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Contact-impact analys with clearance hinge in flexible multi-body system (EI CONFERENCE) 会议论文  OAI收割
2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China
Ge M.; Jia H.; Liu B.
收藏  |  浏览/下载:53/0  |  提交时间:2013/03/25
Hinge in mechanical systems exist small clearance and contact deformation  After consideration of flexible components  cause the system to the wear and tear  impact force reduced at the clearance  noise  contact time increased  vibration  contact-impact areas expand and clearance also caused disturbance of the rod angular velocity of the linkage. 2011 IEEE.  reliability reduce or even failure[1]. Therefore  the hinge clearance and the impact of flexible components in kinetic models should be considered. In this paper  a nonlinear spring-damper hinge clearance model is considered to establish mechanical system structure of dynamic equations[46]  through a four-bar linkage hinge with multi-clearance rotation of ADAMS dynamic simulation for dynamics simulation study. Simulation results show that hinge clearance and link flexible in Four-link mechanism dynamics have a great impact on performance: connection with the clearance lead to pin holes to produce a series of collisions  and a larger initial impact force  
Qualitative determination of the components of textile products using near infrared spectroscopy (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photonics and Optoelectronics, SOPO 2010, June 19, 2010 - June 21, 2010, Chengdu, China
作者:  
收藏  |  浏览/下载:29/0  |  提交时间:2013/03/25
In the paper  A total of 40 pure or two-mixed textile weaves were prepared and classification of these samples was introduced using near infrared spectroscopy (NIRS)  all textile samples are selected among four classes  which are Cotton-Terylene  Cotton-Polyurethane  Cotton and Terylene  according to theirs components. Near infrared diffuse reflectance spectra of the samples were collected  Mahalanobis distance was used to discriminate the samples coupled with principle components analysis (PCA)  the results showed that near infrared spectroscopy could determine which class one textile weave belongs to easily comparing with traditional methods. In addition  the expectation of the further research on qualitative determination of textile products by NIR technology was discussed in the end of this paper. 2010 IEEE.  
Design of an improved data signal timing for an amorphous silicon active-matrix organic LED display (EI CONFERENCE) 会议论文  OAI收割
ICO20: Display Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Zhang Z.-W.
收藏  |  浏览/下载:19/0  |  提交时间:2013/03/25
The most critical issue in the design of an active matrix organic light emitting diode (AM-OLED) display pixel is the pixel to the pixel luminance uniformity. By substituting four-thin film transistor (TFT) pixel circuit for two-TFT pixel circuit  the luminous uniformity has great improved  but it requires more components than the two-TFT pixel circuit. There are some barriers needed to resolve to utilize hydrogenated amorphous silicon transistor to lit OLED  such as low field effect mobility  low output current and threshold voltage shift. In this article  a two-a-Si:H TFT pixel circuit was designed  which consisted of one named switching TFT and the other named driving TFT. The driving TFT gate line structure modified and a data signal timing improved were reported. The modified driving TFT can provide enough current about 30 microampere to lit OLED and the novel data signal timing can provide a constant current to OLED by restraining the driving TFT threshold voltage variation. In the novel data signal timing  the control signals to the driving TFT gate include a data signal and a reverse data signal. The signals alteration is performed either at a frame rate or at a line rate. By experiments  the driving TFT output current value is plotted as a function of the time in different reversed voltage value. When the magnitude of the positive data signal and the negative data signal is equal  the variety of Vth  is smallest  about 1.28V after a fixed stressing time of 1.33104min  which shows the novel data signal timing can improved the driving TFT output-input current stability.  
An alternative method to compute the component fractions in the geometrical optical model: Visual computing method SCI/SSCI论文  OAI收割
2003
Su H. B.; Zhang R. H.; Tang X. Z.; Sun X. M.; Zhu Z. L.; Li Z. L.
收藏  |  浏览/下载:27/0  |  提交时间:2012/06/08
Thermal model for discrete vegetation and its solution on pixel scale using computer graphics 期刊论文  OAI收割
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2000, 卷号: 43, 页码: 48-54
作者:  
Su, HB;  Zhang, RH;  Tang, XZ;  Sun, XM;  Zhu, ZL
  |  收藏  |  浏览/下载:24/0  |  提交时间:2019/09/26