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浏览/检索结果: 共6条,第1-6条 帮助

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Identifying the comprehensive pore structure characteristics of a rock from 3D images 期刊论文  OAI收割
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2020, 卷号: 187, 页码: 16
作者:  
Xu ZP(徐志朋);  Lin M(林缅);  Jiang WB(江文滨);  Cao GH(曹高辉);  Yi ZX(易智星)
  |  收藏  |  浏览/下载:42/0  |  提交时间:2020/04/07
Determination of the geometric parameters kappa(z) and kappa(r) of a linear Paul trap 期刊论文  OAI收割
CHINESE JOURNAL OF PHYSICS, 2019, 卷号: 60, 页码: 61-67
作者:  
Li, H. X.;  Zhang, Y.;  He, S. G.;  Tong, X.
  |  收藏  |  浏览/下载:33/0  |  提交时间:2019/10/14
Optimization of the geometric parameters of the EAST articulated maintenance arm (EAMA) with a collision-free workspace determination in EAST 期刊论文  OAI收割
FUSION ENGINEERING AND DESIGN, 2019, 卷号: 139, 期号: 无, 页码: 155-162
作者:  
Wang, Kun;  Wang, Qi;  Cheng, Yong;  Wu, Huapeng;  Song, Yuntao
  |  收藏  |  浏览/下载:25/0  |  提交时间:2020/05/21
Thermal analysis for wire scanners in the CSNS Linac 期刊论文  OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2014, 卷号: 760, 页码: 10-18
作者:  
Yang T(杨涛);  Fu SN(傅世年);  Xu TG(徐韬光);  Yang, T;  Fu, SN
收藏  |  浏览/下载:28/0  |  提交时间:2016/04/08
A line mapping based automatic registration algorithm of infrared and visible images 会议论文  OAI收割
5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications, Beijing, June 25-27, 2013
作者:  
Ai R(艾锐);  Shi ZL(史泽林);  Xu DJ(徐德江);  Zhang CS(张程硕)
收藏  |  浏览/下载:36/0  |  提交时间:2013/12/26
There exist complex gray mapping relationships among infrared and visible images because of the different imaging mechanisms. The difficulty of infrared and visible image registration is to find a reasonable similarity definition. In this paper, we develop a novel image similarity called implicit linesegment similarity(ILS) and a registration algorithm of infrared and visible images based on ILS. Essentially, the algorithm achieves image registration by aligning the corresponding line segment features in two images. First, we extract line segment features and record their coordinate positions in one of the images, and map these line segments into the second image based on the geometric transformation model. Then we iteratively maximize the degree of similarity between the line segment features and correspondence regions in the second image to obtain the model parameters. The advantage of doing this is no need directly measuring the gray similarity between the two images. We adopt a multi-resolution analysis method to calculate the model parameters from coarse to fine on Gaussian scale space. The geometric transformation parameters are finally obtained by the improved Powell algorithm. Comparative experiments demonstrate that the proposed algorithm can effectively achieve the automatic registration for infrared and visible images, and under considerable accuracy it makes a more significant improvement on computational efficiency and anti-noise ability than previously proposed algorithms.  
Optimum design of the carbon fiber thin-walled baffle for the space-based camera (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Yan Y.; Gu S.; An Y.; Jin G.
收藏  |  浏览/下载:13/0  |  提交时间:2013/03/25
The thin-walled baffle design of the space-based camera is an important job in the lightweight space camera research task for its stringent quality requirement and harsh mechanical environment especially for the thin-walled baffle of the carbon fiber design. In the paper  an especially thin-walled baffle of the carbon fiber design process was described and it is sound significant during the other thin-walled baffle design of the space camera. The designer obtained the design margin of the thin-walled baffle that structural stiffness and strength can tolerated belong to its development requirements through the appropriate use of the finite element analysis of the walled parameters influence sensitivity to its structural stiffness and strength. And the designer can determine the better optimization criterion of thin-walled baffle during the geometric parameter optimization process in such guiding principle. It sounds significant during the optimum design of the thin-walled baffle of the space camera. For structural stiffness and strength of the carbon fibers structure which can been designed  the effect of the optimization will be more remarkable though the optional design of the parameters chose. Combination of manufacture process and design requirements the paper completed the thin-walled baffle structure scheme selection and optimized the specific carbon fiber fabrication technology though the FEM optimization  and the processing cost and process cycle are retrenchment/saved effectively in the method. Meanwhile  the weight of the thin-walled baffle reduced significantly in meet the design requirements under the premise of the structure. The engineering prediction had been adopted  and the related result shows that the thin-walled baffle satisfied the space-based camera engineering practical needs very well  its quality reduced about 20%  the final assessment index of the thin-walled baffle were superior to the overall design requirements significantly. The design method is reasonable and efficient to the other thin-walled baffle that mass and work environment requirement is requirement harsh. 2011 SPIE.