EAI蕴含的基本假定是，集成在后端进行，使用不是星形结构（hub and spoke），就是总线架构。
The fundamental premise behind EAI is that the integration is performed on the back end, using either a hub and spoke or bus architecture.
通过采用以太网星形结构的网络连接方式，将分散控制系统由总线形网络拓朴结构改为星形网络拓扑结构。
Through using network connecting mode of ether star structure, the distribubuted control system has been changed from busbar network topologic structure into a star network topologic structure.
星形拓扑，环形，树形和总线拓扑各自的特点是什么？
Star topology , ring , tree and bus topology what their characteristics?
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