城市轨道交通线路合理长度决策模型研究

在综合考虑城市轨道交通线路经济效益的基础上,分析了影响城市轨道交通线路长度的因素.以相对净效益最大为目标建立模型,研究速度、站间距、客流密度对线路长度的影响程度.计算结果表明:城市轨道交通线路长度、平均站间距与经济效益均呈抛物线关系,三者之间相互制约.得到了各影响因素常见组合情况下效益-平均站间距-长度关系曲线图,并举例论述了采用跨站运营时需满足的跨站客流量.     

高速公路交通量观测站布设方法研究

分别基于相关性分析及传统公路规划中节点重要度理论．采用定量与定性分析相结合的方法对高速公路交通量观测站进行布设,可在一定程度克服以往观测站布设时的主观随意性。     

杭州市公共自行车系统规划

为解决“公交最后一公里”的问题,缓解城市“行路难、停车难”的状况,建设可持续发展的绿色交通系统,对杭州市公共白行车进行规划。通过分析杭州市公共自行车首批服务点存在的问题,结合实际情况与相关规划,提出了公共自行车的发展目标,应具备的特征、系统构架及规模。最后,提出服务点的布点原则和配车规模,并给出固定服务点近期布局规划方案。     

武汉市公共自行车租赁点布局规划

结合武汉市公共自行车租赁点布局规划,探索公共自行车租赁点布局规划理论,提出“总量控制,分类分块,平衡规模,灵活调整”的总体布局思路。将租赁点划分为公交点、公建点、居住点、游憩点和校园点5类,探讨居住点与其他租赁点位的空间和数量关系,指出居住点规模应大致与公交点、公建点和校园点的规模相当。最后,给出武汉市2009年拟建设的800个公共自行车租赁点的布局方案。     

Optimization and Algorithm for Through Train Connections at District Stations

In the optimization of train diagrams, selecting the arrival and departure paths of the through trains has a great impact on the dwell time at district stations.In this paper, on the basis of train paths and the through train connection time standard at district stations, we built a mathematical model aiming at minimizing dwell time of through trains at two adjacent district stations, and then converted this into a network flow model to which is added a source and a sink node.Then, we propose a new algorithm for solving the network flow model based on the minimum-cost flow algorithm.A case study for through trains from the Guiyang South Railway Station to the Chongqing West Railway Station shows that the algorithm is reliable and efficient for solving the problem of through train connections, and there is a reduction in the total dwell time that the through trains spend at two adjacent district stations.     

基于AHP的公共自行车站点选址的模糊综合评判

为了有效地解决公共自行车站点选址问题,首先分析和总结公共自行车站点选择时需要考虑的各种影响因素,运用ISM建立解析结构模型,并得到相应的评价指标体系;然后,引入层次分析法（AHP）并利用判断矩阵确定各指标要素的权重;最后运用模糊评判法对杭州＂德胜社区＂设置站点的优劣进行评价,根据隶属程度,评价在该位置设立公共自行车站点的适合程度并验证该评价方法体系的有效性和可靠性。这项研究能够为城市新建公共自行车站点提供科学可靠的决策依据。     

中国铁路发展规划与建设实践

在总结中国铁路发展所面临历史机遇的基础上,指出铁路的发展目标和战略规划。针对客运专线和铁路客站两方面剖析中国铁路规划与实践：前者探讨了以“四纵四横”为骨架的客运专线网络、主要城市群快速城际客运系统;后者提出铁路客站建设应重视功能、系统、先进、文化、经济5个方面的要求。介绍了北京市铁路枢纽规划采用的多客站模式,以北京南站为例,从功能需求、建筑特色、人性化服务、节能环保方面阐述其规划建设特点。最后,指出铁路客运专线和客站对经济社会和人们生活方式产生的深远影响。     

城市轨道交通车站站台行人交通特性

为了确定城市轨道交通车站站台行人交通特性,以北京市地铁2号线西直门站站台视频资料为基础,观测站台区域行人交通行为,分析行人速度、候车位置分布、密度时空分布特性。分析结果表明：与街道环境相比,站台区域行人自由流速度均值偏高,且站台与楼梯邻接区域行人速度随密度的增大下降较快;车辆到达之前行人候车呈队列形式,车辆到达后呈扇形分布在车门两侧;站台区域行人密度时空分布受轨道交通车辆班次影响,表现出规律性波动变化。     

A model for the layout of bike stations in public bike‐sharing systems

The problem of designing a layout of bike stations for public bike‐sharing systems entails selecting a number of stations and then constructing them within a planning area having many bike traffic zones and candidate bike stations. In this paper, we proposed a mathematical model to formulate the layout of public bike stations with the objective of minimizing users' total travel time and investment budget constraints. The model can guarantee that the needs for picking up and dropping off bikes amidst all bike travel demands are satisfied. Using this model, the number and locations of bike stations and the number of bikes and parking lockers at each bike station can be simultaneously determined. A typical example solved by lingo solver is created to illustrate the proposed model. Copyright © 2015 John Wiley & Sons, Ltd.     

Locating refuelling stations for alternative fuel vehicles: a review on models and applications

The recent concerns on environmental issues have expedited the technological development of alternative fuel vehicles (AFVs), but the deployment of AFVs still remains at the initial stage mainly because of the lack of refuelling facilities. Recognising this, researchers have conducted various studies, proposing a variety of approaches to strategically locating refuelling stations. This paper presents a comprehensive review of the approaches, focusing more on applications than computational issues. The review identifies two main elements of the approaches: location modelling and refuelling demand estimation. Examining how the elements were handled in refuelling location studies, this paper suggests that future refuelling location models should properly reflect the intricate and various perspectives of three major AFV stakeholders: drivers, government agencies and refuelling service providers. This study is expected to help researchers efficiently set up their refuelling location problems and identify critical factors for seeking the solutions.