Elastic wave full-waveform inversion in the time domain by the trust region method
文献类型：期刊论文
| 作者 | Zhang, Wensheng1,2; Li, Yijun1,2 |
| 刊名 | JOURNAL OF APPLIED GEOPHYSICS
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 197页码:16 |
| 关键词 | Elastic wave equations Full-waveform inversion Media coefficients Trust region method L-BFGS |
| ISSN号 | 0926-9851 |
| DOI | 10.1016/j.jappgeo.2022.104540 |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000788103400002 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.amss.ac.cn/handle/2S8OKBNM/60357]  |
| 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.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Acad Math & Syst Sci, LSEC, ICMSEC, Beijing 100190, 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. |
入库方式： OAI收割
来源：数学与系统科学研究院
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