介绍一种基于交换式以太网的专家控制系统，该系统具有简单经济、灵活可靠、易于实现、维护方便等特点，有利于专家控制在中小规模企业中的推广与应用。
The system which is simple, economical, flexible, reliable, easy to realize and convenient to maintenance will be propitious to expert control's popularization in middle and small scale enterprises.
然后对交换式工业以太网的研究进行了综述。
After that, the research work in switched industrial Ethernet is surveyed.
针对交换式工业以太网的数据通信特点，采用遗传算法来寻找其网络划分问题的次优解。
Considering the communication characteristics of switched industrial Ethernet, genetic algorithms are used to find near-optimal solution for its network partition problem.
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