The local behavior of the surface oil flow patterns is analyzed with phase plane theory of ordinary differential equations. Also the surface oil flow patterns are locally classified.
在此基础上利用微分方程相平面理论分析表面油流谱的局部特性和对流谱局部地进行分类。
Cubic equations of state are frequently used in the chemical and petroleum industries to model complex phase behavior and to design chemical processes.
立方状态方程经常被对模型在化学和石油工业里使用复杂的阶段行为，设计化学过程。
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