【作者】 张颖；

【导师】 黄席樾；

【作者基本信息】 重庆大学 ， 控制理论与控制工程， 2005， 硕士

【摘要】 论文是以重庆市科学技术委员会资助项目“城市交通紧急事件处理与安全系统”(项目编号7742-2)为研究对象,在借鉴和学习现有的理论和方法的基础上,分析交通事故处理的相关因素、流程和特点,结合我国特别是重庆市的实际情况,逐步建立了既基于理论研究又利于工程应用,且具有自身独特结构的一般性模型及应用方案。在结合地理信息系统、数据库等技术的基础上提出了一种新的较为完善的事故救援响应模型,设计出了针对重庆市主城区道路交通的紧急事件处理系统。通过该系统将交通监控中心、交警、道路养护管理机构、医疗救援机构、火灾救援管理中心等机构联成一个有机的整体,为道路使用者提供现场紧急处置、拖车、现场救援、排除事故车辆等服务。从而大大减少紧急事故引起的交通阻塞和延误水平,提高车辆运行的效率,最大限度的减少由此带来的人员伤亡和财产损失。本论文首先介绍了国外在智能交通领域的发展现状,以及国外ITS 未来的发展趋势。建立紧急事故应急系统已经成为各国发展智能交通系统的目标之一,提出了在我国建立城市紧急事故处理系统的必要性。论文接下来以建立系统模型为出发点,分析了系统的特点,在此基础上提出了建立系统的一般模型规划,针对一般模型规划的不足,对该模型规划进行了优化,建立了基于最优规划的交通事故救援模型。在建立了救援模型后,论文对系统路径寻优算法Dijkstra 进行了较为详细的介绍,针对该算法效率低的问题,从缩小搜索节点范围和优化数据存储结构等方面对算法进行了优化。在数字地图建立方面,以Mapinfo 作为GIS 建立工具,采用VC++对其进行二次开发。以Oracle 9i 为数据库建立平台,建立系统的地理信息数据库,并详细分析了数据库的数据结构设计特点。论文最后以重庆市主城区为背景建立紧急事故处理系统,对系统进行仿真,系统的仿真结果表明,系统的救援模型对多发事故有很好的响应能力,优化的算法具有很好的实时性,系统有较好的应用前景。更多还原

【Abstract】 By taking ‘manage and safety system of urgent urban transport event’which is financed by fund of ChongQing science technology council as researchful object, according to the nature of road net and actuality of traffic in ChongQing, and depending on the actual theory and technique, analyzing related factors, flow and characters in traffic accident management. A commonly structure model and applied project are designed, which are based on theory study and engineering applications. A better traffic accident rescue model is built on the GIS and database technology, and a management system of encountering an emergency in city traffic is designed. The system assembled the traffic monitor center, traffic police, road maintained institution and firehouse as a organic whole, which provide various rescue service for road user. And it can reduce traffic jam and improve vehicle run efficiency consumedly, which also can reduce casualty and wealth loss greatly. Firstly,the paper introduce oversea developmental actuality and future trend of the intelligent traffic system, and which all input forward a goal to build a encountering an emergency rescue system, especially in China. Secondly, the paper take the system model as start, analyzing the character of system, and build a common model. At the same time, the shortage of model is studied, and then a new model based on optimized programming in traffic accident rescue model. After the building of optimized model, the paper introduce the Dijkstra algorithm detailed, and also point out the deficiency of algorithm in time efficiency, and through the reducing in the node range and optimizing data memory structure,a optimized algorithm is designed. City road net database is built on the Oracle database, and the system is developed with MapInfo and VC++6.0. Lastly, the paper takes the city transport event and safety system of Chongqing based on the proposed model as background. The simulation on our algorithms and sample data achieved promising results in real time and response aspect, the system has a better-applied foreground.更多还原