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A Modified Newton Method Based on the Metric Projector for Solving SOCCVI Problem
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作者 Hao Liu Juhe Sun Li Wang 《Journal of Applied Mathematics and Physics》 2022年第4期1036-1054,共19页
In this paper, based on the second-order sufficient condition, the Clarke's generalized Jacobian of the Karush-Kuhn-Tucker system of the second-order cone constrained variational inequality (SOCCVI) problem that i... In this paper, based on the second-order sufficient condition, the Clarke's generalized Jacobian of the Karush-Kuhn-Tucker system of the second-order cone constrained variational inequality (SOCCVI) problem that is nonsingular is proved by us. A modified Newton method with Armijo line search is presented. Three illustrative examples are given to show how the modified Newton method works. 展开更多
关键词 Second-Order Cone Variational Inequality metric projector Second-Order Sufficient Condition
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Approximative compactness and continuity of metric projector in Banach spaces and applications 被引量:5
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作者 HUDZIK Henryk KOWALEWSKI Wojciech WISLA Marek 《Science China Mathematics》 SCIE 2008年第2期293-303,共11页
First we prove that the approximative compactness of a nonempty set C in a normed linear space can be reformulated equivalently in another way.It is known that if C is a semi-Chebyshev closed and approximately compact... First we prove that the approximative compactness of a nonempty set C in a normed linear space can be reformulated equivalently in another way.It is known that if C is a semi-Chebyshev closed and approximately compact set in a Banach space X,then the metric projectorπC from X onto C is continuous.Under the assumption that X is midpoint locally uniformly rotund,we prove that the approximative compactness of C is also necessary for the continuity of the projectorπC by the method of geometry of Banach spaces.Using this general result we find some necessary and sufficient conditions for T to have a continuous Moore-Penrose metric generalized inverse T^+,where T is a bounded linear operator from an approximative compact and a rotund Banach space X into a midpoint locally uniformly rotund Banach space Y. 展开更多
关键词 approximative compactness CONTINUITY metric projector midpoint locally uniformly rotundity 46B20
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Nonsingularity in second-order cone programming via the smoothing metric projector 被引量:1
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作者 WANG Yun ZHANG LiWei 《Science China Mathematics》 SCIE 2010年第4期1025-1038,共14页
Based on the differential properties of the smoothing metric projector onto the second-order cone,we prove that,for a locally optimal solution to a nonlinear second-order cone programming problem,the nonsingularity of... Based on the differential properties of the smoothing metric projector onto the second-order cone,we prove that,for a locally optimal solution to a nonlinear second-order cone programming problem,the nonsingularity of the Clarke's generalized Jacobian of the smoothing Karush-Kuhn-Tucker system,constructed by the smoothing metric projector,is equivalent to the strong second-order sufficient condition and constraint nondegeneracy,which is in turn equivalent to the strong regularity of the Karush-Kuhn-Tucker point.Moreover,this nonsingularity property guarantees the quadratic convergence of the corresponding smoothing Newton method for solving a Karush-Kuhn-Tucker point.Interestingly,the analysis does not need the strict complementarity condition. 展开更多
关键词 second-order cone programming problem smoothing metric projector B-subdifferential Clarke’s generalized Jacobian smoothing Newton method
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随机变量投影的若干重要性质
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作者 张红伟 《哈尔滨师范大学自然科学学报》 CAS 2006年第4期8-10,共3页
研究随机变量投影的若干重要性质,对研究随机变量投影PC本身及其单值选择πc的性质有着十分重要的意义.
关键词 随机线性算子 随机变量投影 单值选择
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近可凹性和Banach空间的逼近紧性及度量投影算子的连续性 被引量:4
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作者 商绍强 崔云安 付永强 《中国科学:数学》 CSCD 北大核心 2011年第9期815-825,共11页
本文定义了近可凹的Banach空间.利用Banach空间几何技巧证得:X是逼近紧的当且仅当(1)X是近可凹的;(2)X是近严格凸的.还证明了如果Banach空间X是近可凹的,则对任意闭凸集C,度量投影算子PC是上半连续的.最后作者给出了近可凹性在广义逆理... 本文定义了近可凹的Banach空间.利用Banach空间几何技巧证得:X是逼近紧的当且仅当(1)X是近可凹的;(2)X是近严格凸的.还证明了如果Banach空间X是近可凹的,则对任意闭凸集C,度量投影算子PC是上半连续的.最后作者给出了近可凹性在广义逆理论中的应用. 展开更多
关键词 近可凹性 逼近紧性 度量投影算子 上半连续 近严格凸性
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Banach空间中拟线性投影算子 被引量:3
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作者 栾丛海 王玉文 《数学的实践与认识》 CSCD 北大核心 2004年第6期166-171,共6页
证明了 :在自反 Banach空间$X$中 ,每个闭子空间 L,都存在 X到 L上的拟线性投影算子 SL.一般说来 ,SL 既非度量投影算子 ,又非线性算子 .
关键词 BANACH空间 自反性 拟线性投影算子 度量投影算子
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有限元模型修正问题的不精确最速下降迭代解
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作者 叶明 《应用数学学报》 CSCD 北大核心 2009年第5期894-902,共9页
在结构动力分析中,往往需利用结构振动测试所得的实际测量数据(如振动频率和振型),对结构分析模型进行最优修正,使之更能合理反映结构的实际性能,其实质即为计算数学中的特征值反问题.本文考虑有阻尼结构振动中的一类反问题,用一组不完... 在结构动力分析中,往往需利用结构振动测试所得的实际测量数据(如振动频率和振型),对结构分析模型进行最优修正,使之更能合理反映结构的实际性能,其实质即为计算数学中的特征值反问题.本文考虑有阻尼结构振动中的一类反问题,用一组不完备的模态测量数据修正系统质量矩阵、刚度矩阵和阻尼矩阵,通过等价正交投影思想将原问题转化成一个闭凸锥上的正交投影问题,构造一个不精确最速下降迭代法求解,并讨论了收敛性.算例表明算法是有效的. 展开更多
关键词 有限元模型 模型修正 特征值反问题 结构动力分析 最速下降法
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