ISP) is a type of novel photoelectric sensor which integrated the functions of imaging, spectrometry and polarimetry. In the present paper, the concept of the ISP is introduced, and the advances in ISP at home and abroad in recent years is reviewed. The principles of ISPs based on novel devices, such as acousto-optic tunable filter (AOTF) and liquid crystal tunable filter (LCTF), are illustrated. In addition, the principles of ISPs developed by adding polarized components to the dispersing-type imaging spectrometer, spatially modulated Fourier transform imaging spectrometer, and computer tomography imaging spectrometer are introduced. Moreover, the trends of ISP are discussed too.
文献类型: Article
作者关键词: Imaging spectropolarimeter; Imaging spectrometer; Imaging polarimeter
KeyWords Plus: LCTF SPECTROPOLARIMETER; EARTH OBSERVATION; SPECTRUM; IMAGER
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 790GD
ISSN: 1000-0593
________________________________________
第 91 条,共 209 条
标题: Study and Simulation of the Intensity Modulation-Fourier Transform Spectropolarimeter
作者: Wang, XQ (Wang Xin-quan); Xiangli, B (Xiangli Bin); Huang, M (Huang Min); Hu, L (Hu Liang); Jing, JJ (Jing Juan-juan)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 7  页: 1980-1984  DOI: 10.3964/j.issn.1000-0593(2011)07-1980-05  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Intensity modulation-Fourier transform spectropolarimetry (IMFTSP) is a novel technology that combines the intensity modulation spectropolarimetry and Fourier transform spectroscopy. The IMFTSP can obtain full Stokes spectropolarimetric parameters simultaneously, and maintains the throughput (Jacquinot) and multiplex (Fellgett) advantages. Yet aside from this, the IMFTSP has the advantage of reducing the complexity of data processing. The data collecting and spectropolarimetric parameters reconstruction processes were analyzed theoretically in this paper, the theoretical formulas are presented, and a whole process mathematical simulation for the IMFTSP system is introduced. The theory analysis and simulation results proved the feasibility of the IMFTSP.
文献类型: Article
作者关键词: Spectropolarimetry; Intensity modularion; Fourier transform spectroscopy
KeyWords Plus: CHANNELED SPECTROPOLARIMETRY; SPECTRUM
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 790GD
ISSN: 1000-0593
________________________________________
第 92 条,共 209 条
标题: Research on Endmember Extraction Algorithm Based on Spectral Classification
作者: Gao, XH (Gao Xiao-hui); Xiangli, B (Xiangli Bin); Wei, RY (Wei Ru-yi); Lu, QB (Lue Qun-bo); Wei, JX (Wei Jun-xia)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 7  页: 1995-1998  DOI: 10.3964/j.issn.1000-0593(2011)07-1995-04  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 2
摘要: Spectral unmixing is an important task for data processing of hyperspectral remote sensing, which is comprised of extracting the pure spectra (endmember) and calculating the abundance value of pure spectra. The most efficient endmember extracting algorithms (EEAs) is designed based on convexity geometry such as pure pixel index (PPI), N-finder algorithm (N-FINDR). Most EEAs choose pure spectra from all pixels of an image so that they have disadvantages like slow processing speed and poor precision. Partial algorithms need reducing the spectral dimension, which results in the difficulty in small target identification. This paper proposed an algorithm that classifies the hyperspetral image into some classes with homogeneous spectra and considers the mean spectra of a class as standard spectra for the class, then extracts pure spectrum from all standard spectra of classes. It reduces computation and the effect of system error, enhancing the speed and precision of endmember extraction. Using the least squares with constraints on spectral extraction and spectral unmixing, by controlling the band average value of the maximum spectral redundant allowance to control the number of endmembers, does not need to reduce the spectral dimension and predetermine the number of endmembers, so compared to N-finder algorithm, such algorithm is more rational.
文献类型: Article
作者关键词: Hyperspectral remote sensing; Spectral unmixing; Spectral redundancy; Spectral classification
KeyWords Plus: HYPERSPECTRAL DATA
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 790GD
ISSN: 1000-0593
________________________________________
第 93 条,共 209 条
标题: Analysis of nanoplasmonic wavelength demultiplexing based on metal-insulator-metal waveguides
作者: Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Gong, YK (Gong, Yongkang); Mao, D (Mao, Dong); Wang, GX (Wang, Guoxi)
来源出版物: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS  卷: 28  期: 7  页: 1616-1621  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 17
被引频次合计: 17
摘要: Nanoplasmonic wavelength demultiplexing (WDM) structures based on metal-insulator-metal waveguides are designed and investigated numerically. The WDM structures possess a series of resonator-based channel drop filters near a bus waveguide. The demultiplexing wavelength of each channel can be tuned by adjusting the geometrical parameters and refractive index of the resonator. The numerical results based on the finite-difference time-domain method can be accurately explained by the resonant theory. Meanwhile, the transmission characteristics of the drop waveguide are influenced by the coupling distance between the resonator and drop/bus waveguides, which can be exactly analyzed by the temporal coupled-mode theory. Additionally, it is found that the drop efficiencies can be improved by a factor of more than 1.8 when a reflection feedback is introduced in the bus waveguide. (c) 2011 Optical Society of America
文献类型: Article
KeyWords Plus: SURFACE-PLASMON POLARITON; NANODISK RESONATORS; DROP FILTERS; REFLECTION; CAVITIES
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 788PW
ISSN: 0740-3224
________________________________________
第 94 条,共 209 条
标题: Experimental study on the imaging of the squeezed state light at 1064 nm
作者: Chen, L (Chen, L.); Bi, SW (Bi, S. W.); Lu, BZ (Lu, B. Z.)
来源出版物: LASER PHYSICS  卷: 21  期: 7  页: 1202-1207  DOI: 10.1134/S1054660X11130056  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: Stable, low noise, infrared squeezed state tight at 1064 nm is generated by utilizing optical parametric down-conversion (OPDC) technique based on periodically poled KTiOPO4 in a optical parametric amplifier (OPA) resonator. A non-classical noise reduction of 2.58 dB below the shot noise is observed through balanced homodyne detection. The squeezed state light is used to set up an imaging system for high-resolution imaging, and it is found that the resolution of image based on the amplitude-squeezed light is 1.26 times larger than that of infrared coherent light under the same intensity. The experimental results indicate that squeezed light is an important non-classical light, which can overcome the coherent laser shot-noise, the classical diffraction limit and limit of quantum noise.
文献类型: Article
KeyWords Plus: OPTICAL-RESONATOR; LASER; GENERATION; PHASE; POLARIZATION; MICROSCOPY; FIBER; ATOM; INTERFEROMETER; DIAGNOSTICS
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 788SE
ISSN: 1054-660X
________________________________________
第 95 条,共 209 条
标题: Dependence of the stability of organic light-emitting diodes on driving mode
作者: Zhang, WW (Zhang WenWen); Wu, ZX (Wu ZhaoXin); Zhang, XW (Zhang XinWen); Liang, SX (Liang ShiXiong); Jiao, B (Jiao Bo); Hou, X (Hou Xun)
来源出版物: CHINESE SCIENCE BULLETIN  卷: 56  期: 21  页: 2210-2214  DOI: 10.1007/s11434-011-4555-3  出版年: JUL 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 6
摘要: We investigated the effects of pulsed current (PC) and direct current (DC) driving modes on the stability of organic light-emitting diodes with and without hole-injection layers (HILs). Two different HIL materials were used: copper phthalocyanine (CuPc) and 4,4',4aEuro(3)-tris(3-methylphenylphenylamino)triphenylamine (m-MDTATA). It was found that the half-lives of devices using PC driving modes were different from those of comparable devices using DC driving modes. For the devices without HILs, with CuPc HILs and with MTDATA HILs, the half-lives of the devices were changed by factors of 1.91, 1.41 and 0.86, respectively, when operated in PC rather than DC driving modes. Our analysis of the electrical characteristics of the corresponding hole-only devices showed that the number of holes injected into devices was greatly reduced by inserting an m-MTDATA layer compared with other designs. The results indicate that different ratios of injected electrons and holes can be obtained in these devices. Moreover, these ratios play a dominant role in the dependence of the stability of the device on the driving mode.
文献类型: Article
作者关键词: organic light-emitting diodes; stability; driving mode; electrons; holes
KeyWords Plus: ELECTROLUMINESCENCE EFFICIENCY; DEVICES; DEGRADATION; INJECTION; MOLECULES
Web of Science 类别: Multidisciplinary Sciences
研究方向: Science & Technology - Other Topics
IDS 号: 785ZK
ISSN: 1001-6538
________________________________________
第 96 条,共 209 条
标题: Generation of rotating intensity blades by superposing optical vortex beams
作者: Yang, DX (Yang, Dexing); Zhao, JH (Zhao, Jinhu); Zhao, T (Zhao, Teng); Kong, LC (Kong, Lingchen)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 14  页: 3597-3600  DOI: 10.1016/j.optcom.2011.03.075  出版年: JUL 1 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: A kind of optical beam with controllable rotating intensity blades is generated by coaxially superposing two optical vortex beams with frequency difference (Delta omega), different topological charges (m(1) and m(2)) and equal amplitude. It is shown theoretically that the number of the blades is determined by the subtraction of topological charges (m(1) - m(2)) and the angular velocity of the rotating pattern is equal to Delta omega/(m(1) - m(2)). In our experiment, the rotating beams were generated by two optical vortex beams with opposite topological charges, where the frequency difference is acquired by a rotating plate glass. The results are quite in accordance with the simulations. (c) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Optical manipulation; Optical spanners; Laser beam combining; Computer holography; Laser beam shaping
KeyWords Plus: ORBITAL ANGULAR-MOMENTUM; BOSE-EINSTEIN CONDENSATE; PARAXIAL LIGHT-BEAMS; PROPAGATION; MANIPULATION; PARTICLES; VORTICES; PHASE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 771RV
ISSN: 0030-4018
________________________________________
第 97 条,共 209 条
标题: Characterization of vector diffraction-free beams
作者: Wang, TT (Wang, Ting-Ting); Yang, SY (Yang, Shuang-Yan); Li, CF (Li, Chun-Fang)
来源出版物: OPTICS LETTERS  卷: 36  期: 12  页: 2342-2344  出版年: JUN 15 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 3
摘要: It is observed that a constant unit vector denoted by I is needed to characterize a complete orthonormal set of vector diffraction-free beams. The previously found diffraction-free beams are shown to be included as special cases. The I-dependence of the longitudinal component of diffraction-free beams is also discussed. (C) 2011 Optical Society of America
PubMed ID: 21686014
文献类型: Article
KeyWords Plus: ELECTROMAGNETIC BEAMS; WAVE-EQUATION; FREE-SPACE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 778RI
ISSN: 0146-9592
________________________________________
第 98 条,共 209 条
标题: Improvement of the performance of the twisted-nematic liquid-crystal display as a phase modulator
作者: Ma, BH (Ma, Baiheng); Yao, BL (Yao, Baoli); Li, Z (Li, Ze); Ye, T (Ye, Tong)
来源出版物: APPLIED OPTICS  卷: 50  期: 17  页: 2588-2593  DOI: 10.1364/AO.50.002588  出版年: JUN 10 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: A twisted-nematic liquid-crystal display (TN-LCD) placed between two linear polarizers (P) generally produces coupled intensity and phase modulations. For the purpose of phase-only modulation, quarter-wave plates (QWPs) are often used in front of or behind the LCD. In this paper, we demonstrate theoretically and experimentally the QWPs' effect on the modulation properties of the TN-LCD based on the general Jones matrix descriptions for all the devices, which circumvents the inconvenience of the traditional method on the basis of the TN-LCD's internal parameters. We prove that the phase modulation depth of the TN-LCD can be further increased in the configuration of P-1-QWP(1)-LCD-QWP(2)-P-2 with each component properly oriented, provided that the mean intensity transmission is decreased to a lower level. By observing the diffracted patterns of the Ronchi phase grating or blazed grating addressed onto the TN-LCD, we verify the validity of the proposed method. Improved reconstructed image quality from the kinoform loaded on the TN-LCD is obtained in this configuration. This approach is valuable when the TN-LCD is employed as a phase modulator, especially for the modern, thinner TN-LCD. (C) 2011 Optical Society of America
PubMed ID: 21673760
文献类型: Article
KeyWords Plus: SPATIAL LIGHT MODULATORS; JONES MATRIX-METHOD; ONLY MODULATION; POLARIZATION STATES; TELEVISION; DEVICES
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 780QG
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 99 条,共 209 条
标题: Slightly off-axis interferometry for microscopy with second wavelength assistance
作者: Han, JH (Han, Junhe); Gao, P (Gao, Peng); Yao, BL (Yao, Baoli); Gu, YZ (Gu, Yuzong); Huang, MJ (Huang, Mingju)
来源出版物: APPLIED OPTICS  卷: 50  期: 17  页: 2793-2798  DOI: 10.1364/AO.50.002793  出版年: JUN 10 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Slightly off-axis interferometry for microscopy has been performed, where the dc term of the interferogram is suppressed by the object wave in another wavelength. One wavelength of the laser beam (red light) is used to generate the slightly off-axis interferogram, while the second wavelength (blue light) is employed to measure the transmittance of the specimen. Both the red light and blue light are recorded simultaneously by a color CCD camera and can be separated without cross talk via the red-green-blue components. The dc term of the slightly off-axis interferogram of red light is suppressed with the object wave of blue light. As a consequence, the requirement on the off-axis angle between the object and reference waves is relaxed as well as the requirement on the resolving power of CCD camera. (C) 2011 Optical Society of America
PubMed ID: 21673785
文献类型: Article
KeyWords Plus: DIGITAL HOLOGRAPHIC MICROSCOPY; PHASE-SHIFTING INTERFEROMETRY; ZERO-ORDER; NUMERICAL RECONSTRUCTION; IMAGE; COMPENSATION; SUPPRESSION; DYNAMICS; SPECTRUM
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 780QG
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 100 条,共 209 条
标题: X-ray photon-counting detector based on a micro-channel plate for pulsar navigation
作者: Chen, BM (Chen, Baomei); Zhao, BS (Zhao, Baosheng); Hu, HJ (Hu, Huijun); Yan, QR (Yan, Qiurong); Sheng, LZ (Sheng, Lizhi)
来源出版物: CHINESE OPTICS LETTERS  卷: 9  期: 6  文献号: 060401  DOI: 10.3788/COL201109.060401  出版年: JUN 10 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The pulse time of arrival (TOA) is a determining parameter for accurate timing and positioning in X-ray pulsar navigation. The pulse TOA can be calculated by comparing the measured arrival time with the predicted arrival time of the X-ray pulse for pulsar. In this study, in order to research the measurement of pulse arrival time, an experimental system is set up. The experimental system comprises a simulator of the X-ray pulsar, an X-ray detector, a time-measurement system, and a data-processing system. An X-ray detector base is proposed on the basis of the micro-channel plate (MCP), which is sensitive to soft X-ray in the 1-10 keV band. The MCP-based detector, the structure and principle of the experimental system, and results of the pulse profile are described in detail. In addition, a discussion of the effects of different X-ray pulse periods and the quantum efficiency of the detector on pulse-profile signal-to-noise ratio (SNR) is presented. Experimental results reveal that the SNR of the measured pulse profile becomes enhanced as the quantum efficiency of the detector increases. The SNR of the pulse profile is higher when the period of the pulse is smaller at the same integral.
文献类型: Article
KeyWords Plus: SYSTEM; CSI
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 778BJ
ISSN: 1671-7694

第 101 条,共 209 条
标题: STRUCTURAL DEPENDENCE OF THIRD-ORDER OPTICAL NONLINEARITY OF GeS2-Ga2S3-AgX (X=Cl, Br, I) CHALCOHALIDE GLASSES
作者: Zheng, X (Zheng, X.); Tao, H (Tao, H.); Cheng, F (Cheng, F.); Guo, H (Guo, H.); Lin, C (Lin, C.); Zhao, X (Zhao, X.)
来源出版物: CHALCOGENIDE LETTERS  卷: 8  期: 6  页: 371-376  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: GeS2-Ga2S3-AgX (X=Cl, Br, I) chalcohalide glasses were prepared and their microstructures were investigated by Raman scattering method. Third-order optical nonlinearities were also characterized utilizing the Z-scan method at the wavelength of 800nm. The halogens compositional dependences of third-order optical nonlinearities of these glasses were discussed from the structural point of view. Among the different additives of silver halides, AgBr was demonstrated to have largest contribution to a larger n(2) and smaller FOM simultaneously in the studied glass system, which indicating that Br-containing chalcohalide glasses would be more suitable for the application in all-optical switching devices.
文献类型: Article
作者关键词: Chalcohalide glasses; Raman spectroscopy; Z-scan; Nonlinear optics
KeyWords Plus: CHALCOGENIDE GLASSES; SYSTEM
Web of Science 类别: Materials Science, Multidisciplinary; Physics, Applied
研究方向: Materials Science; Physics
IDS 号: 822GE
ISSN: 1584-8663
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第 102 条,共 209 条
标题: Imaging properties of a tetra wedge readout
作者: Liu, YA (Liu Yong-An); Yan, QR (Yan Qiu-Rong); Sai, XF (Sai Xiao-Feng); Wei, YL (Wei Yong-Lin); Sheng, LZ (Sheng Li-Zhi); Yang, H (Yang Hao); Hu, HJ (Hu Hui-Jun); Zhao, BS (Zhao Bao-Sheng)
来源出版物: CHINESE PHYSICS B  卷: 20  期: 6  文献号: 068503  DOI: 10.1088/1674-1056/20/6/068503  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The decoding principle of a tetra wedge anode, which is a development of the wedge and strip anode, is described. The influence of charge cloud size on decoding accuracy is studied using the Monte Carlo method. Simulation results show that the decoding error is large when the size of charge clouds collected by the anode is small. Thus, the charge clouds collected by the tetra wedge anode should reach a necessary size to ensure accurate decoding. Finally, using the ultraviolet photon counting imaging system, the linearity and the spatial resolution of the system are tested. Experimental results show that the system has a good linearity and the spatial resolution is better than 100 mu m.
文献类型: Article
作者关键词: detectors; photon counting imaging; tetra wedge anode; microchannel plate
KeyWords Plus: STRIP ANODES; PHOTON; DETECTORS; PARTICLE
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 774LV
ISSN: 1674-1056
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第 103 条,共 209 条
标题: Evolution of dissipative-soliton laser from molecule to multipulse
作者: Liu, XM (Liu, X. M.); Duan, LN (Duan, L. N.); Mao, D (Mao, D.); Wang, LR (Wang, L. R.)
来源出版物: LASER PHYSICS  卷: 21  期: 6  页: 1085-1091  DOI: 10.1134/S1054660X1111020X  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: We report on the evolution of dissipative-soliton laser from single pulse to soliton molecule, lastly to multiple pulses. The experimental observations show that the pulse separation of soliton molecules is oscillating stochastically. It is found that the proposed fiber laser delivers pulses from a soliton to a soliton molecule, two solitons, a soliton molecule together with a soliton, and three solitons, respectively, when, the pump strength is enhanced gradually.
文献类型: Article
KeyWords Plus: ERBIUM-DOPED FIBER; PHOTONIC-CRYSTAL FIBER; NET-NORMAL-DISPERSION; ALL-FIBER; ENERGY QUANTIZATION; OSCILLATOR
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 775TL
ISSN: 1054-660X
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第 104 条,共 209 条
标题: Ytterbium doped all-fiber-path all-normal dispersion mode-locked laser based on semiconductor saturable mirror
作者: Lian, FQ (Lian, F. Q.); Fan, ZW (Fan, Zh. W.); Wang, XF (Wang, X. F.); Huang, YT (Huang, Y. T.); Huang, K (Huang, K.); Ma, YF (Ma, Y. F.); Niu, G (Niu, G.); Li, XH (Li, X. H.); Yu, J (Yu, J.)
来源出版物: LASER PHYSICS  卷: 21  期: 6  页: 1103-1107  DOI: 10.1134/S1054660X11110181  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, we describe a compact all-fiber-path picosecond pulse based on Ytterbium doped fiber oscillator. A home-made novel SESAM mounted on fiber is reported, by which stable mode locking is obtained. The SESAM possesses the low saturation flux 20 mu J/cm(2) (versus prior low saturation flux 32 mu J/cm(2)), which effectively reduces the pump power threshold of mode locking. The fiber laser generates 15 ps pulse trains without a dispersive delay line or anomalous dispersion in the cavity. Mode locking pulse with 30 MHz basic repetition-rate was produced, with 10-30 mW scale average output power at 1064 nm. Through 60 h of uninterrupted laser operating, mode locking is steady as ever.
文献类型: Article
KeyWords Plus: LOW-REPETITION-RATE; BRAGG-GRATINGS; CRYSTAL FIBER; OUTPUT POWER; PULSE; POLARIZATION; NM
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 775TL
ISSN: 1054-660X
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第 105 条,共 209 条
标题: Giant Birefringence of Periodic Dielectric Waveguides
作者: Zhang, WF (Zhang, Wenfu); Liu, JH (Liu, Jihong); Huang, WP (Huang, Wei-Ping); Zhao, W (Zhao, Wei)
来源出版物: IEEE PHOTONICS JOURNAL  卷: 3  期: 3  页: 512-520  DOI: 10.1109/JPHOT.2011.2154319  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: The giant (Delta n > 1.5) and broadband achromatic birefringence is realized by periodic dielectric waveguides (PDWs), which benefit from low loss transmission, compact size, and simple structure. Based on the PDW, ultrabroadband achromatic (> 100 nm), low-order ultracompact (< lambda), and ultrahigh-order (500th order) wave plates are designed successfully.
文献类型: Article
作者关键词: Subwavelength structures; nanostructures; photonic crystals; waveguide devices; waveguides
KeyWords Plus: TRANSMISSION CHARACTERISTICS; MODES
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: 773PD
ISSN: 1943-0655
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第 106 条,共 209 条
标题: Fabrication and characterization of Yb3+-doped gain-guided index-antiguided fiber with D-shaped inner cladding
作者: Li, WN (Li, Weinan); Lu, M (Lu, Min); Yang, Z (Yang, Zhi); Guo, HT (Guo, Haitao); Wang, PF (Wang, Pengfei); Peng, B (Peng, Bo)
来源出版物: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS  卷: 28  期: 6  页: 1498-1501  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 4
摘要: Yb(3+)doped gain-guided index-antiguided fibers based on phosphate glasses are drawn using the rod-in-tube technique. These fibers have a circular core with 200 mu m diameter and a D-shaped inner cladding with a 630/480 mu m diameter for the longer/shorter axis. The negative index profile is present in these fibers, in which the core index of refraction is 0.019% lower than that of the inner cladding. Moreover, their laser amplifier characteristics are experimentally demonstrated, and the method of further improvement in laser performance is suggested. (C) 2011 Optical Society of America
文献类型: Article
KeyWords Plus: LASER; ABSORPTION; CORE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 773NS
ISSN: 0740-3224
________________________________________
第 107 条,共 209 条
标题: Semisupervised Dimensionality Reduction and Classification Through Virtual Label Regression
作者: Nie, FP (Nie, Feiping); Xu, D (Xu, Dong); Li, XL (Li, Xuelong); Xiang, SM (Xiang, Shiming)
来源出版物: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS  卷: 41  期: 3  页: 675-685  DOI: 10.1109/TSMCB.2010.2085433  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 9
被引频次合计: 9
摘要: Semisupervised dimensionality reduction has been attracting much attention as it not only utilizes both labeled and unlabeled data simultaneously, but also works well in the situation of out-of-sample. This paper proposes an effective approach of semisupervised dimensionality reduction through label propagation and label regression. Different from previous efforts, the new approach propagates the label information from labeled to unlabeled data with a well-designed mechanism of random walks, in which outliers are effectively detected and the obtained virtual labels of unlabeled data can be well encoded in a weighted regression model. These virtual labels are thereafter regressed with a linear model to calculate the projection matrix for dimensionality reduction. By this means, when the manifold or the clustering assumption of data is satisfied, the labels of labeled data can be correctly propagated to the unlabeled data; and thus, the proposed approach utilizes the labeled and the unlabeled data more effectively than previous work. Experimental results are carried out upon several databases, and the advantage of the new approach is well demonstrated.
PubMed ID: 21118781
文献类型: Article
作者关键词: Dimensionality reduction; label propagation; label regression; semisupervised learning; subspace learning
KeyWords Plus: REGULARIZED DISCRIMINANT-ANALYSIS; FACE RECOGNITION; FRAMEWORK; ILLUMINATION; POSE; PCA
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics
研究方向: Automation & Control Systems; Computer Science
IDS 号: 765UP
ISSN: 1083-4419
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第 108 条,共 209 条
标题: Nanoplasmonic triple-wavelength demultiplexers in two-dimensional metallic waveguides
作者: Lu, H (Lu, H.); Liu, XM (Liu, X. M.); Wang, LR (Wang, L. R.); Mao, D (Mao, D.); Gong, YK (Gong, Y. K.)
来源出版物: APPLIED PHYSICS B-LASERS AND OPTICS  卷: 103  期: 4  页: 877-881  DOI: 10.1007/s00340-011-4525-0  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 11
被引频次合计: 11
摘要: A novel kind of plasmonic wavelength demultiplexers (WDMs) based on two-dimensional metal-insulator-metal waveguides with side coupled nanocavities (SCNCs) is proposed and numerically investigated. The WDMs contain three waveguide output channels, each of which functions as a dual-stopband plasmonic filter. The demultiplexing wavelengths can be tuned by controlling the lengths and widths of SCNCs. The finite-difference time-domain results can be accurately analyzed by the resonant theory of nanocavity. Our structures have important potential applications for design of WDM systems in highly integrated optical circuits.
文献类型: Article
KeyWords Plus: SURFACE-PLASMON POLARITON; NANODISK RESONATORS; FILTERS; PROPAGATION; DESIGN; BEAM
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 782GL
ISSN: 0946-2171
________________________________________
第 109 条,共 209 条
标题: Arbitrary ROI-based wavelet video coding
作者: Lan, XG (Lan, Xuguang); Zheng, NN (Zheng, Nanning); Ma, W (Ma, Wen); Yuan, Y (Yuan, Yuan)
来源出版物: NEUROCOMPUTING  卷: 74  期: 12-13  页: 2114-2122  DOI: 10.1016/j.neucom.2011.01.012  出版年: JUN 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: This paper presents a novel arbitrary shape region of interest (ROI) coding for scalable wavelet video codec. The motion information of the ROIs is estimated by macro block padding and polygon matching. The derived motion vectors are set as the motion trajectory of the samples to generate a one-dimensional temporal signal. This signal is then filtered to reduce the temporal redundancy using motion compensated temporal filtering for arbitrary shape ROI. Compared to traditional non-ROI coding, the reconstructed quality of the ROI coding can be significantly improved at low bit-rates. The efficiency of motion compensated temporal filtering (MCTF) based on arbitrary ROI is also compared with that of the video object coding in MPEG-4. Based on large number of experiments, the ability of the MCTF to reduce the temporal redundancy is demonstrated as better than (or at least comparable to) that of MPEG-4. (C) 2011 Published by Elsevier B.V.
文献类型: Article
作者关键词: ROI; Scalable video coding; Wavelet
KeyWords Plus: BIT ALLOCATION; COMPRESSION; H.264/AVC
Web of Science 类别: Computer Science, Artificial Intelligence
研究方向: Computer Science
IDS 号: 781FH
ISSN: 0925-2312
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第 110 条,共 209 条
标题: Highly flexible all-optical metamaterial absorption switching assisted by Kerr-nonlinear effect
作者: Gong, YK (Gong, Yongkang); Li, ZY (Li, Zhiyuan); Fu, JX (Fu, Jinxin); Chen, YH (Chen, Yuhui); Wang, GX (Wang, Guoxi); Lu, H (Lu, Hua); Wang, LR (Wang, Leirang); Liu, XM (Liu, Xueming)
来源出版物: OPTICS EXPRESS  卷: 19  期: 11  页: 10193-10198  DOI: 10.1364/OE.19.010193  出版年: MAY 23 2011 
Web of Science 核心合集中的 "被引频次": 24
被引频次合计: 25
摘要: A three-dimensional metamaterial nanostructure for realizing all-optical absorption switching is proposed and investigated. The structure consists of dual metallic layers for allowing near-perfect absorption due to electric and magnetic resonances, and a nonlinear Kerr-dielectric layer for actively manipulating the nanostructure absorption. The finite-difference time-domain simulation results demonstrate that, by adjusting the incident optical intensity, the metamaterial absorption can be flexibly tuned from near unity to zero. The all-optical absorption switching structure can find potential applications in actively integrated photonic circuits for thermal sensing, photo detecting, and optical imaging. (C)2011 Optical Society of America
PubMed ID: 21643277
文献类型: Article
KeyWords Plus: PLASMONICS; SCATTERING; ABSORBER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 767JN
ISSN: 1094-4087
________________________________________
第 111 条,共 209 条
标题: Multi-channel plasmonic waveguide filters with disk-shaped nanocavities
作者: Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Gong, YK (Gong, Yongkang); Wang, LR (Wang, Leiran); Mao, D (Mao, Dong)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 10-11  页: 2613-2616  DOI: 10.1016/j.optcom.2011.01.046  出版年: MAY 15 2011 
Web of Science 核心合集中的 "被引频次": 18
被引频次合计: 18
摘要: A kind of multi-channel plasmonic filters based on metal-insulator-metal waveguides with disk-shaped nanocavities is proposed and numerically investigated. By calculating the resonant mode of disk-shaped nanocavity, it is found that the radius and refractive index of the nanocavity effectively control the resonance wavelength, which is consistent with the results obtained by finite-difference time-domain method. The characteristics of resonance spectra are influenced by the gap width between the cavity and waveguide, as can be exactly analyzed by temporal coupled mode theory. In addition, multi-channel plasmonic filters are achieved by increasing the number of nanocavity. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Surface plasmon polaritons; Integrated optics devices; Wavelength filtering devices
KeyWords Plus: METAL; POLARITON; GRATINGS; CAVITY; PROPAGATION; RESONATORS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 744XN
ISSN: 0030-4018
________________________________________
第 112 条,共 209 条
标题: The tempo-spatially modulated polarization atmosphere Michelson interferometer
作者: Zhang, CM (Zhang, ChunMin); Zhu, HC (Zhu, HuaChun); Zhao, BC (Zhao, Baochang)
来源出版物: OPTICS EXPRESS  卷: 19  期: 10  页: 9626-9635  DOI: 10.1364/OE.19.009626  出版年: MAY 9 2011 
Web of Science 核心合集中的 "被引频次": 15
被引频次合计: 16
摘要: A space-based tempo-spatially modulated polarization atmosphere Michelson interferometer (TSMPAMI) is described. It uses the relative movement between the TSMPAMI and the measured target to change optical path difference. The acquisition method of interferogram is presented. The atmospheric temperatures and horizontal winds can be derived from the optical observations. The measurement errors of the winds and temperatures are discussed through simulations. In the presence of small-scale structures of the atmospheric fields, the errors are found to be significantly influenced by the mismatch of the scenes observed by the adjacent CCD sub-areas aligned along the orbiter's track during successive measurements due to the orbital velocity and the exposure time. For most realistic conditions of the orbit and atmosphere, however, the instrument is proven suitable for measuring the atmospheric parameters. (C) 2011 Optical Society of America
PubMed ID: 21643221
文献类型: Article
KeyWords Plus: WIND-IMAGING INTERFEROMETER; GRAVITY-WAVES
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 762OV
ISSN: 1094-4087
________________________________________
第 113 条,共 209 条
标题: Multiple responses of TPP-assisted near-perfect absorption in metal/Fibonacci quasiperiodic photonic crystal
作者: Gong, YK (Gong, Yongkang); Liu, XM (Liu, Xueming); Wang, LR (Wang, Leiran); Lu, H (Lu, Hua); Wang, GX (Wang, Guoxi)
来源出版物: OPTICS EXPRESS  卷: 19  期: 10  页: 9759-9769  DOI: 10.1364/OE.19.009759  出版年: MAY 9 2011 
Web of Science 核心合集中的 "被引频次": 13
被引频次合计: 13
摘要: Absorption properties in one-dimensional quasiperiodic photonic crystal composed of a thin metallic layer and dielectric Fibonacci multilayers are investigated. It is found that a large number of photonic stopbands can occur at the dielectric Fibonacci multilayers. Tamm plasmon polaritons (TPPs) with the frequencies locating at each photonic stopband are excited at the interface between the metallic layer and the dielectric layer, leading to almost perfect absorption for the energy of incident wave. By adjusting the length of dielectric layer with higher refractive-index or the Fibonacci order, the number of absorption peaks can be tuned effectively and enlarged significantly. (C) 2011 Optical Society of America
PubMed ID: 21643233
文献类型: Article
KeyWords Plus: DIELECTRIC MULTILAYERS; LIGHT WAVES; ABSORBER; LOCALIZATION; REFLECTION; FILM
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 762OV
ISSN: 1094-4087
________________________________________
第 114 条,共 209 条
标题: Controllable Goos-Hanchen shifts and spin beam splitter for ballistic electrons in a parabolic quantum well under a uniform magnetic field
作者: Chen, X (Chen, Xi); Lu, XJ (Lu, Xiao-Jing); Wang, Y (Wang, Yan); Li, CF (Li, Chun-Fang)
来源出版物: PHYSICAL REVIEW B  卷: 83  期: 19  文献号: 195409  DOI: 10.1103/PhysRevB.83.195409  出版年: MAY 4 2011 
Web of Science 核心合集中的 "被引频次": 12
被引频次合计: 12
摘要: The quantum Goos-Hanchen shift for ballistic electrons is investigated in a parabolic potential well under a uniform vertical magnetic field. It is found that the Goos-Hanchen shift can be negative as well as positive, and becomes zero at transmission resonances. The beam shift depends not only on the incident energy and incidence angle, but also on the magnetic field and Landau quantum number. Based on these phenomena, we propose an alternative way to realize the spin beam splitter in the proposed spintronic device, which can completely separate spin-up and spin-down electron beams by negative and positive Goos-Hanchen shifts.
文献类型: Article
KeyWords Plus: TOTAL REFLECTION; DISPLACEMENT; REFRACTION; POSITION; BARRIER; MATTER
Web of Science 类别: Physics, Condensed Matter
研究方向: Physics
IDS 号: 759GX
ISSN: 1098-0121
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第 115 条,共 209 条
标题: Comment on "Optical Orbital Angular Momentum from the Curl of Polarization"
作者: Yan, SH (Yan, Shaohui); Yao, BL (Yao, Baoli); Lei, M (Lei, Ming)
来源出版物: PHYSICAL REVIEW LETTERS  卷: 106  期: 18  文献号: 189301  DOI: 10.1103/PhysRevLett.106.189301  出版年: MAY 4 2011 
Web of Science 核心合集中的 "被引频次": 6
被引频次合计: 6
PubMed ID: 21635134
文献类型: Editorial Material
KeyWords Plus: LIGHT
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 759GQ
ISSN: 0031-9007
________________________________________
第 116 条,共 209 条
标题: Synthesis of a side chain conjugated polythiophene copolymer and its photovoltaic property
作者: Gao, C (Gao, Chao); Qu, B (Qu, Bo); Jiang, ZL (Jiang, Zhongliang); Tian, D (Tian, Di); Liu, HL (Liu, Hongli); Chen, ZJ (Chen, Zhijian); Xiao, LX (Xiao, Lixin); Gong, QH (Gong, Qihuang)
来源出版物: SYNTHETIC METALS  卷: 161  期: 9-10  页: 864-868  DOI: 10.1016/j.synthmet.2011.02.014  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: A new soluble polythiophene copolymer with phenylene-vinylene conjugated side chain (PEHOPVTh-Th) was synthesized. Polymer photovoltaic solar cells using PEHOPVTh-Th as donor and [6,6]-phenyl-C61-butyric acid methyl ester (PC(61)BM) as acceptor was demonstrated. The absorption spectrum of the PEHOPVTh-Th showed strong absorption in the visible region and a 55 nm red-shift in comparison with that of its homopolymer (PEHOPVTh). By adjusting the ratio of PEHOPVTh-Th to PC(61)BM, the polymer solar cells based on PEHOPVTh-Th showed a power conversion efficiency of 0.37% under 100 mW/cm(2) AM 1.5G simulated sunlight when the weight ratio of the polymer to PC(61)BM equals to 1:3. (C) 2011 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Photovoltaic cells; Bulk-heterojunction; Side chain conjugated polymer; Polythiophene
KeyWords Plus: POLYMER SOLAR-CELLS; EFFICIENCY; NETWORK; DONOR
Web of Science 类别: Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer Science
研究方向: Materials Science; Physics; Polymer Science
IDS 号: 780CT
ISSN: 0379-6779
________________________________________
第 117 条,共 209 条
标题: Study of non-classical light imaging technology
作者: Chen, MR (Chen, Ming-rui); Bi, SW (Bi, Si-wen); Dou, XB (Dou, Xi-bo); Liu, WY (Liu, Wang-yun)
来源出版物: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT  卷: 637  页: S130-S133  DOI: 10.1016/j.nima.2010.02.039  增刊: 1  出版年: MAY 1 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Non-classical light that generates through the optical parametric down-conversion process by using an optical parametric oscillator is introduced, and the imaging system based on the light is built. The characteristics of the light and the spatial resolution of the image are studied. The light irradiates directly on the object plate, producing a mass of signal photons, then the signal photons are collected by the charge-coupled device. The output electrical signal is collected by a high-speed data collection card and processed with software. Finally, the object image is acquired, and its revised image is obtained by image processing. The results indicate that the resolution of the image based on the non-classical infrared light is 1.43 times that of infrared coherent light. The non-classical light can be widely used for high-resolution imaging, spectrum analysis, and micro-biological sample detection. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Imaging technology; Non-classical light; High-resolution; Parametric down-conversion
KeyWords Plus: SQUEEZED-LIGHT; QUANTUM; TELEPORTATION
Web of Science 类别: Instruments & Instrumentation; Nuclear Science & Technology; Physics, Particles & Fields; Spectroscopy
研究方向: Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
IDS 号: 774WD
ISSN: 0168-9002
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第 118 条,共 209 条
标题: Preparation of a new type of high-resolution light source
作者: Dou, XB (Dou, X. B.); Chen, X (Chen, X.); Bi, SW (Bi, S. W.); Liu, WY (Liu, W. Y.); Chen, MR (Chen, M. R.); Chen, L (Chen, L.)
来源出版物: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT  卷: 637  页: S134-S136  DOI: 10.1016/j.nima.2010.02.040  增刊: 1  出版年: MAY 1 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The generation of a new type of high-resolution non-classical light source with a wavelength of 1064 nm is demonstrated experimentally. A periodically poled KTiOPO4 (PPKTP) crystal is installed in a continuous-wave optical parametric amplifier (OPA), which is pumped by a 532 am laser and seeded by a weak 1064 am laser. The optical parametric down-conversion process is activated in the OPA and generates a non-classical optical field at a wavelength of 1064 nm. The partial squeezed spectrum is pre-detected by a homodyne detection setup. The experiment demonstrates that the resolution of the non-classical optical field is 1.43 times that of the classical optical field. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Optical parametric oscillator; Homodyne detection system; High-resolution
KeyWords Plus: 2ND-HARMONIC GENERATION; GREEN
Web of Science 类别: Instruments & Instrumentation; Nuclear Science & Technology; Physics, Particles & Fields; Spectroscopy
研究方向: Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
IDS 号: 774WD
ISSN: 0168-9002
________________________________________
第 119 条,共 209 条
标题: Theoretical study and experimental scheme for the generation of a 1064-nm continuous variable entangled light source with quasi-phase-matching PPKTP crystal
作者: Liu, WY (Liu, W. Y.); Bi, SW (Bi, S. W.)
来源出版物: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT  卷: 637  页: S153-S157  DOI: 10.1016/j.nima.2010.02.045  增刊: 1  出版年: MAY 1 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: Beginning from Maxwell's equations, various factors required for the non-degenerate optical parametric amplifier (NOPA) to operate are considered step by step. Analytic expressions are obtained, generated from the experimental parameters and through the numerical simulation of the quantum-correlated spectrum between the signal and the idler modes from the NOPA operating below threshold. On this basis, an experimental program is designed for the generation of a 1064-nm continuous variable entanglement light source with a quasi-phase-matching periodical polarized KTiOPO(4) (PPKTP) crystal through a below-threshold optical parametric down-conversion process. This will play a crucial role in subsequent experiments. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Experimental scheme; Continuous variable entanglement light source; Quasi-phase-matching PPKTP crystal; Optical parametric down-conversion process
KeyWords Plus: PODOLSKY-ROSEN CHANNELS; QUANTUM TELEPORTATION; COMMUNICATION; DIFFRACTION; STATE
Web of Science 类别: Instruments & Instrumentation; Nuclear Science & Technology; Physics, Particles & Fields; Spectroscopy
研究方向: Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
IDS 号: 774WD
ISSN: 0168-9002
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第 120 条,共 209 条
标题: Spatial diagnostics of 532-nm laser-induced aluminum plasma
作者: Luo, WF (Luo, W. F.); Zhao, XX (Zhao, X. X.); Sun, QB (Sun, Q. B.); Gao, CX (Gao, C. X.); Tang, J (Tang, J.); Zhao, W (Zhao, W.)
来源出版物: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT  卷: 637  页: S158-S160  DOI: 10.1016/j.nima.2010.02.046  增刊: 1  出版年: MAY 1 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: Spatial characteristics of the plasma generated by 532-nm Nd:YAG laser irradiation of aluminum alloy in air were studied. The electron density inferred by measuring the Stark broadened line profile of Al II at 281.62 nm decreases with increasing distance from the target surface. The electron temperature was determined by using the Boltzmann plot method. Due to thermal conduction towards the solid target and radiative cooling of the plasma, as well as conversion of thermal energy to kinetic energy, the electron temperature decreases both at the plasma edge and close to the target surface. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: LIBS; Plasma; Emission spectroscopy
KeyWords Plus: INDUCED BREAKDOWN SPECTROSCOPY; PARAMETERS; DEPOSITION
Web of Science 类别: Instruments & Instrumentation; Nuclear Science & Technology; Physics, Particles & Fields; Spectroscopy
研究方向: Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
IDS 号: 774WD
ISSN: 0168-9002
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第 121 条,共 209 条
标题: Biased electric field analysis of a photoconductive antenna for terahertz generation
作者: Yang, J (Yang, Jian); Fan, WH (Fan, Wenhui); Xue, B (Xue, Bing)
来源出版物: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT  卷: 637  页: S165-S167  DOI: 10.1016/j.nima.2010.02.048  增刊: 1  出版年: MAY 1 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The development of terahertz (THz) science has been ongoing for decades. As such, the generation and detection of THz radiation tend to be advanced. Currently, there are two main approaches to detect THz radiation: free-space electro-optic sampling (FS-EOS) and photoconductive (PC) sampling. Among the generations, the photoconductive effect is significant in the amplitude of THz radiation, which is believed to be proportional to the magnitude of the inner electric field. In order to increase THz radiation by safely enhancing the biased electric field, simulations on the electric field distributions of several different antennas have been conducted during our research. As a result of comparing and analyzing the findings of the simulations, a specific antenna structure suitable for a much higher biased field has been designed. Furthermore, satisfactory THz radiation is expected from this antenna. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: THz radiation; Photoconductive antenna; Field distribution simulation
Web of Science 类别: Instruments & Instrumentation; Nuclear Science & Technology; Physics, Particles & Fields; Spectroscopy
研究方向: Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
IDS 号: 774WD
ISSN: 0168-9002
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第 122 条,共 209 条
标题: Continuous measurement of the arrival times of x-ray photon sequence
作者: Yan, QR (Yan, Qiurong); Zhao, BS (Zhao, Baosheng); Sheng, LZ (Sheng, Lizhi); Liu, YA (Liu, Yong'an)
来源出版物: REVIEW OF SCIENTIFIC INSTRUMENTS  卷: 82  期: 5  文献号: 053105  DOI: 10.1063/1.3592333  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to record x-ray pulse profile for x-ray pulsar-based navigation and timing, this paper presents a continuous, high-precision method for measuring arrival times of photon sequence with a common starting point. In this method, a high stability atomic clock is counted to measure the coarse time of arrival photon. A high resolution time-to-digital converter is used to measure the fine time of arrival photon. The coarse times and the fine times are recorded continuously and then transferred to computer memory by way of memory switch. The pulse profile is obtained by a special data processing method. A special circuit was developed and a low-level x-ray pulse profile measurement experiment system was setup. The arrival times of x-ray photon sequence can be consecutively recorded with a time resolution of 500 ps and the profile of x-ray pulse was constructed. The data also can be used for analysis by many other methods, such as statistical distribution of photon events per time interval, statistical distribution of time interval between two photon events, photon counting histogram, autocorrelation and higher order autocorrelation. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3592333]
PubMed ID: 21639490
文献类型: Article
KeyWords Plus: FLUORESCENCE; RESOLUTION; ANODES
Web of Science 类别: Instruments & Instrumentation; Physics, Applied
研究方向: Instruments & Instrumentation; Physics
IDS 号: 770RR
ISSN: 0034-6748
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第 123 条,共 209 条
标题: Autonomous Star Identification for GEO Objects Orientation Based on Delaunay Triangulation
作者: Sun, J (Sun, Jing); Li, GR (Li, Guangrui); Wen, DS (Wen, Desheng); Xue, B (Xue, Bin); Yang, SD (Yang, Shaodong)
来源出版物: TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES  卷: 54  期: 183  页: 62-66  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A novel star identification algorithm for GEO objects orientation is presented greatly. The quadrangle patterns are successfully generated by Delaunay triangulation applied to the sphere point set, which reduces the memory and identification time cost compared to the conventional triangle match algorithm. The guide database consisting of three correlative data tables is constructed to arrange the data efficiently. Furthermore, an index array is introduced to search the database rapidly. At validation, 60 images recorded by the GEO surveillance camera are used to implement the algorithm, which gives an identification rate ranging from 99.38% to 95.52% at various positional noise amplitudes. The achievable performance is demonstrated by comparison with two published algorithms.
文献类型: Article
作者关键词: Star Identification; Delaunay Triangulation; GEO Orbit; Guide Database; GEO Surveillance Camera
KeyWords Plus: ATTITUDE DETERMINATION; ALGORITHMS
Web of Science 类别: Engineering, Aerospace
研究方向: Engineering
IDS 号: 771FA
ISSN: 0549-3811
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第 124 条,共 209 条
标题: TRAVELOGUE ENRICHING AND SCENIC SPOT OVERVIEW BASED ON TEXTUAL AND VISUAL TOPIC MODELS
作者: Pang, YW (Pang, Yanwei); Lu, X (Lu, Xin); Yuan, Y (Yuan, Yuan); Li, XL (Li, Xuelong)
来源出版物: INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE  卷: 25  期: 3  页: 373-390  DOI: 10.1142/S0218001411008671  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 7
被引频次合计: 7
摘要: We consider the problem of enriching the travelogue associated with a small number (even one) of images with more web images. Images associated with the travelogue always consist of the content and the style of textual information. Relying on this assumption, in this paper, we present a framework of travelogue enriching, exploiting both textual and visual information generated by different users. The framework aims to select the most relevant images from automatically collected candidate image set to enrich the given travelogue, and form a comprehensive overview of the scenic spot. To do these, we propose to build two-layer probabilistic models, i.e. a text-layer model and image-layer models, on offline collected travelogues and images. Each topic (e.g. Sea, Mountain, Historical Sites) in the text-layer model is followed by an image-layer model with sub-topics learnt (e.g. the topic of sea is with the sub-topic like beach, tree, sunrise and sunset). Based on the model, we develop strategies to enrich travelogues in the following steps: (1) remove noisy names of scenic spots from travelogues; (2) generate queries to automatically gather candidate image set; (3) select images to enrich the travelogue; and (4) choose images to portray the visual content of a scenic spot. Experimental results on Chinese travelogues demonstrate the potential of the proposed approach on tasks of travelogue enrichment and the corresponding scenic spot illustration.
文献类型: Article
作者关键词: Image retrieval; probabilistic model; text mining; travelogue; user-generated content
KeyWords Plus: IMAGE RETRIEVAL; SUBSPACE
Web of Science 类别: Computer Science, Artificial Intelligence
研究方向: Computer Science
IDS 号: 769HF
ISSN: 0218-0014
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第 125 条,共 209 条
标题: Fabrication of high thermal conductive Al-cBN ceramic sinters by high temperature high pressure method
作者: Wang, PF (Wang, P. F.); Li, ZH (Li, Zh. H.); Zhu, YM (Zhu, Y. M.)
来源出版物: SOLID STATE SCIENCES  卷: 13  期: 5  页: 1041-1046  DOI: 10.1016/j.solidstatesciences.2011.01.023  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: Al-cBN ceramic sinters were fabricated by sintering micro-powder mixture of Al and cBN under high temperature and high pressure condition. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) elemental mapping analyses and laser flashing thermal conductivity measurements were performed to investigate the sintering properties and thermal conductivity of the Al-cBN ceramic sinters. XRD analysis revealed these Al cBN ceramic sinters were composed of a large portion of cBN and of a small portion of AIN, and very little amount of AIB(12) and hBN. Formation of boundary phase resulted in the rapid densification of the sinters, as well as the increase of their relative density with increasing Al additions. The Al-cBN ceramic sinters have a maximum thermal conductivity of about 1.94 W/cm K at room temperature and a much higher value of about 2.04 W/cm K at 200 degrees C. Their high thermal conductivity over that of AIN-hBN composites promise Al-cBN ceramic sinters favorite candidates as high efficiency heat sink materials for wide band gap semiconductors. (c) 2011 Elsevier Masson SAS. All rights reserved.
文献类型: Article
作者关键词: High temperature high pressure sintering; Cubic boron nitride; Thermal conductivity; Heat sink materials
KeyWords Plus: CUBIC BORON-NITRIDE; ALUMINUM NITRIDE; COMPOSITES; BN; SCATTERING; INFILTRATION; CRYSTAL; POWDERS
Web of Science 类别: Chemistry, Inorganic & Nuclear; Chemistry, Physical; Physics, Condensed Matter
研究方向: Chemistry; Physics
IDS 号: 770JD
ISSN: 1293-2558
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第 126 条,共 209 条
标题: All-normal dispersion, figure-eight, tunable passively mode-locked fiber laser with an invisible and changeable intracavity bandpass filter
作者: Li, XH (Li, X. H.); Wang, YS (Wang, Y. S.); Zhao, W (Zhao, W.); Zhang, W (Zhang, W.); Yang, Z (Yang, Z.); Hu, XH (Hu, X. H.); Wang, HS (Wang, H. S.); Wang, XL (Wang, X. L.); Zhang, YN (Zhang, Y. N.); Gong, YK (Gong, Y. K.); Li, C (Li, C.); Shen, DY (Shen, D. Y.)
来源出版物: LASER PHYSICS  卷: 21  期: 5  页: 940-944  DOI: 10.1134/S1054660X11090143  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 20
被引频次合计: 20
摘要: We report dissipative solitons generation in the figure-8 all-normal dispersion fiber ring laser. The steep edge of the output optical spectrum results from the filtering effect of NOLM together with polarization controllers (PCs). No any physical bandpass filters are used in the cavity. Moreover, the output wavelength can be tuned in a wide range of about 20 nm. In the long-wavelength region, the spectral filtering effect of NOLM becomes weaker and output spectrum shows only one steep side. Filtering effect can perform periodically with increasing the pump power. The highly chirped pulse has good potential for application to the chirped pulse amplification (CPA) system.
文献类型: Article
KeyWords Plus: OPTICAL LOOP MIRROR; ANOMALOUS-DISPERSION; REPETITION-RATE; CAVITY; GENERATION; SOLITON; PULSES; POLARIZATION; LOCKING
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 766VE
ISSN: 1054-660X
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第 127 条,共 209 条
标题: Comparison of pulse evolutions in low and ultra-large anomalous dispersion mode-locked fiber lasers
作者: Duan, LN (Duan, L. N.); Liu, XM (Liu, X. M.); Wang, LR (Wang, L. R.); Mao, D (Mao, D.); Wang, GX (Wang, G. X.)
来源出版物: LASER PHYSICS  卷: 21  期: 5  页: 948-953  DOI: 10.1134/S1054660X11090052  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: We have investigated and compared the pulse evolutions in low and ultra-large anomalous dispersion erbium-doped fiber lasers mode-locked by the nonlinear polarization rotation technique. Two lasers deliver the pulses that exhibit quite distinct characteristics such as pulse duration, spectral width, and spectral sidebands. Experimental observations show that the spectral width decreases from several nanometers to less than one nanometer whereas pulse duration extends about three times by changing the cavity dispersion from -0.03 to -15.50 ps(2). The solitons in ultra-large anomalous fiber laser show dips in the optical spectrum, which is quite distinct from that of conventional solitons observed in low anomalous regime.
文献类型: Article
KeyWords Plus: ERBIUM-DOPED FIBER; PHOTONIC CRYSTAL FIBER; NONLINEAR POLARIZATION ROTATION; NORMAL-CAVITY-DISPERSION; OPTICAL LOOP MIRROR; LOW-REPETITION-RATE; ALL-FIBER; RING LASER; SOLITON; GENERATION
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 766VE
ISSN: 1054-660X
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第 128 条,共 209 条
标题: Multiple incoherent gray photorefractive spatial solitons
作者: Lu, KQ (Lu, Keqing); Zhang, YH (Zhang, Yuhong); Tian, N (Tian, Ning); Li, KH (Li, Kehao); Zhang, YQ (Zhang, Yiqi); Zhang, XF (Zhang, Xianfeng); Miao, CY (Miao, Changyun); Zhang, YP (Zhang, Yanpeng); Xu, JJ (Xu, Jingjun)
来源出版物: OPTICAL AND QUANTUM ELECTRONICS  卷: 42  期: 5  页: 277-284  DOI: 10.1007/s11082-011-9450-2  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: We show that an even-number sequence of multiple incoherent gray photorefractive spatial screening solitons is possible. When the external voltage is small, only an incoherent Y-junction photorefractive spatial screening soliton is generated, corresponding to the lowest order in the even-number incoherent soliton sequence. When the external voltage is increased, the incoherent gray soliton beam splits into an even-number sequence of multiple incoherent gray photorefractive spatial screening solitons. For a given physical system such an even-number sequence of multiple incoherent gray photorefractive spatial screening solitons is obtained by either increasing the external voltage and decreasing the full width half maximum (FWHM) of the beam's intensity or increasing the external voltage and decreasing the beam's grayness.
文献类型: Article
作者关键词: Soliton splitting; Incoherent solitons; Photorefractive effect; Non-linear optics
KeyWords Plus: LIGHT BEAMS; DARK; MEDIA; BRIGHT
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: 763RR
ISSN: 0306-8919
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第 129 条,共 209 条
标题: The Multi-Spectra Classification Algorithm Based on K-Means Clustering and Spectral Angle Cosine
作者: Wei, JX (Wei Jun-xia); Xiangli, B (Xiangli Bin); Gao, XH (Gao Xiao-hui); Duan, XF (Duan Xiao-feng)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 5  页: 1357-1360  DOI: 10.3964/j.issn.1000-0593(2011)05-1357-04  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: The classification and de-aliasing methods with respect to multi-spectra and hyper-spectra have been widely studied in recent years. And both K-mean clustering algorithm and spectral similarity algorithm are familiar classification methods. The present paper improved the K-mean clustering algorithm by using spectral similarity match algorithm to perform a new spectral classification algorithm. Two spectra with the farthest distance first were chosen as reference spectra. The Euclidean distance method or spectral angle cosine method then were used to classify data cube on the basis of the two reference spectra, and delete the spectra which belongs to the two reference spectra. The rest data cube was used to perform new classification according to a third spectrum, which is the farthest distance or the biggest angle one corresponding to the two reference spectra. Multi-spectral data cube was applied in the experimental test. The results of K-mean clustering classification by ENVI, compared with simulation results of the improved K-mean algorithm and the spectral angle cosine method, demonstrated that the latter two classify two air bubbles explicitly and effectively, and the improved K-mean algorithm classifies backgrounds better, especially the Euclidean distance method can classify the backgrounds integrally.
文献类型: Article
作者关键词: K-means; Euclidean distance method; Spectral angle cosine method; Multi-spectra
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 762GG
ISSN: 1000-0593
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第 130 条,共 209 条
标题: The third-order optical nonlinearities of Ge-Ga-Sb(In)-S chalcogenide glasses
作者: Guo, HT (Guo, Haitao); Chen, HY (Chen, Hongyan); Hou, CQ (Hou, Chaoqi); Lin, AX (Lin, Aoxiang); Zhu, YG (Zhu, Yonggang); Lu, SD (Lu, Shoudi); Gu, SX (Gu, Shaoxuan); Lu, M (Lu, Min); Peng, B (Peng, Bo)
来源出版物: MATERIALS RESEARCH BULLETIN  卷: 46  期: 5  页: 765-770  DOI: 10.1016/j.materresbull.2010.11.020  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 4
摘要: The third-order optical nonlinearities of 80GeS(2)center dot(20 - x)Ga(2)S(3)center dot xY(2)S(3) (x = 0, 5, 10, 15, 20 and Y = Sb or In) chalcogenide glasses were investigated utilizing the Z-scan method at the wavelength of 800 nm and their linear optical properties and structure were also studied. By analyzing the compositional dependences and possible influencing factors including the linear refractive index, the concentration of lone electron pairs, the optical bandgap and the amount of weak covalent/homopolar bonds, it indicates that the electronic contribution in weak heteropolar covalent and homopolar metallic bonds is responsible for large nonlinear refractive index n(2) in the chalcogenide glasses. These chalcogenide glasses have characteristics of environmentally friendship, wide transparency in the visible region, high nonlinear refractive index n(2) and low nonlinear absorption coefficient beta, and would be expected to be used in the all-optical switches working at 1330 nm and 1550 nm telecommunication wavelengths. (C) 2010 Elsevier Ltd. All rights reserved.
文献类型: Article
作者关键词: Chalcogenides; Glasses; Raman specroscopy; Optical properties
KeyWords Plus: RAMAN-SPECTROSCOPIC ANALYSIS; GE-SB-S; CHALCOHALIDE GLASSES; THERMAL-PROPERTIES; SYSTEM GLASSES; AS-SE; FIBERS
Web of Science 类别: Materials Science, Multidisciplinary
研究方向: Materials Science
IDS 号: 753HU
ISSN: 0025-5408
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第 131 条,共 209 条
标题: Ultra-broadband high-energy pulse generation and evolution in a compact erbium-doped all-fiber laser
作者: Wang, LR (Wang, L. R.); Liu, XM (Liu, X. M.); Gong, YK (Gong, Y. K.); Mao, D (Mao, D.); Feng, H (Feng, H.)
来源出版物: LASER PHYSICS LETTERS  卷: 8  期: 5  页: 376-381  DOI: 10.1002/lapl.201010140  出版年: MAY 2011 
Web of Science 核心合集中的 "被引频次": 43
被引频次合计: 44
摘要: We have experimentally observed a new kind of ultra-broadband high-energy dissipative soliton pulse in a compact erbium-doped all-fiber laser with long cavity length and large net normal dispersion. The pulse characteristics and evolution processes are quite distinct from those reported in previous literatures. Remarkablely, the spectral width of pulses increases whereas the pulse duration decreases with the increase of pump power, so the pulse energy and peak power increase monotonically. At the maximum available pump power of 1.1 W, this fiber laser delivers pulses with the 3-dB bandwidth of about 73 nm, the pulse duration of about 56 ps, the pulse energy of about 200 nJ, and the peak power of about 3.5 kW. The proposed all-fiber laser can find important potentials in high-energy pulse generation and amplification systems.
[GRAPHICS]
Optical spectra at the pump powers of P-f = P-b = 150, 250, 350, 450, and 550 mW from bottom to top, respectively (C) 2011 by Astro Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA
文献类型: Article
作者关键词: fiber laser; mode locking; dissipative solitons; high-energy pulse
KeyWords Plus: PHOTONIC-CRYSTAL FIBER; TUNABLE MULTIWAVELENGTH FIBER; NORMAL-DISPERSION; DISSIPATIVE SOLITON; SATURABLE ABSORBER; POLARIZATION; GRAPHENE; CAVITY
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 749DR
ISSN: 1612-2011
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第 132 条,共 209 条
标题: Enhancement of nonreciprocal phase shift by magneto-optical slot waveguide with a compensation wall
作者: Zhang, WF (Zhang, Wenfu); Mu, JW (mu, Jian-Wei); Huang, WP (Huang, Wei-Ping); Zhao, W (Zhao, Wei)
来源出版物: APPLIED PHYSICS LETTERS  卷: 98  期: 17  文献号: 171109  DOI: 10.1063/1.3584035  出版年: APR 25 2011 
Web of Science 核心合集中的 "被引频次": 4
被引频次合计: 4
摘要: We demonstrated that the nonreciprocal phase shift (NPS) can be efficiently enhanced by introducing a low-index magneto-optical (MO) slot with a compensation wall (CW) in a high-index non-MO waveguide. The proposed structure has been examined by a perturbation theory and it is found that by adjusting the slot width and waveguide height, more than 20 times enhancement of NPS comparing with the rib waveguide with a CW can be realized. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3584035]
文献类型: Article
KeyWords Plus: MACH-ZEHNDER INTERFEROMETER; OPTICAL ISOLATOR; TE MODES; INTEGRATED-OPTICS; CONFINING LIGHT; IRON-GARNET; LAYER; DESIGN
Web of Science 类别: Physics, Applied
研究方向: Physics
IDS 号: 756WS
ISSN: 0003-6951
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第 133 条,共 209 条
标题: Designs of multipass optical configurations based on the use of a cube corner retroreflector in the interferometer
作者: Wei, RY (Wei, Ruyi); Zhang, XM (Zhang, Xuemin); Zhou, JS (Zhou, Jinsong); Zhou, SZ (Zhou, Sizhong)
来源出版物: APPLIED OPTICS  卷: 50  期: 12  页: 1673-1681  DOI: 10.1364/AO.50.001673  出版年: APR 20 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We describe designs of the multipass optical configurations of an interferometer with high spectral resolution with respect to 6, 12, and 24 times more optical passes than the conventional Michelson interferometer. In each design, a movable cube corner retroreflector is combined with a folding reflector group (FRG) as the interferometer's moving combination to implement the multipass optical configuration with the characteristic of surface division. Analyses reveal that when there are 12 or more optical passes, the net effect of the ray's angular deviation of the entire moving combination amounts to only the alignment error of one of the reflectors in the FRG, demonstrating the self-aligning property of the interferometer. (C) 2011 Optical Society of America
PubMed ID: 21509058
文献类型: Article
KeyWords Plus: FOURIER-TRANSFORM SPECTROMETER; POLARIZATION PROPERTIES; MICHELSON INTERFEROMETER; DIHEDRAL ANGLE; RESOLUTION; REFLECTORS; CM-1
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 752VM
ISSN: 1559-128X
电子 ISSN: 2155-3165
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第 134 条,共 209 条
标题: Study on scalable Coulombic degradation for estimating the lifetime of organic light-emitting devices
作者: Zhang, WW (Zhang, Wenwen); Wu, ZX (Wu, Zhaoxin); Liang, SX (Liang, Shixiong); Jiao, B (Jiao, Bo); Zhang, XW (Zhang, Xinwen); Wang, DW (Wang, Dawei); Hou, X (Hou, Xun); Chen, ZJ (Chen, Zhijian); Gong, QH (Gong, Qihuang)
来源出版物: JOURNAL OF PHYSICS D-APPLIED PHYSICS  卷: 44  期: 15  文献号: 155103  DOI: 10.1088/0022-3727/44/15/155103  出版年: APR 20 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The luminance decays of organic light-emitting diodes (OLEDs) are investigated with initial luminance of 1000 to 20 000 cdm(-2) through a scalable Coulombic degradation and a stretched exponential decay. We found that the estimated lifetime by scalable Coulombic degradation deviates from the experimental results when the OLEDs work with high initial luminance. By measuring the temperature of the device during degradation, we found that the higher device temperatures will lead to instabilities of organic materials in devices, which is expected to result in the difference between the experimental results and estimation using the scalable Coulombic degradation.
文献类型: Article
KeyWords Plus: ELECTROLUMINESCENT DEVICES; DIODES; STABILITY; EFFICIENT
Web of Science 类别: Physics, Applied
研究方向: Physics
IDS 号: 744FQ
ISSN: 0022-3727
________________________________________
第 135 条,共 209 条
标题: Observations of four types of pulses in a fiber laser with large net-normal dispersion
作者: Wang, LR (Wang, Leiran); Liu, XM (Liu, Xueming); Gong, YK (Gong, Yongkang); Mao, D (Mao, Dong); Duan, LN (Duan, Lina)
来源出版物: OPTICS EXPRESS  卷: 19  期: 8  页: 7616-7624  DOI: 10.1364/OE.19.007616  出版年: APR 11 2011 
Web of Science 核心合集中的 "被引频次": 28
被引频次合计: 30
摘要: Four different types of pulses are experimentally obtained in one erbium-doped all-fiber laser with large net-normal dispersion. The proposed laser can deliver the rectangular-spectrum (RS), Gaussian-spectrum (GS), broadband-spectrum (BS), and noise-like pulses by appropriately adjusting the polarization states. These kinds of pulses have distinctly different characteristics. The RS pulses can easily be compressed to femtosecond level whereas the pulse energy is restricted by the trend of multi-pulse shaping with excessive pump. The GS and BS pulses always maintain the single-pulse operation with much higher pulse-energy and accumulate much more chirp. After launching the pulses into the photonic-crystal fiber, the supercontinuum can be generated with the bandwidth of > 700 nm by the BS pulses and of similar to 400 nm by the GS pulses, whereas it can hardly be generated by the RS pulses. The physical mechanisms behind the continuum generation are qualitatively investigated relating to different operating regimes. This work could help to a deeper insight of the normal-dispersion pulses. (C) 2011 Optical Society of America
PubMed ID: 21503070
文献类型: Article
KeyWords Plus: DISSIPATIVE SOLITON; SATURABLE ABSORBER; ENERGY; GRAPHENE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 762MI
ISSN: 1094-4087
________________________________________
第 136 条,共 209 条
标题: Millijoule pulse energy picosecond fiber chirped-pulse amplification system
作者: Yang, Z (Yang, Zhi); Hu, XH (Hu, Xiaohong); Wang, YS (Wang, Yishan); Zhang, W (Zhang, Wei); Zhao, W (Zhao, Wei)
来源出版物: CHINESE OPTICS LETTERS  卷: 9  期: 4  文献号: 041401  DOI: 10.3788/COL201109.041401  出版年: APR 10 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: The efficient generation of a 1.17-mJ laser pulse with 360 ps duration using an ytterbium (Yb)-doped fiber amplifier chain seeded by a homemade mode-locked fiber laser is demonstrated experimentally. A specially designed figure-of-eight fiber laser acts as the seed source of a chirped-pulse amplification (CPA) system and generates mode-locked pulses with hundreds of picosecond widths. Two kinds of large-mode-area (LMA) double-clad Yb-doped fibers are employed to construct the pre-amplifier and main amplifier. All of the adopted instruments help avoid severe nonlinearity in fibers to raise sub-nanosecond pulse energy with acceptable signal-to-noise ratio (SNR). The output spectrum of this fiber-based CPA system shows that amplified spontaneous emission (ASE) is suppressed to better than 30 dB, and the onset of stimulated Raman scattering is excluded.
文献类型: Article
KeyWords Plus: REPETITION-RATE; CRYSTAL FIBER; POWER; LASER; AMPLIFIER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 751JI
ISSN: 1671-7694
________________________________________
第 137 条,共 209 条
标题: Advance in Interferogram Data Processing Technique
作者: Jing, JJ (Jing Juan-juan); Xiangli, B (Xiangli Bin); Lu, QB (Lue Qun-bo); Huang, M (Huang Min); Zhou, JS (Zhou Jin-song)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 4  页: 865-870  DOI: 10.3964/j.issn.1000-0593(2011)04-0865-06  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 5
摘要: Fourier transform spectrometry is a type of novel information obtaining technology, which integrated the functions of imaging and spectra, but the data that the instrument acquired is the interference data of the target, which is an intermediate data and couldn't be used directly, so data processing must be adopted for the successful application of the interferometric data. In the present paper, data processing techniques are divided into two classes: general-purpose and special-type. First, the advance in universal interferometric data processing technique is introduced, then the special-type interferometric data extracting method and data processing technique is illustrated according to the classification of Fourier transform spectroscopy. Finally, the trends of interferogram data processing technique are discussed.
文献类型: Article
作者关键词: Spectral recovery; Spatially modulation; Temporally modulation; Spatio-temporally modulation; Error correction
KeyWords Plus: FOURIER-TRANSFORM SPECTROMETER; IMAGING SPECTROMETER; SPECTROSCOPY; PERFORMANCE; COMPUTATION; SPECTRUM; DESIGN; IMAGER
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 772IL
ISSN: 1000-0593
________________________________________
第 138 条,共 209 条
标题: An Adaptive VQ Algorithm Used in Interferential Multi-Spectral Image
作者: Wen, J (Wen Jia); Ma, CW (Ma Cai-wen); Shui, PL (Shui Peng-lang)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 4  页: 1033-1037  DOI: 10.3964/j.issn.1000-0593(2011)04-1033-05  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 3
摘要: In the present paper, an adaptive LBG VQ algorithm is proposed based on the point to line model for the expansion of LBG VQ algorithm which was proposed in 2009, and using the algorithm proposed in this paper can achieve less error quantification, and can avoid the increase in bits of the larger index generated by the point to line expansion of LBG VQ algorithm. This new algorithm was used in lossless compression of interferential multi-spectral LASIS image, and experiment shows that the adaptive LBG VQ algorithm can remarkably improve the lossless compression performance of interferential multi-spectral image, and that if using these VQ algorithms above after Dual-Direction Prediction, the compression ratio generated by the point to line expansion of LBG VQ algorithm will be a little less than that generated by conventional LBG VQ algorithm, and the compression ratio generated by the algorithm proposed in this paper will be much larger than that generated by conventional LBG VQ algorithm.
文献类型: Article
作者关键词: Interferential multi-spectral image; LASIS; Image coding; LEG vector quantification
KeyWords Plus: QUANTIZATION
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 772IL
ISSN: 1000-0593
________________________________________
第 139 条,共 209 条
标题: Selection of Interpolation Methods Used to Mitigate Spectral Misregistration of Imaging Spectrometers
作者: Chen, X (Chen Xu); Xiang, Y (Xiang Yang); Feng, YT (Feng Yu-tao)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 4  页: 1147-1150  DOI: 10.3964/j.issn.1000-0593(2011)04-1147-04  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Spectral curvature destroys the co-registration of the spectra measured by dispersion imaging spectrometer. Using interpolation to re-sample the measured spectra at the non-offset mid-wavelengths can mitigate the spectral misregistration. It is very important to select an optimum interpolation method. The performances of six common interpolation methods are evaluated by comparing the residual errors in the corrected spectral radiance. The results indicate that, four-point cubic Lagrange interpolation and cubic spline interpolation are better than other four interpolation methods (linear Interpolation, three points quadratic polynomial interpolation, five points four-order Lagrange interpolation and cubic Hermite interpolation). For spectral offset of 10% Delta lambda(Delta lambda=5 nm), the normalized errors in measured spectral radiance is PV=0. 06, that is reduced to PV<0. 022 after interpolation with cubic Lagrange interpolation or cubic spline interpolation, but for other four methods they are PV> 0. 035. Furthermore, for lower spectral resolution (Delta lambda>5 nm), cubic Lagrange interpolation is a little better than cubic spline interpolation; while for higher spectral resolution (Delta lambda<5 nm), cubic spline interpolation is a little better.
文献类型: Article
作者关键词: Interpolation method; Radiance correction; Spectral curvature (smile); Imaging spectrometers
KeyWords Plus: CALIBRATION
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 772IL
ISSN: 1000-0593
________________________________________
第 140 条,共 209 条
标题: Enhanced third order nonlinear optical property of a side-chain conjugated thiophene copolymer
作者: Gao, C (Gao Chao); Qiu, SJ (Qiu Shao-Jun); Du, WS (Du Wei-Song); Hou, CQ (Hou Chao-Qi); Guo, HY (Guo Hong-Yan); Yang, ZF (Yang Zhao-Fei)
来源出版物: ACTA PHYSICA SINICA  卷: 60  期: 4  文献号: 044211  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A novel side-chain conjugated polythiophene copolymer with a narrow band gap of 1. 72eV, poly [ 3-(5' - octylthienylenevinyl) thiophene] -thiophene (POTVTh-Th), is synthesized by the Stille coupling reaction. The third order nonlinear optical properties of the copolymer are measured by femtosecond Z-scan technique at 800nm. The results indicate that the third order nonlinear susceptibilities of the polymer solution and the film are 8. 84 x 10(-10) esu and 7. 25 x 10(-9) esu, respectively, which are 2. 17 and 1. 68 times bigger than those of its homopolymer, showing enhanced third order nonlinear optical properties and the good nonlinear optical properties of this side-chain conjugated copolymers.
文献类型: Article
作者关键词: side-chain conjugated polymers; thiophene copolymer; third order nonlinear optical susceptibility; nonlinear absorption coefficient
KeyWords Plus: Z-SCAN TECHNIQUE; PHOTOVOLTAIC PROPERTIES; POLYMER; POLYTHIOPHENE; ABSORPTION; DERIVATIVES
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 754NW
ISSN: 1000-3290
________________________________________
第 141 条,共 209 条
标题: Influence of charge cloud size on performance of UV photon-counting imaging detector
作者: Liu, YA (Liu Yong-An); Yan, QR (Yan Qiu-Rong); Sheng, LZ (Sheng Li-Zhi); Zhao, FF (Zhao Fei-Fei); Hu, HJ (Hu Hui-Jun); Zhao, BS (Zhao Bao-Sheng)
来源出版物: ACTA PHYSICA SINICA  卷: 60  期: 4  文献号: 048501  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 2
摘要: The size of charge cloud is examined as a function of acceleration voltage, distance between MCP and anode, and MCP gain. The performance of photon counting imaging detector is significantly affected by charge cloud size. In this paper, the influence of charge cloud size on the performance of UV photon-counting imaging systems is investigated. Modulation distortion, "S" distortion and their cause are discussed. Then, Monte Carlo simulations for anode decode with different charge cloud sizes are carried out. And finally, the effects of acceleration voltage, distance between MCP and WSA, and MCP gain on the system performance are tested and some practical solutions of modulation and "S" distortion are suggested.
文献类型: Article
作者关键词: photon-counting imaging; wedge-and-strip anode; micro-channel plate; anode detector
KeyWords Plus: POSITION; SYSTEM
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 754NW
ISSN: 1000-3290
________________________________________
第 142 条,共 209 条
标题: High power all-fiber structured supercontinuum source with variable spectral coverage
作者: Yang, Z (Yang, Z.); Hu, XH (Hu, X. H.); Wang, YS (Wang, Y. S.); Zhang, W (Zhang, W.); Zhao, W (Zhao, W.)
来源出版物: LASER PHYSICS  卷: 21  期: 4  页: 704-707  DOI: 10.1134/S1054660X11070310  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 8
被引频次合计: 8
摘要: An all-fiber structured supercontinuum source based on chirped pulse amplification (CPA) technology and the use of nonlinear photonic crystal fiber was constructed. By experimentally varying fiber stretcher length in CPA laser source, we can change the spectral coverage and therefore the percentage of visible light in the produced supercontinuum at output of nonlinear photonic crystal fiber, while the average supercontinuum power always keeps at watts of level. The all-fiber structured feature and the capability of changing supercontinuum spectral coverage make this CPA system a promising implement for different applications that require different broad band spectrum.
文献类型: Article
KeyWords Plus: PHOTONIC-CRYSTAL-FIBER; MU-M; GENERATION; LASER; DISPERSION
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 747BP
ISSN: 1054-660X
电子 ISSN: 1555-6611
________________________________________
第 143 条,共 209 条
标题: Optical bistability in metal-insulator-metal plasmonic Bragg waveguides with Kerr nonlinear defects
作者: Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Gong, YK (Gong, Yongkang); Mao, D (Mao, Dong); Wang, LR (Wang, Leiran)
来源出版物: APPLIED OPTICS  卷: 50  期: 10  页: 1307-1311  DOI: 10.1364/AO.50.001307  出版年: APR 1 2011 
Web of Science 核心合集中的 "被引频次": 18
被引频次合计: 18
摘要: We numerically investigate the characteristics of the defect mode and the nonlinear effect of optical bistability in metal-insulator-metal (MIM) plasmonic Bragg grating waveguides with Kerr nonlinear defects. By means of finite-difference time-domain simulations, we find that the defect mode peak exhibits a blueshift and height-rise by enlarging the width of the defect layer, and it has a redshift and height-fall with the increase of the dielectric constant of defect layer. Obvious optical bistability is obtained in our waveguides with a length of less than 2 mu m. The results show that our structure could be applied to the design of all-optical switching in highly integrated optical circuits. (C) 2011 Optical Society of America
PubMed ID: 21460893
文献类型: Article
KeyWords Plus: SURFACE; POLARITON; REFLECTOR; NANOCAVITIES; BANDGAP
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 744CF
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 144 条,共 209 条
标题: Experimental investigation of high-energy wave-breaking-free-pulse generation in bidirectional-pumping all-fiber laser
作者: Liu, XM (Liu, Xueming); Mao, D (Mao, Dong); Wang, LR (Wang, Leiran); Duan, LN (Duan, Lina)
来源出版物: APPLIED OPTICS  卷: 50  期: 10  页: 1465-1468  DOI: 10.1364/AO.50.001465  出版年: APR 1 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: We report a passively mode-locked all-fiber laser with bidirectional pumping, emitting high-energy wave-breaking-free pulses. Experimental investigations show that forward and backward pump powers mainly contribute on the chirp and the nonlinear phase shift of pulses, respectively. Nonlinear chirp pulses with 50 nJ pulse energy, 340 ps duration at a 8.2MHz repetition rate are directly emitted from the all-fiber laser pumped by two 550 mW, 977 nm laser diodes. The pulses cannot be compressed to near the transform limit, showing that the chirp of pulses is nonlinear. (C) 2011 Optical Society of America
PubMed ID: 21460915
文献类型: Article
KeyWords Plus: NORMAL-CAVITY-DISPERSION; DOPED FIBER; DISSIPATIVE SOLITONS; RING LASER; OSCILLATOR; EVOLUTION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 744CF
ISSN: 1559-128X
电子 ISSN: 2155-3165
________________________________________
第 145 条,共 209 条
标题: Two-dimensional photon counting imaging detector based on a Vernier position sensitive anode readout
作者: Yan, QR (Yan Qiu-Rong); Zhao, BS (Zhao Bao-Sheng); Liu, YA (Liu Yong-An); Yang, H (Yang Hao); Sheng, LZ (Sheng Li-Zhi); Wei, YL (Wei Yong-Lin)
来源出版物: CHINESE PHYSICS C  卷: 35  期: 4  页: 368-373  DOI: 10.1088/1674-1137/35/4/009  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: A two-dimensional photon counting imaging detector based on a Vernier position sensitive anode is reported. The decode principle and design of a two-dimensional Vernier anode are introduced in detail. A photon counting imaging system was built based on a Vernier anode. The image of very weak optical radiation can be reconstructed by image processing in a period of integration time. The resolution is superior to 100 mu m according to the resolution test. The detector may realize the imaging of very weak particle flow of high-energy photons, electrons and ions, so it can be used for high-energy physics, deep space exploration, spectral measurement and bio-luminescence detection.
文献类型: Article
作者关键词: photon counting imaging; Vernier anode; micro-channel plate; particle detection
KeyWords Plus: STRIP ANODES; RESOLUTION; DESIGN; SYSTEM
Web of Science 类别: Physics, Nuclear; Physics, Particles & Fields
研究方向: Physics
IDS 号: 743SY
ISSN: 1674-1137
________________________________________
第 146 条,共 209 条
标题: Luminescence properties of Nd3+-doped Y2O3 nanoparticles in organic media
作者: Cui, XX (Cui, Xiaoxia); Lu, JB (Lu, Jiabao); Gao, C (Gao, Chao); Hou, CQ (Hou, Chaoqi); Wei, W (Wei, Wei); Peng, B (Peng, Bo)
来源出版物: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  卷: 103  期: 1  页: 27-32  DOI: 10.1007/s00339-010-6015-3  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Nd3+-doped yttrium oxide nanoparticles (Y2O3:Nd) with cubic phase were obtained successfully by a glycine-nitrate solution combustion method. The results of Fourier transform infrared spectra (FTIR) showed that the -OH groups residing on the nanoparticles surfaces were reduced effectively by modifying with capping agent. The modified Y2O3:Nd nanoparticles displayed good monodispersity and excellent luminescence in N,N-dimethylformamide (DMF) solvent. Some optical parameters were calculated by Judd-Ofelt analysis based on absorption and fluorescence spectra. A relative large stimulated emission cross section, 1.7x10(-20) cm(2), of the F-4(3/2)-> I-4(11/2) transition was calculated. Theses results show that the modified Y2O3:Nd nanoparticles display good luminescence behavior in organic media.
文献类型: Article
KeyWords Plus: RARE-EARTH IONS; GLASS-CERAMICS; ND3+ IONS; NANOCRYSTALS; INTENSITIES; EMISSION; LAF3
Web of Science 类别: Materials Science, Multidisciplinary; Physics, Applied
研究方向: Materials Science; Physics
IDS 号: 739WT
ISSN: 0947-8396
________________________________________
第 147 条,共 209 条
标题: Partially Supervised Neighbor Embedding for Example-Based Image Super-Resolution
作者: Zhang, KB (Zhang, Kaibing); Gao, XB (Gao, Xinbo); Li, XL (Li, Xuelong); Tao, DC (Tao, Dacheng)
来源出版物: IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING  卷: 5  期: 2  页: 230-239  DOI: 10.1109/JSTSP.2010.2048606  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 17
被引频次合计: 20
摘要: Neighbor embedding algorithm has been widely used in example-based super-resolution reconstruction from a single frame, which makes the assumption that neighbor patches embedded are contained in a single manifold. However, it is not always true for complicated texture structure. In this paper, we believe that textures may be contained in multiple manifolds, corresponding to classes. Under this assumption, we present a novel example-based image super-resolution reconstruction algorithm with clustering and supervised neighbor embedding (CSNE). First, a class predictor for low-resolution (LR) patches is learnt by an unsupervised Gaussian mixture model. Then by utilizing class label information of each patch, a supervised neighbor embedding is used to estimate high-resolution (HR) patches corresponding to LR patches. The experimental results show that the proposed method can achieve a better recovery of LR comparing with other simple schemes using neighbor embedding.
文献类型: Article
作者关键词: Clustering; example-based super-resolution; supervised neighbor embedding
KeyWords Plus: RESOLUTION ENHANCEMENT; RESTORATION; INTERPOLATION; SELECTION; SEQUENCE; VIDEO
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: 735ZA
ISSN: 1932-4553
________________________________________
第 148 条,共 209 条
标题: Supervised Gaussian Process Latent Variable Model for Dimensionality Reduction
作者: Gao, XB (Gao, Xinbo); Wang, XM (Wang, Xiumei); Tao, DC (Tao, Dacheng); Li, XL (Li, Xuelong)
来源出版物: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS  卷: 41  期: 2  页: 425-434  DOI: 10.1109/TSMCB.2010.2057422  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 9
被引频次合计: 11
摘要: The Gaussian process latent variable model (GP-LVM) has been identified to be an effective probabilistic approach for dimensionality reduction because it can obtain a low-dimensional manifold of a data set in an unsupervised fashion. Consequently, the GP-LVM is insufficient for supervised learning tasks (e. g., classification and regression) because it ignores the class label information for dimensionality reduction. In this paper, a supervised GP-LVM is developed for supervised learning tasks, and the maximum a posteriori algorithm is introduced to estimate positions of all samples in the latent variable space. We present experimental evidences suggesting that the supervised GP-LVM is able to use the class label information effectively, and thus, it outperforms the GP-LVM and the discriminative extension of the GP-LVM consistently. The comparison with some supervised classification methods, such as Gaussian process classification and support vector machines, is also given to illustrate the advantage of the proposed method.
PubMed ID: 20699213
文献类型: Article
作者关键词: Dimensionality reduction; Gaussian process latent variable model (GP-LVM); generalized discriminant analysis (GDA); probabilistic principal component analysis (probabilistic PCA); supervised learning
KeyWords Plus: PRINCIPAL COMPONENT ANALYSIS; CLASSIFICATION; RECOGNITION
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics
研究方向: Automation & Control Systems; Computer Science
IDS 号: 735XP
ISSN: 1083-4419
________________________________________
第 149 条,共 209 条
标题: A Relay Level Set Method for Automatic Image Segmentation
作者: Gao, XB (Gao, Xinbo); Wang, B (Wang, Bin); Tao, DC (Tao, Dacheng); Li, XL (Li, Xuelong)
来源出版物: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS  卷: 41  期: 2  页: 518-525  DOI: 10.1109/TSMCB.2010.2065800  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 25
被引频次合计: 25
摘要: This paper presents a new image segmentation method that applies an edge-based level set method in a relay fashion. The proposed method segments an image in a series of nested subregions that are automatically created by shrinking the stabilized curves in their previous subregions. The final result is obtained by combining all boundaries detected in these subregions. The proposed method has the following three advantages: 1) It can be automatically executed without human-computer interactions; 2) it applies the edge-based level set method with relay fashion to detect all boundaries; and 3) it automatically obtains a full segmentation without specifying the number of relays in advance. The comparison experiments illustrate that the proposed method performs better than the representative level set methods, and it can obtain similar or better results compared with other popular segmentation algorithms.
PubMed ID: 20875975
文献类型: Article
作者关键词: Energy minimization; finite difference; geometric active contour; image segmentation; partial differential equation (PDE); relay level set
KeyWords Plus: ENERGY MINIMIZATION; ACTIVE CONTOURS; MEAN SHIFT; GRAPH CUTS; FLOW; ALGORITHMS; RECOGNITION; EVOLUTION; GRADIENT; MUMFORD
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics
研究方向: Automation & Control Systems; Computer Science
IDS 号: 735XP
ISSN: 1083-4419
________________________________________
第 150 条,共 209 条
标题: A 3D non-linear orientation prediction wavelet transform for interference hyperspectral images compression
作者: Wen, J (Wen, Jia); Ma, CW (Ma, Caiwen); Shui, PL (Shui, Penglang)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 7  页: 1770-1777  DOI: 10.1016/j.optcom.2010.11.069  出版年: APR 1 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: According to the characteristic of large aperture static interference imaging spectrometer (LASIS), a non-linear orientation prediction three-dimensional (3D) wavelet transform method is proposed in this paper on the basis of the 3D orientation prediction wavelet transform method proposed by Li, Ma and Wu in 2008 [1]. The method proposed in this paper still combines directional prediction into 3D lifting wavelet transformation, but compared with the 3D orientation prediction wavelet transform method, it made a breakthrough in the limitation that the orientation predicted must be a straight linear direction. The experimental results showed that this method improved the performance of wavelet obviously, especially on the LASIS image with quite severe and unstable directional characteristic as seen in the study of Ma and Ma (2009) [2]. Meanwhile, the characteristic of spectrum image recovered by the proposed method also possessed better performance. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Optics information; Spectrum compression; Orientation prediction-based wavelet transform; Interference hyperspectral image
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 730OP
ISSN: 0030-4018


第 151 条,共 209 条
标题: Efficient HOG human detection
作者: Pang, YW (Pang, Yanwei); Yuan, YA (Yuan, Yuan); Li, XL (Li, Xuelong); Pan, J (Pan, Jing)
来源出版物: SIGNAL PROCESSING  卷: 91  期: 4  页: 773-781  DOI: 10.1016/j.sigpro.2010.08.010  出版年: APR 2011 
Web of Science 核心合集中的 "被引频次": 33
被引频次合计: 35
摘要: While Histograms of Oriented Gradients (HOG) plus Support Vector Machine (SVM) (HOG+SVM) is the most successful human detection algorithm, it is time-consuming. This paper proposes two ways to deal with this problem. One way is to reuse the features in blocks to construct the HOG features for intersecting detection windows. Another way is to utilize sub-cell based interpolation to efficiently compute the HOG features for each block. The combination of the two ways results in significant increase in detecting humans-more than five times better. To evaluate the proposed method, we have established a top-view human database. Experimental results on the top-view database and the well-known INRIA data set have demonstrated the effectiveness and efficiency of the proposed method. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Image and video processing; Human detection; HOG; Fast algorithm
KeyWords Plus: SUPPORT VECTOR MACHINES; PEDESTRIAN DETECTION; FACE RECOGNITION; TIME
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: 715EZ
ISSN: 0165-1684
________________________________________
第 152 条,共 209 条
标题: Coexistence of strong and weak pulses in a fiber laser with largely anomalous dispersion
作者: Liu, XM (Liu, Xueming)
来源出版物: OPTICS EXPRESS  卷: 19  期: 7  页: 5874-5887  DOI: 10.1364/OE.19.005874  出版年: MAR 28 2011 
Web of Science 核心合集中的 "被引频次": 14
被引频次合计: 15
摘要: The coexistence of weakly sech-shaped solitons and strongly dissipative solitons is experimentally observed in an ultra-large net-anomalous-dispersion mode-locked fiber laser for the first time to author's best knowledge. Both sech-shaped and dissipative solitons appear to be the asymmetrically combined pulse state with one pulse component much smaller than the other. The energy of dissipative solitons is over three orders of magnitude larger than that of sech-shaped solitons. Two different types of pulse-shaping mechanisms coexist in the laser: one is the dissipative processes and the other is the balance between anomalous dispersion and nonlinear Kerr effect. Numerical simulations and analysis confirm the experimental observations. (c) 2011 Optical Society of America
PubMed ID: 21451612
文献类型: Article
KeyWords Plus: GINZBURG-LANDAU EQUATION; NORMAL-CAVITY-DISPERSION; DISSIPATIVE SOLITON; SATURABLE ABSORBER; RING LASER; AMPLIFICATION; GENERATION; EVOLUTION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 741GR
ISSN: 1094-4087
________________________________________
第 153 条,共 209 条
标题: Dissipative soliton generation/compression in compact all-fibre laser system
作者: Wang, LR (Wang, L. R.); Liu, XM (Liu, X. M.); Gong, YK (Gong, Y. K.); Mao, D (Mao, D.); Lu, H (Lu, H.)
来源出版物: ELECTRONICS LETTERS  卷: 47  期: 6  页: 392-U59  DOI: 10.1049/el.2010.3674  出版年: MAR 17 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The generation and compression of dissipative-soliton (DS) pulses in a compact erbium-doped all-fibre laser system is investigated experimentally. The high-energy picosecond DSs can be dechirped to femtosecond pulses by a segment of singlemode fibre with the maximal compression factor of 122. It is found that the necessary dispersion to compress DSs is approximately proportional to their initial pulse durations, and the larger the spectrum width, the less the dispersion needed to dechirp the DSs.
文献类型: Article
KeyWords Plus: NORMAL-DISPERSION
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: 741UY
ISSN: 0013-5194
________________________________________
第 154 条,共 209 条
标题: 3-Dimensional thermal analysis of Yb3+-doped gain guided and index-antiguided fiber amplifier
作者: Yan, KL (Yan Kun-Lun); Zhou, EY (Zhou En-Yu); Wei, W (Wei Wei); Peng, B (Peng Bo)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 6  页: 1626-1630  DOI: 10.1016/j.optcom.2010.11.033  出版年: MAR 15 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 3
摘要: In this paper, the thermal characteristics of gain-guided and index-antiguided (GG-IAG) fiber amplifier were investigated with a 3-D heat flow model, based on rate equations. From the simulation results, it is found that the longitudinal heat conduction has a very important influence on the GG-IAG fiber amplifier temperature distribution, and the GG-IAG fiber amplifier would be subjected to a more serious thermal problem. Finally, the influence of different pump directions, cooling methods, cladding radius and negative refractive index step on the temperature distribution has also been studied. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Gain-guided index-antiguided fiber; 3-D thermal analysis; Yb3+-doped fiber amplifier
KeyWords Plus: LASERS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 725ER
ISSN: 0030-4018
________________________________________
第 155 条,共 209 条
标题: ULTRA-HIGH ON/OFF RATIO OPTICAL TRIGGER BASED ON SOI-SOA WAVEGUIDE
作者: Wu, JW (Wu, Jian-Wei); Tsao, SL (Tsao, Shyh-Lin)
来源出版物: JOURNAL OF RUSSIAN LASER RESEARCH  卷: 32  期: 2  页: 144-152  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We present a device able to perform an all-optical trigger by utilizing the cascaded silicon-on-insulator (SOI) and semiconductor-optical-amplifier (SOA) optical waveguides, where both the controlling pulse and the signal pulse are co-propagating along the device. The results of numerical simulations show that the all-optical trigger behavior with ultra-high on/off ratio can be easily achieved by adjusting the device parameters. To improve and optimize the optical trigger operation, the negative initial delay (the signal pulse before the controlling pulse) and the positive initial delay (the signal pulse after the controlling pulse) are considered for performing the optical trigger operation.
文献类型: Article
作者关键词: integrated optics; silicon on insulator; semiconductor optical amplifier; optical trigger
KeyWords Plus: WAVELENGTH CONVERSION; SILICON PHOTONICS; AMPLIFICATION; INJECTION; AMPLIFIER; LASER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 769TY
ISSN: 1071-2836
________________________________________
第 156 条,共 209 条
标题: Experimental observations of separation-changeable soliton pairs in a fiber laser mode-locked by nonlinear polarization rotation technique
作者: Li, XH (Li, Xiaohui); Liu, XM (Liu, Xueming); Hu, XH (Hu, Xiaohong); Wang, LR (Wang, Leiran); Gong, YK (Gong, Yongkang); Lu, U (Lu, Ua); Mao, D (Mao, Dong)
来源出版物: JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS  卷: 13  期: 2-4  页: 190-195  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: The soliton pairs with changeable temporal separation in a passively mode-locked fiber laser are investigated experimentally. Temporal separations of pulses are as large as tens of nanoseconds, which are almost four orders of magnitudes larger than the pulse duration. The mechanism of the changeable separation mainly attributes to the variation of the linear phase delay in the cavity. Soliton pairs with large temporal separations and their variable characteristics are different from the operation of typical harmonic or bound state of solitons. These novel states in this report can be considered as the quasi-bound states.
文献类型: Article
作者关键词: Mode-locked lasers; Sparation-changeable soliton pairs; Quasi-bound soliton states; Ultrashort pulses
KeyWords Plus: RING LASER; ANOMALOUS-DISPERSION; REPETITION-RATE; LOCKING; PULSES; PHASE; GHZ
Web of Science 类别: Materials Science, Multidisciplinary; Optics; Physics, Applied
研究方向: Materials Science; Optics; Physics
IDS 号: 765VX
ISSN: 1454-4164
________________________________________
第 157 条,共 209 条
标题: Synthesis, crystal structure and photophysical properties of a neodymium trifluoroacetate complex with 2,2 '-bipyridine
作者: She, JB (She Jiangbo); Li, DD (Li Dongdong); Hou, CQ (Hou Chaoqi); Yang, WZ (Yang Wenzheng); Wei, W (Wei Wei); Peng, B (Peng Bo)
来源出版物: JOURNAL OF RARE EARTHS  卷: 29  期: 3  页: 193-197  DOI: 10.1016/S1002-0721(10)60429-2  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 6
摘要: The neodymium trifluoroacetate complexes were synthesized and characterized by single-crystal X-ray diffraction for [Nd(CF3COO)(3)center dot Bpy center dot(H2O)(3)]Bpy (1), elemental and TG analysis, FT-IR spectra, and PL spectra for Nd(CF3COO)(3)center dot Bpy (2) (Bpy: 2,2'-bipyridine). The most interesting feature of the crystal structure for 1 is that it comprises a coordinated 2,2'-bipyridine molecule and an out-sphere 2,2'-bipyridine molecule. At the same time, the C-O distances appeared average which indicates the three atoms of carboxylato forming electron-conjugate system. Hydrogen bond and pi-pi-stacking link the binuclear to two-dimensional sheet. The optical spectra for 2 exhibited that the complex possessed typical Nd (III) ion absorption and photoluminescence emission. The emission cross-section of F-4(3/2)-> I-4(11/2) fluorescence transition (3.63x10(-20) cm(2)) was comparable with some laser glasses, which indicated good radiative properties of this neodymium trifluoroacetate complex in liquid matrix. The thermal analysis indicated that it was quite stable to heat.
文献类型: Article
作者关键词: neodymium trifluoroacetate; 2,2 '-bipyridine; crystal structure; luminescent property; rare earths
KeyWords Plus: EMISSION CROSS-SECTION; TRANSITION-PROBABILITIES; OPTICAL-PROPERTIES; FLUORESCENCE; LASER; LUMINESCENCE; DESIGN; OIL
Web of Science 类别: Chemistry, Applied
研究方向: Chemistry
IDS 号: 755NX
ISSN: 1002-0721
________________________________________
第 158 条,共 209 条
标题: All-optical wavelength multicasting exploiting cross-phase modulation in a dispersion-flattened nonlinear photonic crystal fiber
作者: Hui, ZQ (Hui, Z. Q.); Zhang, JG (Zhang, J. G.)
来源出版物: LASER PHYSICS  卷: 21  期: 3  页: 512-518  DOI: 10.1134/S1054660X11050094  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: An all-optical wavelength multicasting scheme with tunable output wavelength and channel numbers has been proposed and demonstrated based on cross-phase modulation (XPM) in a dispersion-flattened highly nonlinear photonic crystal fiber. We show that the input signal wavelength can be simultaneously converted to four different wavelengths by filtering the broadened sideband of the continuous-wave (CW) probe beams. The experiments are carried out to investigate into the wavelength tunability, and exploit the dynamic characteristics with variable input signal powers, the ability of multicasting channels scalable, and the relationship between the multicasting signal qualities with variable optical band-pass filter (OBPF) bandwidth. The results indicate that the proposed wavelength multicasting scheme has the advantages of simple structure, efficient operation in a wide wavelength range, as well as transparent to bit rates. Moreover, the system can be upgraded to generate more multicasting channels by increasing the number of CW probe beams.
文献类型: Article
KeyWords Plus: CONVERSION; LASER; GENERATION; FWM
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 753SA
ISSN: 1054-660X
________________________________________
第 159 条,共 209 条
标题: Structural characterizations and the third-order nonlinear optical properties of poly(2,5-didecyloxy)phenylene films modified by N+ ions implantation
作者: Gao, C (Gao, Chao); Du, WS (Du, Weisong); Qiu, SJ (Qiu, Shaojun); Lin, Q (Lin, Qun); Wu, HC (Wu, Hongcai); Liu, XZ (Liu, Xiaozeng); Guo, HY (Guo, Hongyan); Liu, JQ (Liu, Jianqun)
来源出版物: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS  卷: 269  期: 5  页: 513-518  DOI: 10.1016/j.nimb.2010.12.040  出版年: MAR 1 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Poly(2,5-didecyloxy)phenylene (PDDOP) films implanted by 30 key nitrogen ions (N+) with the dose rang of 10(15)-10(17) ions/cm(2) were characterized by FTIR-ATR spectra, UV-VIS spectra and X-ray photoelectron spectroscopy, which showed that the C-H bonds of the PDDOP films were largely broken and new bonds like C=C,C=N and C N were formed as the increasing ion fluence. The third-order nonlinear optical susceptibilities (chi((3))) were measured by degenerate four-wave mixing (DFWM) technique at 532 nm. The results demonstrated that the (chi((3))) value of PDDOP films was maximized to 4.19 x 10(-11) esu at an ion dose of 1.15 x 10(17) ions/cm(2), which was 4.4 times larger than that of the pristine film. The enhanced third-order nonlinear properties may attribute to the enlarged expansion coefficient and the enhanced absorption coefficient of the bombarded films at proper N ions dose. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Poly(2,5-didecyloxy)phenylene; Ion implantation; Degenerate four-wave mixing; Nonlinear optical property
KeyWords Plus: POLYMERS
Web of Science 类别: Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear
研究方向: Instruments & Instrumentation; Nuclear Science & Technology; Physics
IDS 号: 739RH
ISSN: 0168-583X
________________________________________
第 160 条,共 209 条
标题: LUT: A Lunar-based Ultraviolet Telescope
作者: Cao, L (Cao Li); Ruan, P (Ruan Ping); Cai, HB (Cai HongBo); Deng, JS (Deng JinSong); Hu, JY (Hu JingYao); Jiang, XJ (Jiang XiaoJun); Liu, ZH (Liu ZhaoHui); Qiu, YL (Qiu YuLei); Wang, J (Wang Jing); Wang, S (Wang Shen); Yang, JF (Yang JianFeng); Zhao, F (Zhao Fei); Wei, JY (Wei JianYan)
来源出版物: SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY  卷: 54  期: 3  页: 558-562  DOI: 10.1007/s11433-011-4255-7  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: The Lunar-based Ultraviolet Telescope (LUT) is a funded lunar-based ultraviolet telescope dedicated to continuously monitoring variable stars for as long as dozens of days and performing low Galactic latitude sky surveys. The slow and smooth spin of the Moon makes its step by step pointing strategy possible. A flat mirror mounted on a gimbal mount is configured to enlarge the sky coverage of the LUT. A Ritchey-Chretien telescope with a Nasmyth focus configuration is adopted to reduce the total length of the system. A UV enhanced back illuminated AIMO CCD 47-20 chip together with the low noise electric design will minimize the instrumental influence on the system. The preliminary proposal for astrometric calibration and photometric calibration are also presented.
文献类型: Article
作者关键词: ultraviolet; space-based ultraviolet telescope; photometric instrumentation; lunar probe
KeyWords Plus: FAR-ULTRAVIOLET; STANDARD STARS
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 743GT
ISSN: 1674-7348
________________________________________
第 161 条,共 209 条
标题: Parallel two-step phase-shifting digital holograph microscopy based on a grating pair
作者: Gao, P (Gao, Peng); Yao, BL (Yao, Baoli); Harder, I (Harder, Irina); Min, JW (Min, Junwei); Guo, RL (Guo, Rongli); Zheng, JJ (Zheng, Juanjuan); Ye, T (Ye, Tong)
来源出版物: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION  卷: 28  期: 3  页: 434-440  DOI: 10.1364/JOSAA.28.000434  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 11
摘要: An optical configuration for parallel two-step phase-shifting digital holographic microscopy (DHM) based on a grating pair is proposed for the purpose of real-time phase microscopy. Orthogonally circularly polarized object and reference waves are diffracted twice by a pair of gratings, and two parallel copies for each beams come into being. Combined with polarization elements, parallel two-step phase-shifting holograms are obtained. Based on the proposed configuration, two schemes of DHM, i.e., slightly off-axis and on-axis DHM, have been implemented. The slightly off-axis DHM suppresses the dc term by subtracting the two phase-shifting holograms from each other, thus the requirement on the off-axis angle and sampling power of the CCD camera is reduced greatly. The on-axis DHM has the least requirement on the resolving power of the CCD camera, while it requires that the reference wave is premeasured and its intensity is no less than 2 times the maximal intensity of the object wave. (C) 2011 Optical Society of America
PubMed ID: 21383826
文献类型: Article
KeyWords Plus: ZERO-ORDER; MEASURING INTERFEROMETRY; 4 INTERFEROGRAMS; IMAGE-FORMATION; COMMON-PATH; POLARIZATION; DYNAMICS; SUPPRESSION; MODULATION; CELLS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 730DI
ISSN: 1084-7529
________________________________________
第 162 条,共 209 条
标题: A fast and low complexity approach for H.264/AVC intra mode decision
作者: Su, XQ (Su, XiuQin); Ji, L (Ji, Lei); Li, XA (Li, Xiang)
来源出版物: MULTIMEDIA TOOLS AND APPLICATIONS  卷: 52  期: 1  页: 65-76  DOI: 10.1007/s11042-009-0452-z  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: As one of the main features of H.264/AVC, intra prediction coding technique acts as a basis for encoding performance and efficiency. In official reference software Joint Model (JM), it employs the rate distortion optimization (RDO) technique to get to the best encoding performance. By full searching (FS) all of the candidate modes under the rule of RDO, peak-signal-noise-rate (PSNR) decreases to a very low level, but at the same time, the complexity of calculation increases a lot. Many researchers had devoted to searching the fast algorithm which can decrease the complexity, and had designed so many excellent and intelligent fast algorithms. In this paper we introduced a low complexity and fast approach for H.264/AVC intra prediction algorithm. The new approach is based on reducing the number of candidate modes for further RDO calculation, and decreasing the computational complicacy. It can decide the interpolation direction accurately by calculating the directional pixel-value differences (DPD) of target block, and then do statistic with the obtained values to choose the most probable modes. The experimental results demonstrate that the proposed algorithm can achieve more than 70% time saving than JM, but only a tiny degradation of encoding performance is brought in.
文献类型: Article; Proceedings Paper
会议名称: 2nd International Congress on Image and Signal Processing
会议日期: OCT 17-19, 2009
会议地点: Tianjin, PEOPLES R CHINA
作者关键词: H,264/AVC; DPD; Intra prediction; Fast algorithm
KeyWords Plus: PREDICTION
Web of Science 类别: Computer Science, Information Systems; Computer Science, Software Engineering; Computer Science, Theory & Methods; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 716RF
ISSN: 1380-7501
________________________________________
第 163 条,共 209 条
标题: Fabrication and characterization of a water-free mid-infrared fluorotellurite glass
作者: Lin, AX (Lin, Aoxiang); Ryasnyanskiy, A (Ryasnyanskiy, Aleksandr); Toulouse, J (Toulouse, Jean)
来源出版物: OPTICS LETTERS  卷: 36  期: 5  页: 740-742  DOI: 10.1364/OL.36.000740  出版年: MAR 1 2011 
Web of Science 核心合集中的 "被引频次": 26
被引频次合计: 26
摘要: Using a physical and chemical dehydration technique and a high-pressure, ultradry O-2 atmosphere in a semiclosed steel-chamber furnace, we fabricated a group of fluorotellurite glasses with a composition of (90-x)TeO2-xZnF(2)-10Na(2)O (mol.%, x 0-30). For x 30, no OH absorption was observed in the range of 0.38-6.1 mu m. This is the first report of a water-free mid-IR fluorotellurite glass, to our knowledge, offering the common advantages of a robust oxide glass and an IR-transparent fluoride one. Besides optimized linear transmittance and absorption, the nonlinear refractive indices and Raman gain coefficients are reduced. These results are discussed in the context of mid-IR high-power laser generation and transmission. (C) 2011 Optical Society of America
PubMed ID: 21368967
文献类型: Article
KeyWords Plus: RAMAN GAIN; OPTICAL-FIBER; TELLURITE
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 728ZH
ISSN: 0146-9592
________________________________________
第 164 条,共 209 条
标题: Spectral Discrimination Method Information Divergence Combined with Gradient Angle
作者: Zhang, XB (Zhang Xiu-bao); Yuan, Y (Yuan Yan); Jing, JJ (Jing Juan-juan); Sun, CM (Sun Cheng-ming); Wang, QA (Wang Qian)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 3  页: 853-857  DOI: 10.3964/j.issn.1000-0593(2011)03-0853-05  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The present paper proposes a spectral discrimination method combining spectral information divergence with spectral gradient angle (SIDX tan(SGA(pi/2))) which overcomes the shortages of the existing methods which can not take the whole spectral shape and local characteristics into account simultaneously. Using the simulation spectra as input data, according to the inter-ferogram acquirement principle and spectrum recovery algorithm of the temporally and spatially modulated Fourier transform imaging spectrometer (TSMFTIS), we simulated the distortion spectra recovery process of the TMSFTIS in different maximum mix ratio and distinguished the difference between the recovered spectra and the true spectrum by different spectral discrimination methods. The experiment results show that the SID X tan(SGA(pi/2)) can not only identify the similarity of the whole spectral shapes, but also distinguish local differences of the spectral characteristics. A comparative study was conducted among the different discrimination methods. The results have validated that the SIDX tan(SGA(pi/2)) has a significant improvement in the discriminatory ability.
文献类型: Article
作者关键词: Spectral discrimination method; Information divergence; Gradient angle; Temporally and spatially modulated fourier transform imaging spectrometer
KeyWords Plus: IMAGING SPECTROMETER; HYPERSPECTRAL DATA; DATA-COMPRESSION; SIMULATION
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 729XH
ISSN: 1000-0593
________________________________________
第 165 条,共 209 条
标题: Summarizing tourist destinations by mining user-generated travelogues and photos
作者: Pang, YW (Pang, Yanwei); Hao, QA (Hao, Qiang); Yuan, YA (Yuan, Yuan); Hu, TJ (Hu, Tanji); Cai, R (Cai, Rui); Zhang, L (Zhang, Lei)
来源出版物: COMPUTER VISION AND IMAGE UNDERSTANDING  卷: 115  期: 3  特刊: SI  页: 352-363  DOI: 10.1016/j.cviu.2010.10.010  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 24
被引频次合计: 24
摘要: Automatically summarizing tourist destinations with both textual and visual descriptions is highly desired for online services such as travel planning, to facilitate users to understand the local characteristics of tourist destinations. Travelers are contributing a great deal of user-generated travelogues and photos on the Web, which contain abundant travel-related information and cover various aspects (e.g., landmarks, styles, activities) of most locations in the world. To leverage the collective knowledge of travelers for destination summarization, in this paper we propose a framework which discovers location-representative tags from travelogues and then select relevant and representative photos to visualize these tags. The learnt tags and selected photos are finally organized appropriately to provide an informative summary which describes a given destination both textually and visually. Experimental results based on a large collection of travelogues and photos show promising results on destination summarization. (C) 2010 Elsevier Inc. All rights reserved.
文献类型: Article
作者关键词: Travelogue mining; Destination summarization; User-generated content; Virtual tour
KeyWords Plus: IMAGE RETRIEVAL; RELEVANCE
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 727BN
ISSN: 1077-3142
________________________________________
第 166 条,共 209 条
标题: Aurora image segmentation by combining patch and texture thresholding
作者: Gao, XB (Gao, Xinbo); Fu, R (Fu, Rong); Li, XL (Li, Xuelong); Tao, DC (Tao, Dacheng); Zhang, BC (Zhang, Beichen); Yang, HG (Yang, Huigen)
来源出版物: COMPUTER VISION AND IMAGE UNDERSTANDING  卷: 115  期: 3  特刊: SI  页: 390-402  DOI: 10.1016/j.cviu.2010.11.011  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: The proportion of aurora to the field-of-view in temporal series of all-sky images is an important index to investigate the evolvement of aurora. To obtain such an index, a crucial phase is to segment the aurora from the background of sky. A new aurora segmentation approach, including a feature extraction method and the segmentation algorithm, is presented in this paper. The proposed feature extraction method, called adaptive local binary patterns (ALBP), selects the frequently occurred patterns to construct the main pattern set, which avoids using the same pattern set to describe different texture structures in traditional local binary patterns. According to the different morphologies and different semantics of aurora, the segmentation algorithm is designed into two parts, texture part segmentation based on ALBP features and patch part segmentation based on modified Otsu method. As it is simple and efficient, our implementation is suitable for large-scale datasets. The experiments exhibited the segmentation effect of the proposed method is satisfactory from human visual aspect and segmentation accuracy. (C) 2010 Elsevier Inc. All rights reserved.
文献类型: Article
作者关键词: Image segmentation; Feature extraction; LBP; Aurora; Texture segmentation; Otsu; Patch segmentation
KeyWords Plus: LOCAL BINARY PATTERNS; ROTATION-INVARIANT; ACTIVE CONTOURS; CLASSIFICATION; SCALE
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 727BN
ISSN: 1077-3142
________________________________________
第 167 条,共 209 条
标题: Adaptively Learning Local Shape Statistics for Prostate Segmentation in Ultrasound
作者: Yan, PK (Yan, Pingkun); Xu, S (Xu, Sheng); Turkbey, B (Turkbey, Baris); Kruecker, J (Kruecker, Jochen)
来源出版物: IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING  卷: 58  期: 3  页: 633-641  DOI: 10.1109/TBME.2010.2094195  子辑: 1  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 11
被引频次合计: 12
摘要: Automatic segmentation of the prostate from 2-D transrectal ultrasound (TRUS) is a highly desired tool in many clinical applications. However, it is a very challenging task, especially for segmenting the base and apex of the prostate due to the large shape variations in those areas compared to the midgland, which leads many existing segmentation methods to fail. To address the problem, this paper presents a novel TRUS video segmentation algorithm using both global population-based and patient-specific local shape statistics as shape constraint. By adaptively learning shape statistics in a local neighborhood during the segmentation process, the algorithm can effectively capture the patient-specific shape statistics and quickly adapt to the local shape changes in the base and apex areas. The learned shape statistics is then used as the shape constraint in a deformable model for TRUS video segmentation. The proposed method can robustly segment the entire gland of the prostate with significantly improved performance in the base and apex regions, compared to other previously reported methods. Our method was evaluated using 19 video sequences obtained from different patients and the average mean absolute distance error was 1.65 +/-.0.47 mm.
PubMed ID: 21097373
文献类型: Article
作者关键词: Deformable model; prostate; segmentation; shape statistics; transrectal ultrasound (TRUS)
KeyWords Plus: BOUNDARY SEGMENTATION; IMAGES; POPULATION; TRACKING; MODELS
Web of Science 类别: Engineering, Biomedical
研究方向: Engineering
IDS 号: 725QW
ISSN: 0018-9294
________________________________________
第 168 条,共 209 条
标题: Femtosecond laser machining characteristics in a single-crystal superalloy
作者: Zhang, W (Zhang Wei); Cheng, GH (Cheng Guanghua); Feng, Q (Feng Qiang); Cao, LM (Cao Lamei)
来源出版物: RARE METALS  卷: 30  特刊: SI  页: 639-642  DOI: 10.1007/s12598-011-0362-z  增刊: 1  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Femtosecond laser machining characteristics of a nickel-base single-crystal superalloy were investigated as a function of laser fluence and the number of laser pulses. The significant decrease of recast layer for femtosecond laser machining was observed compared with that for nanosecond laser machining. The ablation thresholds for 1, 10, and 100 femtosecond pulse exposure were measured. Two ablation regions of the ablated crater were observed. The change of the ablation diameter and depth depended on the laser fluence and the number of laser pulses. And higher laser fluence could enable a faster rate of laser-machining.
文献类型: Article
作者关键词: femtosecond laser; nanosecond laser; machining; threshold; single-crystal superalloy
KeyWords Plus: ABLATION; PICOSECOND; SURFACES; SILICON; PULSES; DAMAGE; FILMS
Web of Science 类别: Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
研究方向: Materials Science; Metallurgy & Metallurgical Engineering
IDS 号: 930GS
ISSN: 1001-0521
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第 169 条,共 209 条
标题: A signal to noise ratio measurement for single shot laser pulses by use of an optical Kerr gate
作者: He, JF (He, Junfang); Zhu, CJ (Zhu, Changjun); Wang, YS (Wang, Yishan); Cheng, GH (Cheng, Guanghua); Zou, KS (Zou, Kuaisheng); Wu, DK (Wu, Dengke); Xie, XD (Xie, Xudong)
来源出版物: OPTICS EXPRESS  卷: 19  期: 5  页: 4438-4443  DOI: 10.1364/OE.19.004438  出版年: FEB 28 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: A new design of signal to noise ratio (SNR) measurement for single shot laser pulses, based on a stepped grating and an optical Kerr gate (OKG), is presented. A single shot laser pulse was simultaneously divided into multi-pulses in both time and space. Intensity-space distribution of laser multi-pulses, which was recorded with a CCD detector, was transformed into intensity-time distribution. Time resolution of 1.95 ps and detection time range of 42.9 ps were obtained, respectively. Moreover, optical spatial localization attenuators were introduced into optical path to acquire wide dynamic range in the SNR measurement and, as a result, the dynamic range has been extended remarkably. (C) 2011 Optical Society of America
PubMed ID: 21369275
文献类型: Article
KeyWords Plus: RESOLVED LUMINESCENCE SPECTROSCOPY; ULTRAFAST RELAXATION PROCESSES; CONTRAST MEASUREMENTS; LIGHT-PULSES; INTENSITY; CORRELATOR; AMPLIFIER
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 741NL
ISSN: 1094-4087
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第 170 条,共 209 条
标题: Dual-wavelength step-like pulses in an ultra-large negative-dispersion fiber laser
作者: Mao, D (Mao, Dong); Liu, XM (Liu, Xueming); Wang, LR (Wang, Leiran); Lu, H (Lu, Hua); Duan, LN (Duan, Lina)
来源出版物: OPTICS EXPRESS  卷: 19  期: 5  页: 3996-4001  DOI: 10.1364/OE.19.003996  出版年: FEB 28 2011 
Web of Science 核心合集中的 "被引频次": 17
被引频次合计: 18
摘要: We report on experimental observation of dual-wavelength steplike pulses delivered from an erbium-doped fiber laser operating in ultralarge negative-dispersion regime. The step-like pulses consist of two rectangular pulses with different energies, durations as well as optical spectra, and are distinct from the conventional multi-solitons or bound-state solitons in that each pulse holds the same property. We find the weaker (or stronger) rectangular pulse in step-like pulses is more sensitive to the backward (or forward) pump while is less sensitive to the forward (or backward) pump. Our results demonstrate that the dual-wavelength operation results from the combination of fiber dispersion, fiber birefringence, as well as cavity filtering effect, and the intensity difference between rectangular pulses can be attributed to different gain characteristics of the forward and backward pump. (C) 2011 Optical Society of America
PubMed ID: 21369226
文献类型: Article
KeyWords Plus: RING LASER; GENERATION; TRANSMISSION; OPERATION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 741NL
ISSN: 1094-4087
________________________________________
第 171 条,共 209 条
标题: Abrupt transition from wavelength structure to subwavelength structure in a single-crystal superalloy induced by femtosecond laser
作者: Zhang, W (Zhang, Wei); Cheng, GH (Cheng, Guanghua); Feng, QA (Feng, Qiang); Cao, LM (Cao, Lamei); Wang, FP (Wang, Fengping); Hui, RQ (Hui, Rongqing)
来源出版物: APPLIED SURFACE SCIENCE  卷: 257  期: 9  页: 4321-4324  DOI: 10.1016/j.apsusc.2010.12.050  出版年: FEB 15 2011 
Web of Science 核心合集中的 "被引频次": 9
被引频次合计: 9
摘要: The abrupt transition from low-spatial-frequency laser-induced periodic surface structure (LSFL) to high-spatial-frequency laser-induced periodic surface structure (HSFL) in single-crystal superalloy CMSX-4 during femtosecond laser irradiation has been reported. Microstructural investigations indicate that the transition was initiated by the generation of new grooves on the main ridges of LSFL ripples. This transition resulted in the period of HSFL nearly equal to half of LSFL period. Furthermore, the relationship between both LSFL and HSFL and their parametric dependence was established. The microstructural observation of the abrupt transition provides a morphological evidence of second harmonic generation being responsible for the formation of HSFL. (c) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Femtosecond laser; Microstructure; Abrupt transition; Second harmonic generation
KeyWords Plus: PULSES; SURFACES
Web of Science 类别: Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
研究方向: Chemistry; Materials Science; Physics
IDS 号: 709RR
ISSN: 0169-4332
电子 ISSN: 1873-5584
________________________________________
第 172 条,共 209 条
标题: General coupled-mode analysis for gain-guided, index-antiguided fibers, and index-guided fibers
作者: Zhou, EY (Zhou, Enyu); Yan, KL (Yan, Kunlun); Zhao, BY (Zhao, Baoyin); Wang, YS (Wang, Yishan); Wei, W (Wei, Wei); Peng, B (Peng, Bo)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 4  页: 1034-1037  DOI: 10.1016/j.optcom.2010.10.067  出版年: FEB 15 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: Coupling properties of two gain-guided index-antiguided (GG + IAG) fibers or GG+IAG fibers and index-guided (IG) fibers were investigated by the further general coupled mode theory The theory can explain any situation of two fiber coupling The interesting results were obtained by the numerical computation method For two GG + IAG fiber coupling total power was decreased as rising real-valued refractive-index difference (real part of refractive-index difference between core and cladding RVRID) while the power of one GG + IAG fiber was damped oscillations with Increased core separation In the GG + IAG fiber and IG fiber coupler the variation of the RVRID could change coupling characteristics These results are different from two IG fibers coupling and the general coupled-mode theory may provide meaningful references for new concepts of directional coupler and pumping technology of GG+IAG fiber Crown Copynght (C) 2010 Published by Elsevier BV All rights reserved
文献类型: Article
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 701YL
ISSN: 0030-4018
________________________________________
第 173 条,共 209 条
标题: Ultrafast all-optical switching in nanoplasmonic waveguide with Kerr nonlinear resonator
作者: Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Wang, LR (Wang, Leiran); Gong, YK (Gong, Yongkang); Mao, D (Mao, Dong)
来源出版物: OPTICS EXPRESS  卷: 19  期: 4  页: 2910-2915  DOI: 10.1364/OE.19.002910  出版年: FEB 14 2011 
Web of Science 核心合集中的 "被引频次": 49
被引频次合计: 50
摘要: A novel ultrafast all-optical switching based on metal-insulator-metal nanoplasmonic waveguide with a Kerr nonlinear resonator is proposed and investigated numerically. With the finite-difference time-domain simulations, it is demonstrated that an obvious optical bistability of the signal light appears by varying the control-light intensity, and an excellent switching effect is achieved. This bistability originates from the intensity-dependent change induced in the dielectric constant of Kerr nonlinear material filled in the nanodisk resonator. It is found that the proposed all-optical switching exhibits femtosecond-scale feedback time. (C) 2011 Optical Society of America
PubMed ID: 21369113
文献类型: Article
KeyWords Plus: PLASMON-POLARITONS; METAL; FILTERS; TRANSMISSION; BISTABILITY; MICROCAVITY; CRYSTALS; ARRAYS; CAVITY; FILMS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 741JM
ISSN: 1094-4087
________________________________________
第 174 条,共 209 条
标题: Tunable multi-channel wavelength demultiplexer based on MIM plasmonic nanodisk resonators at telecommunication regime
作者: Wang, GX (Wang, Guoxi); Lu, H (Lu, Hua); Liu, XM (Liu, Xueming); Mao, D (Mao, Dong); Duan, LN (Duan, Lina)
来源出版物: OPTICS EXPRESS  卷: 19  期: 4  页: 3513-3518  DOI: 10.1364/OE.19.003513  出版年: FEB 14 2011 
Web of Science 核心合集中的 "被引频次": 56
被引频次合计: 57
摘要: The tunable multi-channel wavelength demultiplexer (WDM) based on metal-insulator-metal plasmonic nanodisk resonators is designed and numerically investigated by utilizing Finite-Difference Time-Domain (FDTD) simulations. It is found that the channel wavelength of WDM is easily tuned by changing the geometrical parameters of the structure and the material filled in the nanodisk resonator. The multi-channel WDM structure consisting of a plasmonic waveguide and several nanodisk resonators increases the transmission up to 70% at telecommunication regime, which is two times higher than the results reported in a recent literature [Opt. Express 18, 11111 (2010)]. Our WDM can find important potential applications in highly integrated optical circuits. (C) 2011 Optical Society of America
PubMed ID: 21369174
文献类型: Article
KeyWords Plus: WAVE-GUIDE FILTERS; METAL; POLARITONS; LIGHT
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 741JM
ISSN: 1094-4087
________________________________________
第 175 条,共 209 条
标题: Video-rate wide-field coherent anti-Stokes Raman scattering microscopy with collinear nonphase-matching illumination
作者: Lei, M (Lei, Ming); Winterhalder, M (Winterhalder, Martin); Selm, R (Selm, Romedi); Zumbusch, A (Zumbusch, Andreas)
来源出版物: JOURNAL OF BIOMEDICAL OPTICS  卷: 16  期: 2  文献号: 021102  DOI: 10.1117/1.3533707  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: A simple scheme for video-rate wide-field coherent anti-Stokes Raman scattering (CARS) microscopy is presented. The method is based on collinear nonphase-matching illumination. The mechanisms leading to CARS signal generation are investigated. We find that refraction-mediated phase-matching is the main effect. Video-rate wide-field CARS microscopy of polystyrene beads and CARS wide-field images of C. elegans embryos are shown, and the capabilities and the limitations of the scheme are discussed. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI:10.1117/1.3533707]
PubMed ID: 21361665
文献类型: Article
作者关键词: coherent anti-Stokes Raman scattering microscopy; wide field; video-rate
KeyWords Plus: CARS-MICROSCOPY
Web of Science 类别: Biochemical Research Methods; Optics; Radiology, Nuclear Medicine & Medical Imaging
研究方向: Biochemistry & Molecular Biology; Optics; Radiology, Nuclear Medicine & Medical Imaging
IDS 号: 742JW
ISSN: 1083-3668
________________________________________
第 176 条,共 209 条
标题: Ghosting phenomena in single photon counting imagers with Vernier anode
作者: Yang, H (Yang, Hao); Zhao, BS (Zhao, Baosheng); Yan, QR (Yan, Qiurong); Liu, YA (Liu, Yong'an); Hu, HJ (Hu, Huijun)
来源出版物: REVIEW OF SCIENTIFIC INSTRUMENTS  卷: 82  期: 2  文献号: 023110  DOI: 10.1063/1.3544018  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: We provide the ghosting theory of two-dimensional Vernier anode based imagers. The single photon counting detection system based on Vernier anode is constructed. The ghosting, which occurs during the decoding of two-dimensional Vernier anode, and its possible solutions are described in detail. On the basis of the discussion of the decoding algorithm, the ghosting theoretical model is established. Phase conditions on which imaging ghosting can be avoided and the probability distribution function are proposed; the root causes of ghosting of two-dimensional Vernier anode are also discussed. (C) 2011 American Institute of Physics. [doi:10.1063/1.3544018]
PubMed ID: 21361576
文献类型: Article
KeyWords Plus: IMAGING-SYSTEM; STRIP ANODES; RESOLUTION; DETECTOR; EUV
Web of Science 类别: Instruments & Instrumentation; Physics, Applied
研究方向: Instruments & Instrumentation; Physics
IDS 号: 727PM
ISSN: 0034-6748
电子 ISSN: 1089-7623
________________________________________
第 177 条,共 209 条
标题: A Sub-pixel Centroid Algorithm for Star Image Based on Gaussian Distribution
作者: Sun, J (Sun, Jing); Li, GR (Li, Guangrui); Wen, DS (Wen, Desheng); Xue, B (Xue, Bin); Yang, SD (Yang, Shaodong)
来源出版物: TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES  卷: 53  期: 182  页: 307-310  DOI: 10.2322/tjsass.53.307  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A novel centroid algorithm is proposed to acquire better centroid performance in a star image. Since photons incident on pixels of stars present a Gaussian point spread function (PSF), so, the centroid locations on the x and y-axis are calculated using the pixel intensity ratio and expand the Gaussian PSF to polynomials with respect to the centroid location. The angular separation error between star pairs is used to verify the proposed algorithm indirectly. The result clearly shows that the centroid accuracy achieves 1/33 of a pixel and is about two times better than the moment method, indicating the new algorithm is effective.
文献类型: Article
作者关键词: Sub-pixel Centroid Algorithm; Gaussian PSF; Star Image Processing; CCD Camera
Web of Science 类别: Engineering, Aerospace
研究方向: Engineering
IDS 号: 727DL
ISSN: 0549-3811
________________________________________
第 178 条,共 209 条
标题: Confocal Fabry-Perot interferometer for frequency stabilization of laser
作者: Pana, HJ (Pana, H-J); Ruan, P (Ruan, P.); Wang, HW (Wang, H. -W.); Li, F (Li, F.)
来源出版物: LASER PHYSICS  卷: 21  期: 2  页: 336-339  DOI: 10.1134/S1054660X11030170  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The frequency shift of laser source of Doppler lidar is required in the range of a few megahertzs. To satisfy this demand, a confocal Fabry-Perot (F-P) interferometer was manufactured as the frequency standard for frequency stabilization. After analyzing and contrasting the center frequency shift of confocal Fabry-Perot interferometers that are made of three different types of material with the change of temperature, the zerodur material was selected to fabricate the interferometer, and the cavity mirrors were optically contacted onto the end of spacer. The confocal Fabry-Perot interferometer was situated within a double-walled chamber, and the change of temperature in the chamber was less than 0.01 K. The experimental results indicate that the free spectral range is 500 MHz, the full-width at half maximum is 3.33 MHz, and the finesse is 150.
文献类型: Article
KeyWords Plus: LASING CHARACTERISTICS; CONTINUOUS-WAVE; CAVITY; CRYSTALS; LINE; NM
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 723RZ
ISSN: 1054-660X
________________________________________
第 179 条,共 209 条
标题: Generation of 10-GHz ultra-short pulses with low time jitter in an actively mode-locked fiber laser
作者: Feng, H (Feng, H.); Zhao, W (Zhao, W.); Yan, S (Yan, S.); Xie, XP (Xie, X. P.)
来源出版物: LASER PHYSICS  卷: 21  期: 2  页: 404-409  DOI: 10.1134/S1054660X11030017  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 10
摘要: We have experimentally achieved the 8.3-ps ultra-short pulse at 10 GHz repetition rate with the time jitter as low as 590 fs in an actively mode-locked fiber ring laser. The ring-cavity laser is mode-locked by a semiconductor optical amplifier based on cross-gain modulation. The external CW source is modulated with radio frequency signal by an amplitude modulator as the external optical pulses and, then, injected into the fiber ring cavity to achieve active mode locking. Further investigating the laser output characteristics, it indicates that the linewidth of employed CW source affects properties of the generated ultra-short pulse, such as phase noise and time jitter. Ultra-short pulse at high repetition rate with low time jitter can be generated by the optimization of CW laser source.
文献类型: Article
KeyWords Plus: SEMICONDUCTOR OPTICAL AMPLIFIER; RING LASER; NORMAL-DISPERSION; REPETITION-RATE; LINEWIDTH MEASUREMENTS; 10 GHZ; MODULATION; SOA; POLARIZATION; OUTPUT
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 723RZ
ISSN: 1054-660X
________________________________________
第 180 条,共 209 条
标题: Image reconstruction by an alternating minimisation
作者: Lu, XQ (Lu, Xiaoqiang); Sun, Y (Sun, Yi); Yuan, YA (Yuan, Yuan)
来源出版物: NEUROCOMPUTING  卷: 74  期: 5  页: 661-670  DOI: 10.1016/j.neucom.2010.08.003  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 3
摘要: This paper focuses on the problem of incomplete data in the applications of the circular cone-beam computed tomography. This problem is frequently encountered in medical imaging sciences and some other industrial imaging systems. For example, it is crucial when the high density region of objects can only be penetrated by X-rays in a limited angular range. As the projection data are only available in an angular range, the above mentioned incomplete data problem can be attributed to the limited angle problem, which is an ill-posed inverse problem. This paper reports a modified total variation minimisation method to reduce the data insufficiency in tomographic imaging. This proposed method is robust and efficient in the task of reconstruction by showing the convergence of the alternating minimisation method. The results demonstrate that this new reconstruction method brings reasonable performance. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Limited angle tomography; III-posed inverse problem; Total variation (TV)
KeyWords Plus: LIMITED-ANGLE TOMOGRAPHY; X-RAY TOMOGRAPHY; STATISTICAL INVERSION; COMPUTED-TOMOGRAPHY; PROJECTIONS; RADIOGRAPHS; ALGORITHMS; RESTORATION; RECOVERY; VIEWS
Web of Science 类别: Computer Science, Artificial Intelligence
研究方向: Computer Science
IDS 号: 718FI
ISSN: 0925-2312
________________________________________
第 181 条,共 209 条
标题: Effect of polarization on the evolution of electromagnetic hollow Gaussian Schell-model beam
作者: Long, XW (Long, Xuewen); Lu, KQ (Lu, Keqing); Zhang, YH (Zhang, Yuhong); Guo, JB (Guo, Jianbang); Li, KH (Li, Kehao)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 3  页: 715-718  DOI: 10.1016/j.optcom.2010.09.078  出版年: FEB 1 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Based on the theory of coherence an analytical propagation formula for partially polarized and partially coherent hollow Gaussian Schell-model beams (HGSMBs) passing through a paraxial optical system is derived Furthermore we show that the degree of polarization of source may affect the evolution of HGSMBs and a tunable dark region may exist For two special cases of fully coherent and partially coherent delta(xx)=delta(yy) normalized intensity distributions are independent of the polarization of source (C) 2010 Elsevier B V All rights reserved
文献类型: Article
作者关键词: Schell model sources; Hollow Gaussian beams; Degree of polarization; Propagation
KeyWords Plus: LASER-BEAM; FAR-FIELD; PROPAGATION; GENERATION; AXICON; LIGHT
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 699QT
ISSN: 0030-4018
________________________________________
第 182 条,共 209 条
标题: Unidirectional manipulation of surface plasmon polariton by dual-nanocavity in a T-shaped waveguide
作者: Gong, YK (Gong, Yongkang); Liu, XM (Liu, Xueming); Wang, LR (Wang, Leiran); Zhang, YN (Zhang, Yani)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 3  页: 795-798  DOI: 10.1016/j.optcom.2010.09.074  出版年: FEB 1 2011 
Web of Science 核心合集中的 "被引频次": 11
被引频次合计: 12
摘要: A structure of two dimensional T-shaped metal-insulator-metal waveguide with dual-nanocavity is proposed The two nanocavities located at each side of the slit on the lower metallic surface act as band rejection filters and are capable of stopping the surface plasmon polaritons (SPPs) at the resonant wavelengths The Fabry-Perot interferometry theory and the Finite-Difference-Time-Domain method are utilized to investigate the proposed waveguide The numerical results demonstrate the realization of miniaturized photonic devices for effectively switching the SPPs propagation between the left and right waveguides in one direction (C) 2010 Elsevier B V All rights reserved
文献类型: Article
作者关键词: Surface plasmon polaritons; Integrated optics; Waveguide
KeyWords Plus: SUBWAVELENGTH HOLE ARRAYS; FILTER; METAL; NANOLITHOGRAPHY; GRATINGS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 699QT
ISSN: 0030-4018
________________________________________
第 183 条,共 209 条
标题: Biologically Inspired Features for Scene Classification in Video Surveillance
作者: Huang, KQ (Huang, Kaiqi); Tao, DC (Tao, Dacheng); Yuan, YA (Yuan, Yuan); Li, XL (Li, Xuelong); Tan, TN (Tan, Tieniu)
来源出版物: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS  卷: 41  期: 1  页: 307-313  DOI: 10.1109/TSMCB.2009.2037923  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 21
被引频次合计: 22
摘要: Inspired by human visual cognition mechanism, this paper first presents a scene classification method based on an improved standard model feature. Compared with state-of-the-art efforts in scene classification, the newly proposed method is more robust, more selective, and of lower complexity. These advantages are demonstrated by two sets of experiments on both our own database and standard public ones. Furthermore, occlusion and disorder problems in scene classification in video surveillance are also first studied in this paper.
PubMed ID: 20100675
文献类型: Article
作者关键词: Biologically inspired; scene classification; video surveillance
KeyWords Plus: DISCRIMINANT-ANALYSIS; RECOGNITION; CATEGORIES; SYSTEM
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics
研究方向: Automation & Control Systems; Computer Science
IDS 号: 708TX
ISSN: 1083-4419
________________________________________
第 184 条,共 209 条
标题: A simulation experiment system for X-ray pulsar based navigation
作者: Hu, HJ (Hu Hui-Jun); Zhao, BS (Zhao Bao-Sheng); Sheng, LZ (Sheng Li-Zhi); Yan, QR (Yan Qiu-Rong)
来源出版物: ACTA PHYSICA SINICA  卷: 60  期: 2  文献号: 029701  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 14
摘要: A simulation experiment system for X-ray pulsar based navigation is setup in order to study the key technologies of Xray pulsar navigation. The system consists of X-ray pulsar source generator, super sensitive X-ray photon counting detector, charge sensitive amplifier, shaping amplifier, time measurement, X-ray pulse profile reconstruction and pulse time of arrival (TOA) measurement. The system can simulate the X-ray pulsar source with different intensities, period and pulse profile. The TOA of individual X-ray photon is recorded, the pulse profile is reconstructed with these data. And by comparing the measured pulse profile with the standard pulse profile of the X-ray pulsar source generator, the pulse TOA is calculated. The construction and the principle of the simulation experiment system are introduced and experiment results are presented.
文献类型: Article
作者关键词: pulsar navigation; micro-channel plate photon counting detector; pulsar profile
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 729JY
ISSN: 1000-3290
________________________________________
第 185 条,共 209 条
标题: Synthesis, Crystal Structure and Optical Properties of Europium Trifluoroacetate Complexes with 1,10-Phenanthroline and 2,2 '-Bipyridine
作者: She, JB (She Jiangbo); Cui, XX (Cui Xiaoxia); Hou, CQ (Hou Chaoqi); Gao, C (Gao Chao); Wei, W (Wei Wei); Peng, B (Peng Bo)
来源出版物: CHINESE JOURNAL OF CHEMISTRY  卷: 29  期: 2  页: 267-272  DOI: 10.1002/cjoc.201190076  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Two europium trifluoroacetate complexes, Eu(CF3COO)(3)center dot phen (1) and Eu(CF3COO)(3)center dot bpy (2) (where phen=1,10-phenanthroline, bpy=2,2'-bipyridine), were synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectroscopy and thermogravimetric analysis (TA). Single-crystal X-ray structure has been determined for the complex [Eu-2(CF3COO)(6)center dot(phen)(3)center dot(H2O)(2)]center dot EtOH. The crystal structure of [Eu-2(CF3COO)(6)center dot(phen)(3)center dot(H2O)(2)]center dot EtOH shows that two different coordination styles with europium ions coexist in the same crystal and have entirely different coordination geometries and numbers. This crystal can be considered as an 1 : 1 adduct of [Eu(CF3COO)(3)center dot(Phen)(2)center dot H2O]center dot EtOH (9-coordination part) and Eu(CF3COO)(3)center dot phen center dot H2O (8-coordination part). The excitation spectra of the two complexes demonstrate that the energy collected by "antenna ligands" is transferred to Eu3+ ions efficiently. The room-temperature PL spectra of the complexes are composed of the typical Eu3+ ions red emission, due to transitions between D-5(0) -> F-7(J(J=0 -> 4)). The lifetimes of D-5(0) of Eu3+ in the complexes were examined using time-resolved spectroscopic analysis, and the lifetime values of Eu(CF3COO)(3)center dot phen and Eu(CF3COO)(3)center dot bpy were fitting with bi-exponential (2987 and 353 mu s) and monoexponential (3191 mu s) curves, respectively. In order to elucidate the energy transfer process of the europium complexes, the energy levels of the relevant electronic states had been estimated. The thermal analyses indicate that they are all quite stable to heat.
文献类型: Article
作者关键词: europium complex; luminescent property; Judd-Ofelt theory; thermal decomposition; structure elucidation; lanthanides
KeyWords Plus: LIGAND; IONS; SPECTROSCOPY; LUMINESCENCE; INTENSITIES; SPECTRA; EU3+
Web of Science 类别: Chemistry, Multidisciplinary
研究方向: Chemistry
IDS 号: 727RU
ISSN: 1001-604X
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第 186 条,共 209 条
标题: Distributed Temperature Sensing System Based on Rayleigh Scattering BOTDA
作者: Cui, QS (Cui, Qingsong); Pamukcu, S (Pamukcu, Sibel); Lin, AX (Lin, Aoxiang); Xiao, W (Xiao, Wen); Herr, D (Herr, Douglas); Toulouse, J (Toulouse, Jean); Pervizpour, M (Pervizpour, Mesut)
来源出版物: IEEE SENSORS JOURNAL  卷: 11  期: 2  页: 399-403  DOI: 10.1109/JSEN.2010.2066558  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 6
摘要: A distributed temperature sensor based on Rayleigh scattering Brillouin optical time domain analysis (Rayleigh-BOTDA) is proposed in this paper. The sensor uses Rayleigh backscattering effect of microwave modulated pulse base sidebands as probe wave and a high sensitive photon counting detector for Brillouin signal intensity detection. Compared with a conventional BOTDA system, the Rayleigh-BOTDA effectively suppresses polarization-induced signal fluctuation resulting in improved signal intensity. The experimental scheme presented is simplified by using a single laser with one-end access. The temperature accuracy of the new sensing system was demonstrated as 1 degrees C on spatial resolution of 3 m.
文献类型: Article
作者关键词: Fiber optic sensor; frequency modulation; photon counting detector; stimulated Brillouin scattering
KeyWords Plus: STIMULATED BRILLOUIN-SCATTERING; GAIN SPECTRUM ANALYSIS; SINGLE-MODE FIBERS; POLARIZATION PROPERTIES; OPTICAL-FIBER; SENSOR
Web of Science 类别: Engineering, Electrical & Electronic; Instruments & Instrumentation; Physics, Applied
研究方向: Engineering; Instruments & Instrumentation; Physics
IDS 号: 681ZS
ISSN: 1530-437X
________________________________________
第 187 条,共 209 条
标题: Learning Similarity With Multikernel Method
作者: Tang, Y (Tang, Yi); Li, LQ (Li, Luoqing); Li, XL (Li, Xuelong)
来源出版物: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS  卷: 41  期: 1  页: 131-138  DOI: 10.1109/TSMCB.2010.2048312  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 8
被引频次合计: 8
摘要: In the field of machine learning, it is a key issue to learn and represent similarity. This paper focuses on the problem of learning similarity with a multikernel method. Motivated by geometric intuition and computability, similarity between patterns is proposed to be measured by their included angle in a kernel-induced Hilbert space. Having noticed that the cosine of such an included angle can be represented by a normalized kernel, it can be said that the task of learning similarity is equivalent to learning an appropriate normalized kernel. In addition, an error bound is also established for learning similarity with the multikernel method. Based on this bound, a boosting-style algorithm is developed. The preliminary experiments validate the effectiveness of the algorithm for learning similarity.
PubMed ID: 20519158
文献类型: Article
作者关键词: Boosting; learning similarity; multikernel
KeyWords Plus: NONLINEAR DIMENSIONALITY REDUCTION; MODEL; CLASSIFICATION; CLASSIFIERS; REGRESSION; SELECTION; MATRIX
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Computer Science, Cybernetics
研究方向: Automation & Control Systems; Computer Science
IDS 号: 708TX
ISSN: 1083-4419
________________________________________
第 188 条,共 209 条
标题: Partially polarized wave-breaking-free dissipative soliton with super-broad spectrum in a mode-locked fiber laser
作者: Mao, D (Mao, D.); Liu, XM (Liu, X. M.); Wang, LR (Wang, L. R.); Hu, XH (Hu, X. H.); Lu, H (Lu, H.)
来源出版物: LASER PHYSICS LETTERS  卷: 8  期: 2  页: 134-138  DOI: 10.1002/lapl.201010105  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 63
被引频次合计: 64
摘要: We have reported a novel type of partially polarized dissipative soliton in a mode-locked erbium-doped all-fiber laser with strong net normal dispersion. The output pulses exhibit as quasi-trapezoid spectral profiles with 3-dB width as large as 83 nm. The maximum pulse energy and peak power approach 75 nJ and 6 kW at the available pump power of 1 W, respectively. Experimental observations show that the polarization state of the broadband dissipative soliton changes along the cavity position from totally to partially polarized, which is distinct from the typical dissipative soliton that is completely polarized throughout the cavity. It is found that the polarization state of mode-locked dissipative solitons strongly depends on the peak power of pulses, and the partially polarized state results from nonlinear phase shift accumulated in laser cavity.
文献类型: Article
作者关键词: fiber ring laser; high-energy partially polarized pulse; mode locking
KeyWords Plus: OPTICAL LOOP MIRROR; NORMAL-DISPERSION; DOPED FIBER; PULSE GENERATION; RING LASERS; CAVITY; LOCKING; AMPLIFIER
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 718YK
ISSN: 1612-2011
________________________________________
第 189 条,共 209 条
标题: Optimized synthesis of fiber Bragg gratings with triangular spectrum for wavelength-interrogation application
作者: Gong, YK (Gong, Yongkang); Liu, XM (Liu, Xueming); Wang, LR (Wang, Leiran)
来源出版物: OPTICAL ENGINEERING  卷: 50  期: 2  文献号: 024401  DOI: 10.1117/1.3533030  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: A novel method for synthesizing arbitrary-shape triangular-spectrum fiber Bragg gratings (TS-FBGs) is proposed. It involves the use of a discrete layer peeling method for exploiting initial guess and a simulated annealing method for optimizing the desired grating parameter. By comparing it to the reported TS-FBGs synthesis methods, the proposed method has advantages of reducing the maximum index modulation and smoothing index modulation profile simultaneously. We employ the proposed method to synthesize FBGs with symmetric, asymmetric, and right-angled triangular spectrum, all of which have the low and smooth index modulation profiles. The synthesized gratings can act simple and cost-effective wavelength-interrogation devices in optical sensor systems. (c) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3533030]
文献类型: Article
作者关键词: fiber Bragg grating; synthesis method; optimization; sensing
KeyWords Plus: PHOTONIC CRYSTAL FIBER; ERBIUM-DOPED FIBER; DESIGN; SENSOR; DISPERSION; FILTER; FABRICATION; SYSTEM
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 728HG
ISSN: 0091-3286
电子 ISSN: 1560-2303
________________________________________
第 190 条,共 209 条
标题: Refluxing of fast electrons in solid targets irradiated by intense, picosecond laser pulses
作者: Quinn, MN (Quinn, M. N.); Yuan, XH (Yuan, X. H.); Lin, XX (Lin, X. X.); Carroll, DC (Carroll, D. C.); Tresca, O (Tresca, O.); Gray, RJ (Gray, R. J.); Coury, M (Coury, M.); Li, C (Li, C.); Li, YT (Li, Y. T.); Brenner, CM (Brenner, C. M.); Robinson, APL (Robinson, A. P. L.); Neely, D (Neely, D.); Zielbauer, B (Zielbauer, B.); Aurand, B (Aurand, B.); Fils, J (Fils, J.); Kuehl, T (Kuehl, T.); McKenna, P (McKenna, P.)
来源出版物: PLASMA PHYSICS AND CONTROLLED FUSION  卷: 53  期: 2  文献号: 025007  DOI: 10.1088/0741-3335/53/2/025007  出版年: FEB 2011 
Web of Science 核心合集中的 "被引频次": 16
被引频次合计: 16
摘要: The propagation of fast electrons produced in the interaction of relativistically intense, picosecond laser pulses with solid targets is experimentally investigated using K-alpha emission as a diagnostic. The role of fast electron refluxing within the target, which occurs when the electrons are reflected by the sheath potentials formed at the front and rear surfaces, is elucidated. The targets consist of a Cu fluorescence layer of fixed thickness at the front surface backed with a propagation layer of CH, the thickness of which is varied to control the number of times the refluxing fast electron population transits the Cu fluorescence layer. Enhancements in the K-alpha yield and source size are measured as the thickness of the CH layer is decreased. Comparison with analytical and numerical modelling confirms that significant refluxing occurs and highlights the importance of considering this phenomenon when deriving information on fast electron transport from laser-solid interaction experiments involving relatively thin targets.
文献类型: Article
KeyWords Plus: PROTON ACCELERATION; TRANSPORT; DRIVEN
Web of Science 类别: Physics, Fluids & Plasmas; Physics, Nuclear
研究方向: Physics
IDS 号: 710KD
ISSN: 0741-3335
________________________________________
第 191 条,共 209 条
标题: Parallel two-step phase-shifting point-diffraction interferometry for microscopy based on a pair of cube beamsplitters
作者: Gao, P (Gao, Peng); Yao, BL (Yao, Baoli); Min, JW (Min, Junwei); Guo, RL (Guo, Rongli); Zheng, JJ (Zheng, Juanjuan); Ye, T (Ye, Tong); Harder, I (Harder, Irina); Nercissian, V (Nercissian, Vanusch); Mantel, K (Mantel, Klaus)
来源出版物: OPTICS EXPRESS  卷: 19  期: 3  页: 1930-1935  DOI: 10.1364/OE.19.001930  出版年: JAN 31 2011 
Web of Science 核心合集中的 "被引频次": 16
被引频次合计: 17
摘要: Parallel two-step phase-shifting point-diffraction interferometry for microscopy based on a pair of cube beamsplitters is proposed. The first 45 degrees-tilted cube beamsplitter splits object wave into two parallel copies: one copy is filtered by a pinhole in its Fourier plane to behave as reference wave, while the other one remains unchanged as object wave. The second cube beamsplitter combines the object and reference waves, and then split them together into two beams. Along with the two beams, two parallel phase-shifting interferograms are obtained in aid of polarization elements. Based on the proposed configuration, slightly-off-axis interferometry for microscopy is performed, which suppresses dc term by subtracting the two phase-shifting holograms from each other. The setup is highly stable due to its common-path configuration, and has been demonstrated to be suitable for measuring moving objects or dynamic processes. (C) 2011 Optical Society of America
PubMed ID: 21369008
文献类型: Article
KeyWords Plus: DIGITAL HOLOGRAPHY; DYNAMICS; CELLS
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 714JY
ISSN: 1094-4087
________________________________________
第 192 条,共 209 条
标题: Shifting the spherical focus of a 4Pi focusing system
作者: Yan, SH (Yan, Shaohui); Yao, BL (Yao, Baoli); Rupp, R (Rupp, Romano)
来源出版物: OPTICS EXPRESS  卷: 19  期: 2  页: 673-678  DOI: 10.1364/OE.19.000673  出版年: JAN 17 2011 
Web of Science 核心合集中的 "被引频次": 6
被引频次合计: 8
摘要: In a 4Pi focusing system radially polarized laser beams can be focused to a spherical focal spot. For many applications, e. g., for moving trapped particles or for scanning a specimen, one would like to change the position of focal spot along the optical axis without moving lenses or laser beams. We demonstrate how this can be achieved by modulating the phase of the input field at the pupil plane of the lens. The required phase modulation function is determined by spherical wave expansion of the plane wave factors in the Richards-Wolf integral. (C)2011 Optical Society of America
PubMed ID: 21263606
文献类型: Article
KeyWords Plus: RADIAL POLARIZATION; OPTICAL TWEEZERS; FIELD; FORCES; NEEDLE; LIGHT; BEAMS; SPOT
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 707US
ISSN: 1094-4087
________________________________________
第 193 条,共 209 条
标题: Enhanced Efficiency of Multiple Four-Wave Mixing Induced by Modulation Instability in Low-Birefringence Fibers
作者: Liu, XM (Liu, X. M.)
来源出版物: JOURNAL OF LIGHTWAVE TECHNOLOGY  卷: 29  期: 2  页: 179-185  DOI: 10.1109/JLT.2010.2097241  出版年: JAN 15 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: Modulation instability (MI) induced by two strong beams and a weak beam via cross phase modulation is investigated. Multiple four-wave-mixing (FWM) processes associated with the MI in low-birefringence fibers are studied both theoretically and experimentally. The coupled-mode equations describing the MI-induced FWM nonlinear interactions between pump waves and sideband waves are derived. Theoretical and experimental results show that, on the assistance of MI, new optical frequencies can be generated quite efficiently from multiple FWM processes. More than eleven sidebands are experimentally achieved by the MI-driven multiple FWM processes. The transfer of energy from pumps to sidebands can be dramatically enhanced by the MI-induced parametric process. The experimental observations by using a piece of highly nonlinear dispersion-flattened photonic-crystal fiber confirm our theoretical predictions.
文献类型: Article
作者关键词: Fiber; four-wave-mixing; modulation instability; parametric process
KeyWords Plus: ERBIUM-DOPED FIBER; PHOTONIC CRYSTAL FIBER; CROSS-PHASE MODULATION; OPTICAL-FIBERS; BRAGG GRATINGS; DISPERSION; LASERS; AMPLIFICATION; FREQUENCY; SYSTEMS
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Telecommunications
研究方向: Engineering; Optics; Telecommunications
IDS 号: 705EB
ISSN: 0733-8724
________________________________________
第 194 条,共 209 条
标题: Microplasma Technology and Its Applications in Analytical Chemistry
作者: Yuan, X (Yuan, Xin); Tang, J (Tang, Jie); Duan, YX (Duan, Yixiang)
来源出版物: APPLIED SPECTROSCOPY REVIEWS  卷: 46  期: 7  页: 581-605  DOI: 10.1080/05704928.2011.604814  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 11
被引频次合计: 11
摘要: This review article describes some existing microplasma sources and their applications in analytical chemistry. These microplasmas mainly include direct current glow discharge (DC), microhollow-cathode discharge (MHCD) or microstructure electrode (MSE), dielectric barrier discharge (DBD), capacitively coupled microplasmas (CC mu Ps), miniature inductively coupled plasmas (mICPs), and microwave-induced plasmas (MIPs). The historical development and recent advances in these microplasma techniques are presented. Fundamental properties of the microplasmas, the unique features of the reduced size and volume, as well as the advantageous device structures for chemical analysis are discussed in detail, with the emphasis toward detection of gaseous samples. The analytical figures of merit obtained using these microplasmas as molecular/elemental-selective detectors for emission spectrometry and as ionization sources for mass spectrometry are also given in this review article.
文献类型: Review
作者关键词: Microplasma; gas discharge; plasma detector; emission spectrometry; gas chromatography
KeyWords Plus: CAPILLARY GAS-CHROMATOGRAPHY; INDUCTIVELY-COUPLED PLASMA; DIELECTRIC BARRIER DISCHARGE; MICROHOLLOW CATHODE-DISCHARGE; RADIO-FREQUENCY PLASMA; OPTICAL-EMISSION SPECTROMETRY; ION MOBILITY SPECTROMETRY; CHEMICAL-ANALYSIS SYSTEMS; MICROWAVE-INDUCED PLASMA; ON-A-CHIP
Web of Science 类别: Instruments & Instrumentation; Spectroscopy
研究方向: Instruments & Instrumentation; Spectroscopy
IDS 号: 827BV
ISSN: 0570-4928
________________________________________
第 195 条,共 209 条
标题: TUNABLE AND ROBUST REFLECTION-FREE WAVEGUIDES BASED ON A GYROMAGNETIC PHOTONIC CRYSTAL
作者: Lu, H (Lu, H.); Liu, XM (Liu, X. M.); Zhou, R (Zhou, R.); Mao, D (Mao, D.); Gong, Y (Gong, Y.)
来源出版物: JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS  卷: 25  期: 11-12  页: 1752-1761  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: We propose and numerically investigate a kind of tunable and robust reflection-free waveguides based on a gyromagnetic photonic crystal (PC). The time reversal symmetry breaking of the gyromagnetic PC under out-of-plane dc magnetic fields gives rise to one-way edge modes in both the second and third band gaps. It is found that the propagating properties of one-way modes in the waveguides can be easily controlled by adjusting the directions of external magnetic fields. Moreover, the one-way modes are robust against the disorder in the waveguides.
文献类型: Article
KeyWords Plus: DISORDER
Web of Science 类别: Engineering, Electrical & Electronic; Physics, Applied
研究方向: Engineering; Physics
IDS 号: 821KY
ISSN: 0920-5071
________________________________________
第 196 条,共 209 条
标题: Analytical vectorial structure of non-paraxial four-petal Gaussian beams in the far field
作者: Long, XW (Long, Xuewen); Lu, KQ (Lu, Keqing); Zhang, YH (Zhang, Yuhong); Guo, JB (Guo, Jianbang); Li, KH (Li, Kehao)
来源出版物: OPTIK  卷: 122  期: 16  页: 1448-1452  DOI: 10.1016/j.ijleo.2010.09.028  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: The analytical vectorial structure of non-paraxial four-petal Gaussian beams (FPGBs) in the far field has been studied based on vector angular spectrum method and stationary phase method. In terms of analytical electromagnetic representations of the TE and TM terms, the energy flux distributions of the TE term, the TM term, and the whole beam are derived in the far field, respectively. According to our investigation, the FPGBs can evolve into a number of small petals in the far field. The number of the petals is determined by the order of input beam. The physical pictures of the FPGBs are well illustrated from the vectorial structure, which is beneficial to strengthen the understanding of vectorial properties of the FPGBs. (C) 2010 Elsevier GmbH. All rights reserved.
文献类型: Article
作者关键词: Four-petal Gaussian beam; Vectorial structure; Far field
KeyWords Plus: PROPAGATION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 810TO
ISSN: 0030-4026
________________________________________
第 197 条,共 209 条
标题: Non-goal scene analysis for soccer video
作者: Gao, XB (Gao, Xinbo); Niu, ZX (Niu, Zhenxing); Tao, DC (Tao, Dacheng); Li, XL (Li, Xuelong)
来源出版物: NEUROCOMPUTING  卷: 74  期: 4  页: 540-548  DOI: 10.1016/j.neucom.2010.09.013  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 6
被引频次合计: 6
摘要: The broadcast soccer video is usually recorded by one main camera, which is constantly gazing somewhere of playfield where a highlight event is happening. So the camera parameters and their variety have close relationship with semantic information of soccer video, and much interest has been caught in camera calibration for soccer video. The previous calibration methods either deal with goal scene, or have strict calibration conditions and high complexity. So, it does not properly handle the non-goal scene such as midfield or center-forward scene. In this paper, based on a new soccer field model, a field symbol extraction algorithm is proposed to extract the calibration information. Then a two-stage calibration approach is developed which can calibrate camera not only for goal scene but also for non-goal scene. The preliminary experimental results demonstrate its robustness and accuracy. (c) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Semantic analysis; Field model; Scene analysis; Camera calibration
KeyWords Plus: CAMERA CALIBRATION; SPORTS VIDEO; TRACKING; BALL
Web of Science 类别: Computer Science, Artificial Intelligence
研究方向: Computer Science
IDS 号: 712WU
ISSN: 0925-2312
________________________________________
第 198 条,共 209 条
标题: Polymer-metal complex as gel electrolyte for quasi-solid-state dye-sensitized solar cells
作者: Xiang, WC (Xiang, Wanchun); Fang, YY (Fang, Yanyan); Lin, YA (Lin, Yuan); Fang, SB (Fang, Shibi)
来源出版物: ELECTROCHIMICA ACTA  卷: 56  期: 3  页: 1605-1610  DOI: 10.1016/j.electacta.2010.10.061  出版年: JAN 1 2011 
Web of Science 核心合集中的 "被引频次": 8
被引频次合计: 8
摘要: A kind of polymer-metal complex gel electrolyte is successfully prepared and is used in dye-sensitized solar cells. Raman and X-ray photoelectron spectroscopy confirm the structure of this complex and is found that the metal ion reacts with nitrogen in the polymer. This novel electrolyte shows apparent diffusion coefficient of iodide of 8.37 x 10(-7) cm(2) s(-1) and the energy conversion efficiency of 6.10% when the amount of Znl(2) is 0.04 M. By studying the dissociation active energy of the inorganic salt in electrolytes, we find that the metal salts can dissociate more easily after reacting with polymer and as a result can provide extra free iodide ion. The cell maintains ca. 93% of its initial efficiency after 20 d without further sealing, which shows good long-time stability. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
文献类型: Article
作者关键词: Polymer-metal complex; Quasi-solid state electrolyte; Dye-sensitized solar cell
Web of Science 类别: Electrochemistry
研究方向: Electrochemistry
IDS 号: 746EL
ISSN: 0013-4686
电子 ISSN: 1873-3859
________________________________________
第 199 条,共 209 条
标题: Polarization detection with polarization interference imaging spectrometer
作者: Jian, XH (Jian, Xiaohua); Zhang, CM (Zhang, Chunmin); Zhao, BC (Zhao, Baochang)
来源出版物: OPTIK  卷: 122  期: 8  页: 677-680  DOI: 10.1016/j.ijleo.2010.05.004  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: A new method of measuring the intensity and state of polarization of optical radiation by means of the high resolution polarization interference imaging spectrometer (PIIS) is introduced and theoretically investigated in this paper. The error accuracy analysis is proposed, and it is proved that the system is very stable and precise in theory. In this new way, the polarized characteristics of light could be taken good use to analyze and distinguish objects in passive remote sensing with the PI IS, which means that the polarization interference imaging spectrometer now can be used not only as cameras and interferometers but also as polaristrobometers. (C) 2010 Published by Elsevier GmbH.
文献类型: Article
作者关键词: Polarization detection; Polarization interference imaging; spectrometer; Stokes vectors
KeyWords Plus: INTERFEROGRAM; ORIENTATION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 750IY
ISSN: 0030-4026
________________________________________
第 200 条,共 209 条
标题: A TECHNOLOGY TO GENERATE ARBITRARY ELECTRICAL WAVEFORM FOR SHAPING HIGH POWER LASER
作者: Liu, H (Liu, H.); Liu, BY (Liu, B. -Y.); Bai, YL (Bai, Y. -L.); Gou, YS (Gou, Y. -S.); Zheng, JK (Zheng, J. -K.)
来源出版物: JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS  卷: 25  期: 4  页: 495-506  DOI: 10.1163/156939311794500287  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to improve the output power of laser pulse in the inertia confinement fusion experiment, an arbitrary waveform generator is fabricated to shape the laser pulse. The arbitrary waveform generator is based on the micro-strip line transmission delay technology and GaAs Field Effect Transistor set which has a good ability of generating voltage-controlled current. To satisfy high amplitude requirement on electrical pulse for optical waveguide modulator, an ultra-broad bandwidth voltage tunable amplifier is applied to the output signals, and the pulse amplitude is adjustable. The designed generator generates a pulse waveform with amplitude between 0 and 5 V, duration less than 10 ns, 330 ps time-domain adjustment and a square pulse with rising edge 471 ps, falling edge 428 ps. The experiment results show the shaped laser pulse is obtained based on the shaping electrical pulse.
文献类型: Article
KeyWords Plus: APERTURE-COUPLED-STRIPLINE; DIVIDER; LINES
Web of Science 类别: Engineering, Electrical & Electronic; Physics, Applied
研究方向: Engineering; Physics
IDS 号: 729TV
ISSN: 0920-5071


第 201 条,共 209 条
标题: Morphology of NaNdF4 nanocrystals from Nd(C3H7COO)(3)center dot Phen and Nd(NO3)(3)center dot Phen (Phen, 1,10-phenanthroline) as neodymium precursors
作者: Cui, K (Cui Kai); Gao, C (Gao Chao); Cui, XX (Cui Xiaoxia); She, JB (She Jiangbo); Peng, B (Peng Bo); Wei, W (Wei Wei)
来源出版物: JOURNAL OF RARE EARTHS  卷: 29  期: 1  页: 20-23  DOI: 10.1016/S1002-0721(10)60399-7  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A series of NaNdF4 nanocrystals was synthesized via a facile hydrothermal route with Nd(C3H7COO)(3)center dot Phen and Nd(NO3)(3)center dot Phen (Phen, 1,10-phenanthroline) as the Nd precursors. Distinct effect of the neutral donor ligand (Phen) on the morphology of NaNdF4 nanocrystals was demonstrated. When Nd(C3H7COO)(3)center dot Phen was chosen and the hydrothermal reaction temperature was controlled at 220 degrees C, the NaNdF4 nanocrystals with uniform short nanorod shape were obtained. The sizes of the as-prepared nanorods could be tuned by changing the hydrothermal temperatures. This method provided a useful way for the preparation of sodium rare-earth fluoride nanocrystals with controlled shapes and sizes.
文献类型: Article
作者关键词: NaNdF4; nanorods; 1,10-phenanthroline; hydrothermal process; rare earths
KeyWords Plus: UP-CONVERSION EMISSION; OPTICAL-PROPERTIES; CDSE NANOCRYSTALS; LAF3; MICROSTRUCTURES; NANOPARTICLES; MONODISPERSE; GROWTH
Web of Science 类别: Chemistry, Applied
研究方向: Chemistry
IDS 号: 717CZ
ISSN: 1002-0721
________________________________________
第 202 条,共 209 条
标题: Over 300 nm tunable broadband one-crystal noncollinear optical parametric amplification
作者: Long, HB (Long, H. B.); Li, XF (Li, X. F.); Liu, HJ (Liu, H. J.)
来源出版物: LASER PHYSICS  卷: 21  期: 1  页: 86-89  DOI: 10.1134/S1054660X11010130  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: An over 300 nm tunable broadband noncollinear optical parametric amplification in visible scale as well as the generation of blue pump pulses in one BBO crystal are demonstrated. Micro-joule energies are achieved in the signal branch, and the signal central wavelength can be tuned from 475 to 800 nm. The near-transform-limited sub-50 fs pulse duration is attainable over the whole tuning range after compression by a pair of prisms.
文献类型: Article
KeyWords Plus: FEMTOSECOND PULSES; AMPLIFIER; GENERATION
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 722TF
ISSN: 1054-660X
________________________________________
第 203 条,共 209 条
标题: Measuring the Topological Charge of Integer and Fraction Vortices Using Multipoint Plates
作者: Li, YY (Li, Yang-yue); Liu, H (Liu, Hui); Chen, ZY (Chen, Zi-yang); Pu, JX (Pu, Ji-xiong); Yao, BL (Yao, Bao-li)
来源出版物: OPTICAL REVIEW  卷: 18  期: 1  页: 7-12  DOI: 10.1007/s10043-011-0033-z  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: The topological charge of integral vortex beams with a single circle of multipoints has previously been measured. In this work, we theoretically and experimental study the diffraction patterns of vortex beams of integral and fractional topological charges using a single circle and two circles of multipoint plates. It is found that the diffraction patterns are dependent not only on the multipoint plates, but also on the topological charge of the vortex beams. On the basis of this property, we can measure the topological charges of integral and fractional vortex beams. (C) 2011 The Japan Society of Applied Physics
文献类型: Article
作者关键词: vortex beams; multipoint plates; interference
KeyWords Plus: ORBITAL ANGULAR-MOMENTUM; OPTICAL VORTICES; BEAMS; LIGHT
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 719ZA
ISSN: 1340-6000
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第 204 条,共 209 条
标题: Binding sites and forces of anti-collagen I antibody on collagen fiber observed using atomic force microscopy
作者: Zhu, J (Zhu, Jie); Guo, LH (Guo, Lianhong); Sabharwal, T (Sabharwal, Tanya); Kalyanasundaram, A (Kalyanasundaram, Aruna); Ouyang, WQ (Ouyang, Wuqing); Zhang, WK (Zhang, Wenke); Yao, BL (Yao, Baoli); Orgel, JP (Orgel, Joseph Pro.)
来源出版物: CARDIOLOGY  卷: 120  页: 44-45  增刊: 1  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
文献类型: Meeting Abstract
Web of Science 类别: Cardiac & Cardiovascular Systems
研究方向: Cardiovascular System & Cardiology
IDS 号: 865IR
ISSN: 0008-6312
________________________________________
第 205 条,共 209 条
标题: Multi-Sensor Centralized Fusion without Measurement Noise Covariance by Variational Bayesian Approximation
作者: Gao, XB (Gao, Xinbo); Chen, JG (Chen, Jinguang); Tao, DC (Tao, Dacheng); Li, XL (Li, Xuelong)
来源出版物: IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS  卷: 47  期: 1  页: 718-727  DOI: 10.1109/TAES.2011.5705702  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 7
摘要: The work presented here solves the multi-sensor centralized fusion problem in the linear Gaussian model without the measurement noise variance. We generalize the variational Bayesian approximation based adaptive Kalman filter (VB_AKF) from the single sensor filtering to a multi-sensor fusion system, and propose two new centralized fusion algorithms, i.e., VB_AKF-based augmented centralized fusion algorithm and VB_AKF-based sequential centralized fusion algorithm, to deal with the case that the measurement noise variance is unknown. The simulation results show the effectiveness of the proposed algorithms.
文献类型: Article
KeyWords Plus: TRACK ASSOCIATION; PARTICLE FILTERS; MONTE-CARLO; STATE; PARAMETERS; ESTIMATORS; TUTORIAL
Web of Science 类别: Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications
研究方向: Engineering; Telecommunications
IDS 号: 715YO
ISSN: 0018-9251
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第 206 条,共 209 条
标题: Preparation and properties of novel GeS2-Ga(In)(2)S-3-CuI chalcohalide glasses
作者: Zheng, X (Zheng, X.); Chen, F (Chen, F.); Tao, H (Tao, H.); Guo, H (Guo, H.); Lin, C (Lin, C.); Gu, S (Gu, S.); Zhao, X (Zhao, X.)
来源出版物: JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS  卷: 13  期: 1-2  页: 24-31  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Novel GeS2-Ga(In)(2)S-3-CuI chalcohalide glasses were prepared successfully. These glasses have relatively high glass transition temperatures up to 452 degrees C but narrow glass-forming region, and a wide range of transmission approximately from 0.50 to 12.5 mu m. The structural evolvement of the glasses was studied by Raman spectroscopy. Finally, third-order optical nonlinearities were investigated utilizing Z-scan technique at the wavelength of 800nm. Both nonlinear refractive index n(2) and nonlinear absorption coefficient beta show an increasing tendency with increasing CuI content or substituting In for Ga, and structural dependency of n(2) has also been discussed. A minimum figure of merit FOM = 2.237 was obtained.
文献类型: Article
作者关键词: Chalcohalide glasses; Raman spectroscopy; Z-scan; Nonlinear optics
KeyWords Plus: NONLINEAR-OPTICAL PROPERTIES; CHALCOGENIDE GLASSES; PHYSICAL-PROPERTIES; RAMAN-SCATTERING; SYSTEM; GES2-GA2S3-AGCL; GENERATION; 3RD-ORDER
Web of Science 类别: Materials Science, Multidisciplinary; Optics; Physics, Applied
研究方向: Materials Science; Optics; Physics
IDS 号: 738FD
ISSN: 1454-4164
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第 207 条,共 209 条
标题: High energy and high efficiency 3.4 mu m extracavity KTA optical parametric oscillator
作者: Sun, QB (Sun, Q. B.); Liu, HJ (Liu, H. J.); Huang, N (Huang, N.); Ruan, C (Ruan, C.); Zhu, SL (Zhu, S. L.); Zhao, W (Zhao, W.)
来源出版物: LASER PHYSICS LETTERS  卷: 8  期: 1  页: 16-20  DOI: 10.1002/lapl.201010083  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 19
被引频次合计: 19
摘要: A high energy and high efficiency extracavity KTiOAsO(4) (KTA) optical parametric oscillator (OPO) with excellent stability and beam quality, which is pumped by a Q-switched single-longitudinal-mode Nd:YAG laser, has been demonstrated based on a type II non-critical phase matching (NCPM) KTA crystal. The maximum pulse energy of 10 mJ at 3.467 mu m is obtained with the repetition rate of 10 Hz and pulse width of 2 ns, corresponding to an optical-optical conversion efficiency of 14% from 1.064 mu m to 3.467 mu m. After one hour of investigation, the OPO output stability better than 4.5% rms has been obtained.
[GRAPHICS]
The output stability of 3.467 mu m (C) 2011 by Astro Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA
文献类型: Article
作者关键词: KTA OPO; mid-infrared; high energy; high efficiency
KeyWords Plus: SWITCHED NDYAG LASER; LONGITUDINAL-MODE OPERATION; POLED LITHIUM-NIOBATE; HIGH-POWER; TM,HOGDVO4 LASER; CONTINUOUS-WAVE; OPO DRIVEN; CRYSTAL; CAVITY
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: 709LO
ISSN: 1612-2011
________________________________________
第 208 条,共 209 条
标题: An adaptive VQ method used on interferential multi-spectral image lossless compression
作者: Wen, J (Wen, Jia); Ma, CW (Ma, Caiwen); Shui, PL (Shui, Penglang)
来源出版物: OPTICS COMMUNICATIONS  卷: 284  期: 1  页: 64-73  DOI: 10.1016/j.optcom.2010.08.030  出版年: JAN 1 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: In this paper, a high efficient adaptive LBG VQ (vector quantization) method is proposed, which is an improved version of the expansion LBG VQ method [1] (proposed in 2009)and exploits the shortest distance from a point to line segment. Moreover, the proposed method is used on the lossless compression of LASIS (Large Aperture Static Imaging Spectrometer) interferential multi-spectral images. Compared with the expansion LBG VQ method proposed in 2009. the experimental results showed that the adaptive LBG VQ method improved the compression performance obviously. And the experiment also showed that when using these LBG VQ methods above without Dual-Direction Prediction [2], the entropy generated by expansion LBG VQ method [1] sometimes will be larger than that generated by traditional LBG VQ method [3], and when using these LBG VQ methods above after Dual-Direction Prediction [2], CR (compression ratio) generated by expansion LBG VQ method [1] sometimes will be less than that generated by traditional LBG VQ method [3], while the entropy generated by the method proposed in this paper will be much less than that generated by either traditional LBG VQ method [3] or the expansion LBG VQ method [1] and CR generated by the method proposed in this paper will be much larger than that generated by either traditional LBG VQ method [3] or the expansion LBG VQ method [1]. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article
作者关键词: Interferential multi-spectral image; LASIS; Lossless compression; LBG VQ
KeyWords Plus: QUANTIZATION
Web of Science 类别: Optics
研究方向: Optics
IDS 号: 702KM
ISSN: 0030-4018
________________________________________
第 209 条,共 209 条
标题: General Expression of Optic Path Difference of Reflecting Rotating Fourier Transform Spectrometer
作者: Zhou, JS (Zhou Jin-song); Xiangli, B (Xiangli Bin); Wei, RY (Wei Ru-yi); Jing, JJ (Jing Juan-juan)
来源出版物: SPECTROSCOPY AND SPECTRAL ANALYSIS  卷: 31  期: 1  页: 263-266  DOI: 10.3964/j.issn.1000-0593(2011)01-0263-04  出版年: JAN 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 3
摘要: The principle of reflecting rotating Fourier transform spectrometer was introduced in the present paper. Based on the Malus law and reflecting characteristic of cube corner, the optic path difference of reflecting rotating Fourier transform spectrometer was analyzed and calculated by choosing the center of rotating mirror as a reference point of the aplanatic surface of incidence beam and return beam. General expression of optic path difference at any time and maximal optic path difference of reflecting rotating Fourier transform spectrometer was presented. The factors that influence the maximal optic path difference and the period of optic path difference were analyzed. The results provide a theoretical guidance for design and manufacture of reflecting rotating Fourier transform spectrometer.
文献类型: Article
作者关键词: Spectrometer; Fourier transform; Rotating mirror; Optic path difference
Web of Science 类别: Spectroscopy
研究方向: Spectroscopy
IDS 号: 707MO
ISSN: 1000-0593

 

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