查询词典 gradient method

A boundary identification problem of two-dimensional unsteady heat conduction was solved by using dual reciprocity boundary element method and conjugate gradient method-based inverse algorithm.

采用基于双倒易边界元法和共轭梯度法的反演算法求解二维非稳态导热边界识别问题。

Parametric evaluation function can condense the complicated multi-objective and multi-constrait problem into a single-objective unconstrained problem, then solved with conjugate gradient method.The parametric evaluation function method decreases the optimization difficulty,and makes the solution away from the boundary of feasible region during the optimization process,which makes all the objectives optimized simultaneously.

参数评价函数把复杂的多目标多约束优化问题转化为单目标无约束问题，然后用共轭梯度法进行求解，不但降低了求解难度，而且使得在优化过程中其解远离可行域的边界，保证了对多目标中所有目标同时进行优化。

Conjugate gradient method is a method for solving nonlinear optimization problems, especially large-scale problems.

共轭梯度法是求解无约束优化问题的一种重要的方法，尤其适用于大规模优化问题的求解。

Conjugate gradient method is a significant method in solving nonlinear optimization problems.

共扼梯度法是求解非线性优化问题的一种重要方法。

And it is solved by using the conjugate gradient method, in which the calculation precision is almost the same as that in the SVD method.

最后通过对模拟数据和实测数据进行反演试算，验证本计算方法是可行的。

In the paper we analyze and realize using MATLAB two inversion techniques (the gradient method and the DFP method), and check the two techniques , too.

本文分析并用MATLAB实现了两种反演算法，并对这两种算法进行了验模，以评定算法的准确性。

Based on DFP gradient method and the theory of elastic visco-plasticity and that of finite element method, the deficiency and objection existing in present stochastic back analysis methods have been deeply studied in this paper in order to provide much more reliable parameter for the mechanical analysis of geological engineering structures.

本文基于变尺度梯度优化方法和弹-粘塑性原理及其有限元基本理论，针对随机反分析方法存在的缺陷和不足进行研究，以期为实际岩土工程结构的力学分析提供更加可靠的材料参数。

The method replaces the grads in gradient method with difference quotient and can be used to many cases.

然后根据此界的特点，提出了基于差商的参数优化算法，用差商代替导数的计算，具有较大的适用范围。

The introduction of line searches requires the solution of sub-problems must be a dropped direction, that is g T k δ k 0, In this paper, we study the existed methods of solving sub-problems, prove Zhang and Xun 1999's dogleg method and Steihaug 1983's conjugate gradient method to meet the condition of adequate decrease, then the solution can be used in line search.

引入线搜索要求子问题的解必须是下降方向，即g T k δ k 0，本文研究了现存的子问题的求解方法，证明了Zhang和Xun1999折线法、Steihaug1983共轭梯度法满足"充分下降条件"，得到的解可以安全实施线搜索。

A new hybrid algorithm that combines the chaos method and the nonlinear conjugate gradient method having an effective convergence property is introduced.

本文针对非线性方程组的求解问题提出一种混合算法，将方程组转换成一个优化问题。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。