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考虑尾气排放的匝道控制最优化算法研究 被引量:1
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作者 高万宝 邹娇 吴坚 《交通运输系统工程与信息》 EI CSCD 北大核心 2013年第1期156-162,共7页
匝道控制是缓解快速路拥堵的有效措施,而且有增加通行流量、提高运行效率、减少交通事故的功能,随着国民经济的提高,社会公众对环境污染的关注越来越高,所以研究考虑尾气排放减少的匝道控制是立足民生的课题.本文算法考虑了尾气排放因素... 匝道控制是缓解快速路拥堵的有效措施,而且有增加通行流量、提高运行效率、减少交通事故的功能,随着国民经济的提高,社会公众对环境污染的关注越来越高,所以研究考虑尾气排放减少的匝道控制是立足民生的课题.本文算法考虑了尾气排放因素,同时兼顾两个目标,一是减少总车辆旅行时间,二是最大量地减少尾气排放.利用Paramics仿真软件对算法进行了模拟实验,并且运用CMEM交通排放模型进行了计算,分析结果显示新算法有效地降低了总车辆旅行时间,而且比ALINEA算法更能降低匝道路段的尾气排放量和排队数,特别是在上坡坡度较大的情况下,新算法可以更多的减少尾气排放总量. 展开更多
关键词 智能交通 尾气排放减少 密度控制算法 匝道信号控制 Paramics仿真
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A new solution to wireless sensor network density control problem
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作者 石坚 《Journal of Chongqing University》 CAS 2006年第3期143-151,共9页
In this paper, we proposed a scheme based on Monte Carlo algorithm to test whether or not the nodes are redundant for realizing the node density control in the sensor network. The computational complexity is only O(n)... In this paper, we proposed a scheme based on Monte Carlo algorithm to test whether or not the nodes are redundant for realizing the node density control in the sensor network. The computational complexity is only O(n). We also established the coverage collision detection and back-off mechanism applied in the wireless sensor network. The simulation results show that the system can cover all the interested area with the smallest number of nodes and a coverage void will not appear during the course of state-transition. The coverage collision detection and back-off mechanism proposed in this article can be applied when the nodes have either synchronous or asynchronous mechanism. It also provides a stable stage with the length of the time that can be adjusted. 展开更多
关键词 wireless sensor networks density control Mento Carlo alogrithm coverage collision
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