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Numerical reconstruction of the spatial component in the source term of a time-fractional diffusion equation
| Title: | Numerical reconstruction of the spatial component in the source term of a time-fractional diffusion equation |
| Authors: | Jiang, Daijun Browse this author | | Liu, Yikan Browse this author →KAKEN DB | | Wang, Dongling Browse this author |
| Keywords: | Time-fractional diffusion equation | | Inverse source problem | | Finite element method | | Iterative thresholding algorithm |
| Issue Date: | 4-May-2020 |
| Publisher: | Springer |
| Journal Title: | Advances in Computational Mathematics |
| Volume: | 46 |
| Issue: | 3 |
| Start Page: | 43 |
| Publisher DOI: | 10.1007/s10444-020-09754-6 |
| Abstract: | In this article, we are concerned with the analysis on the numerical reconstruction of the spatial component in the source term of a time-fractional diffusion equation. This ill-posed problem is solved through a stabilized nonlinear minimization system by an appropriately selected Tikhonov regularization. The existence and the stability of the optimization system are demonstrated. The nonlinear optimization problem is approximated by a fully discrete scheme, whose convergence is established under a novel result verified in this study that the H-1-norm of the solution to the discrete forward system is uniformly bounded. The iterative thresholding algorithm is proposed to solve the discrete minimization, and several numerical experiments are presented to show the efficiency and the accuracy of the algorithm. |
| Publisher URI: | https://arxiv.org/abs/1812.04235 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/78716 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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