There is a number of process relying, self organization and evolution in the complex system, so the traditional modeling method is difficult.

复杂系统中存在着大量的过程依赖、自组织，并且一直是进化的，用传统的方法对其建模十分困难。

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Considering the problem of assembly constraints evolution in the process of product assembly design, a method of assembly constraints modeling based on mating surface couples was presented.

针对产品装配设计中存在的装配约束演化问题，提出了基于配合面偶的装配约束建模方法。

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Through the numerical modeling of mass transfer at the different conditions, the evolution of the droplet in the whole process is analyzed.

在不同的操作条件下，对液滴和反溶剂之间传质过程进行数值模拟，分析液滴在整个传质过程中变化趋势。

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