A fast two-point gradient algorithm based on sequential subspace optimization method for nonlinear ill-posed problems
A fast two-point gradient algorithm based on sequential subspace optimization method for nonlinear ill-posed problems
复制标题
非线性不适定问题的基于序贯子空间优化方法的快速两点梯度算法
DOI:
10.1016/j.matcom.2021.09.004
复制
发表时间:
2019-11
影响因子:
4.6
通讯作者:
Shanshan Tong
中科院分区:
文献类型:
--
作者:
Guangyu Gao;Bo Han;Shanshan Tong
In this paper, we propose a fast two-point gradient algorithm for solving nonlinear ill-posed problems, which is based on the sequential subspace optimization method. The key idea, in contrast to the standard two-point gradient method, is to use multiple search directions in each iteration without extra computation, and to get the step size by metric projection. Moreover, a modified discrete backtracking search algorithm is proposed to select the combination parameters in the accelerated two-point gradient method. Under the basic assumptions for iterative regularization methods, we establish the convergence results of the method in the noise-free case. Furthermore, stability and regularity are presented when the algorithm terminated by the discrepancy principle for the case of noisy data. Finally, some numerical simulations are presented, which exhibit that the proposed method leads to a significant reduction of the iteration numbers and the overall computational time.
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影响因子:
2.1
作者:
F. Sch;Thomas Schuster
通讯作者:
F. Sch;Thomas Schuster
DOI:
10.22028/d291-26778
发表时间:
2017
期刊:
--
影响因子:
--
作者:
Anne Wald
通讯作者:
Anne Wald
DOI:
--
发表时间:
2018-12
期刊:
arXiv: Numerical Analysis
影响因子:
--
作者:
M. Zhong;Wei Wang;Q. Jin
通讯作者:
M. Zhong;Wei Wang;Q. Jin
影响因子:
2.1
作者:
Shanshan Tong;Bo Han;Haie Long;Ruixue Gu
通讯作者:
Ruixue Gu
影响因子:
2.1
作者:
Q. Jin
通讯作者:
Q. Jin