In this paper, for solving the parameter problem of two dimensional wave equation, the method of Finite Element and the Pulse Spectrum Technique, i. e. the iterative process are used.
本文针对求解二维波动方程的参数问题，利用有限元方法把波动方程反问题转化为有限元反问题，并利用脉冲谱技术，即一个迭代过程进行求解。
This phenomenon, peculiar to the two - dimensional wave motion, is sometimes called diffusion.
二维波所特有的这种现象，有时叫做弥散现象。
This phenomenon, peculiar to the two - dimensional wave motion, is sometimes called diffusion.
二维波所特有的这种现象，有时叫做弥散现象。
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