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浏览/检索结果: 共12条，第1-10条 帮助

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Retrieval of Global Carbon Dioxide From TanSat Satellite and Comprehensive Validation With TCCON Measurements and Satellite Observations 期刊论文  OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2022, 卷号: 60
作者:  Hong, Xinhua;  Zhang, Peng;  Bi, Yanmeng;  Liu, Cheng;  Sun, Youwen
  |  收藏  |  浏览/下载：59/0  |  提交时间：2022/02/14
Misalignment Measurement of Orbital Angular Momentum Signal Based on Spectrum Analysis and Image Processing 期刊论文  OAI收割
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2020, 卷号: 68, 期号: 1, 页码: 521-526
作者:  Gao, Xinlu;  Song, Xiyao;  Zheng, Zhennan;  Xie, Mutong;  Huang, Shanguo
  |  收藏  |  浏览/下载：26/0  |  提交时间：2020/12/10
Polarimetric remote sensing of atmospheric aerosols: Instruments, methodologies, results, and perspectives 期刊论文  OAI收割
Journal of Quantitative Spectroscopy & Radiative Transfer, 2019, 卷号: 224, 页码: 474-511
作者:  O.Dubovik;  Z.Q.Li;  M.I.Mishchenko;  D.Tanre;  Y.Karol
  |  收藏  |  浏览/下载：27/0  |  提交时间：2020/08/24
SrNO3(OH)center dot H2O: A new member in strontium nitrate hydrate family with an ultraviolet cut-off edge 期刊论文  OAI收割
JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 卷号: 695, 期号: 2, 页码: 1719-1724
作者:  Liu, LL (Liu, Lili);  Yang, Y (Yang, Yun);  Li, LP (Li, Linping);  Yang, ZH (Yang, Zhihua);  Pan, SL (Pan, Shilie)
收藏  |  浏览/下载：33/0  |  提交时间：2017/08/24
An Integrated Field and Hyperspectral Remote Sensing Method for the Estimation of Pigments Content of Stipa Purpurea in Shenzha, Tibet 期刊论文  OAI收割
MATHEMATICAL PROBLEMS IN ENGINEERING, 2017, 页码: 1-10
作者:  Kong, Bo;  He, Bing;  Yu, Huan;  Liu, Yu
  |  收藏  |  浏览/下载：30/0  |  提交时间：2017/07/07
Extraction of glacier outlines and water-eroded stripes using high-resolution SAR imagery 期刊论文  OAI收割
International Journal of Remote Sensing, 2016, 卷号: 37, 期号: 5, 页码: 1016-1034
作者:  Yang, Yan;  Li, Zhen;  Huang, Lei;  Tian, Bangsen;  Chen, Quan
收藏  |  浏览/下载：60/0  |  提交时间：2017/04/24
Polarized spectroscopic properties of Ho(3+)-doped LuLiF(4) single crystal for 2 mu m and 2.9 mu m lasers 期刊论文  OAI收割
Optical Materials, 2011, 卷号: 33, 期号: 11, 页码: 1610-1615
C. C. Zhao; Y. Hang; L. H. Zhang; J. G. Yin; P. C. Hu; E. Ma
收藏  |  浏览/下载：53/0  |  提交时间：2012/06/06
Fabrication of high-efficiency ultraviolet blazed gratings by use of direct Ar2-CHF3 ion-beam etching through a rectangular photoresist mask (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
Tan X.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
In ultraviolet spectroscopy  groove irregularity and surface roughness of nanometer magnitude can cause a significant loss of diffraction efficiency. Therefore  there is a constant need to improve the diffraction efficiency. A blazed grating can concentrate most of the light intensity into a desired diffraction order  it is important to control the groove shape precisely  so it is the optimum choice among gratings of different kinds of profile. As the operating wavelength of most UV spectral applications is less than 200 nm  especially the blaze angle and the apical angle. We have presented a direct shaping method to fabricate EUV blazed gratings by using an ion-beam mixture of Ar+ and CHF2 +to etch K9 glass with a rectangular photoresist mask. With this method  the required blaze angle is small  we have succeeded in fabricating well-shaped UV blazed gratings with a 1200 line/mm groove density and 8.54 blaze angles and 1200 line/mm groove density and 11.68 blaze angles  and the metrical efficiency is about 81% and 78%. The good performance of the gratings was verified by diffraction efficiency measurements. When one uses the etching model  the conditions on the ion-beam grazing incident angle and the CHF3partial pressure should be noted. Besides  since the etched groove shape depends on the aspect ratio of the photoresist mask ridge  if we wish to fabricate larger gratings with this method  we must improve the uniformity of the photoresist mask before ion-beam etching. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
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：26/0  |  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.  
Accurate measurement of carrier-envelope phase drift for infrared femtosecond laser pulses 期刊论文  OAI收割
opt. express, 2008, 卷号: 16, 期号: 26, 页码: 21383, 21388
Song Liwei; Zhang Chunmei; Wang Jianliang; 冷雨欣; 李儒新
收藏  |  浏览/下载：800/79  |  提交时间：2009/09/18