查询词典 iteration method

During the initial partitioning phase of multilevel method, this paper proposed the algorithm of spectral partitioning for weighted undirected graph and gave the Fiedler vector calculation of Laplacian matrix using the Lanczos iteration method.

在多水平方法初始剖分阶段提出了一种基于谱方法的无向赋权图剖分算法SPWUG，给出了基于Lanczos迭代计算Laplacian矩阵次小特征值及特征向量的实现细节。

Based on the prior information obtained by qualitative inversion, the two stages inversion method was put forward. That is, the first stage is that distinguishing the high-quality element and non- high-quality element, and determining the initial iteration value of element sound velocity reasonably. The second stage is that treating differentially the constraint weights of the high-quality element and non- high-quality element, and then quantitatively inversing the final sound velocity distribution. The results of two concrete specimens indicate that the two stages inversion method can inhibit artifacts effectively and has better defect identification effect than normal one stage inversion.

在获取定性反演先验信息的基础上，提出了两阶段反演的方法：第一阶段，区分优质像元和非优质像元，合理确定像元声速的迭代初值；第二阶段，区别对待优质像元和非优质像元的约束权重，定量反演最终的速度分布。2个混凝土试件的模型试验表明，两阶段反演能有效抑制伪像，具有比常规的一阶段反演更好的缺陷识别效果。

Fixed point iteration method is also a common calculation method of nonlinear equations.

详细说明：不动点迭代方法也是一常用的计算非线性方程组的解法。

By For the Jacobi iterative method of Gauss - Seidel iterative method and the comparison Initial research iterative equation and the nature of the coefficient matrix iteration convergence speed impact.

本文通过了举例对Jacobi迭代法和Gauss-Seidel迭代法进行了比较，研究迭代初值和方程组系数矩阵性质对迭代法收敛速度的影响。

In the computation of aerodynamic forces, the present work is based on the work of Morino et al., but the following aspects are improved:(1) In computing the steady transonic aerodynamic load, the steady transonic nonlinear integral equation is solved by relaxation-iteration method in this thesis, instead of solving the time dependent transonic nonlinear integral equation, so that the computing time is saved greatly;(2) The influence coeifficients represented by volume integral are transformed to surface integral by using the Gaussian Theorem, so the analytical form of these coeifficients can be obtained and this leads to be more convenient to analyse and compile computer program;(3) The shock capturing method is used in every time step in present work, no shock moving term is added in the integral equation, so that it is more convenient and simpler to treat.

在气动力计算方面，本文基于Morino等人的工作，作了如下几方面的改进：（1）在计算定常跨音速流场（作为非定常绕流计算的初场）时，本文采用松驰迭代法直接求解跨音速定常非线性积分方程，而不是采用时间相关法求解非定常非线性积分方程，这样大大节省了计算机时；（2）将以体积分形式出现的影响系数化为面积分，并获得解析公式，这样便于分析和编写程序；（3）对运动的激波，本文通过在每一个时间步长上采用激波捕捉法而得到，而不是在积分方程中附加激波运动项，因而处理起来简单方便得多。

Inverse problems ; nonlinear ill-posed operator equations ; Newton type method ; implicit iterative method ; iteration stopping rule

反问题；非线性不适定算子方程； Newton型方法；隐式迭代法；迭代终止准则

On the basis of FTA method, BDD analysis was used based on the method of iteration.

文中在FTA方法的基础上，采用基于迭代法的BDD分析。

In this paper, a novel method called the variational iteration method is proposed to solve perturbation problems.

本文提出了求解摄动问题的一种新方法——变分迭代算法。

This paper focuses on convergence analysis of integral iteration method, and proves that the method is convergent mathematically.

本文着重对积分-迭代法的收敛性进行了分析，从数学角度证明积分-迭代法能够收敛到直接下延法理论解。

The new algorithm which combines matrix method with iteration method is presented.

提出一种新算法———迭代法结合矩阵法求解模型并给出算法框图。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。