在这样情况，许多分数可能性密度函数模型是接近反应现象的一个适当的方法。
In such a situation, mass fraction probability density function model is an appropriate method to approach the reaction phenomena.
这里的粘弹性分数导数模型的等效线性粘性阻尼系统进行了讨论。
The equivalent linear viscous damping system for the viscoelastic fractional derivative model is discussed here.
引入数值模拟法预测气藏动态的基本思想，深入研究了组分数模模型；
The theory about performance prediction for gas reservoirs by numerical simulation is introduced, and the mathematical model of the compositional simulation is studied deeply;
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