中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共9条,第1-9条 帮助

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Structural design and simulation analysis of ejector used in automotive power steering oil discharge equipment (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Mechanical Engineering, Materials Science and Civil Engineering, ICMEMSCE 2012, August 18, 2012 - August 20, 2012, Harbin, China
Cheng K.; Zou H.; Kong X.; Tang J.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
LED display image correction based on computer simulation (EI CONFERENCE) 会议论文  OAI收割
2012 International Applied Mechanics, Mechatronics Automation Symposium, IAMMAS 2012, September 7, 2012 - September 9, 2012, Shenyang, Liaoning, China
Zheng X.-F.; Chang F.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
For the purposes of correcting the LED display image  a method based on computer simulation is proposed. First  the development of the LED display panel is introduced. Second  analyze the causes of the problem which image in LED display panel has serious high nonuniformity  and introduce the existed correction techniques which are used to reduce the nonuniformity of LED display image. Simultaneously  point out the ground for shortcomings of these techniques. Third  describe the principle of correction method based on computer simulation detail from two steps  which are the luminous collection and luminous copulation. Forth  describe the realization steps of this method in accordance with the third step. Finally  this method is supplied in a LED display panel  whose resolution is 640480. Experimental results show that this method is able to reduce the non-uniformity of images from 11.06% to 0.98%. (2012) Trans Tech Publications  Switzerland.  
LED display panel grayscale modulation based on computer calculation (EI CONFERENCE) 会议论文  OAI收割
2012 International Applied Mechanics, Mechatronics Automation Symposium, IAMMAS 2012, September 7, 2012 - September 9, 2012, Shenyang, Liaoning, China
Wang R.-g.; Chang F.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
In order to improve the method of the LED display panel grayscale modulation a method based on computer calculation is proposed. First the development history and trends of the LED display panel are introduced. Second present the structure of the LED display panel and the existed modulation method. Simultaneously point out the ground for shortcomings of the existed method. Third describe the principle modulation method based on computer calculation detail from two steps which are the data signal transformation and the grayscale modulation. Forth describe the realization steps of this method in accordance with the third step. Finally this method is supplied in a LED display panel whose resolution is 320240. Experimental results show that this method is able to increase the grayscale from 14-bit to 16-bit and can enhance the display result of the LED display panel significantly. (2012) Trans Tech Publications Switzerland.  
The electromagnetic compatibility design of restrained image transmission equipments (EI CONFERENCE) 会议论文  OAI收割
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
作者:  
Wang W.;  Wang W.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
In order to improve the quality of image transmission  this paper puts forward a box shielding method that could eliminate electromagnetic interference signal on image transmission equipments. At first  this paper analyzes the shielding effectiveness of electromagnetic interference  selects the qualified shielding material and designs the structure. After that  it analyzes the descending of shielding effectiveness in the operational system  and improves the equipments shielding effectiveness by means of the electromagnetic compatibility design that accords with electromagnetic compatibility norms. At last  through the EMI radiometry  this paper confirms that the equipments are in accordance with the design requirements of electromagnetic compatibility norms. (2012) Trans Tech Publications  Switzerland.  
Effect of thickness on the structural, electrical and optical properties of ZnO films deposited by MBE (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China
Yang X.; Su S.; Yi X.; Mei T.
收藏  |  浏览/下载:26/0  |  提交时间:2013/03/25
A set of ZnO films of different thickness have been deposited on sapphire substrates using molecular beam epitaxy (MBE) by varying the growth time and the effect of film thickness on the structural  electrical and optical properties have been investigated. The X-ray diffraction (XRD) results indicate that the full width at half maximum (FWHM) of the (002) diffraction peak is decreased as the film thickness increasing  and the stress along c-axis is stable. Scanning electron microscope (SEM) measurement shows that the grains become more uniform as the film grows thicker and the film surface present distinct hexagon shape as the film is grown up to a thickness of 500nm. The optical absorbance  Hall mobility and photoluminescence (PL) intensity are increased in accordance with the thickness of the film. (2011) Trans Tech Publications  Switzerland.  
Design of ground-based physical simulation system for satellite-borne TDI-CCD dynamic imaging (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:  
Zhang L.;  Zhang L.;  Sun Z.
收藏  |  浏览/下载:24/0  |  提交时间:2013/03/25
As we know  the existence of image motion has a bad effect on the image quality of satellite-borne TDI CCD camera. Although many theories on image motion are proposed to cope with this problem  few simulations are done to justify the proposed theories on ground. And thus  in this paper  a ground-based physical simulation system for TDI CCD imaging is developed and specified  which consists of a physical simulation subsystem for precise satellite attitude control based on a 3-axis air bearing table  and an imaging and simulation subsystem utilizing area-array CCD to simulate TDI CCD. The designed system could realize not only a precise simulation of satellite attitude control  whose point accuracy is above 0.1 and steady accuracy above 0.01/s  but also an imaging simulation of 16-stage TDI CCD with 0.1s its integration time. This paper also gives a mathematical model of image motion of this system analogous with satellite-borne TDI CCD  and detailed descriptions on the principle utilizing area-array CCD to simulate TDI CCD. It is shown that experiment results are in accordance with mathematical simulation  and that the image quality deteriorate seriously when the correspondence between the image velocity and signal charges transfer velocity is broken out  which suggest not only the validity of the system design but also the validity of the proposed image motion theory of TDI CCD. 2010 SPIE.  
Gray level correction algorithm of LED display panel based on least squares approximation (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者:  
Sun Z.-Y.
收藏  |  浏览/下载:22/0  |  提交时间:2013/03/25
Aiming at the problem that the linear characteristic of LED display panel is not compatible with the non-linear characteristic of image data  this leads to appear the large deviation during grayscale rendition  the gray level correction algorithm based on least squares approximation is provided. First  the necessity of gray level correction is analyzed. Then  the gray level correction algorithm model is constructed according to the principle of latest squares approximation. Next  realization steps are described in accordance with this constructed algorithm model. Finally  this algorithm is implemented in a LED display panel  whose resolution is 128128. Experimental results show that this algorithm is able to reduce the deviation obviously during grayscale rendition and the problem of gray level deformation can be resolved perfectly because the linear relation between image data after correcting and gray level is good which satisfies the linear characteristic of LED display panel. 2010 IEEE.  
ON THE SLUG-ANNULAR TRANSITION OF TWO-PHASE GAS-LIQUID FLOWS AT MICROGRAVITY 会议论文  OAI收割
5th China-Japan Workshop on Microgravity Sciences, Dunhuang,Gansu Province, China, 2002-09-01
作者:  
Zhao JF(赵建福);  Hu WR(胡文瑞)
收藏  |  浏览/下载:20/0  |  提交时间:2015/09/10
ON THE BOUND STATE EQUATION OF MESONS AND ITS SOLUTIONS 期刊论文  OAI收割
Science in China;Ser.A, 1978, 期号: 1, 页码: 44-61
作者:  
Xian DC(冼鼎昌);  Wu JW(吴坚武);  Ji S(计数);  Gao L(高仑)
收藏  |  浏览/下载:11/0  |  提交时间:2015/12/07