共查询到14条相似文献,搜索用时 62 毫秒
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本文研究了不等式约束的非线性规划问题.利用带滤子的无二次子规划(QP-free)非可行域方法,构造一个等价于原约束问题的一阶KKT条件的非光滑方程组,给出解这个方程组的迭代算法,并获得算法的全局收敛性. 相似文献
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姜爱萍 《数学物理学报(A辑)》2011,31(1):103-116
该文提出一种QP-free可行域方法用来解满足光滑不等式约束的最优化问题.此方法把QP-free方法和3-1线性互补函数相结合一个等价于原约束问题的一阶KKT条件的方程组,并在此基础上给出解这个方程组的迭代算法. 这个方法的每一步迭代都可以看作是对求KKT条件解的牛顿或拟牛顿迭代的扰动,且在该方法中每一步的迭代均具有可行性. 该方法是可实行的且具有全局性, 且不需要严格互补条件、聚点的孤立性和积极约束函数梯度的线性独立等假设. 在与文献[2]中相同的适当条件下,此方法还具有超线性收敛性. 数值检验结果表示,该文提出的QP-free可行域方法是切实有效的方法. 相似文献
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本文提出一个解决不等式规划问题的无罚无滤子的修正非单调不可行QP-free算法.在每步迭代,只需要解两个或三个相同系数矩阵来获得搜索方向.我们利用修正的非单调技术松弛了试探点的判别准则,相比其他方法,不要求滤子结构也不涉及罚参数的选取,在一定程度上避免了Maratos效应.在合理的条件下,得到算法的全局收敛性. 相似文献
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A family of NCP functions and a descent method for the nonlinear complementarity problem 总被引:3,自引:0,他引:3
In last decades, there has been much effort on the solution and the analysis of the nonlinear complementarity problem (NCP) by reformulating NCP as an unconstrained minimization involving an NCP function. In this paper, we propose a family of new NCP functions, which include the Fischer-Burmeister function as a special case, based on a p-norm with p being any fixed real number in the interval (1,+∞), and show several favorable properties of the proposed functions. In addition, we also propose a descent algorithm that is indeed derivative-free for solving the unconstrained minimization based on the merit functions from the proposed NCP functions. Numerical results for the test problems from MCPLIB indicate that the descent algorithm has better performance when the parameter p decreases in (1,+∞). This implies that the merit functions associated with p∈(1,2), for example p=1.5, are more effective in numerical computations than the Fischer-Burmeister merit function, which exactly corresponds to p=2. J.-S. Chen is a member of Mathematics Division, National Center for Theoretical Sciences, Taipei Office. J.-S. Chen’s work is partially supported by National Science Council of Taiwan. 相似文献
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本文提出了一个解不等式约束非线性规划问题有效方法.在这个方法中,考虑解一个等价Kuhn-Tucker条件的非线性方程组.这个方程组中NCP函数的使用消去了对应于不等式约束的Lagrange乘子的非负性.截断牛顿方法被用来解这个非线性方程组.为了保证全局收敛性,一个强健的损失函数被选为寻查函数,同时方法中插入修正最速下降方向.本文证明了方法的分Q-二阶收敛性,同时指出新方法可以有效地解稀疏大规模非线性规划问题。 相似文献
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In this paper, we presented a modified QP-free filter method based on a new piecewise linear NCP functions. In contrast with the existing QP-free methods, each iteration in this algorithm only needs to solve systems of linear equations which are derived from the equality part in the KKT first order optimality conditions. Its global convergence and local superlinear convergence are obtained under mild conditions. 相似文献
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在Fischer-Burmeister非线性互补函数的基础上,得到了半无限规划问题的一个新的一阶必要条件,并将半无限规划问题转化成一个光滑的无约束优化问题,给出了适合该问题的一个Damp-Newton算法,数值例子表明:算法结构简单,数值计算有效. 相似文献