石衡沧港城际铁路互联互通方案研究

突出功能定位,发挥路网互联互通作用,是高速铁路互联互通方案研究的关键。在阐述石衡沧港城际铁路互联互通现状的基础上,针对石衡沧港城际铁路客流特点和功能定位,分析石衡沧港城际铁路石家庄铁路枢纽、衡水铁路枢纽、沧州铁路枢纽和黄骅铁路枢纽等互联互通主要节点枢纽,通过衡水、沧州和黄骅铁路枢纽比选方案分析,提出石衡沧港城际铁路在通道中的枢纽方案,为区域连接线、城际铁路在方案互联互通作用提供研究支撑。     

What hurts the dominant airlines at hub airports?

This paper estimates a frequency equation to explain the determinants of network airline service levels at their hub airports. Drawing on European data for 2002–2013, we find that network airlines reduce frequencies when the share of low-cost airlines increases both on the route and at the hub airport. On the contrary, frequency choices of network airlines are not affected by competition from low-cost airlines operating in nearby secondary airports. We also find some evidence that mergers in Europe may result in a re-organization of the route structure in favor of the hubs of the larger airline.     

The role of London airports in providing connectivity for the UK: regional dependence on foreign hubs

In a context of ongoing debate about the future UK aviation policy and its implications for regional economic development, this paper discusses the role of London Heathrow and the South East airports in providing connectivity for the UK, with particular focus on the international markets that originate from regional UK airports. Using an MIDT dataset of worldwide passenger itineraries served by the European airport network during May 2013, we first establish whether London Heathrow can currently be considered the most important hub for the UK, in terms of traffic generation, connectivity, and centrality, while also measuring the dependence of UK regions on foreign airports and airlines to remain connected with the rest of the world. Results show that, despite the competition, London Heathrow benefits from its massive traffic generation to remain the most central gateway for overall UK air transport markets. However, when only regional markets are considered, significant dependence on foreign hubs appears in many destinations, particularly to Asia–Pacific or the BRIC countries where above 80% of passengers use transfer flights. These results fit nicely with the observed trends of seat de-concentration and hub-bypassing in the airline industry. While dependence on foreign hubs can be interpreted as a sign of vulnerability, there is also the argument that bypassing Heathrow allows regional airports to develop new markets and reduce the level of congestion in the London airport system.     

中交哈大高速铁路施工团队管理与激励的研究

本文的研究方法和结论能够提升中交哈大项目团队的经营业绩,成功实现中交集团内部及外部的有效沟通,促使中交集团机构重组的顺利完成。本文的相关研究成果与结论不仅对中交哈大高速铁路施工项目团队管理及激励机制的建设和完善有借鉴作用,而且对于其他建筑施工企业的项目团队管理也具有一定的参考作用。     

Hub location problems in transportation networks

In this paper we propose a 4-index formulation for the uncapacitated multiple allocation hub location problem tailored for urban transport and liner shipping network design. This formulation is very tight and most of the tractable instances for MIP solvers are optimally solvable at the root node. While the existing state-of-the-art MIP solvers fail to solve even small size instances of problem, our accelerated and efficient primal (Benders) decomposition solves larger ones. In addition, a very efficient greedy heuristic, proven to be capable of obtaining high quality solutions, is proposed. We also introduce fixed cost values for Australian Post (AP) dataset.     

我国铁路基础设施噪声的边际成本定价方法研究

通过概述国内外学者关于运输外部性内部化政策、运输外部性评估、运输外部成本计算方法等方面的研究成果,阐述了美国及欧盟寻求实现运输外部成本内部化的政策和方法。针对我国铁路基础设施噪声污染问题,在分析铁路噪声的产生、传播及估算的基础上,研究提出利用边际成本定价方法计算铁路噪声边际成本。噪声定价方法还有支付意愿法、冲击路径法等,这些定价方法及其实证量化还有待进一步深入研究。     

基于粗糙主成分分析法的铁路网客运节点重要度决策

通过阐述铁路网客运节点的定义和节点重要度的概念,建立客运节点重要度评价指标体系,利用粗糙集理论与主成分分析法的结合,提出利用主成分分析法和基于信息量方法,计算客运节点的客观权重,结合主观权重得到科学合理的客运节点综合权重。经过实例分析,表明了基于粗糙主成分分析法的客运节点评判结果的有效性。     

铁路专用线噪声调查与预测特点分析

铁路专用线与国铁相比具有线路长度较短、技术标准较低、运输密度较小等特点。在分析铁路专用线噪声特点的基础上,提出铁路专用线应选取等效声级为噪声评价量,在采用模式预测法进行铁路专用线噪声预测时,应关注各主要修正参数,为科学、客观评价专用线噪声提供依据,同时以某铁路专用线为例进行噪声分析。     

华俄道胜银行及其在华发行货币考略

华俄道胜银行建立于1895年,名为"中俄合办",实为俄法合办而由沙俄直接控制的侵略和掠夺中国的工具,是沙俄设在中国的殖民地银行.该行在中国存在30余年,干尽了侵略、掠夺、剥削中国人民的罪恶勾当.     

高速铁路动车组检修资源布局优化研究

高速铁路网的日趋完善,高速列车开行数量的进一步增加,对高速铁路动车组检修资源布局提出新的要求。为合理优化动车组检修资源布局,提高动车组检修效率,在分析我国动车段和动车运用所管理模式及布局方案的基础上,将动车组检修资源布局优化问题转化为基于多基地车辆路径运用的基地选址问题,基于"备选运用所-运输需求-动车组运用"间的关联关系构建动车组运用检修接续网络,建立动车组检修资源布局优化模型。以某区域的铁路网为例,利用近远期规划优化动车组检修资源布局,验证模型有效性,为今后动车组检修资源布局优化提供参考。