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Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共19条,第1-10条 帮助

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Structured mesh refinement in MLS-based numerical manifold method and its application to crack problems 期刊论文  OAI收割
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS, 2017, 卷号: 84, 页码: 42-51
作者:  
Liu, Feng;  Xia, Kaiwen
  |  收藏  |  浏览/下载:26/0  |  提交时间:2018/06/05
Exact imposition of essential boundary condition and material interface continuity in Galerkin-based meshless methods 期刊论文  OAI收割
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 2017, 卷号: 110, 期号: 7, 页码: 637-660
作者:  
Li, Wei;  Zheng, Hong;  Du, Xiuli
  |  收藏  |  浏览/下载:26/0  |  提交时间:2018/06/05
Self-adaptive echo signal processing method for pulse radar ranging system 会议论文  OAI收割
2016 IEEE Information Technology, Networking, Electronic and Automation Control Conference, ITNEC 2016, Chongqing, China, May 20-22, 2016
作者:  
Gao J(高洁);  Du JS(杜劲松);  Bi X(毕欣)
收藏  |  浏览/下载:45/0  |  提交时间:2016/11/01
A sub-pixel extraction method for the center of the circular structure from spot array calibration target (EI CONFERENCE) 会议论文  OAI收割
2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China
作者:  
Liu Y.;  Zhang T.
收藏  |  浏览/下载:75/0  |  提交时间:2013/03/25
Simulation test research of using the Ritchey-Common method for the detection of large flat mirror (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Frontiers of Advanced Materials and Engineering Technology, FAMET 2012, January 4, 2012 - January 5, 2012, Xiamen, China
作者:  
Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:17/0  |  提交时间:2013/03/25
Application of trend extrapolation method to spectrum analysis of microtremor signal (EI CONFERENCE) 会议论文  OAI收割
2nd World Congress on Computer Science and Information Engineering, CSIE 2011, June 17, 2011 - June 19, 2011, Changchun, China
Zhou X.; Guo T.; Jiao J.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
Research on image restoration of Roll-Swing imaging seeker (EI CONFERENCE) 会议论文  OAI收割
3rd IEEE International Conference on Advanced Computer Control, ICACC 2011, January 18, 2011 - January 20, 2011, Harbin, China
作者:  
Zhang H.;  Zhang H.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
To achieve a correct image receiving for Roll-Swing imaging seeker  the mechanism and imaging process is analyzed. The causes of image rotation are discussed. The influence of the frame encoders' precision on imaging de-rotation quality is analyzed. The Roll-Swing imaging seeker is designed for high-speed aerocraft  thus the received images are greatly degraded due to atmospheric turbulence. A new method of image restoration is proposed for turbulence-degraded images in this paper. The method is to get point spread function (PSF) based on the estimation of optical transfer function (OTF) according to the optical system design simulation. Finally  to obtain the restored image  constrained least squares filtering is used with the known PSF. The experiment results indicate that the new restoration method has a favorable effect to satisfy requirement of the automatic target recognition. 2011 IEEE.  
Accuracy analysis and optimization design of constant-diameter cam (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Yuan G.-Q.; Ding Y.-L.; Hui S.-W.; Liu Z.-H.; Li Y.-W.
收藏  |  浏览/下载:35/0  |  提交时间:2013/03/25
Contribution of Molecular Properties to Extrapolation of the Volume of Distribution in Human from Preclinical Animal Species Data 期刊论文  OAI收割
BIOPHARMACEUTICS & DRUG DISPOSITION, 2010, 卷号: 31, 期号: 8-9, 页码: 464-475
作者:  
Sui, Xiaofan;  Sun, Jin;  Li, Haiyan;  Pan, Yang;  Wang, Yongjun
  |  收藏  |  浏览/下载:25/0  |  提交时间:2019/01/08
Design of aspherical surfaces for panoramic imagers using multipopulations genetic algorithm (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  
Jin C.-S.;  Wang L.-P.;  Liang Z.-Z.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
A design method of aspherical surface for panoramic imaging system with two mirrors using multi-populations genetic algorithms is proposed. Astigmatism induced by mirrors may significantly compromise image resolution. To solve this problem  we induced algebraic expression of astigmatism in panoramic imager based on generalized Coddington equation and theory of geometric optics. Then  we propose an optimization process for mirror profile design to eliminate astigmatism and provide purposely-designed projection formula with aid of MPGA. A series of polynomial expressions of aspherical surfaces are obtained and procedures of the design are presented. In order to facilitate ray tracing and aberration calculation  even asphere surface model is obtained by using of hybrid schemes combining MPGA and damped least squares. Finally  a prototype of the catadioptric panoramic imager has been developed and panoramic ring image is obtained. 2009 SPIE.