What's happening here is a stable "sustaining" phase in a product's lifecycle, managed in a waterfall state transition model with a flow.
这里表现的是产品生命周期里稳定的“持续(sustaining)”阶段，处在带有流程的瀑布状态转换模型的管理之下。
When the second derivative of the bubble number in unit bed volume with respect to gas velocity equals zero, the flow regime transition occurs. The model fits fairly well with the experimental data.
导出了当单位床层体积中气泡数目对气速的二阶导数为零时发生流型转变，该模型的计算机结果与实验数据吻合良好。
The author has applied the modified transition model into the practical flow field calculation, compared the calculation results and obtained some significant analysis results.
作者将修正的转捩模型应用到实际流场计算中，对计算结果进行了比较，从中得到了一些有意义的分析结果。
The model is applied to calculate the transition water surface profiles from supercritical to gradually varied flow or from gradually varied flow to supercritical flow in rectangular open channel.
应用该模型对矩形明渠中缓、急流过渡的水面曲线进行了数值计算，并与理论解进行了比较。
This condition was used as the theoretical criterion for transition from stratified flow to slug flow. The results of theoretical model compare well with the experimental data.
并将这个条件作为分层流向段塞流转变的理论判据，与实验结果进行比较分析，发现两者吻合的较好。
Based on the theory of the phase transition, gas dynamics, this dissertation set up the mechanical model of high speed natural gas flow with phase transition in Laval nozzle.
依据相变理论、气体动力学理论建立了描述有相变喷管中天然气高速流动的数学模型。
Based on the theory of the phase transition, gas dynamics, this dissertation set up the mechanical model of high speed natural gas flow with phase transition in Laval nozzle.
依据相变理论、气体动力学理论建立了描述有相变喷管中天然气高速流动的数学模型。
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