作者
Olga Krivorotko, Sergey Kabanikhin, Shuhua Zhang, Victoriya Kashtanova
发表日期
2020/12/1
期刊
Journal of Inverse and Ill-posed Problems
卷号
28
期号
6
页码范围
899-913
简介
The problem of identification of coefficients and initial conditions for a boundary value problem for parabolic equations that reduces to a minimization problem of a misfit function is investigated. Firstly, the tensor train decomposition approach is presented as a global convergence algorithm. The idea of the proposed method is to extract the tensor structure of the optimized functional and use it for multidimensional optimization problems. Secondly, for the refinement of the unknown parameters, three local optimization approaches are implemented and compared: Nelder–Mead simplex method, gradient method of minimum errors, adaptive gradient method. For gradient methods, the evident formula for the continuous gradient of the misfit function is obtained. The identification problem for the diffusive logistic mathematical model which can be applied to social sciences (online social networks), economy (spatial Solow …
学术搜索中的文章
O Krivorotko, S Kabanikhin, S Zhang, V Kashtanova - Journal of Inverse and Ill-posed Problems, 2020