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Chinese Academy of Sciences Institutional Repositories Grid
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Real-Time 2-D Optical Polarization Properties of the Fusion Reactor First Mirror Based on Active Polarized Beams 期刊论文  OAI收割
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2018, 卷号: 46, 期号: 5, 页码: 1186-1190
作者:  
Qi, Junli;  Wang, Weihua;  Pan, Baoguo;  Zhang, Hui;  Yang, Jinhong
  |  收藏  |  浏览/下载:63/0  |  提交时间:2019/06/10
The measuring method for low rotational speed with the frequency difference generated by radial gratings (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
Guo W.-l.; Qiao Y.-f.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
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:  
Li M.
收藏  |  浏览/下载:26/0  |  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.  
Design and realization of the real-time spectrograph controller for LAMOST based on FPGA 会议论文  OAI收割
Marseille, France, 2008-6-23
作者:  
Zhongwen Hu;  Yongtian Zhu;  Zhen Wu;  Yi Chen;  Jianing Wang
收藏  |  浏览/下载:49/0  |  提交时间:2014/01/01
Target track system design based on circular projection (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
Song H.-J.; Zhu M.; Hu S.; Shen M.-L.
收藏  |  浏览/下载:29/0  |  提交时间:2013/03/25
Template matching is the process of searching the present and the location of a reference image or an object in a scene image. Template matching is a classical problem in a scene analysis: given a reference image of an object  decide whether that object exists in a scene image under analysis  and find its location if it does. The template matching process involves cross-correlating the template with the scene image and computing a measure of similarity between them to determine the displacement. The conventional matching method used the spatial cross-correlation process which is computationally expensive. Some algorithms are proposed for this speed problem  such as pyramid algorithm  but it still can't reach the real-time for bigger model image. Moreover  the cross-correlation algorithm can't be effective when the object in the image is rotated. Therefore  the conventional algorithms can't be used for practical purpose. In this paper  an algorithm for a rotation invariant template matching method based on different value circular projection target tracking algorithm is proposed. This algorithm projects the model image as circular and gets the radius and the sum of the same radius pixel value. The sum of the same radius pixel value is invariable for the same image and the any rotated angle image. Therefore  this algorithm has the rotation invariant property. In order to improve the matching speed and get the illumination invariance  the different value method is combined with circular projection algorithm. This method computes the different value between model image radius pixel sum and the scene image radius pixel sum so that it gets the matching result. The pyramid algorithm also is been applied in order to improve the matching speed. The high speed hardware system also is been design in order to meet the real time requirement of target tracking system. The results show that this system has the good rotate invariance and real-time property.  
adaptive real-time publish-subscribe service model for mobile communication environments 会议论文  OAI收割
2nd International Conference on Computer Networks and Mobile Computing, SHANGHAI, PEOPLES R CHINA, OCT 20-23,
Wang Q; Wang HA; Tang H; Dai GZ
  |  收藏  |  浏览/下载:23/0  |  提交时间:2011/07/29