机构

• 长春光学精密机械与物... [5]
• 地质与地球物理研究所 [2]
• 海洋研究所 [2]
• 地理科学与资源研究所 [1]
• 理论物理研究所 [1]

采集方式

• OAI收割 [11]

内容类型

• 期刊论文 [5]
• 会议论文 [4]
• CNKI期刊论文 [1]
• SCI/SSCI论文 [1]

发表日期

• 2018 [1]
• 2015 [3]
• 2012 [3]
• 2007 [1]
• 2006 [1]
• 2005 [1]
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学科主题

• Physics [1]

筛选

浏览/检索结果: 共11条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Chromatic analysis of harmonic Fresnel lenses by FDTD and angular spectrum methods 期刊论文  OAI收割 Applied Optics, 2018, 卷号: 57, 期号: 19, 页码: 5281-5287 作者:  Yang, Jianming;  Twardowski, Patrice;  Gerard, Philippe;  Yu, Wenhui;  Fontaine, Joel   |  收藏  |  浏览/下载：24/0  |  提交时间：2019/09/17 Time domain analysis  Angle measurement  Diffraction efficiency  Efficiency  Finite difference time domain method  Full width at half maximum  Harmonic analysis  Optical instrument lenses  Refractive index  Spectrum analysis   Effect of wave spectrum width on the probability density distribution of wind-wave heights CNKI期刊论文  OAI收割 2015 作者:  Liu YH(刘亚豪);  Hou YY(侯一筠);  Hu P(胡珀);  Liu Z(刘泽)   |  收藏  |  浏览/下载：1/0  |  提交时间：2024/12/18 wave-spectrum width  probability distribution of wave heights  significant wave height   Effect of wave spectrum width on the probability density distribution of wind-wave heights 期刊论文  OAI收割 CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY, 2015, 卷号: 33, 期号: 5, 页码: 1124-1131 作者:  Liu Yahao;  Hou Yijun;  Hu Po;  Liu Ze 收藏  |  浏览/下载：81/0  |  提交时间：2015/12/07 wave-spectrum width  probability distribution of wave heights  significant wave height   Tree ring density-based warm-season temperature reconstruction since AD 1610 in the eastern Tibetan Plateau SCI/SSCI论文  OAI收割 2015 作者:  Yin H.;  Liu, H. B.;  Linderholm, H. W.;  Sun, Y. 收藏  |  浏览/下载：30/0  |  提交时间：2015/12/09 Tibetan Plateau  Purple cone spruce  Maximum latewood density  Temperature reconstruction  central hengduan mountains  summer temperature  precipitation variation  hilbert spectrum  maximum density  variability  chronologies  growth  china  width   Frequency-related factors analysis in frequency domain waveform inversion 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2012, 卷号: 55, 期号: 4, 页码: 1345-1353 作者:  Liu Guo-Feng;  Liu Hong;  Meng Xiao-Hong;  Yan Hao-Fei   |  收藏  |  浏览/下载：19/0  |  提交时间：2018/09/26 Frequency Domain Waveform Inversion  Multi-scale  Spectrum Width  Wavelet   Frequency-related factors analysis in frequency domain waveform inversion 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2012, 卷号: 55, 期号: 4, 页码: 1345-1353 作者:  Liu Guo-Feng;  Liu Hong;  Meng Xiao-Hong;  Yan Hao-Fei   |  收藏  |  浏览/下载：14/0  |  提交时间：2018/09/26 Frequency Domain Waveform Inversion  Multi-scale  Spectrum Width  Wavelet   Improved method of target detection on optoelectronic hybrid joint transform correlator in cluttered scences (EI CONFERENCE) 会议论文  OAI收割 2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China 作者:  Yang L.;  Yang L. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 A classical joint transform correlator (JTC) usually yields large correlation sidelobes as well as a large correlation peak width  strong zero-order peak  and low diffraction efficiency  which make the detection ability of JTC lower. To overcome these difficulties  firstly  a joint power spectrum (JPS) subtraction technique in Fourier plane was proposed  where reference image power spectrum and object image power spectrum are subtracted from the JPS before inverse Fourier-transform operation  it is obvious that the modified JPS removes the zero-order term. Secondly  a fringe-adjusted filter (FAF) was presented to suppress sidelobes and noises. The modified JPS is multiplied by a FAF before the inverse Fourier-transform operation to obtain the cross-correlation peak. Computer simulations demonstrated the improved method can obviously remove zero-order diffraction and effectively suppress the sidelobes and noises compared with classic JTC  and then improve the detection ability for JTC. Experimental results presented the sharp correlation peak and also confirmed the method effectiveness. (2012) Trans Tech Publications  Switzerland.   Q-switched Er/Yb co-doped cladding pumped fiber laser (EI CONFERENCE) 会议论文  OAI收割 Passive Components and Fiber-based Devices IV, November 2, 2007 - November 5, 2007, Wuhan, China 作者:  Liu Y.;  Liu Y.;  Liu Y.;  Wang J. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 A compact all fiber Q-switched fiber laser based on an Er/Yb co-doped fiber (EYDF) is demonstrated. Two Bragg gratings (FBGl and FBG2) were employed as the cavity mirrors. The Average output power  single pulse energy and pulse width of the fiber laser at different pumping powers and different repetition rates was studied. The output spectrum of the fiber laser is 0.5 nm. At maximum launched pump power of 558mW  pulse energy of about 50J and duration of 140ns was obtained at the repetition of 2 kHz.   Effect of interface on luminescence properties in ZnO/MgZnO heterostructures (EI CONFERENCE) 会议论文  OAI收割 Wei Z. P.; Lu Y. M.; Shen D. Z.; Wu C. X.; Zhang Z. Z.; Zhao D. X.; Zhang J. Y.; Fan X. W. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 A set of ZnO/MgZnO heterostructures with well widths  Lw  varying from 2 to 20 nm has been grown by plasma-assisted molecular-beam epitaxy (P-MBE). We present a room-temperature (RT) study of the well-width-dependent photoluminescence (PL) spectra and carrier lifetimes in ZnO/MgZnO heterostructures. Bi-exponential process is seen at RT time-decay curves of the luminescence from the well layers. The fast process is from the recombination of the free exciton  while the slow process is attributing to the recombination of the localized exciton in the interface of ZnO and MgZnO. It is also confirmed from the PL peak shift of time-resolved PL spectra. With decreasing the well thickness  the fast process gradually increases and dominantly contributes to the PL spectrum due to the interface improvement. 2006 Elsevier B.V. All rights reserved.   Holographic polymer Bragg gratings for dense wavelength division multiplexing at 1550nm (EI CONFERENCE) 会议论文  OAI收割 Holography, Diffractive Optics, and Applications II, November 8, 2004 - November 11, 2004, Beijing, China 作者:  Wang W.;  Wang W. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 Bragg grating has lots of use in many optical field. Especially  in dense wavelength division multiplexing system and optical filters  and so on. Holographic Bragg grating with 1800 line/mm is fabricated in this experiment. Performances of holographic Bragg gratings are measured in our lab. Results show that this holographic Bragg grating can resolve 0.26nm fine line spectrum. Diffraction efficiency of Bragg grating can get 76% in 1.55m wavelength. Results also show that this kind of holographic Bragg grating may use in DWDM device and can produce fine narrow width spectra.