We use finite difference method to solve electromagnetic wave equation.
采用有限差分方法，对波动方程求数值解。
The way of using finite difference method to solve the dynamic response factors of a two dimension problem is shown.
同时还介绍了用有限差分法计算二维问题的响应系数的方法。
We adopt five nodes difference method to solve thermal stress problem and thermal buckling problem, because this method is more precise.
在平面温度应力问题和热屈曲问题的计算中，采用了精度更高的五节点差分法来进行计算。
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