A NLCG Inversion Method of Magnetotellurics with Parallel Structure
详细信息
- 责任者：Zhang Kun (Key Laboratory of Metallogeny and Mineral Assessment ; MLR ; Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Dong Hao
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(11)
- 关键词：大地电磁测深 ; telluric electromagnetic sounding ; 共轭梯度法 ; conjugate gradient methods ; 反演问题 ; inverse problem
- 页码：p.3922-3931
- 图表：8 illus., 14 refs.
- 分类号：1600
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In this paper, we improve and verify the inversion algorithm and parallel computing program of three-dimensional magnetotelluric sounding, and the program does not require much physical memory and CPU quantity. It makes possible to do three-dimensional inversion with ordinary PC computers. Based on the nonlinear conjugate gradient algorithm proposed by Newman and Alumbaugh （2000） and preconditioning method proposed by Rodi and Mackie （2001）, we improve the preconditioning method, and verify the program with theoretical models. According to the inversion results of measured data in Japanese KAYABE area, we demonstrate the practicality of the algorithm.