广州地铁三号线洛溪车辆段出入段线设计方案及能力分析

研究目的:地铁车辆段出入段线设计方案对地铁运营效率和成本有重大影响,广州地铁三号线在国内首次采用了3/6辆灵活编组替换运营的全新运营模式,对车辆段的出入段能力提出了更高的要求。对车辆段出入段线方案进行优化和能力分析研究不仅对广州地铁三号线车辆段设计具有重要意义,也可供其他地铁车辆段设计借鉴和参考。研究方法:通过对广州地铁三号线车辆段出入段线设计方案的比较分析,以及对推荐方案出入段能力的计算分析,研究设计方案的合理性和适应性。研究结论:在广州地铁三号线的用地和站段位置等限制条件下,经过优化的设计方案具备较强的优越性,能够满足三号线新运营模式的要求。     

大中型客车驱动桥主减速器总成柔性组装线工艺方案综述

主减速器总成组装工艺水平是影响驱动桥性能的重要因素。全面分析了主减速器总成组装工艺方案,精心策划了组装线布局,合理配置了在线检测系统。提升了产品质量,实现多品种共线柔性生产的要求。     

北京市小汽车交通发展研究

首先对北京市小汽车发展的历程进行了回顾,接着分析了现状和特点,并对北京市小汽车发展引发的诸多经济社会问题进行了反思。认为当前小汽车发展是超前消费,超过了经济发展速度,与城市化发展不协调,小汽车在交通出行结构中所占比例过高,加重了交通拥堵,给资源、环境造成了沉重的负担和影响。从可持续发展的理念出发,北京市小汽车发展的总体策略应该是：适量拥有、合理使用。政府管理部门要树立“公交优先”的思想,采取各种管理手段缓解交通拥堵,减少交通事故。     

布达佩斯城市交通发展战略与启示

分别从概况、战略目标、实施策略等3个方面对布达佩斯城市交通发展的总体战略及公共交通、道路网络、静态交通、步行及自行车交通、交通管理等发展战略进行了阐述。由此得出,居民出行线路上任何一种交通方式的低效都将破坏整个交通链的效率,只有整个交通链所有交通环节的和谐发展,才能够使公共交通在运输服务上较小汽车具有竞争力;只有综合利用公共交通与私人交通,才能使城市交通与土地利用相协调。最后,结合布达佩斯和国内实践经验,总结提出了一种包含人口、经济、地理、环境、技术、制度等要素的“六棱形”城市交通发展战略规划模型。     

城市轨道交通企业多元化发展对比研究

城市轨道交通投资周期长、成本高、收益见效慢,许多轨道交通企业负债累累,但随着城市轨道交通在我国的高速发展,越来越多的轨道交通企业开启多元化经营进而实现多元化发展。本文列举了四个我国典型大都市的轨道交通多元化发展情况,结合政府颁布的土地政策,可以看出轨道交通多元化发展的重要性,以及政府将土地交由轨道交通企业自行开发、使用,政府在其中主要充当监管者的角色。这样有助于实现其多元化经营,进而带动多元化发展与城市可持续发展。     

Towards a better management of urban traffic pollution using a Pareto max flow approach

Rising levels of air pollution is a major concern across many parts of the world. In this article, we develop a transportation policy to handle air pollution caused by the heavy flow of traffic in urban areas. In particular, we aim to distribute the traffic flow more evenly through a city, by developing a flow algorithm that computes multiple solutions, each of which accommodates the maximum flow. The paper makes the following contributions to build such a transportation policy: (a) Develops a Pareto-optimal Max Flow Algorithm (PMFA) to suggest multiple max flow solutions. (b) Introduces the notion of k-optimality into PMFA to ensure that the suggested pareto solutions are sufficiently distinct from each other – referred to as Pareto-k-optimal Max Flow Algorithm (k-PMFA). (c) Through a series of experiments performed using the well-known traffic simulator SUMO and by doing emission modeling on the New York map, we could show that our policy distributes the air pollution more uniformly across locations.     

Overview of maritime research publications by the late Professor Richard O. Goss

We lost one of the great maritime scholars in 2017—Professor Richard Goss, who is considered one of the founders of maritime economics. He was a pioneer and a most influential leader in establishing the discipline of maritime economics worldwide. This paper revisits his research by examining major issues and assessing his arguments by surveying empirical works that have been conducted after his works in the literature. His economic thoughts are based on laissez-faire, welfare economics, and Marshallian economics. Comparing his arguments with major findings in ensuing research, several research directions are suggested.     

Planning with vision: The development of traffic strategies for Melbourne

This paper describes an approach to the development of metropolitan transport strategies based on community needs and values. A search conference and other consultation methods were used to raise community awareness of transport issues and to give the transport planners an understanding of community concerns and values. The collective values were used to develop a vision statement of where Melbourne could be in the future. Transport strategies were then developed which helped achieve the vision. By this approach transport strategies can be integrated with the delivery of other services so that they are complementary and achieve consistent ends. The process encouraged community debate and helped strategy development to focus on what was to be achieved, rather than on particular techniques or interest group agendas. Integrated strategies which have wide interest group and community support can be developed by the process.     

复杂网络下 TOD 耦合机制 引导城市发展策略研究 ——以北京为例

TOD 被众多规划决策人员视为解决大城市供需问题的重要抓手,并以此为规划依据进行城市发展策略研 究。但在本土化的应用实践中,TOD 对空间引导、价值取向、技术变革、规划范式方面的作用影响需要进一步明 晰。以北京市为例,通过复杂网络特征测度识别市域区划层次下城市中心体系和轨道交通的空间耦合状态,指明 双系统现存规划建设问题,提出双系统在 TOD 模式下的多维度耦合策略,旨在培养 TOD 向城市发展政策转型, 推进城市健康可持续发展。