【摘要】 本文详细介绍了约束非线性规划中的一种融合了约束变尺度方法和极大熵方法、具有显式搜索方向的变尺度算法———Q算法。这类算法对于具有先验知识的非线性参数估计问题非常有效。在成层地基位移反分析问题的数值计算研究中 ,采用了Q算法 ,克服了通常的算法对初值依赖性强、在工程计算过程中出现数据不稳定甚至不收敛的缺陷。更多还原

【Abstract】 In the research of numerical calculation of displacement anti analysis,we successfully adapt Q algorithms to overcome the problems of slow convergence and local minimization.Q algorithmsis a Metric Method with open formula of searching direction.It combines the advantages of constrains Metric Method and Maximum Entropy Method,suit for the onstrained or non constrained problems.It is very efficient in the numerical examples.We introduce the Q algorithms and give two examples to show the effect in the numerical calculation of displacement anti analysis.更多还原