The first, how to sort out data coming from experiments by the theory of boundary velocity gradient; Secondly, how to apply the data in practice.

在实践中应用该理论涉及到两个问题：一是如何将实验测得的数据整理成边界极限速度梯度，二是如何利用边界极限速度梯度反过来指导实践。

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The characteristic of this model is only to know basic and natural boundary condition, then the stream function and flow velocity required on the boundary are obtained.

这一模型的特点只需要知道边界上的基本边界条件和自然边界条件，就可以得到边界上所需要求的流函数和水流速度；

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Third, in order to calculate microscopic sweep efficiency in pore models, we define sweep boundary of displacement fluid, and determine it by velocity method.

第三，为了计算孔隙模型的微观波及效率，本文给出了驱替液波及边界的定义，并采用速度法确定其在流场中的位置。

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