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首页> 外文期刊>Journal of Computational and Applied Mathematics >Iterative thresholding algorithm based on non-convex method for modified l(p)-norm regularization minimization
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Iterative thresholding algorithm based on non-convex method for modified l(p)-norm regularization minimization

机译:基于非凸法法的迭代阈值算法 - 用于修改L(P) - 诺正则化最小化

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摘要

Recently, the l(p)-norm regularization minimization problem (P-p(lambda)) has attracted great attention in compressed sensing. However, the l(p)-norm parallel to x parallel to(p)(p) in problem (P-p(lambda)) is nonconvex and non-Lipschitz for all p is an element of (0, 1), and there are not many optimization theories and methods proposed to solve this problem. In fact, it is NP-hard for all p is an element of (0, 1) and lambda 0. In this paper, we study one modified 1 p -norm regularization minimization problem to approximate the NP-hard problem (P-p(lambda)). Inspired by the good performance of Half algorithm in some sparse signal recovery problems, an iterative thresholding algorithm is proposed to solve our modified l(p)-norm regularization minimization problem (P-P,1/2 epsilon(lambda))d Numerical results on some sparse signal recovery problems show that our algorithm performs effectively in finding the sparse signals compared with some state-of-art methods. (C) 2018 Elsevier B.V. All rights reserved.
机译:最近,L(P) - 常规规则化最小化问题(P-P(Lambda))引起了压缩传感的极大关注。然而,L(p)-norm与问题(pp(lambda))平行于(p)(p)的x平行(pp(lambda))是非凸且所有p的非嘴唇,是(0,1)的元素,并且存在没有许多优化理论和方法建议解决这个问题。实际上,对于所有P是NP - 难以(0,1)和Lambda&gt的元素;在本文中,我们研究了一个修改的1 p-or常规规则化最小化问题以近似NP-coll问题(p-p(lambda))。通过在一些稀疏信号恢复问题中的半算法的良好性能的启发,提出了一种迭代阈值算法来解决我们修改的L(P) - 诺正则化最小化问题(PP,1/2 epsilon(Lambda))D数值结果稀疏的信号恢复问题表明,与某些最先进的方法相比,我们的算法在找到稀疏信号时执行。 (c)2018年elestvier b.v.保留所有权利。

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