It analyses the relation by Newton's iteration method, which shows the select of the time step has a relation with the mesh size and dispersion error.
利用牛顿迭代法对其进行了全面的分析，发现了时间步长的选取与网格、色散误差的大小有一定的联系。
The key to successful application of this method in real data processing lies in appropriate spacial grids and time iteration step size.
选取合适的空间网格距离和时间迭代步长，是该方法应用到实际资料处理中的关键。
The method of reliability analysis was a limit step length iteration method(LSLIM).
其中，可靠指标的迭代求解方法是有限步长迭代法。
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