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实值函数近似鞍点集的连续性
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作者 王衍程 王梅 +1 位作者 刘雷 李小兵 《湖北民族大学学报(自然科学版)》 CAS 2021年第1期33-38,共6页
鞍点问题是最优化问题中的一个重要研究课题.首先,在赋范线性空间中对实值函数鞍点问题与含参实值函数鞍点问题进行了新的刻画,并提出了含参近似鞍点集与辅助含参近似鞍点集的概念.其次,研究了在考虑点附近鞍点集关于扰动参数变化时的性... 鞍点问题是最优化问题中的一个重要研究课题.首先,在赋范线性空间中对实值函数鞍点问题与含参实值函数鞍点问题进行了新的刻画,并提出了含参近似鞍点集与辅助含参近似鞍点集的概念.其次,研究了在考虑点附近鞍点集关于扰动参数变化时的性质,得到了鞍点集的包含关系.然后证明了当扰动的可行集上半连续并且有紧值时,含参近似鞍点集是紧集.最后,利用凹-凸函数的性质,在一定条件下研究了含参近似鞍点集的Hausdorff连续性. 展开更多
关键词 鞍点问题 Hausdorff连续 Berge连续 凹-凸函数
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CONVEXIFICATION AND CONCAVIFICATION METHODS FOR SOME GLOBAL OPTIMIZATION PROBLEMS 被引量:3
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作者 WUZhiyou ZHANGLiansheng +1 位作者 BAIFusheng YANGXinmin 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2004年第3期421-436,共16页
In this paper, firstly, we propose several convexification and concavification transformations to convert a strictly monotone function into a convex or concave function, then we propose several convexification and con... In this paper, firstly, we propose several convexification and concavification transformations to convert a strictly monotone function into a convex or concave function, then we propose several convexification and concavification transformations to convert a non-convex and non-concave objective function into a convex or concave function in the programming problems with convex or concave constraint functions, and propose several convexification and concavification transformations to convert a non-monotone objective function into a convex or concave function in some programming problems with strictly monotone constraint functions. Finally, we prove that the original programming problem can be converted into an equivalent concave minimization problem, or reverse convex programming problem or canonical D.C. programming problem. Then the global optimal solution of the original problem can be obtained by solving the converted concave minimization problem, or reverse convex programming problem or canonical D.C. programming problem using the existing algorithms about them. 展开更多
关键词 Global optimal solution concave minimization reverse convex programmingproblem D.C. programming problem CONVEXIFICATION CONCAVIFICATION
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