内蒙古自治区交通公众出行信息服务系统建设方案研究

公众出行信息服务建设在今后的几年中将是交通信息化建设的重点内容。通过对国内外公众出行信息服务系统的建设现状的分析,针对内蒙古交通公众出行信息服务的需求,提出具体的系统建设方案。     

云南省综合交通信息公众服务平台设计

为了有效提升云南省综合交通信息公众服务水平,本论文对云南省综合交通信息公众服务平台进行了设计。平台通过6大系统:综合交通信息网站服务系统、交通呼叫云服务系统、综合交通信息短信服务系统、综合交通信息电子显示屏服务系统、综合交通信息移动终端服务系统和综合交通信息广播电视服务系统的建设,采用多种方式面向社会公众提供公路、水路、铁路、民航基础信息、实时路况信息、交通诱导信息、客货运信息、交通气象信息、交通旅游信息等综合综合交通信息服务,为公众的出行、货物的流通提供高效便捷的服务。     

数字广播技术在交通信息服务中的应用

文章主要研究了数字广播技术在交通信息服务中的应用,从交通信息服务行业的发展现状出发提出了交通信息服务技术对数字广播的需求,介绍了交通信息服务系统的系统框架以及信息传输在整个系统框架的作用,分析了数字广播技术的特点,研究了如何利用数字广播技术将交通服务信息按照不同的需要以适当的方式展示给信息使用者,分析并设计了实现数字广播技术的子系统架构。     

基于ETC数据的高速公路应用服务框架研究

高速公路不停车收费系统(ETC)是智能交通领域中的一个重要子系统,系统积累的大量收费交易数据,包含交通流和高速公路用户的多种特征信息.文章在分析ETC相关数据基础上,进行了ETC用户的需求调研,并针对高速公路出行者进行了交通信息类型、信息提供方式、服务功能等需求分析.最后,提出了面向高速公路使用者、运行监管者和管理者的ETC数据应用服务框架,涵盖了高速公路路网基础特征分析、高速公路客户分析管理、出行路径规划等内容.     

公路网管理与应急处置服务技术研究

随着公路网规模逐步延伸庞大,公众跨区域出行和物资流动迅猛发展、交通突发事件呈现递增现象,建设公路网管理、应急处置和信息服务系统为必然趋势。分析了公路网日常管理、突发事件应急处置、出行信息服务及基础数据支撑的系统功能需求,以省域公路网为研究对象,基于逻辑框架方法,设计了融合日常监控、突发事件预警监测、资源调配与指挥、多方信息联动等多功能的综合性集成平台系统方案,并给出了突发交通应急事件处置流程。研究表明,所构建系统能够掌握实时全面交通信息,实现全路网的协调管理,有效提升应急处置能力和服务水平。     

基于信息资源整合的公众出行交通信息服务系统

以上海公路网的公众出行交通信息服务应用为例,给出了基于信息资源整合的公众出行交通信息服务平台的总体架构,着重对交通信息资源整合系统、关系公众出行的相关交通信息查询、实时交通路况发布、交通阻断上报与发布、动态路径诱导等进行介绍.     

交通综合信息平台建设研究

建立一个基于GIS-T的交通综合信息平台。它能够接受、存储和处理多源异构数据．能够为各种应用子系统和公众提供良好的信息服务。同时，对平台的框架设计、功能构成以及平台实现的关键技术进行说明和分析。     

中国交通出行和信息服务发展趋势与需求研究

中国当前已进入交通和信息服务快速发展时期,本文结合大量实际数据和理论分析,从社会发展、经济、政策环境、科技发展等多个角度对中国交通出行发展趋势和出行信息服务需求进行了较为全面的分析,并对交通出行信息服务系统建设的多维度需求分析框架和服务需求重点进行了论述。     

面向交通规划的多城市、多平台交通信息网络结构研究

为解决城市交通规划中基础数据匮乏、数据共享性差的问题,研究多城市、多平台交通信息网络结构的管理机制与总体框架。基于系统动力学理论,解析区域性城市交通系统同区域内各城市社会经济子系统的相互关系,研究多城市、多平台交通信息共享机制与管理模式,提出了信息共享的3种模式：主动信息共享、政府行为型模式和商业模式;面向区域性交通规划与管理信息服务,构建了由网络状中心构成的多城市、多平台交通信息网络的总体框架,研究了平台的运行机制。     

基于驾驶人瞳孔直径的追尾冲突辨识方法研究

以提高交通冲突辨识与驾驶人认知一致性为目的,以驾驶人心理负荷对瞳孔直径变化的影响为理论基础,以追尾冲突下瞳孔直径在时序上的变化为研究对象,使用傅里叶变换在频谱层面对数据进行逐点扫描并完成模板瞳孔直径数据曲线和全程瞳孔直径数据曲线的匹配,最终提取出与模板数据对应时间车辆运行状态相似度较高的时段,辨识结果相对人工同步录像辨识结果的准确率为71.4％.证明了基于驾驶人瞳孔直径的追尾冲突辨识方法的可行性和有效性,为提高交通冲突辨识与驾驶人认知的一致性提供了崭新而有效的方法.     

Experimental modeling of controlled suspension vehicles from onboard sensors

In this article, identification of vertical dynamics of vehicles with controlled suspensions is considered. Identification is performed from experimental data measured on a four-poster bench test of a segment C car, equipped with a CDC-Skyhook dampers control system. The measurements are obtained from the onboard accelerometers needed by the control system. A nonlinear model in regression form is identified, having the road profile and damper control currents as inputs and chassis accelerations as outputs. The model is identified by means of a set membership structured identification method, which takes advantage of physical information on the structure of the system, decomposing the system into three subsystems: one represents the chassis and engine and the other two represent the overall behavior of front and rear suspensions, wheels and tires. This decomposition allows us to avoid the complexity accuracy problems derived from the high dimension of required regression space. Indeed, the overall high-dimensional identification problem is reduced to the identification of lower dimensional subsystems and to the estimation of their interactions. An iterative scheme is used for solving the decomposed identification problem. As the chassis pitch is small for the usual road profiles, the chassis-engine block is considered linear and standard linear methods are used for its identification. The other two subsystems are the main sources of nonlinearities in the system, mainly due to the significant nonlinearities of controlled dampers and of tires. Owing to the complexity/accuracy problems of a physical modeling of these subsystems, an input–output approach is taken. In particular, a nonlinear set membership method that does not require the search of the functional form of involved nonlinearities is used for the identification of these subsystems. The iterative algorithm converged in two iterations to a model providing a quite satisfactory simulation accuracy for all the considered road profiles and CDC-Skyhook settings.     

Experimental modeling of controlled suspension vehicles from onboard sensors

In this article, identification of vertical dynamics of vehicles with controlled suspensions is considered. Identification is performed from experimental data measured on a four-poster bench test of a segment C car, equipped with a CDC-Skyhook dampers control system. The measurements are obtained from the onboard accelerometers needed by the control system. A nonlinear model in regression form is identified, having the road profile and damper control currents as inputs and chassis accelerations as outputs. The model is identified by means of a set membership structured identification method, which takes advantage of physical information on the structure of the system, decomposing the system into three subsystems: one represents the chassis and engine and the other two represent the overall behavior of front and rear suspensions, wheels and tires. This decomposition allows us to avoid the complexity accuracy problems derived from the high dimension of required regression space. Indeed, the overall high-dimensional identification problem is reduced to the identification of lower dimensional subsystems and to the estimation of their interactions. An iterative scheme is used for solving the decomposed identification problem. As the chassis pitch is small for the usual road profiles, the chassis-engine block is considered linear and standard linear methods are used for its identification. The other two subsystems are the main sources of nonlinearities in the system, mainly due to the significant nonlinearities of controlled dampers and of tires. Owing to the complexity/accuracy problems of a physical modeling of these subsystems, an input-output approach is taken. In particular, a nonlinear set membership method that does not require the search of the functional form of involved nonlinearities is used for the identification of these subsystems. The iterative algorithm converged in two iterations to a model providing a quite satisfactory simulation accuracy for all the considered road profiles and CDC-Skyhook settings.     

交通信息的有效性研究

交通信息的有效性是指交通信息能否有效的提高现有道路交通网络的使用效率。在采用线性费用函数的前提下,使用确定性用户平衡(UE)和随机用户平衡(SUE)两种交通分配模型,分析实时交通信息对简单交通网络的影响,证明交通信息的提供能否有效提高现有路网的使用效率,取决于路网的通行能力等实际状况,与网络内的交通流量无关,而且交通流量的变化,不会引起路网内个人行驶费用节省量的根本性变化。最后的两个实例证明文中结论的正确性。     

出行者特征要素对公交服务模式的影响分析

公共交通是面向大众的服务,公共交通服务模式的制定与完善需要重点考虑出行者的出行需求,才能从根本上提高公共交通的竞争力.借鉴服务经济学的理论将公共交通服务模式分为公交服务标准、出行者界面、公交服务环境和技术4个维度.基于攀枝花市居民出行调查与公交专项调查数据,应用SPSS定量分析出行者特征要素与公交服务选择的相关性,以考...     

公交专用车道效益评价方法探讨

对于设置公交专用车道的城市道路,其核心功能是满足人的出行需求。因此公交专用车道的评价应以人为单位,而并非以车辆为单位。本文提出的公交专用车道效益评价方法主要从单点交叉口的交通效益、通道的综合效益进行。文章的最后,运用该理论对广州市某路段公交专用车道及相关道路进行了评价和分析,验证了该方法的可行性。     

Providing personalized system optimum traveler information in a congested traffic network with mixed users

The advancement of information and communication technology allows the use of more sophisticated information provision strategies for real-time traffic management in a congested network. This article proposes a personalized system optimum traveler information (PSOI) system under ubiquitous communication, which allows traffic system operators to fully optimize and coordinate individuals' trip plans according to the personal attributes, such as real-time location, value of time, allowable budgets for congestion tolling, and willingness to take detours. We also developed an efficient queue-based evaluation and solution heuristic algorithm using mesoscopic simulation models to solve for near-optimal PSOI strategies—route suggestions for each individual traveler. The simulation optimization algorithm can account for different information users and provide predictive information that robustly accounts for potential decisions of other travelers in real time. Case studies were carried out on a test network and a real-world network, and the proposed heuristic algorithm is proven effective. Also, sensitivity analyses show that PSOI not only is an effective traffic management method in reducing average system travel time, but also potentially provides travelers with reasonable or even shorter travel times compared with other information users. Further, simulation results showed that even in mixed traffic, PSOI is able to shorten travel times for both users without information and users of other information types. Thus, PSOI is recommended by this article as an advantageous way for next-generation advanced information systems and dynamic traffic management.     

咨询电话在省域公路网调度系统中的应用研究

向公路出行者提供良好的出行服务是路网调度系统工作的主要功能之一,公路出行信息服务方式多种多样,以咨询电话为例,首先提出了省域公路网调度系统信息发布设计方法,然后在此基础上重点分析了咨询电话信息发布方案设计,从信息发布内容设计、用户界面接口设计、菜单流程设计和系统容量确定等4个方面进行了研究,以期为相关工作提供参考。     

高速公路营运管理综合数据中心框架设计研究

为适应信息化要求,整合并优化配置信息资源,推进信息化建设,提升高速公路管理业务服务水平,在分析高速公路信息化现状和需求基础上,结合云计算、数据仓库、数据挖掘融合等技术理念,架构出1种信息化系统综合数据中心框架体系,梳理了数据中心营运管理业务的数据流程,设计数据中心平台及子系统功能,提出了数据中心建设运行的标准规范和安全管理机制。      

面向安全的悬索桥综合监测系统框架研究

针对悬索桥梁安全监测中各子系统分散的现状,构建一种涵盖结构、交通、环境等信息的桥梁安全综合监测系统框架,并提出系统功能及数据集成与挖掘关键技术,该综合监测系统通过统一平台集成桥梁结构健康监测、主缆除湿监测、供电设施电力监测、交通运行监测、外界环境监测等子系统的信息资源.     

浅谈采用菱形挂篮对称悬臂浇注施工方法

菱形挂篮由菱形桁架、提吊系统、走行和锚固系统及模板系统4部分组成。该文通过某工程预应力混凝土连续箱梁采用菱形挂篮对称悬臂浇注施工的实例,详细介绍了菱形挂篮的各组成系统及行走施工程序,并总结了其施工特点。