中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Reciprocal cross-correlation analysis of two-phase seepage processes and reservoir heterogeneities in CO2 saline aquifer sequestration 期刊论文  OAI收割
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY, 2024, 页码: 15
作者:  
Zhong, Yiyan;  Li, Qi;  Xu, Liang;  Wen, Yiping;  Li, Yukun
  |  收藏  |  浏览/下载:1/0  |  提交时间:2025/06/27
Influence of collision energy on the stereodynamics of the H+CH+ -> C+ + H-2 reaction 期刊论文  OAI收割
ACTA PHYSICA SINICA, 2017, 卷号: 66, 期号: 2
作者:  
Yu Dong-Qi;  Tang Xiao-Ping;  Zhou Can-Hua;  He Xiao-Hu;  Yang Yang
  |  收藏  |  浏览/下载:31/0  |  提交时间:2019/06/20
Characteristics of seismicity of the Xiaowan reservoir in an area of active tectonics from double-difference relocation analysis 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2016, 卷号: 59, 期号: 7, 页码: 2468-2485
作者:  
Jiang Jin-Zhong;  Fu Hong;  Chen Qi-Fu
  |  收藏  |  浏览/下载:28/0  |  提交时间:2017/11/22
A computational analysis of interaction mechanisms of peptide and non-peptide inhibitors with MDMX based on molecular dynamics simulation 期刊论文  OAI收割
computational and theoretical chemistry, 2012, 卷号: 984, 页码: 43-50
作者:  
Cheng, Wei-yuan;  Chen, Jian-zhong;  Liang, Zhi-qiang;  Li, Guo-hui;  Yi, Chang-hong
收藏  |  浏览/下载:30/0  |  提交时间:2013/10/11
Improved method of target detection on optoelectronic hybrid joint transform correlator in cluttered scences (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:  
Yang L.;  Yang L.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
A classical joint transform correlator (JTC) usually yields large correlation sidelobes as well as a large correlation peak width  strong zero-order peak  and low diffraction efficiency  which make the detection ability of JTC lower. To overcome these difficulties  firstly  a joint power spectrum (JPS) subtraction technique in Fourier plane was proposed  where reference image power spectrum and object image power spectrum are subtracted from the JPS before inverse Fourier-transform operation  it is obvious that the modified JPS removes the zero-order term. Secondly  a fringe-adjusted filter (FAF) was presented to suppress sidelobes and noises. The modified JPS is multiplied by a FAF before the inverse Fourier-transform operation to obtain the cross-correlation peak. Computer simulations demonstrated the improved method can obviously remove zero-order diffraction and effectively suppress the sidelobes and noises compared with classic JTC  and then improve the detection ability for JTC. Experimental results presented the sharp correlation peak and also confirmed the method effectiveness. (2012) Trans Tech Publications  Switzerland.  
A real-time two-dimensional correlation speed measurement based on image (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:  
Yu L.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
In order to implement two-dimensional moving object's non-contact and real-time speed measurement  in this paper  wc proposed a new method which was based on the characteristic of FPGA and a real-time two-dimensional correlation speed measurement was proposed on image processing using high speed CMOS shown in figure 1. Experimental installation was shown in figure 2  a cardboard with images which was fixed in electric control movement device was moving to simulate moving object  the CMOS image sensor gathered image signals of the cardboard and the image signals was output to FPGA after a serials pretreatment such as binaryzation etc. Logical operation insteaded mathematical operation on FPGA to implement two frames image's cross-correlation operations as the formula (10) in this paper  and finally calculate the two-dimensional velocity. Through experiment result of table 1 we drawn an conclusion the accurarcy of the method in this paper was less than 1 pixel and the method can be used at a certain speed ranges of two-dimensional  real-time speed measurement. 2010 IEEE.  
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:24/0  |  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.