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《Oil Geophysical Prospecting》 2010-05
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Seismic data fast matching pursuit based on dynamic matching wavelet library

Zhang Fan-chang1,Li Chuan-hui1 and Yin Xing-yao1. 1. College of Geo-resources and Information,China University of Petroleum (East China),Dongying City,Shandong Province,257061,China  
Based on improved algorithm by liu et al.,thking Morlet wavelet as basic matching wavelet,making fully using of the instantaneous characteristics of seismic signal to determine the scanning range dynamically and creating a dynamic wavelet library according to characteristics of seismic signal itself in determination of controlling parameters;and then determning the several matchng wavelet simultaneously through one iteration,using the matching wavelets to control the relationship among the parameters,the dual-parameter fast matching tracing algorithm was proposed in this paper,which further reduced the number of scanning parameters and greatly raised the calculation efficiency.In order to gain faster convergence of the algorithm,the energy of the residual signal was utilized to effectively control the iteration times for the fast matching tracing algorithm,which not only avoid the meaningless calculation,but also could remove random noise. Finaly,by utilizing independence of each matching wavelet,a variable window short-time Fourier transform method was proposed and used,through which the time-frequency distribution map was obtained.
【Fund】: 国家高技术研究发展计划(863)(2006AA09A102);; 国家自然科学基金(40739908)资助
【CateGory Index】: P631.443
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【References】
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Chinese Journal Full-text Database 10 Hits
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