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Network design for time-constrained delivery.

機譯:網(wǎng)絡(luò)設(shè)計用于時間受限的交付。

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摘要

To meet customer demand, delivery companies are offering an increasing number of time-definite services. In this study, we examine the strategic design of delivery networks which can efficiently provide these services. Because of the high cost of direct connections, we focus on tree-structured networks. As it may not be possible to identify a tree-structured network that satisfies all of the delivery guarantees, we allow these guarantees to be violated and use the violations as a measure of cost, such that the objective is to minimize the violations in the network.;Two measures of violations are studied, the maximum of the violations and the sum of the violations. Further, as the problem is characterized by a series of parameters which can represent distance, flow volume, and delivery deadlines, we derive different problem variants through variations in these problem parameters. We present both theoretical results on the complexities of these variants and computational results for the developed solution techniques for these variants as well as valuable managerial insights.;We extend the study on tree-structured networks to subgraph-structured networks to further reduce violations. We explore the complexities of these subgraph network design problems. New solution methods are proposed to solve the problems building on the results from the study of the tree-structured networks.
機譯:為了滿足客戶需求,送貨公司提供了越來越多的限時服務(wù)。在這項研究中,我們研究了可以有效提供這些服務(wù)的交付網(wǎng)絡(luò)的戰(zhàn)略設(shè)計。由于直接連接的成本很高,因此我們專注于樹形結(jié)構(gòu)的網(wǎng)絡(luò)。由于可能無法確定一個滿足所有交付保證的樹狀網(wǎng)絡(luò),因此我們允許違反這些保證并將違規(guī)行為用作成本度量,以便目標是最大程度地減少網(wǎng)絡(luò)中的違規(guī)行為。;研究了兩種違規(guī)措施,最大違規(guī)和違規(guī)總數(shù)。此外,由于問題的特征在于可以代表距離,流量和交貨期限的一系列參數(shù),因此我們可以通過這些問題參數(shù)的變化得出不同的問題變體。我們既提供了有關(guān)這些變量的復雜性的理論結(jié)果,也提供了針對這些變量的已開發(fā)解決方案技術(shù)的計算結(jié)果,以及有價值的管理見解。;我們將樹結(jié)構(gòu)網(wǎng)絡(luò)的研究擴展到了子圖結(jié)構(gòu)網(wǎng)絡(luò),以進一步減少違規(guī)情況。我們探索這些子圖網(wǎng)絡(luò)設(shè)計問題的復雜性。提出了新的解決方法來解決基于樹結(jié)構(gòu)網(wǎng)絡(luò)的研究結(jié)果的問題。

著錄項

  • 作者

    Chen, Hui.;

  • 作者單位

    The University of Iowa.;

  • 授予單位 The University of Iowa.;
  • 學科 Engineering Industrial.;Transportation.;Operations Research.
  • 學位 Ph.D.
  • 年度 2008
  • 頁碼 163 p.
  • 總頁數(shù) 163
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類 一般工業(yè)技術(shù);綜合運輸;運籌學;
  • 關(guān)鍵詞

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