重庆市轨道交通三号线车辆基地功能定位及合理布置

从重庆市轨道交通路网规划出发,分析三号线车辆基地组成和功能定位,提出总平面布置方案,既满足单轨车辆使用要求,又充分发挥配套设备能力,体现技术先进、节省投资的设计特点。     

轨道交通车辆基地污、废水资源化利用研究

为保护环境,响应节能减排的号召,城市轨道交通车辆基地污、废水的资源化利用正逐渐受到重视。以国内轨道交通车辆基地生活污水、生产废水处理工艺为研究对象,通过调研分析车辆基地污废水水量水质、处理工艺和运营模式等,提出了车辆基地污废水系统资源化利用的对策及建议,可供同类工程参考。     

高速公路信息系统建设研究

文章结合柳州高速公路运营有限公司实际运营管理现代化建设实际,在对高速公路信息系统整体需求进行分析的基础上,围绕高速公路路网进行运行监测分析,研究了高速公路运营管理现代化信息系统的一体化解决方案,以提升高速公路运营管理的各业务部门对路网信息、应急处置信息和行政管理信息的收集、存储、处理、提取及数据交换的能力,统筹各项高速运营管理业务,实现规范化、标准化及智慧化高速公路运营管理。     

上海轨道交通形成网络化运营的特点及对策初探

介绍上海轨道交通网络建设和网络化运营的概况,对网络化运营产生的诸多新问题、新特点进行分析,提出若干管理和技术方面的应对措施,并建议针对上海轨道交通网络化运营这一重大课题广泛开展研究、探索和策划。     

从网络化运营角度看当前城市轨道交通应关注的问题

在介绍城市轨道交通网络化的内涵、本质和核心的基础上，分析了网络化运营过程中涉及到网络层面的相关要点，阐述了从网络化运营角度看当前城市轨道交通建设应该关注的几个问题，重点就标准化、国产化和信息化等问题进行了详细分析，同时也提出了基于网络化运营的城市轨道交通建设和技术发展的方向。     

道路网络化货运发展模式和运营机理研究

文章阐述了道路货物网络化运输的内涵和特点,构建了我国发展道路货物网络化运输的两类模式,利用图示和流程图的方式,从货源组织、车辆运行、业务经营三方面阐述了两种模式下的运营机理。     

轨道交通车场内检查坑预制装配式混凝土立柱设计及应用分析

随着城市轨道交通的快速发展,车辆基地建设质量与速度需求不断提升。预制立柱结构具有质量好、维护成本低等优点,为新线车辆基地检查坑建设提供了一种新思路和工法。介绍了轨道交通车场车场内检查坑立柱施工质量控制中的短板及运营后暴露出的问题,分析了预制立柱方案的适应性及优缺点,提出了预制立柱方案并加以优化。这为检查坑立柱的设计及施工应用提供新了的方法和思路。     

西班牙政府对高速铁路支持政策研究

本文在研究西班牙高速铁路路网建设和运营现状的基础上,分析西班牙高速铁路的基础设施管理结构、融资模式及私人资本的引入;探讨了西班牙政府以及欧盟基金对西班牙高速铁路建设的财政支持、运营支持、票价政策等。     

浅谈宁夏路网运行监测管理工作的建设思路

本文概述了宁夏公路交通建设总体情况和公路运营管理的现状与特点,结合实际工作,分析了我区路网管理工作的发展需求及现阶段建设过程中存在的问题,浅谈了自己对宁夏路网运行监测管理工作的一点看法与建设思路。     

重庆城市轨道交通网络化发展进程和启示

本文结合城市轨道交通网络化建设的基本特点,论述了重庆市轨道交通建设从单线阶段到轨道交通骨架阶段,再到初步网络化阶段及最终基本网络化阶段的发展进程。从重庆市轨道交通发展进程分析,提出我国轨道交通网络化发展需要考虑六个主要问题,包括:编制好轨道交通线网规划和建设规划;积极探讨多渠道和多元化投融资方式;合理选择系统制式,提高运输效率;做好网络化运营准备和网络化运营体系;加强轨道交通的一体化服务,提高服务水平以及加强资源共享等。     

Application of multiple criteria decision making for network improvement

In this paper we propose application of multiple criteria decision making to problems of a metropolitan network improvement plan. Initially, a bilevel multiple objective network design model is considered in two objectives which are minimal government budget and minimal total travel time of road users. We seek feasible improvement alternatives among those bottleneck links in an existing road network structure and travel demand. We present an effective heuristic algorithm to obtain noninferior solutions; then ELECTRE III multiple criteria decision making and group decision making are used to evaluate and to select a compromise solution among those noninferior solutions. From the design phase in multiple criteria decision making, multiple objective mathematical programming is used to formulate a continuous network design model. However, from the phase of evaluation, multiple criteria decision making to solve the discrete network design problem. The network of metropolitan Taipei is taken as an example to illustrate the operation of this model.     

基于交通渗流理论的城市轨道交通网络动态服务瓶颈识别

为准确把握轨道交通网络化运营的新态势和新要求,力求轨道交通系统在大客流下做到运输能力和服务水平的供需匹配,需对轨道交通网络的关键瓶颈进行有效识别和疏解。本文借鉴交通渗流理论,提出了限制网络整体服务水平和连通效能的动态服务瓶颈的识别方法,该方法综合考虑了城市轨道交通系统的网络特性、客流特性和服务特性。其中针对区间服务水平状态,该方法提出了定量评定的复合指标模型。以成都地铁线网为案例,基于实际客流运营数据,构建动态网络,识别服务瓶颈,验证了方法的适用性和准确性,对城市轨道交通系统运营管理有实际指导意义。     

Measuring vulnerability of urban metro network from line operation perspective

Urban metro systems are subject to recurring service disruption for various reasons, such as mechanical or electrical failure, adverse weather, or other accidents. In recent years, studies on metro networks have attracted increasing attention because the consequence of operational accidents is barely affordable. This study proposes to measure the metro network vulnerability from the perspective of line operation by taking the Shanghai metro network as a case study. As opposed to previous studies that focused largely on disruption of important nodes or links, this study investigates the disruption from the line operation perspective. Betweenness centrality (BC) and passenger betweenness centrality (PBC), number of missed trips, weighted average path length, and weighted global efficiency were analyzed considering relative disruption probability of each line. Passenger flow distribution and re-distribution were simulated for different disruption scenarios based on all-or-nothing assignment rule. The results indicate that the metro lines carrying a large number of passengers generally have a significant impact on the network vulnerability. The lines with circular topological form also have a significant influence on passenger flow re-distribution in case of a disruption. The results of this study provide suggestions on metro system administration for potential improvement of the performance of operation, and passengers may meanwhile have an improved alternate plan for their commute trip when a disruption occurs.     

城市轨道交通运营突发事件应急处置体系的思考

结合上海轨道交通网络化运营生产组织工作实际,针对轨道交通生产经营过程中的风险源,对其运营突发事件的应急处置工作进行分析和研究,从风险源分析、能力评估、组织架构及体系建设等方面着手,提出能够适应城市轨道交通网络化运营需求应急处置体系的一些设想。     

基于LS-SVM的天然气管网负荷组合预测

针对现有组合预测模型,基于经验风险最小化原则,克服预测精度受组合模型限制的缺点,提出一种基于最小二乘支持向量机（LS-SVM）的天然气管网负荷组合预测模型,并与AR模型、BP神经网络模型、GM（1,1）模型以及最优权重组合模型进行了比较,得出基于最小二乘支持向量机的天然气管网负荷组合预测模型能够得到更高的预测精确度,可为天然气管网的安全运行以及优化调度提供决策支持的结论。     

Transportation policy analysis with a geographic information system: The virtual network of freight transportation in Europe

This paper presents a multi-modal freight transportation model based on a digitized geographic network. A systematic analysis and decomposition of all the transport operations i.e. moving, loading and unloading, transshipping and transiting, leads to the development of a virtual network where each virtual link corresponds to a specific operation, and all transportation modes and means are inter-linked. Software, called NODUS, automatically generates the virtual network so that the model can be conveniently applied to large networks. The analytical structure of the links notation makes it easy to attach specific cost functions to each virtual link. The model is applied to the trans-European freight network of roads, railways and inland waterways for the transportation of wood. Cost functions are built up for each operation by each mode/means combination. A detailed point-to-point origin-destination matrix, calibrated on Eurostat statistics, is generated by a Monte-Carlo technique. Then, the total transportation cost is minimized with respect to the choices of routes, modes and means. This provides estimations of transportation services demands as well as modal splits, to the extent that the two hypotheses of demand based on generalized cost minimization and market contestability are accepted. A sensitivity analysis on the relative road cost is made, which provides measures of arc-elasticities.     

An analysis of the methods used to calculate the emissions of rolling stock in the UK

The aim of this paper is to analyse and compare the methods used for calculating emissions of UK rolling stock based on their type and mode of operation. The three modes under comparison were; diesel, electric and bi-mode. As well as comparing these three modes of operation, a comparison between Conventional, Freight and High Speed Rail was made. Alternate fuels were considered for diesel and bi-mode locomotives and compared based on their environmental impact. The emissions of trains were studied using three methods. Specifically, the three chosen methods were used to calculate the emissions of each train and a comparison of these methods was made. In the current UK energy climate, diesel trains emit less emissions than electric trains when factoring in mechanical and air resistances. Bi-mode trains have their place in the UK network but with electrification of the network currently in place, this mode of operation will become redundant in the near future. High Speed Rail, although time efficient, releases high emissions due to energy consumption increasing with the square of speed. Alternative fuels, such as biodiesel, should be a consideration for the future of rail, as emissions fall dramatically with content of biodiesel in fuel blends.     

An application of transyt for mixed car/streetcar operation

While the TRANSYT model for optimization of fixed-time traffic signals in a network of mixed transit and private vehicle traffic is well established, certain interactions between transit and nontransit vehicles are not properly modelled in TRANSYT. As a consequence, the optimal signal timing plan and network performance measures generated by TRANSYT may not be appropriate for the actual network. This paper briefly reviews a modelling procedure, adapted for use in the TRANSYT program, that goes some way toward overcoming TRANSYT's deficiencies in the representation of mixed traffic operation. The procedure is applied to a 6 kilometre corridor of mixed traffic operation in Toronto, Canada, to estimate the potential effects of incorporating streetcar operations in the optimization of fixed-time traffic signals.     

基于DEA法的大城市快速路网综合评价研究

文章从定量和定性两个角度，建立了快速路网运行效率的综合评价指标体系，并利用DEA方法建立快速路网综合评价模型，通过实例对城市快速路网的运行效率进行有效性评价分析。结果表明，该方法具有较强的可操作性和实用性。     

长途跨线高速列车直达与中转选择问题

我国快速客运网基本形成,长途跨线列车直达与中转选择对于高速列车开行方案设计至关重要。为提升长途跨线高速列车开行效益和服务品质,按长途跨线列车直达与中转方式对比的思路,以旅客出行需求、基础设施能力、移动设备能力等多方面因素对长途跨线列车开行方式的影响为约束条件,研究长途跨线列车直达与中转选择模型及求解方法。选取2025年15个长途跨线起讫点为对象进行案例研究,提出D站—E站、F站—D站等9个起迄点之间开行长途跨线直达列车的建议方案,研究表明直达与中转换乘选择模型能够解决长途跨线列车开行方案编制问题。