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《Chinese Journal of Geophysics》 2008-06
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Time-staggered difference for pseudospectral differentiation openrator and its application in 3-D heterogeneous medium

WU Ye1,2,LI Xiao-Fan2,GU Guan-Wen3,ZHANG Mei-Gen2,LONG Gui-Hua2,ZHAO Xiao-Yan11 Institute of Disaster Prevention Science and Technology,Beijing Yanjiao 065201,China2 Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China3 Institute of Geophysical and Geochemical Exploration,Langfang 065000,China  
A new fast differentiation operator,"pseudospectral time-staggered difference operator",is proposed in this paper.The accuracy of this method is four time of the normal pseudospectral method.It is confirmed that the numerical dispersion of this method is less than that of normal pseudospectral method by comparing the calculation result of Marmousi model.The new operation is applied to simulate seismic wave propagation in 3-D heterogeneous medium,and the results show that the time-staggered difference operator for the pseudospectral method is valid for the seismic wave simulation in the complex heterogeneous medium.
【Fund】: 国家自然科学基金重点项目(40437018);; 国家自然科学基金青年基金项目(40304004);; 国家杰出青年科学基金项目(40025412);; 防灾科技学院防灾减灾青年科技基金项目联合资助
【CateGory Index】: P631.4
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