| | | | | 解无约束最优化问题的一个非单调BFGS信赖域算法 | | | 吴庆军 | | | 在文[19]的基础上,给出了一个解无约束最优化问题的非单调BFGS校正的信赖域算法.此算法具有较好的性质,所给的BFGS校正的具有二次约束的信赖域子问题总保证是严格凸二次规划.在适当的条件下此算法具有全局收敛性和Q 二次收敛性. 【作者单位】:广西玉林师范学院数学与计算机科学系 广西玉林 537000 【关键词】:BFGS方法;非单调;信赖域方法;全局收敛性;无约束最优化 【分类号】:O224 【DOI】:cnki:ISSN:1007-0311.0.2004-01-015 【正文快照】: 0 引言对于无约束最优化问题minf(x),x∈Rn(1)其中f(x)是连续可微函数,众所周知BFGS方法是拟牛顿方法中解无约束最优化问题的重要的方法之一[9,10,11],文献[12,13,14,17,18]也给出了一些修改的BFGS方法并分析了其收敛性.我们都知道重要的BFGS校正公式Bk+1=Bk+ykyTkSTkyk-Bksks | | | 推荐 CAJ下载 PDF下载 | | | CAJViewer7.0阅读器支持所有CNKI文件格式,AdobeReader仅支持PDF格式 | | | | A Nonmonotone BFGS-TRUST-REGION Algorithm for Unconstrained Optimization Problems | | | WU Qing-jun (Dept. of Mathematics and Computer Science;Yulin Normal College;Yulin 537000;China ) | | | In this paper,we propose a nonmonotone BFCS-trust-region algorithm which based on [19]for unconstained optimization.The advantage of this algorithm is that the subproblem of tust-region method is always a strictly convex quadratic programming. We prove the algorithm possesses global and Q-quadratic convergence under suitable conditions. 【Keyword】:BFGS method;nonmonotone;trust region method;global convergence;unconstrained optimization |
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