A backward problem for the time-fractional diffusion equation
A backward problem for the time-fractional diffusion equation
复制标题
时间分数扩散方程的后向问题
DOI:
10.1080/00036810903479731
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发表时间:
2010-09
影响因子:
1.1
通讯作者:
J.J.Liu
中科院分区:
文献类型:
--
作者:
M.Yamamoto;J.J.Liu
We consider a backward problem in time for a time-fractional partial differential equation in one-dimensional case, which describes the diffusion process in porous media related with the continuous time random walk problem. Such a backward problem is of practically great importance because we often do not know the initial density of substance, but we can observe the density at a positive moment. The backward problem is ill-posed and we propose a regularizing scheme by the quasi-reversibility with fully theoretical analysis and test its numerical performance. With the help of the memory effect of the fractional derivative, it is found that the property of the initial status of the medium can be recovered in an efficient way. Since our solution is established on the eigenfunction expansion of elliptic operator, the method proposed in this article can be used to higher dimensional case with variable coefficients.
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DOI:
10.1142/9789812704924_0012
发表时间:
2003-04
期刊:
--
影响因子:
--
作者:
Jijun Liu
通讯作者:
Jijun Liu
DOI:
10.1017/cbo9781139086967.004
发表时间:
1984
期刊:
--
影响因子:
--
作者:
J. Cannon;F. Browder
通讯作者:
J. Cannon;F. Browder
DOI:
--
发表时间:
2008
期刊:
--
影响因子:
--
作者:
坂本 健一
通讯作者:
坂本 健一
DOI:
--
发表时间:
2006
期刊:
--
影响因子:
--
作者:
Duc Trong Dang;Huy Tuan Nguyen
通讯作者:
Duc Trong Dang;Huy Tuan Nguyen
DOI:
--
发表时间:
1968-08
期刊:
--
影响因子:
--
作者:
D. Luckinbill;S. B. Childs
通讯作者:
D. Luckinbill;S. B. Childs