中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Fully Unsupervised Person Re-Identification by Enhancing Cluster Samples 会议论文  OAI收割
Virtual, Online, China, 2021-12-16
作者:  
Chen, Xiumei;  Zheng, Xiangtao;  Zhu, Kaijian;  Lu, Xiaoqiang
  |  收藏  |  浏览/下载:46/0  |  提交时间:2022/04/11
A novel approach for the registration of weak affine images 期刊论文  OAI收割
PATTERN RECOGNITION LETTERS, 2012, 卷号: 33, 期号: 12, 页码: 1647-1655
作者:  
Li, Dong;  Zhang, Yunhua
收藏  |  浏览/下载:20/0  |  提交时间:2014/12/15
Research on computer control strategy for optical electric tracking system (EI CONFERENCE) 会议论文  OAI收割
2011 IEEE International Conference on Mechatronics and Automation, ICMA 2011, August 7, 2011 - August 10, 2011, Beijing, China
作者:  
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
In this paper  mathematic model and computer control strategy for optical electrical tracking system have been researched and discussed. First  the system's structure and its work process have been analyzed. Second  according to the system's moving law  the system's mathematic model has been built. As to the computer control strategy  trigger guiding  two closed loop PID control method as well as compound control method have been applied to satisfy the tracking accuracy. Third  we apply the bilinear transformation to get the digital system  and the sample time is 800Hz. The simulation results indicate that the maximum tracking error can be limited to less than 0.5 and the regulator time can be 0.04s. Then the control project resonance frequency should be more than 200Hz and the sample frequency should be more than 400Hz to meet the control accuracy requirement. So we can conclude that the system indexes such as swiftness  high accuracy as long as real time have been satisfied. And the requirement of mechanical property has been present which is very useful to mechanical working. 2011 IEEE.  
Temperature-enhanced ultraviolet emission in ZnO thin film (EI CONFERENCE) 会议论文  OAI收割
Zhang Y. J.; Xu C. S.; Liu Y. C.; Liu Y. X.; Wang G. R.; Fan X. W.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
We have studied the structural and optical properties of ZnO thin films prepared by thermal oxidation of ZnS films deposited by plasma assisted electron-beam evaporation on Si(1 0 0) substrates. The transformation from zinc blende ZnS to hexagonal wurtzite ZnO is confirmed by Raman and X-ray diffraction (XRD) measurement. For the sample thermally oxidized at 600 C for 2 h  a novel UV emission peak Ix located at 3.22 eV (385 nm) has been observed. The temperature-dependent photoluminescence spectra show that the integrated intensity of Ix increases exponentially with increasing temperatures within the measuring temperature range  from 80 to 300 K  but the peak position remains nearly constant. We explain this behavior in terms of electron tunneling into the radiative recombination centers.