拟共轭梯度法

本文提出了求解多维无约束非线性最优化问题的有效方法——拟共轭梯度法,推导了拟共轭梯度法的计算公式、迭代方法和收敛判据。拟共轭梯度法不仅适用于目标函数有解析表达式的优化问题,而且也适用于难以求取目标函数的梯度和目标函数只有数值解的那些优化问题,因而具有广泛的使用领域。

Quasi-Conjugate-Gradient Method

This paper presents a efficient method for solving the unconstrained multivariat nonlinear optimization problems--the quasi-Conjugate-Gradient method.Derivations about the computation formula,iterative method and convergence criterion vere made.The propused method is not noly fit for solving the optimization problems which having analytical solutions,but also for those whose gradients are not easy to work out or whose objective function have only numerical solutions.Therefore,it can be used for many purposes.