有限元法

The main dimensions are calculated by magnetic track, then the fields of load and without load are computed by 2-d FEM and references of the motor are obtained, so the structure of the motor can be adjusted.

用磁路设计法确定电机的主要尺寸，然后用二维有限元法计算电机的空载和负载磁场分布，得到电机的参数和性能，根据性能要求对电机结构尺寸调整。

Based on the study, the modeling of geared rotor system and the application of modal synthesis method for rotor system were discussed.

基于转子系统的有限元法的研究，从理论上分析了齿轮传动转子系统的模态综合法的建模和求解的具体步骤。

The experimental tests of stiffness and natural frequency are carried out and the results are compared with the results of finite element analysis and analytical method.

通过实验测试了该柔性机构的刚度和固有频率，并分别与有限元法和解析法的结果进行对比分析。

At the beginning of fourth chapter, the article transforms the solving problem of partial differential equation for the American put price into a standard initial and boundary value problem of Parabolic Type by making some transformations.

在第四章，对美式看跌期权价格所满足的偏微分方程定解问题通过作一系列变换，使之转化为一个标准的抛物型初、边值问题，接着又通过傅里叶变换，把抛物型初、边值问题转换为一个关于时间变量的常微分方程初值问题，然后再分别利用改进的欧拉法和有限元法对其进行了求解。

In the numerical computation, a two-dimensional numerical method integrating finite element method and difference method was employed, where the finite element method is used to calculate the magnetic field of the permanent magnetic guideway and the difference method is used to calculate the induced current in the superconductor, then the levitation force and the lateral force were calculated by Lorentz formula.

在数值计算部分，实现了一种集有限元法与差分法为一体的数值计算方法。

The parameter can be worked out by used the Finite element method and energy perturbation.

利用有限元法和能量摄动法对电机的电感参数进行计算分析。

Using the Updated Lagrange finite element method and the elastic-plastic large deformation finite element formula based on virtual work-rate principle of finite deformation, the author studies in detail the plastic flow rule of MPF, including the influence of the work hardening index, friction, thickness of sheet, material, number and position of the punch.

作者采用逐级更新Lagrange法以及有限变形虚功率增率原理的弹塑性大变形有限元法，详细研究了金属板材多点成形的塑性流动规律，包括加工硬化指数、摩擦系数、板料厚度、材料、冲头个数及位置等对成形的影响，同时探讨了分段成形时的金属流动规律。

Tensile membrane ; dynamic relaxation method ; nonlinear finite element method ; structural design

张力膜；动力松弛法；非线性有限元法；结构设计

This method is more rational than tradional safety factor method in the judging of degree of sagety of structure.

较之于基于经验的传统的安全系数法，该方法在结构安全度的判断上更加合理，为有限元法在抗滑稳定分析中的应用和发展创造了良好条件。

The result of this method is accurate solution of differential equation because it is on the basis of analytic method. Compared with the value solutions, it has a lot of characteristics such as clear concepts, simple steps, quick convergence rate, etc.

此方法是建立在解析方法的基础上，得到的结构内力和位移具有足够的精度，它和目前应用广泛的有限元法、差分法等数值解法相比，具有概念清晰、步骤简单、收敛速度快等特点。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。