Details of the Abstract
| Title of paper | Approximate Jacobi matrix in 3D Airborne Transient Electromagnetic inversion |
| List of authors | Author, Hao Ren., Co-author, Da Lei. |
| Affiliation(s) |
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, renhao201@mails.ucas.ac.cn; CAS Engineering Laboratory for Deep Resources Equipment and Technology, Institute of Geology and Geophysics, Chinese Academy of Sciences, leida@mail.iggcas.ac.cn. |
| Summary | In geophysical inverse problems, the computation of the Jacobi matrix is a time-consuming process that significantly limits the computational speed of the inversion. To expedite the 3D inversion process, we propose an approximation of the Jacobi matrix to speed up the computation. We utilized the approximate gradient derived from the approximate Jacobi matrix for inversion computation during each iteration, and simultaneously used an accurate forward modeling method when evaluating the quality of inversion model, so that an inversion model that satisfies the data fitting criteria could be obtained after many iterations. This approximate Jacobi matrix inversion method is applied to the 3D Airborne Transient Electromagnetic inversion of synthetic data, resulting in a significant reduction in the time required for inversion while maintaining accuracy. This technique is notably faster than traditional inversion methods that calculate the Jacobi matrix exactly, particularly when dealing with numerous model grids. |
| Session Keyword | 2.0 EM theory, modelling and Inversion |
| File upload |
2.0_approximate_jacobi_matrix_ren.pdf
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