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浏览/检索结果: 共15条，第1-10条 帮助

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A UNIFORM SPECTRAL ANALYSIS FOR A PRECONDITIONED ALL-AT-ONCE SYSTEM FROM FIRST-ORDER AND SECOND-ORDER EVOLUTIONARY PROBLEMS 期刊论文  OAI收割
SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS, 2022, 卷号: 43, 期号: 3, 页码: 1331-1353
作者:  Wu, Shu-Lin;  Zhou, Tao;  Zhou, Zhi
  |  收藏  |  浏览/下载：21/0  |  提交时间：2023/02/07
Real-Time Evolution Dynamics of Double-Pulse Mode-Locking 期刊论文  OAI收割
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2019, 卷号: 25, 期号: 4
作者:  Wang, Guomei;  Chen, Guangwei;  Li, Wenlei;  Zeng, Chao
  |  收藏  |  浏览/下载：138/0  |  提交时间：2019/07/19
Distortion reduction in strong terahertz signals using broadband attenuators with flat transmittance 期刊论文  OAI收割
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2016, 卷号: 49, 期号: 1, 页码: 9
作者:  Peng, Xiao-Yu;  Teng, Jinghua;  Liu, Hongwei;  Tanoto, Hendrix;  Guo, Hongchen
  |  收藏  |  浏览/下载：25/0  |  提交时间：2018/03/15
Scale invariant image matching using triplewise constraint and weighted voting 期刊论文  OAI收割
neurocomputing, 2012, 卷号: 83, 页码: 64-71
作者:  Pang, Yanwei
收藏  |  浏览/下载：18/0  |  提交时间：2012/09/03
Efficient image matching using weighted voting 期刊论文  OAI收割
pattern recognition letters, 2012, 卷号: 33, 期号: 4, 页码: 471-475
作者:  Yuan, Yuan;  Pang, Yanwei;  Wang, Kongqiao;  Shang, Mianyou
收藏  |  浏览/下载：27/0  |  提交时间：2011/09/30
Destriping method using lifting wavelet transform of remote sensing image (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者:  He B.
收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25
Based on the characteristic of striping noise in remote sensing images  a new destriping noise technique for the improved multi-threshold method using lifting wavelet transform applied to remote sensing imagery is presented in this letter. Have used the lifting wavelet decomposition algorithm  the thresholds are determined by corresponding wavelet coefficients in every scale. Remote sensing imagery is so large that the algorithm must be fast and effective. The lifting wavelet transform is easily realized and inexpensive in computer time and storage space compared with the traditional wavelet transform. We also compare the method with some traditional destriping methods both by visual inspection and by appropriate indexes of quality of the denoised images. From the comparison we can see that the adaptive threshold method can preserve the spectral characteristic of the images while effectively remove striping noise and it did better than the existed ones. 2010 IEEE.  
Modulation transfer function measurement of sampled imaging systems in field test (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者:  Yang L.;  Zhang J.;  Zhang J.;  Zhang J.;  Wang J.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
A digital mirror device (DMD) based light projector was developed as the target generator in modulation transfer function (MTF) measurement. In order to overcome the sampling-scene phase effect in MTF measurement of sampled imaging systems  a method using random targets is introduced to yield a phase-averaged MTF. The main potential problem of implementing this method is the fact that the stationary assumption of the random targets may be vitiated in practical measurement  especially in field test due to the ill condition. We provide an efficient model-independent way of analyzing and isolating the spectral contents arising from these additional contributions to MTF measurement. Algorithms with adaptive parameter selection were also developed for spectral estimation of the test image in order to overcome the challenge brought by the size limit of the test matrices for one certain field of view derived from the isoplantic region. The MTF measurement of a CCD video imager is used to demonstrate the measurement technique and illustrate the benefits over other methods. In order to validate the results  comparisons have been made between MTF measurements of imager implemented using this method and bar target direct measurements. 2010 Copyright SPIE - The International Society for Optical Engineering.  
White-light spectral scanning interferometry for surface measurement system (EI CONFERENCE) 会议论文  OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者:  Wang C.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
The paper introduces the white-light spectral scanning interferometry for surface measurement. This interferometry can be used to measure the roughness of both smooth surfaces and those with large step heights. This real-time surface measurement can be achieved using acousto-optic tuneable filtering (AOTF) technique without mechanical scanning. At first  the structure and principle of this interferometry is introduced. Then the algorithm of the surface roughness measurement is proposed. What's more  the experiment with standard test piece is conducted. Compared with the traditional laser-light interferometry  the data shows that the proposed method has a higher accuracy which is proved to be nano-scale. A conclusion is given at last in which the superiorities and the limitations of the proposed system were discussed. 2010 SPIE.  
Ultraviolet photodetector fabricated from atomic-layer-deposited ZnO films (EI CONFERENCE) 会议论文  OAI收割
Shan C. X.; Zhang J. Y.; Yao B.; Shen D. Z.; Fan X. W.; Choy K. L.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
Zinc oxide (ZnO) films have been prepared on glass substrate in layer-by-layer mode using an atomic-layer deposition (ALD) technique  and a metal-semiconductor-metal structured photodetector has been fabricated on the ZnO films employing interdigital Au as metal contacts. The photodetector shows a cutoff wavelength at around 390 nm and has an obvious responsivity in the whole UVA spectral range. Because the response of the ZnO photodetector covers the whole UV solar irradiation that can reach the earth  the photodetector promises to be useful in monitoring UV solar irradiation to protect people from harm caused by the solar irradiation. Furthermore  the capability of preparing large-area uniform ZnO films of ALD makes it favorable for possible mass production of this kind of photodetector. 2009 American Vacuum Society.  
激光稳频的共焦法布里-珀罗干涉仪 期刊论文  OAI收割
中国激光, 2008, 卷号: 35, 期号: 7, 页码: 1005, 1008
孙旭涛; 刘继桥; 周军; 陈卫标
收藏  |  浏览/下载：1350/203  |  提交时间：2009/09/18