TY - JOUR T1 - A Fractional Tikhonov Regularisation Method for Finding Source Terms in a Time-Fractional Radial Heat Equation JO - East Asian Journal on Applied Mathematics VL - 2 SP - 386 EP - 408 PY - 2019 DA - 2019/03 SN - 9 DO - http://doi.org/10.4208/eajam.090918.030119 UR - https://global-sci.org/intro/article_detail/eajam/13089.html KW - Inverse source problem, fractional Tikhonov regularisation method, error estimate. AB -

The ill-posed problems of the identification of unknown source terms in a time-fractional radial heat conduction problem are studied. To overcome the difficulties caused by the ill-posedness, a fractional Tikhonov regularisation method is proposed. Employing Mittag-Leffler function, we obtain error estimates under a priori and a posteriori regularisation parameter choices. In the last situation, the Morozov discrepancy principle is also used. Numerical examples show that the method is a stable and effective tool in the reconstruction of smooth and non-smooth source terms and, generally, outperforms the classical Tikhonov regularisation.