Fundamental kernel-based method for backward space-time fractional diffusion problem
Fundamental kernel-based method for backward space-time fractional diffusion problem
复制标题
后向时空分数扩散问题的基本核方法
DOI:
10.1016/j.camwa.2015.11.023
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发表时间:
2016
影响因子:
2.9
通讯作者:
Hon Y. C.
中科院分区:
文献类型:
--
作者:
Dou Fangfang;Hon Y. C.
Based on kernel-based approximation technique, we devise in this paper an efficient and accurate numerical scheme for solving a backward space–time fractional diffusion problem (BSTFDP). The kernels used in the approximation are the fundamental solutions of the space–time fractional diffusion equation expressed in terms of inverse Fourier transform of Mittag-Leffler functions. The use of Inverse fast Fourier transform (IFFT) technique enables an accurate and efficient evaluation of the fundamental solutions and gives a robust numerical algorithm for the solution of the BSTFDP. Since the BSTFDP is intrinsic ill-posed, we apply the standard Tikhonov regularization technique to obtain a stable solution to the highly ill-conditioned resultant system of linear equations. For choosing optimal regularization parameter, we combine the regularization technique with the generalized cross validation (GCV) method for an optimal placement of the source points in the use of fundamental solutions. Meanwhile, the proposed algorithm also speeds up the previous method given in Dou and Hon (2014). Several numerical examples are constructed to verify the accuracy and efficiency of the proposed method.
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影响因子:
1.3
作者:
N. S. Mera *
通讯作者:
N. S. Mera *
影响因子:
3.7
作者:
X. Li;Chuanju Xu;许传炬
通讯作者:
X. Li;Chuanju Xu;许传炬
DOI:
10.1098/rspa.2001.0893
发表时间:
2002-02
期刊:
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
A. Hanyga
通讯作者:
A. Hanyga
影响因子:
10.2
作者:
HANSEN, PC
通讯作者:
HANSEN, PC
影响因子:
3.3
作者:
Hon, YC;Wei, T
通讯作者:
Wei, T