Stability, numerical dispersion and boundary condition are the several key problems in the seismic modeling.

稳定性, 数值频散和边界是数值模拟中的关键性问题.

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Thethe velocity almost has no and generally the numerical dispersion can be substituted for physical diffusion.

而且在精度要求不高,物理扩散较小时,数值稳定性好的对流方程的数值弥散可以代替物理扩散.

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At the same time, the numerical dispersion in FDFD algorithms should be avoided.

同时在确定空间步长时要避免频域有限差分法中可能会出现的数值色散问题.

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