Abstract
This paper is devoted to solve an inverse problem for identifying the source term of a time-fractional nonhomogeneous diffusion equation with a fractional Laplacian in a non-local boundary. Based on the expression of the solution for the direct problem, the inverse problem for searching the space source term is converted into solving the first kind of Fredholm integral equation. The conditional stability for the inverse source problem is investigated. The fractional Landweber method is used to deal with this inverse problem and the regularized solution is also obtained. Furthermore, the convergence rates for the regularized solution can be proved by using an a priori regularization parameter choice rule and an a posteriori parameter choice rule. Several numerical examples are given to show the proposed method is efficient and stable.
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The project is supported by the National Natural Science Foundation of China (No.11961044), the Doctor Fund of Lan Zhou University of Technology.
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The main idea of the article is given by Fan Yang and Qu Pu. We confirmed the steps of the article. This view is shared by all the authors.
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Yang, F., Pu, Q. & Li, XX. The fractional Landweber method for identifying the space source term problem for time-space fractional diffusion equation. Numer Algor 87, 1229–1255 (2021). https://doi.org/10.1007/s11075-020-01006-4
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DOI: https://doi.org/10.1007/s11075-020-01006-4
Keywords
- Time-fractional diffusion equation
- Fractional Laplacian
- Identifying the unknown source
- Fractional Landweber regularization
- Ill-posed problem