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《Earth Science(Journal of China University of Geosciences)》 2008-06
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Numerical Simulation of Seismic Wave Propagation Using Convolutional Differentiator

LI Xin-fu1,2,3,4,LI Xiao-fan41.State Key Laboratory of Geological Process and Mineral Resources,China University of Geosciences,Beijing 100083,China2.Key Laboratory of Geo-detection of Ministry of Education,China University of Geosciences,Beijing 100083,China3.School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China4.State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China  
To improve the accuracy and the efficiency of seismic wave simulation and to couple the local and global information better,this paper develops a novel modeling approach referring to the convolutional differentiator based on generalized Forsyte orthogonal polynomial,which applies optimal convolutional operators for spatial differentiation in wave equation.The numerical experiment of complex heterogeneous model demonstrates that the algorithm can bring reliable results with high precision and can be extended to seismic wave simulation in anisotropic media.This method is highly precise in generalized orthogonal polynomial convolutional differentiator and also highly efficient in finite difference short operator method.The local and global information can be considered at the same time by optimizing the coefficients of the operator and adjusting the operator length.
【Fund】: 中国地质大学地质过程与矿产资源国家重点实验室开放课题(No.GPMR0750);; 国家自然科学基金重点项目(No.40437018)
【CateGory Index】: P631.4
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