<p>Elastic wave full-waveform inversion in the time domain by the trust region method</p>

doi:10.1016/j.jappgeo.2022.104540

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	Elastic wave full-waveform inversion in the time domain by the trust region method
	Zhang, Wensheng 1,2; Li, Yijun 1,2
	2022-02-01
发表期刊	JOURNAL OF APPLIED GEOPHYSICS
ISSN	0926-9851
卷号	197 页码:16
摘要	In this paper, we investigate the elastic wave full-waveform inversion (FWI) by the trust region method. FWI is an optimization problem of minimizing the misfit between the observed data and simulated data. Usually the gradient-based search methods such as the steepest descent method or quasi-Newton's methods are applied to update the model parameters iteratively. And the L-BFGS method with approximated Hessian information is preferred for its high computational efficiency and accuracy. At each iteration, a line search method computes a search direction and then finds a suitable step length or how far to move along the direction. The trust region method is an effective alternative to solve nonlinear optimization problems. In this paper, we investigate the performance of the trust region method in elastic time-domain FWI. In the trust region method, a trial step length called the trust-region radius is forced within a certain neighborhood of the current iterate point and a trust-region subproblem requires to solve. In order to solve the trust-region subproblem, the dogleg method and the two dimensional subspace method are adopted in this paper. In the trust region method, as long as the trust region radius is well updated, the model updating can be performed for every iteration with the fixed trial step and there is no more extra computation for forward problem like the line search method. Numerical computations for the benchmark Marmousi model are given. The inversion results and comparisons show that the trust region method is very efficient and behaves better than the line search method such as the well-known L-BFGS method.
关键词	Elastic wave equations Full-waveform inversion Media coefficients Trust region method L-BFGS
DOI	10.1016/j.jappgeo.2022.104540
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[1 1 471328] ; Key Project National Natural Science Foundation of China[51739007]
WOS研究方向	Geology ; Mining & Mineral Processing
WOS类目	Geosciences, Multidisciplinary ; Mining & Mineral Processing
WOS记录号	WOS:000788103400002
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/60358
专题	中国科学院数学与系统科学研究院
通讯作者	Zhang, Wensheng
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, LSEC, ICMSEC, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Wensheng,Li, Yijun. Elastic wave full-waveform inversion in the time domain by the trust region method [J]. JOURNAL OF APPLIED GEOPHYSICS,2022,197:16.
APA	Zhang, Wensheng,&Li, Yijun.(2022). Elastic wave full-waveform inversion in the time domain by the trust region method .JOURNAL OF APPLIED GEOPHYSICS,197,16.
MLA	Zhang, Wensheng,et al." Elastic wave full-waveform inversion in the time domain by the trust region method ".JOURNAL OF APPLIED GEOPHYSICS 197(2022):16.