地震学报（英文版）2009，Vol.22Issue(1)：45-52,8.DOI:10.1007/s11589-009-0045-y
Visco-acoustic transmission waveform inversion of velocity structure in space-frequency domain
Visco-acoustic transmission waveform inversion of velocity structure in space-frequency domain
Guihua Long 1Xiaofan Li 2Meigen Zhang 1Tong Zhu1
作者信息
- 1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
- 2. Graduate University of Chinese Academy of Sciences, Belting 100049, China
- 折叠
摘要
Abstract
According to the least square criterion of minimizing the misfit between modeled and observed data, this paper provides a preconditioned gradient method to invert the visco-acoustic velocity structure on the basis of using sparse matrix LU factorization technique to directly solve the visco-acoustic wave forward problem in space-frequency domain. Numerical results obtained in an inclusion model inversion and a layered homogeneous model inversion demonstrate that different scale media have their own frequency responses, and the strategy of using low-frequency inverted result as the starting model in the high-frequency inversion can greatly reduce the non-uniqueness of their solutions. It can also be observed in the experi-ments that the fast convergence of the algorithm can be achieved by using diagonal elements of Hessian matrix as the pre-conditioned operator, which fully incorporates the advantage of quadratic convergence of Gauss-Newton method.关键词
vista-acoustic/waveform inversion/LU factorization/preconditioned operatorKey words
vista-acoustic/waveform inversion/LU factorization/preconditioned operator分类
天文与地球科学引用本文复制引用
Guihua Long,Xiaofan Li,Meigen Zhang,Tong Zhu..Visco-acoustic transmission waveform inversion of velocity structure in space-frequency domain[J].地震学报（英文版）,2009,22(1):45-52,8.
