[an error occurred while processing this directive] Global Geology 2020, 23(1) 24-31 DOI:   10.3969/j.issn.1673-9736.2020.01.03  ISSN: 1673-9736 CN: 22-1371/P
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本文关键词相关文章
generalized Born approximation
gradient scattering
implementation technology
numerical simulation
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PubMed
Computation of waves scattered by inhomogeneousvelocity gradient using generalized Born approximation
LIU Bo, SUN Jianguo, MENG Xiangyu
College Of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China
摘要： The generalized Born approximation is an approximation method that represents the scattering term by the error between the exact Green's function and the approximate Green's function, mainly for the gradient scattering problem. However, so far, the research on the generalized Born approximation has only stayed in theory, and its implementation techniques are rarely reported. In order to fill this gap, the basic theory of generalized Born approximation is reviewed, and the implementation method of generalized Born approximation is discussed in this paper. In particular, the problem of calculating boundary effect elimination is discussed in detail. Finally, through model trial calculation, the calculation of gradient scattering, by comparing Born approximation and finite difference method, shows that using the generalized Born approximation to calculate gradient scattering achieves higher computational accuracy.
关键词： generalized Born approximation   gradient scattering   implementation technology   numerical simulation  
Computation of waves scattered by inhomogeneousvelocity gradient using generalized Born approximation
LIU Bo, SUN Jianguo, MENG Xiangyu
College Of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China
Abstract: The generalized Born approximation is an approximation method that represents the scattering term by the error between the exact Green's function and the approximate Green's function, mainly for the gradient scattering problem. However, so far, the research on the generalized Born approximation has only stayed in theory, and its implementation techniques are rarely reported. In order to fill this gap, the basic theory of generalized Born approximation is reviewed, and the implementation method of generalized Born approximation is discussed in this paper. In particular, the problem of calculating boundary effect elimination is discussed in detail. Finally, through model trial calculation, the calculation of gradient scattering, by comparing Born approximation and finite difference method, shows that using the generalized Born approximation to calculate gradient scattering achieves higher computational accuracy.
Keywords: generalized Born approximation   gradient scattering   implementation technology   numerical simulation  
收稿日期 2019-09-09 修回日期 2019-10-15 网络版发布日期  
DOI: 10.3969/j.issn.1673-9736.2020.01.03
基金项目:

Supported by Project of the National Natural Science Foundation of China (No. 41974135).

通讯作者: SUN Jianguo
作者简介:
作者Email: sun_jg@jlu.edu.cn
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