用交错网格的高阶有限差分方法解波动方程，在满足稳定性要求时，可获得时间和空间都是高阶精度的结果。
Highly precise solutions both in time and in space can be reached by solving wave equation with high order finite difference scheme of staggered grid under the condition of stability.
证明了有限元离散解对任意有限元空间的组合是稳定的。
The discrete solution is stable for any combination of finite element spaces.
采用时间有限差分离散， 空间有限体积离散的方法求问题的数值解。
The numerical solution is obtained by finite difference divergence of time, and finite volume divergence of space.
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