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A well-conditioned and efficient implementation of dual reciprocity method for Poisson equation 期刊论文  OAI收割
AIMS MATHEMATICS, 2021, 卷号: 6, 期号: 11, 页码: 12560-12582
作者:  
Khan, Suliman;  Khan, M. Riaz;  Alqahtani, Aisha M.;  Shah, Hasrat Hussain;  Issakhov, Alibek
  |  收藏  |  浏览/下载:17/0  |  提交时间:2022/04/02
Advances in Infrared Spectrum Zoom Imaging System Research 期刊论文  OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 卷号: 34, 期号: 12, 页码: 3419-3423
作者:  
Bai Yu;  Xing Ting-wen;  Jiang Ya-dong
收藏  |  浏览/下载:130/0  |  提交时间:2015/07/10
An ultra-low power cmos random number generator 期刊论文  iSwitch采集
Solid-state electronics, 2008, 卷号: 52, 期号: 2, 页码: 233-238
作者:  
Zhou, Sheng-hua;  Zhang, Wancheng;  Wu, Nan-Jian
收藏  |  浏览/下载:22/0  |  提交时间:2019/05/12
An ultra-low power CMOS random number generator 期刊论文  OAI收割
solid-state electronics, 2008, 卷号: 52, 期号: 2, 页码: 233-238
Zhou, SH; Zhang, W; Wu, NJ
收藏  |  浏览/下载:72/15  |  提交时间:2010/03/08
Design of dual-FOV refractive/diffractive LWIR optical system (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者:  
Wang L.-J.;  Zhang J.-P.;  Wang L.-J.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:33/0  |  提交时间:2013/03/25
An infrared-optical zoom system using binary element is proposed in this paper. The two main advantages of the zoom system introducing here are: bigger F-number and lower cost. The primary optical properties are: F/#=1  Second  Others  zoom ratio =1:4  binary element is used to correct the chromatical aberration by taking the advantage of negative dispersion characteristics and the cost of the system is lower than that of conventional ones with Zinc Selenide (Znse) material at the same level. In the binary element is rotational symmetric with one step which is easy to fabricate  in order to balance 5th spherical aberration  and dual field are 26.6 and 5.6respectively. Wider field of view is used for search and the smaller one is used for imaging details. This system uses un-cooled infrared detector with 320240 pixels and 45m pixel size. The F-number matches the sensitivity range of the detector array. Three aspects are considered during design process to make the system more satisfactory and more achievable. First  5th coma aberration and 5th astigmatic aberration  the manner of zoom is accomplished by exchanging tow lenses into the smaller field of view system layout. The lens exchange manner faces the requirement of simple system structure and good image quality in both focal points. It can also make the system more feasible in the alignment process than mechanical-zooming manner and optical-zooming manner  high-order asphere surfaces with 2th order to 10 th order are also hired in the system. Asphere surface is useful in compressing the system and improving optical system transmittance. This kind asphere surface is on industrial level featuring low cost and easy to fabricate. It is shown that good image quality can achieved by implementing five Germanium lenses and the transmittance of system is 72%. All aberrations are diffraction-limited  both spherical aberration and astigmatic aberration are corrected. When the field of view(FOV) is 26.6 and the focal length is 152mm  MTF at Nyquist frequency(11lp/mm) is great than 0.7. The spherical aberration is -0.0073. The coma aberration is 0.0978 and the astigmatic aberration is -0.013. When the field of view(FOV) is 5.6 and the focal length is 38mm  MTF at Nyquist frequency is great than 0.8 with spherical aberration -0.0046  the coma aberration 0.055 and astigmatic aberration 0.034.  
透视N点/线定位问题研究 学位论文  OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2006
作者:  
张彩霞
收藏  |  浏览/下载:201/0  |  提交时间:2015/09/02