铁路的长期经济影响:基于中国1980年铁路线的研究

铁路与经济发展之间的关系得到了大量的研究,但均集中于短期经济影响,且很少关注铁路在发展中国家从传统农业社会向工业社会转型过程中的作用。文章使用中国1980年的铁路线研究了铁路在中国转型期对县域经济发展的长期影响。研究发现,铁路开通对县域经济发展具有显著的长期促进作用,具体来说,以2000年数据为例,1980年铁路线对以GDP为衡量指标的经济发展的年均促进作用为1.16%。排除了无法观测因素和溢出效应、控制县级异质性、以及使用"三线建设"作为外生冲击的结果均支持上述结论。机制检验发现,铁路促进了县域层面的工业化,同时还显著增加了县域层面的外商投资和出口,进而促进了经济发展。本文的研究不仅提供了铁路的长期经济影响的经验证据,同时也揭示了以铁路为代表的基础设施对经济转型的作用,从而有助于理解中国经济增长奇迹,也为其他发展中国家转型提供了借鉴。     

铁路三线大桥帽梁无支架法施工技术及受力检算

帽梁施工采用无支架法施工相对满堂支架法施工而言,具有施工简便,对地面承载力无要求,节约大量钢管,降低施工成本,缩短工期等优点。文章针对洛湛铁路旺甫1号三线大桥设计出穿心棒无支架法施工帽梁的支撑系统方案,成功地解决了三线大桥因帽梁砼重量大、跨度长而致使常用材料不适合做承托梁的问题,并对支撑系统进行了受力检算。     

中国高速铁路客运产品设计

以形成完整的中国高速铁路客运产品设计方法体系为目标，从分析客运产品层次及要素出发．提出客运产品设计原则与总体思路。研究客运产品的设计方法，从可达性、时效性、便捷性和经济性四方面研究列车开行方案设计及调整，从自助式、人性化、差异化等六方面研究服务产品设计，并提出中国高速铁路品牌战略。     

沪通铁路建设背景下的南通区位形势及交通行业影响预测

沪通铁路建设的帷幕在南通提出加快沿江沿海开发和建设长三角北翼经济中心的背景下正式拉开。沪通铁路工程将对南通地方交通格局及交通运输行业形成重要影响。文章将首先对南通地方交通体系的历史和现状作简要陈述,在此基础上,围绕沪通铁路的建设对完善南通地方交通体系格局的作用展开分析,然后就该工程对南通地方交通行业的影响作综合分析和预测。     

Modeling cascade dynamics of railway networks under inclement weather

Understanding the cascade dynamics of delay propagation under inclement weather is crucial to proactive railway management. In this paper, we proposed a Switching Max-Plus System (SMPS) to model the delay propagation on railway networks, which extends the conventional MPS by incorporating multiple system matrices to capture the dynamic impacts of inclement weather. An algorithm based on the All-Paired Critical-Path (APCP) graph was developed to solve the SMPS, which calculates secondary delays without backtracking the precedent events. The proposed model and its solution algorithm were validated using discrete-time simulations on both artificial and empirical networks. The robustness of railway services was also analyzed using the concepts of vulnerability and diffusivity.     

A direct comparison of physical block occupancy versus timed block occupancy in train timetabling formulations

Two fundamental mathematical formulations for railway timetabling are compared on a common set of sample problems, representing both multiple track high density services in Europe and single track bidirectional operations in North America. One formulation, ACP, enforces against conflicts by constraining time intervals between trains, while the other formulation, RCHF, monitors physical occupation of controlled track segments. The results demonstrate that both ACP and RCHF return comparable solutions in the aggregate, with some significant differences in select instances, and a pattern of significant differences in performance and constraint enforcement overall.     

George Hudson's financial reporting practices: putting the Eastern Counties Railway in context

George Hudson was the most important railway promoter of his time. He had a particular aptitude for visualizing and arranging spectacular company and line amalgamations and his activities helped to bring about the beginnings of a more modern railway network. In 1849 he exercised effective control over nearly 30 per cent of the rail track then operating in the UK, most of it owned by four railway groups, the Eastern Counties Railway, the Midland, the York, Newcastle and Berwick, and the York and North Midland, before a series of scandalous revelations forced him out of office. The economic, railway and accounting literatures have treated George Hudson as an important figure in railway history, although concentrating largely on the financial reporting malpractices of the Eastern Counties Railway, while Hudson was its chairman, which were incorporated into the influential Monteagle Committee Report of 1849. Relatively little attention has been paid, however, to events at Hudson's other major companies. This paper analyzes the available evidence, particularly that produced by the Committees of Investigation established at all four railway groups, in order to provide a more balanced assessment of George Hudson's approach to financial reporting and thereby place events at the Eastern Counties Railway in a broader context.     

加快推进呼和浩特铁路局多元经营在华北地区集疏运系统建设的思考

介绍了呼和浩特铁路局集疏运系统建设情况,提出了呼铁局在华北地区集疏运系统建设的改进与调减建议,从而为该局的物流业发展提供了指导作用。     

An assessment of railway capacity

In this paper, we review the main concepts and methods to perform capacity analyses, and we present an automated tool that is able to perform several capacity analyses. Capacity is extremely dependent on infrastructure, traffic, and operating parameters. Therefore, an in-depth study of the main factors that influence railway capacity is performed on several Spanish railway infrastructures. The results show how the capacity varies according to factors such as train speed, commercial stops, train heterogeneity, distance between railway signals, and timetable robustness.     

高速铁路对居民消费的空间溢出效应研究

高速铁路开通对居民消费发展具有重要影响。本文基于2003-2017年的省级面板数据,利用空间杜宾模型检验了高速铁路对居民消费的空间溢出效应。结果表明:(1)我国居民消费存在明显的空间集聚特征;(2)周边地区的高铁运营对本地区的居民消费水平有促进作用,但二者并非简单的线性关系,高速铁路对我国居民消费水平的影响呈倒U型;(3)周边地区高铁通过影响当地经济发展水平和旅客周转量来促进当地居民消费水平提升。为此,我国需要充分利用居民消费的空间依赖性来改善各地区居民的消费,完善和优化现有的高铁网络,以高铁发展带动消费水平提升,为经济可持续发展提供适宜的消费环境。