基于公交枢纽导向的新城区土地利用模式

本文基于新城区的特点,将公交枢纽导向发展理念引入新城区土地利用模式中,提出了新城区交通与土地协调发展的规划思路,探讨了枢纽区域宏观布局、微观选址的规划方法。并对枢纽区域的土地利用模式提出了新的思路。研究结果表明：基于公交枢纽导向发展模式的规划方法是新城区土地利用规划的一种理想模式。     

Effect of open skies in the Middle East region

This research aims to estimate potential inter-regional passenger flows for air transport in the Middle East under open skies polices, once deregulation agreements are reached between neighboring countries. To arrive at reasonable demand estimates, Western and Eastern European demand data was analyzed as a first step, since it is assumed that current Middle Eastern demand is distorted as a direct result of regional political instability. The major factors affecting demand, based on the European dataset, included population size, gross domestic product (GDP) per capita, absolute difference in GDP per capita between two countries, great circle distance and membership of the European Union and World Trade Organization. Subsequently, a 21 country database was estimated for passenger flow in the Middle East region on an average peak season day. The demand estimations became input for a hub location model (p-hub median formulation) in order to achieve the second major aim of this research, objective identification of potential regional gateways. The results proved robust to both single and multiple allocation model assumptions, with Cairo and Tehran consistently achieving hub status, along with Istanbul and Riyadh, as the number of potential hubs increased. Finally, this research shows that under conditions of peace, given existing socio-economic indicators, inter-regional passenger demand flow could increase by upwards of 51% and regulatory authorities ought to consider the necessary infrastructure and demand management policies to enable the conservative regional demand growth estimated.     

城市客运交通枢纽预警分级阈值简析

交通枢纽作为服务于公共交通之间以及公共交通与其它交通方式之间客流转换的场所,是改善整个交通系统,提高居民出行效率、解决出行换乘等问题的重要影响因素。本文结合东直门综合运输枢纽信息服务平台工程,采集枢纽客流进出量,总结客流统计规律,对东直门交通枢纽预警分级阈值进行简析,相关研究成果可为交通枢纽预警分级阈值分析提供参考。     

基于DEA的公交枢纽评价分析研究

公共交通枢纽作为公共交通中的关键环节,其运营好坏将对公共交通系统产生重要影响,为此从定量和定性角度建立公共交通枢纽评价体系,采用基于DEA的层次评价模型进行评价,评价过程中,判断矩阵的获得是通过DEA模型得到,减少了主观性对枢纽评价精度影响。并选用四个枢纽进行实例分析,通过结果分析可以发现枢纽在公交服务水平、枢纽布局以及枢纽发展潜力方面的不足。     

美国一级铁路公司UP与快递物流公司Hub的合作研究

美国一级铁路公司UP与快递物流公司Hub的合作是美国发展多式联运的成功案例之一.从UP与Hub的合作背景、合作措施和合作效果等3个方面对二者的合作案例展开分析.从合作的行业背景来看:美国对铁路运输管制政策的放松推动了市场竞争;铁路运输虽然具有运量大、能耗低、安全性高等优势,但无法提供"门到门"的运输服务;公路运输虽然灵...     

南京枢纽新建南京北动车所的必要性及整体布局方案研究

针对国内在新建高速铁路枢纽内,动车组配属及承担动车段(所)动车组检修工作量、检修设施规模的测算结果中表现出的不统一、不协调及不匹配等问题,本文以新建南京枢纽南京北动车所工程项目为依托,研究确定枢纽内动车组配属规模设计、承担动车段(所)动车组检修工作量及检修设施规模测算理论,提出了以全周转时间及日车公里法为指标的2种枢纽内动车组配属规模测算方法。研究表明：采用日车公里法测算,当枢纽内动车组平均日走行公里指标取常见经验计算值2 000 km时,在不考虑检修动车组数量前提下计算的运用动车组数量及备用动车组数量比全周转时间测算法计算结果偏大约41%,配属动车组数计算结果偏大约20%,动车组存车线数及检查库线数计算结果偏大约35%,计算枢纽内动车组配属、承担动车段(所)动车组检修工作量及检修设施规模测算裕量较为充足。     

太原铁路枢纽高铁供电运行探讨

随着太原铁路枢纽融入高速铁路网,枢纽内高铁列车数量大量增加,但枢纽内高铁接触网仍由榆次变电所、太北变电所这两座既有普速铁路牵引变电所供电。为保证高铁的供电可靠性,结合太原铁路枢纽内线路及牵引供电设施布置,分析在牵引变电设备各种故障情况下如何快速恢复供电。在榆次或太北牵引变电所发生全所停电故障时,对几个可以实现的越区供电方案进行供电能力计算和比较,提出推荐的越区供电方案。通过良好的供电故障恢复方案,能极大地提高太原铁路枢纽内供电故障恢复速度和高铁列车供电的可靠性。     

Effects of high-speed rail and airline cooperation under hub airport capacity constraint

This paper analyzes the effects of cooperation between a hub-and-spoke airline and a high-speed rail (HSR) operator when the hub airport may be capacity-constrained. We find that such cooperation reduces traffic in markets where prior modal competition occurs, but may increase traffic in other markets of the network. The cooperation improves welfare, independent of whether or not the hub capacity is constrained, as long as the modal substitutability in the overlapping markets is low. However, if the modal substitutability is high, then hub capacity plays an important role in assessing the welfare impact: If the hub airports are significantly capacity-constrained, the cooperation improves welfare; otherwise, it is likely welfare reducing. Through simulations we further study the welfare effects of modal asymmetries in the demands and costs, heterogeneous passenger types, and economies of traffic density. Our analysis shows that the economies of traffic density alone cannot justify airline–HSR cooperation.     

汽车轮毂轴承失效模式分析及性能提升

轮毂轴承是汽车非常重要的安全部件,本论文列举某车型路试过程中轮毂轴承单元失效的问题进行分析,针对其失效的原因采取相应轴承性能提升的措施。     

集满铁路引入集宁铁路枢纽方案研究

集满铁路主要承担蒙古国塔本陶勒盖煤矿至中国河北及以远地区的煤炭运输,引入集宁铁路枢纽有利于集宁地区铁路运输网络的完善和发展。通过阐述集宁铁路枢纽内在建和规划项目,结合集满铁路运量预测分析,根据集宁地区既有站现状、货物运输通道及方向等情况提出3个接轨点方案,即芦家村站接轨方案、庙梁站接轨方案和三岔口站接轨方案,通过从线路长度、方案工程难易和工程总投资等方面进行综合比选,推荐采用芦家村站接轨方案,为集满铁路引入集宁铁路枢纽提供借鉴。