本文应用等值浅水模式，采用截断模方法，分析了急流的稳定性，并给出急流上不稳定波出现的条件。
In the text, we used equivalent shallow water model and truncated model method to analyse the stability of the jet, and pointed out the conditions of the appearing of instable wave.
本文研究了计算网格地形、波高等值线、速度场和波面的可视化。
In this paper, the method for drawing grid-based terrain, contour, and velocity field and wave surface are studied.
计算获得了船体上波形以及船波等值线图。
The wave profile along ship hull and wave contours were obtained.
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