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《Chinese Journal of Geophysics》 1995-06
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THE INTERFACE GRID METHOD FOR SEEKING GLOBALMINIMUM TRAVEL-TIME AND THE CORRESPONDENT RAYPATH

LIU HONG MENG FAN-LIN LI YOU-MING(Institute of Geopysics,Academia Sinica,Beijing 100101)  
This method discretized the computed two-dimensional media into a networkconsists of a series of rectangular pixels,and put the computing network nodes onthe sides of each pixels.On the bases of Huygens'Principle and Fermat's Pinciple,we get the global minimum travel time on each nodes and their correspondingsecondary sources,using the wavefront point scanning instead of wavefront pointsorting,combined with the local minimum travel-time computing for each wavefront pionts using hyperbolic approximation.This method has the following characteristics,such as:1.high c.omputing precision,2.robusteness even in solving the media Wwith very high velocity differences,3.less memory is needed,4.the accurately Computed travel-time and corresponding raypath can be easily used in travel time inversion and the wavefield computation based on the Maslov ray theory.
【Fund】: 国家自然科学基金委员会、中国科学院、中国石油天然气总公司、大庆石油管理局联合资助
【CateGory Index】: P631.42
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1 CUI Yan;WANG Yan-Fei;Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics, Chinese Academy of Sciences;Shengli College,China University of Petroleum;University of Chinese Academy of Sciences;;Tikhonov regularization and gradient descent algorithms for tomography using first-arrival seismic traveltimes[J];地球物理学报;2015-04
2 Lu Jiangbo;Fang Zhi;College of Civil Engineering,Hunan University;;An improved ray-tracing algorithm based on linear travel-time interpolation[J];地震学报;2014-06
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4 ZHAO Hou-Yue;ZHANG Mei-Gen;Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics Chinese Academy of Sciences;University of Chinese Academy of Sciences;;Tracing seismic shortest path rays in anisotropic medium with rolling surface[J];地球物理学报;2014-09
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