high order difference method 混合差分
high order limit difference method 高阶有限差分法
The high-order difference method of wave equation has the advantages of high accuracy and small numerical dispersion.
波动方程高阶差分法具有精度高、数值频散小的优点。
Numerical experiments show that the new method is better than some other high-order difference methods given before, and applicable for advection-dominated problem.
数值算例表明本文方法优于以往的几种高精度差分格式，且适用于对流占优问题。
It is theoretically shown that the application of high-order difference method in structure and velocity images decreases frequency dispersion error, but improves effect and accuracy of computation...
理论分析表明，在构造与波速成像中采用高阶差分方法，可以减小频散误差、提高计算效率与计算精度、获得满意的效果。
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