有限元法

First the FEM-BI (Finite Element – Boundary Integral Methods) base on vector element is presented to compute the electric field in the cavity backed antennas.

计算中首先采用基于矢量单元的"有限元－边界积分方程法"计算出背腔天线内部电场的分布；再采用互易原理求解天线的远区场，从而获得天线的辐射方向图。

Heat equation; finite element method; inverse problem; probe method; size estimate

基础科学，数学，数学分析热方程；有限元；反问题；探测法；大小估计

In order to know the response of membrane structure under wind and snow, static FEM analysis has been performed making use of step by step load and iteration with updated stiffness.

为了掌握膜结构在风荷和雪荷作用下的反应规律，本文采用增量变刚度迭代法，进行有限元静力分析。

Finite element formulation based on lagrange multiplier techniques for transient contact-impact problems is presented.

bstract 介绍瞬态接触－冲击问题的一种基於拉格朗日乘子法的有限元公式系统及其数值求解。

The key technologies are studied and the simulation program is coded using C langrage to obtain the fields such as velocity field and temperature field. Volume of fluid method is used to capture the free surface of the material.

采用"移动的网格"处理计算区域边界的移动问题，实现对真实物理过程的数值模拟，并将模拟结果与比较成熟的商品化有限元软件DEFORM-3D的模拟结果进行对比，表明所建立的有限体积法模拟模型有效、可靠。

With application of plastic limit analysis method using finite element method, stability of high loess slope is analyzed and solved by using linear programming method in this paper. Safety factor and stress fields and velocity fields of slope can be obtained.

本论文采用有限元塑性极限分析法对黄土高边坡进行稳定分析，并运用线性规划的方法对稳定问题进行求解，可以得到边坡的稳定安全系数和边坡的应力场及速度场。

Appraising the current methods of slope stability, the paper puts forward Finite Element Plastic Limit Analysis of the slope stability subjected to pore water pressure.

本论文对目前用于边坡稳定性评价的主要方法进行了研究对比后，提出了考虑孔隙水压力条件下的边坡有限元塑性极限分析法。

A conservative remapping algorithm based on donor-cell method for multiscale dynamic simulation is proposed which couples micro molecular dynamics simulation with macro finite element method.

针对耦合微观分子动力学和宏观有限元方法的多尺度模拟，提出一类新的基于贡献单元法的网格守恒重映算法。

Macrograph of the fusion zone in the transverse section obtained from experiment and residual stresses determined by hole-drilling method are used to validate the simulated results. The experimental and numerical results are in sufficient overall agreement, which proves the validity of the finite element model.

实验得到的焊缝宏观形貌和小孔释放法检测到的焊接残余应力对计算结果进行验证，实验结果和计算结果吻合较好，证明了有限元模型的正确性。

The calculating results show that the analytical and numerical results have great consistency, and the maximum relative error is only 4.5%.

计算结果表明，能量法的解析解和有限元结果吻合很好，其最大相对误差仅为4.5%。

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。