Based on the mechanics of wave, the expression of water wave propagation velocity under the action of gravity is deduced and the effect of surface tension on small wave is analyzed.
本文根据波动理论推导出在重力作用下波的传播速度表达式，分析了微小波动中表面张力的作用。
Combing the wave field snapshot with the corresponding velocity section proves to be important in the observing of wave propagation.
将波场快照与速度剖面相结合，可以更好地观测到波的传播过程。
The propagation velocity of elastic wave with different frequencies in same medium is various, which is called dispersive problem of frequency.
相同介质中不同频率的弹性波传播速度是有差异的，即频散问题。
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