铁路小件货物快运产品开行方案研究

随着我国铁路小件货物快运市场的需求日益增长,为了提高铁路小件货物快捷运输产品的市场竞争力,需要提供多等级的小件货物快捷运输服务,并配套相应产品的开行方案.文中以京广通道为例,提出在该通道上组织3种速度等级的小件货物快运产品———高速行邮专列、特快行邮专列、行包专列,并制定了该通道2015年的小件货物快运产品开行方案.     

前言

基于RP(Revealed Preference)和SP(Stated Preference)调查数据，利用潜在类别模型对高铁旅客进行细分，得到旅客对平行车次不同服务属性，如列车运行时间、发车时段和舒适度的偏好程度，并对其进行量化；引入收益管理，以多列车整体收益最大为目标，构建平行车次动态差别定价模型，并设计模拟退火算法进行求解；最后，通过京沪高铁进行实例验证.结果表明：与固定票价进行客票销售相比，所提方案能够适应高峰期和平峰期不同客流特点，提高铁路客票总收益，为高铁平行车次灵活定价提供参考.     

满足客运专线预制梁通行的隧道扩孔研究

研究目的:根据哈大客运专线施工组织安排,大连附近的2座短隧道断面因通行运梁车而需扩孔,因此需要对扩孔隧道断面内轮廓的确定及施工工艺进行深入研究,以解决扩孔隧道的设计施工的关键技术问题。研究结果:针对国内客运专线隧道工程首次考虑运梁车通行的工程需要,探索出了一条有针对性的扩孔隧道设计施工思路。     

旅客列车有害生物防治工作质量保证体系建设探讨

旅客列车有害生物防治工作是保障旅客旅行卫生安全、提高铁路客运服务质量、提升铁路企业形象的重要环节。乌铁局疾病预防控制所在多年从事旅客列车有害生物防治工作实践中,建立起了由安全管理、质量控制、达标考核、后勤保障等项内容组成的质量保证体系。但体系建设、标准建设和系统间的衔接还有待于进一步完善和加强。     

瑞士联邦铁路客运车队的机车车辆

瑞士联邦铁路(SBB)现有客运车队的机车车辆类型极多,除了现代大功率机车、摆式列车、低地板车辆和客车外,还包括在这期间作了改进的旧系列机车车辆.今后的采购政策首先是购置新的区间列车.     

直达特快列车机车的维修--均衡维修

针对直达特快列车的特点,指出了现行机车维修方式的不适应性,提出了可以提高机车车辆可用性、降低寿命周期费用、保证可靠性的新思路。阐述了均衡维修的相关问题     

集装箱班列编组计划优化模型研究

在总结分析普通货物列车编组计划编制的研究成果和经验的基础上，根据集装箱班列开行特点，建立集装箱班列编组计划的整数0—1线性规划模型，为铁路集装箱运输组织提供一定的理论借鉴。     

铁路集装箱中心站班列编组方案数学模型

针对已开通运营的铁路集装箱中心站相继开行诸多集装箱班列的实际,构建了集装箱班列编组方案选优的数学模型.该模型是在借鉴已有列车编组计划优化模型的基础上,根据其运输组织的特点,建立了在路网情形下,考虑了包括车站班列中转改编能力储备约束和区段牵引定数限制因素在内的单组班列编组方案选优的数学模型.该模型将一支集装箱箱流可能需要二次及其以上中转改编问题转变为多次一站中转改编问题来描述.因而,该模型复杂度大为降低,且为线性0-1规划模型,决策变量规模为2n3 - 5n2+3n.因而,该模型可以应用现有较为成熟的线性规划算法进行求解.另外,该文还运用模型实例来说明该模型对实际问题的有效描述.     

The use of dynamic programming in optimally allocating funds for highway safety improvements

An integrated system approach to traffic accident countermeasure selection is presented. This approach draws primarily upon the resources of a computerized accident records system for identifying high accident locations. Once high accident locations are identified by type, local investigations of these locations are conducted producing standardized cost and benefit data. These data are processed through a dynamic programming algorithm to produce optimal policies for implementation. Since this system has been in operation in two states in the United States for about five years, it should be of special interest to practitioners.     

Sensitivity of train stochastic dynamics to long-term evolution of track irregularities

The influence of the track geometry on the dynamic response of the train is of great concern for the railway companies, because they have to guarantee the safety of the train passengers in ensuring the stability of the train. In this paper, the long-term evolution of the dynamic response of the train on a stretch of the railway track is studied with respect to the long-term evolution of the track geometry. The characterisation of the long-term evolution of the train response allows the railway companies to start off maintenance operations of the track at the best moment. The study is performed using measurements of the track geometry, which are carried out very regularly by a measuring train. A stochastic model of the studied stretch of track is created in order to take into account the measurement uncertainties in the track geometry. The dynamic response of the train is simulated with a multibody software. A noise is added in output of the simulation to consider the uncertainties in the computational model of the train dynamics. Indicators on the dynamic response of the train are defined, allowing to visualize the long-term evolution of the stability and the comfort of the train, when the track geometry deteriorates.