First, constructed high order staggered-grid difference formulas, and discussed the stability and numerical dispersion of staggered grid method.

首先，构建高阶交错网格差分公式，讨论了交错网格法的稳定性与数值频散。

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This paper proposes a new algorithm based on conformal mapping and FDTD method, and derives the numerical stability and numerical dispersion equations of conformal mapping FDTD algorithm.

本文提出了新的保角变换FDTD算法，推导了保角变换FDTD算法的时间稳定性和数值色散方程。

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Then the article discusses forward modeling based on acoustic wave higher difference, then analyzes numerical dispersion including time and spatial dispersion and presents its stability conditions.

接着，简要介绍了基于声波高阶差分的多次波正演模拟方法，分析了这种方法的数值频散问题，包括时间和空间频散，同时给出了它的稳定性条件。

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