Details of the Abstract
| Title of paper | Block coordinate descent 3D inversion method for AEM data interpretation |
| List of authors | Bo Zhang., Changchun Yin., Kelin Qu., Yinfeng Wang., Luyuan Wang., Yunhe Liu., Xiuyan Ren.,Yang Su |
| Affiliation(s) |
College of Geoexploration Science and Technology, Jilin University, Changchun, China., College of Geoexploration Science and Technology, Jilin University, Changchun, China., College of Geoexploration Science and Technology, Jilin University, Changchun, China., College of Geoexploration Science and Technology, Jilin University, Changchun, China., College of Geoexploration Science and Technology, Jilin University, Changchun, China., College of Geoexploration Science and Technology, Jilin University, Changchun, China., College of Geoexploration Science and Technology, Jilin University, Changchun, China., College of Geoexploration Science and Technology, Jilin University, Changchun, China. |
| Summary | The airborne electromagnetic (AEM) method usually has large datasets, and the high demand for computing resources limits the application of three-dimensional (3D) AEM inversions. In the process of 3D AEM inversion, the step that consumes most computing resources is the solution of the large matrix equations. To avoid this disadvantage, the local mesh inversion method has been proposed, which significantly reduces the computational cost of 3D inversion. However, when the AEM survey area is very large, a large-scale inversion matrix equation will be generated during the inversion. Solving this large-scale matrix equations and storing the sensitivity matrix of all data points will consume a lot of memory. To solve this problem, we develop a 3D AEM data inversion method based on block coordinate descent technique (BCD). This method divides the large-scale inversion problem into many small inversion problems, avoiding the waste of computational resources in solving large equation systems. The experimental results indicate that the BCD method can obtain inverse models that are very similar to traditional inversions, but the memory cost is only one-third of the conventional 3D AEM inversion. |
| Session Keyword | 2.0 EM theory, modelling and Inversion |
| File upload |
2.0_block_coordinate_descent_zhang_02.pdf
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