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- Title
压缩感知中 l<sub>1</sub> 问题的自适应罚参数交替方向法.
- Authors
徐 丽 君; 胡 瑞 戈; 李 婷
- Abstract
In order to deal with the choice of penalty parameter in the alternative direction method, an adaptively up dating rule for penalty parameter is proposed specially for l1 - problem in compressed sensing. The rule is based on the relative change of the objective value and constraints during iterations. By studying the condition, frequency and quantity of updating penalty parameter in detail, a dynamic scheme to adjust the penalty parameter is developed for the dual problem. Numerical experiments show that the proposed adaptively updating rule enlarges the choice of initial penalty parameter which improves the applicability. In addition, since the penalty parameter is dynamically adjusted during iterations, it can speed up the operation and achieve good performance for the alternative direction method.
- Publication
Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao, 2022, Vol 62, Issue 1, p95
- ISSN
1000-8608
- Publication type
Academic Journal
- DOI
10.7511/dllgxb202201012