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十字路口红绿灯PLC的控制系统.doc

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文档介绍:目录绪论······················································································································ 1 (一)本课题研究的目的和意义··············································································· 1 (二)城市智能交通系统的发展现状········································································· 1 1. 智能交通系统的基本概念··············································································· 1 2. 智能交通的发展简史····················································································· 1 3. 我国的 ITS 的建设现状·······································&#18