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长春光学精密机械与物... [3]
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数学与系统科学研究院 [1]
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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
quench protection system
pyro-breaker
contact resistance
four-point-method
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
Nd:Yag Laser
Aa6061-t6 Aluminium Alloy
Finite Element Method (Fem)
Laser-assisted
Four Point Bending
Pre-stress Forming
Spring-back
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
Peo Coatings
Interface Fracture
Four-Point Bending
Finite Element Method
Plasma Electrolytic Oxidation
Microarc Oxidation
Corrosion-Resistance
Composite Coatings
Oxide Coatings
Tribological Behavior
Mechanical-Properties
Magnesium Alloy
Al2O3 Coatings
Performance
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
lower and upper solution method
fourth-order ordinary differential equation
four-point boundary conditions