The vortices in the vortex wave flow have particular moving structure, they develop downstream first, stay at the point for a short time, then move upstream.
涡旋波流场中旋涡有其独特的运动规律——先向下游移动，停留很短的时间后，然后向上游移动。
Venant's differential equations. The general analytical solutions of 1st and 2nd approximations have been given for one directional wave flow which propagates into the steady flow region.
对向定常流区推进的单向波问题给出了解的一级近似和二级近似的普遍表示式；
The differential pressure signals of flow in a horizontal pipe are studied by wavelet analysis. The flow pattern can be recognized easily according to the characteristics of plug flow and wave flow.
采用小波变换分析水平管流上的压差信号，根据段塞流与波状流的小波分析特性，可容易地识别流型。
Several leak diagnosis methods such as instantaneous negative pressure wave, flow-lack, and hybrid diagnostic method were used.
采用了瞬态负压波法、流量输差法和压力流量综合法等多种泄漏诊断方法。
The cause of the packet energy variation is wave-flow interaction produced by temporal variation of the wind.
能量变化的实质是，风场的时变性引起了波流相互作用。
The cause of the packet energy variation is wave-flow interaction produced by temporal variation of the wind.
能量变化的实质是，风场的时变性引起了波流相互作用。
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