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。
Applying the finite difference method to solve mathematics model of the well tests, and the central difference method is used.
应用有限差分法对试井的数学模型进行求解，采用中心差分。
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