数值方程

First, under general conditions, we solvethe locomotive's cyclic working current equation with the analyticaland the numerical methods combined, giving a computing module quitefitting in with practicl results.

文中首先在一般条件下用解析法和数值方法综合求解了SSI型电力机车的周期工作电流方程，给出了比较切合实际的计算模型。

In this paper, the propagation of electron cyclotron waves in plasmas is studied by numerically resolving the ray equations.

通过数值求解波迹方程研究了电子回旋波在等离子体中的传播。

The dynamic equations were derived for the vehicle-bridge coupled system with an axial force of bridge based on D Alembert's principle and the assumed mode method. The numerical results were obtained by Newmark-β method. Dynamic responses of the system caused by axial forces of bridge and speed of vehicle were discussed respectively.

应用达朗贝尔原理和振型分解法，建立了在桥梁轴向力作用下车-桥系统的动力学方程，利用Newmark-β方法，对车桥耦合问题进行数值求解，比较分析了桥梁轴向力、车速等对系统动力学响应的影响。

In this part, the characteristics of transient responses of flexible rotor systems with arbitrarily distributed mass on isotropic or anisotropic supports passing through several critical speeds seguencially are examined. Here, the current knowledge of rotor dynamics on the eigenproblem of damped free whirling vibration, the generaliged damped mode theary, the transient forced vibration and so on combined with KBM asymptotic method in the nonlinear vibration theory is employed and extended.

作者综合运用并引伸推广转子动力学关于阻尼自由回旋振动的特征问题、广义阻尼模态理论、瞬态强廹振动等現代理论和方法，结合非线性振动理论中的KBM渐近法，提出自己独創見解和覌点，成功地建立起正回旋和逆回旋两种情况下转子通过临界点的瞬态振动一阶微分方程组，可以在临界点的邻域内从事方程的数值积分计算。

Based on the conventional SIMPLE algorithm, a set of new dependent variables of momentum equations is introduced to extend the application of the pressure correction method for compressibe viscous flows and to accelerate the convergence.

在传统SIMPLE算法的基础上，本文提出了一种新的动量方程流场控制变量的选取方法，进而使本文所提出的压力修正法更适用于可压粘性流动的数值求解，同时也加快了收敛速度。

The phase separation kinetics of liquid crystalline polymer/flexible polymer blend was studied with the coupled time dependent Ginzberg Landau equations for compositional order parameter and orientational order parameter S ij , which were numerically solved by means of the cell dynamical system in two dimensions .

利用元胞动力学方法在二维情况下对浓度、取向序参量的含时Ginzberg Landau方程进行数值求解，研究了液晶聚合物/柔性链聚合物共混体系的相分离动力学，考察了浓度、取向有序过程的耦合对相分离形态的影响。结果表明，此耦合作用对相分离的时间进程以及相分离图样的空间排布都有影响。

Cavity flows both with and without sound excitation are studied by solving the 2 D time dependent Reynolds averaged Navier Stokes equations using explicit predictor corrector difference algorithm of Mac Cormack.

采用显式MacCorma－ck二步预估校正有限差分格式，求解二维雷诺平均非定常Navier－Stokes方程；并用Cebeci－Smith代数紊流模型作适当修正来模拟紊流效应，对有、无前缘声激励两种情况的空腔流场作了数值模拟，计算的振荡频率及振荡幅值都与实验结果基本符合，并且较好地模拟出了声激励对流场的影响。

It is used to solve the discretized equation which is derived by EFGM.

精细积分法是求解常微分方程的一种成熟的数值算法。

The steepest descent method was applied in optimization to solve the quadratic matrix equation,and a new algorithm was given.

结合优化理论中最速下降法思想，给出一种新的算法解二次矩阵方程，并列出几个数值例子说明算法是可行的。

Meshless method is a new numerical method on problem for determining solution of differential equation.

无网格法是求解微分方程定解问题的一种新数值方法。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新