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A reservations-based railway network operations management system.

机译:基于预订的铁路网络运营管理系统。

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摘要

A shipment scheduling and operational control method is developed and tested, to help railroads become more competitive for high revenue, service sensitive freight. A bid-price based, profit maximizing revenue management approach is proposed to allow a rail carrier to develop achievable and market sensitive quotations of delivery time far new shipments calling in. Bid prices are derived using a subgradient step size algorithm; a modified shortest path procedure is used to solve the decomposed subproblems.; Once the service quotation has been developed, a deterministic, cost minimizing, multicommodity network flow model, including train capacity and integral flow constraints is solved to manage shipments moving on the railroad in real time. This model dynamically reroutes shipments to take advantage of all available train capacity in the network, while still meeting the committed delivery times on priority shipments. A customized dual ascent procedure, using a tabu search approach as an anti-cycling mechanism, adapts the previous solution any time new information is received.; Both procedures have been integrated into a rolling horizon simulation model. Simulation results indicate up to a 10 point improvement in railway operating ratio may be achievable through implementation of this shipment management strategy.
机译:开发并测试了货运调度和运营控制方法,以帮助铁路在高收入,对服务敏感的货运方面更具竞争力。提出了一种基于投标价格,利润最大化的收益管理方法,以使铁路承运人能够开发出可到达的且对市场敏感的交货时间报价,远远超过新进货的报价。投标价格是使用次梯度步长算法得出的;修改后的最短路径程序用于解决分解后的子问题。一旦制定了服务报价,就可以解决包括火车容量和整体流量约束在内的确定性,成本最小化的多商品网络流量模型,以实时管理在铁路上行驶的货物。该模型动态地重新安排货运路线,以利用网络中所有可用的列车容量,同时仍然满足优先货运的承诺交货时间。一种定制的双重上升程序,使用禁忌搜索方法作为一种反循环机制,每当接收到新信息时,就会适应以前的解决方案。两种程序都已集成到滚动层仿真模型中。仿真结果表明,通过实施这种货运管理策略,可以将铁路运营率提高多达10个百分点。

著录项

  • 作者

    Kraft, Edwin, Reese.;

  • 作者单位

    University of Pennsylvania.;

  • 授予单位 University of Pennsylvania.;
  • 学科 Engineering System Science.; Transportation.; Economics Theory.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 293 p.
  • 总页数 293
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 系统科学;综合运输;经济学;
  • 关键词

  • 入库时间 2022-08-17 11:48:42

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