中国科学院机构知识库网格
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浏览/检索结果: 共7条,第1-7条 帮助

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Study of contact resistance in the design of a pyro-breaker applied in superconducting fusion facility 期刊论文  OAI收割
Plasma Science & Technology, 2019, 卷号: 21
作者:  
He Jun;  Song Zhiquan;  Tang Cunwen;  Fu Peng;  Zhang Jie
  |  收藏  |  浏览/下载:38/0  |  提交时间:2020/11/25
Laser-assisted Four Point Bending of Aluminium Sheet 期刊论文  OAI收割
LASERS IN ENGINEERING, 2018, 卷号: 41, 页码: 205-217
作者:  
Peng Q(彭青)
  |  收藏  |  浏览/下载:28/0  |  提交时间:2018/10/19
Comparison and simulation of subpixel imaging modes for linear CCD (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:  
Li Y.;  He B.;  Li Y.;  Li Y.;  Li Y.
收藏  |  浏览/下载:36/0  |  提交时间:2013/03/25
Subpixel technique of linear CCD is effective to enhance the spatial resolution without increasing the focal length of optics and reducing the pixel size. To compare image quality of two main subpixel imaging modes  quincunx sampling and four-point sampling  a method to quantitatively evaluate image quality of subpixel based on MTF was proposed. The MTF of quincunx and four-point sampling modes were derived. Analytical results shows that theoretical limiting resolution of quincunx sampling and four-point sampling is improved to 1.4 and 1.86 times respectively  and MTF values at Nyquist frequency of two modes are increased by 0.1106 and 0.1679  respectively. MTFA in (0  0.5) of two subpixel imaging modes were calculated and results illustrates that four-point sampling offers much more improvement with image quality than quincunx sampling  at the cost of double amount of data. A model for simulating subpixel imaging using Matlab was established  and simulation results of spoke target verify the theoretical analysis. (2012) Trans Tech Publications  Switzerland.  
Numerical simulation on efficient spinning technology based on multi-point adjusting principle (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Manufacturing Science and Engineering, ICMSE 2011, April 9, 2011 - April 11, 2011, Guilin, China
Gong X. P.
收藏  |  浏览/下载:24/0  |  提交时间:2013/03/25
In order to realize high efficiency and flexible manufacturing for rotary surfaces  equivalent stress in sheet metal's center region and bendable rollers active region exceeds yield stress  efficient spinning technology (EST) is researched. It is the combination of multi-point forming and traditional spinning. Principle of EST is described  and plastic deformation is generated  traditional spinning method is compared with it  experimental result accords with simulation result. Feasibility of EST is validated by simulation and experimental results. (2011) Trans Tech Publications.  and characteristics of it are analyzed. Finite element analysis (FEA) model of disc-shape part is established  EST process is analyzed  equivalent stress and plastic strain distributions are analyzed. EST equipment is developed  and the experiments are made. Results indicate: EST process consists of four stages  
The study of mapping relation of aeroplane complex motion and image movement and compensation technique (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer Application and System Modeling, ICCASM 2010, October 22, 2010 - October 24, 2010, Shanxi, Taiyuan, China
Wei Z.; Wang Y.-Y.; Xue W.-Q.; Dai M.
收藏  |  浏览/下载:20/0  |  提交时间:2013/03/25
In order to solve the problem of image blurring due to the image motion which results from the aircraft's motion  attitude changes  and the relative motion of the camera and aircraft firstly  we install linear displacement transducer on the four shock absorbers. By analyzing the displacement values  the geometrical relationship between the camera and the aircraft is acquired  then relative motion amount between the object and the aircraft is obtained according to the motion and attitude changes. After that  making use of geometrical relationship  we can calculate the displacement variation of pixels within the camera exposure time. Thereafter  taking consider variable motion and non-linear motion as uniform motion in a straight line at the moment of imaging  then the model of the blurring image can be established according to the displacement variation of pixels within the camera exposure time  and fuzzy point spread function in the two-dimensional movement is built. By using Wiener filtering method with the optimal window  the image blurring is eliminated in aerial imaging system. Practice proved that this method can effectively eliminate the image blurring in the aerial imaging system. 2010 IEEE.  
Interface Fracture Property Of Peo Ceramic Coatings On Aluminum Alloy 期刊论文  OAI收割
Surface & Coatings Technology, 2008, 页码: 4204-4209
作者:  
Guan YJ(关永军);  Xia Y(夏原);  Xu FT(徐方涛)
收藏  |  浏览/下载:850/54  |  提交时间:2009/08/03
Upper and lower solution method for fourth-order four-point boundary value problems 期刊论文  OAI收割
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2006, 卷号: 196, 期号: 2, 页码: 387-393
作者:  
Zhang, Qin;  Chen, Shihua;  Lu, Jinhu
  |  收藏  |  浏览/下载:17/0  |  提交时间:2018/07/30