共查询到19条相似文献,搜索用时 889 毫秒
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客运专线通过能力计算探讨 总被引:2,自引:0,他引:2
对客运专线通过能力的计算特点进行分析,指出在追踪间隔时间一定的情况下,客运专线通过能力主要受不同速度等级列车的速差、停站时间、停站率,以及区间长度、综合维修"天窗"时间和设置方式等因素的影响,对主要影响因素分别进行进一步研究,得出客运专线通过能力的计算方法. 相似文献
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客运专线动车组列车重联运行相关问题探讨 总被引:1,自引:0,他引:1
为了提高客运专线的通过能力,基于动车组列车采用重联运行的特性,在分析国内外动车组列车运用现状的基础上,根据动车组列车重联运行的研究对象和扩能效果,研究动车组列车重联运行的适用条件,指出动车组列车重联运行需具备一定的到发线、作业时间、信号显示等条件,并在一定的安全保障措施下进行. 相似文献
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为准确识别不同运行组织因素对铁路能耗影响的重要程度,在解析各运行组织因素的基础上,建立灰色关联度分析模型,计算各运行组织因素对能耗的欧几里德灰色关联度。选取系统能耗为特征行为序列,运行组织各因素为影响因素行为序列,并以日本JR铁路为例,采集近10年的数据进行计算分析,得到铁路能耗影响因素的重要程度排序。 相似文献
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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。 相似文献
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在考虑检修的条件下,根据接续时间和接续地点,以动车组周转接续时间总和最小来表达动车组运用数量最少作为目标函数,建立动车组运用计划的数学模型,并采用模拟退火算法进行求解。以武广高速铁路的开行方案为基础进行仿真应用,表明在给定列车运行图后,采用该模型和求解算法能够得到优化的动车组运用计划。 相似文献
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我国高速铁路快速发展.高速铁路上运行的动车组如何实现节能降耗是铁路行业关注的热点和焦点问题。以上海铁路局高速铁路能源消耗情况为切入点,分析动车组能源消耗影响因素,并结合铁路实际,提出高速铁路动车组节能降耗的建议措施。 相似文献
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Yekang Ko Kitae Jang John D. Radke 《International Journal of Sustainable Transportation》2017,11(6):460-470
This study demonstrates the trade-offs between vehicle energy consumption and on-site solar energy potential in a city landscape. While higher urban density may curb many of the problems associated with sprawl mainly by reducing vehicle travels and associated energy use, it can also limit on-site rooftop solar energy utilization due to more shade on rooftops in dense urban settings and less available rooftop area per person. Using travel survey, Geographic Information System (GIS) and Light Detection and Ranging (LiDAR) data, we estimated vehicle energy use and rooftop solar potential in the City of San Francisco as a case study and calculated possible offsetting effects between vehicle energy consumption and rooftop solar potential. Given the prevalence of gasoline-based vehicles and today's solar photovoltaic (PV) panel efficiency, vehicle energy use per capita appears to exceed energy generated by rooftop solar PVs per capita across all density ranges, especially in lower density environments. At the point when electric cars and advanced, highly efficient solar PV panels penetrate the market, the results change based on the combination of different technological options. A significant reduction of energy consumption can be achieved through the immediate and rapid spread of energy efficient technologies in vehicles and solar PVs along with the long-term effect from gradual urban densification. 相似文献
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The objective of this research is to reduce energy consumption from intra airport shuttle operations by optimizing routes and schedules, without compromising on passenger travel experience. To achieve this objective, we propose an optimization model that generates optimal airport shuttle routes for a given set of constraints and a discrete-event simulator that evaluates the optimal shuttle routes in a stochastic environment to understand the tradeoffs between the amount of time passengers wait for shuttles, and shuttle energy consumption. The proposed optimization model and stochastic simulation are tested using shuttle route data provided by the Dallas Fort Worth International Airport. Results indicate that optimized routes can lead to a 20% energy reduction in shuttle operations with a modest 2-min increase in average shuttle wait times. The optimization model and simulator presented here are designed to be generalizable and can be adapted to optimize shuttle operations at any major airport. 相似文献