The effect of superficial gas velocity and static water height on the wavelet power spectrum is dis- cussed and the vibration mechanism of the tube is analyzed.
采用防水型加速度计，在不同工况下测定洗涤冷却管的振动信号，并用小波变换分析信号；讨论了表观气速和静态液位对小波功率谱的影响，分析了冷却管振动的原因。
The dam crest height is determined based on static water level, wave run-up, and freeboard. The freeboard is calculated according to the following formula.
坝顶高程由水库静水位加波浪爬高及安全超高决定。坝顶在静水位以上的超高按下式计算。
Based on static mechanism and kinetic equation of underground fluid, the model for calculating the height of the water cone with curvilinear side surface is established.
基于静力学原理和地下流体的运动规律方程，建立了底水油藏水锥体侧斜面为曲线情况下的水锥高度模型。
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