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151.
Container vessel fleet deployment for liner shipping with stochastic dependencies in shipping demand
The problem of optimal container vessels deployment is one of great significance for the liner shipping industry. Although the pioneering work on this problem dates back to the early 1990s, only until recently have researchers started to acknowledge and account for the significant amount of uncertainty present in shipping demand in real world container shipping. In this paper, new analytical results are presented to further relax the input requirements for this problem. Specifically, only the mean and variance of the maximum shipping demand are required to be known. An optional symmetry assumption is shown to further reduce the feasible region and deployment cost for typical confidence levels. Moreover, unlike previous work that tends to ignore stochastic dependencies between the shipping demands on the various routes (that are known to exist in the real world), our models account for such dependencies in the most general setting to date. A salient feature of our modeling approach is that the exact dependence structure does not need to be specified, something that is hard, if not simply impossible, to determine in practice. A numerical case study is provided to illustrate the proposed models. 相似文献
152.
The container shipping industry faces many interrelated challenges and opportunities, as its role in the global trading system has become increasingly important over the last decades. On the one side, collaboration between port terminals and shipping liners can lead to costs savings and help achieve a sustainable supply chain, and on the other side, the optimization of operations and sailing times leads to reductions in bunker consumption and, thus, to fuel cost and air emissions reductions. To that effect, there is an increasing need to address the integration opportunities and environmental issues related to container shipping through optimization. This paper focuses on the well known Berth Allocation Problem (BAP), an optimization problem assigning berthing times and positions to vessels in container terminals. We introduce a novel mathematical formulation that extends the classical BAP to cover multiple ports in a shipping network under the assumption of strong cooperation between shipping lines and terminals. Speed is optimized on all sailing legs between ports, demonstrating the effect of speed optimization in reducing the total time of the operation, as well as total fuel consumption and emissions. Furthermore, the model implementation shows that an accurate speed discretization can result in far better economic and environmental results. 相似文献
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154.
欧洲集装箱内河运输经验借鉴 总被引:1,自引:0,他引:1
随着全球和区域经济网络的形成和发展,内河集装箱运输得到了迅猛发展,人们日趋认识到内河集装箱运输在集装箱多式联运体系中的重要价值和未来持续增长的潜力。为此,以欧洲集装箱内河运输经验为借鉴,对集装箱内河运输模式进行了分析,内容包括:内河集装箱发展演变特点、给予政府层面的集装箱内河运输推进模式等,在此基础上,对我国的内河集装箱运输,提出了若干建议。 相似文献
155.
介绍了集装箱电子标签的国内外发展概况及其应用示范的意义,同时介绍了集装箱电子标签系统的设计思路和关键技术,最后总结了集装箱电子标签系统的创新点。 相似文献
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158.
国际集装箱多式联运与东部港口竞争力分析 总被引:5,自引:0,他引:5
从北方中西部地区外贸货物国际集装箱多式联运的路径优化分析入手,分别通过对经上海、青岛和连云港转运的全程广义运输成本的估算,以及概率型交通量分配模型的应用,就我国东部港口之间的竞争力水平进行了实证研究。 相似文献
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根据运输的“范围经济性”原理,阐述了集装箱航运服务组合拍卖的适用性,围绕价值因素和价值评价因素,分析了集装箱航运服务组合拍卖的比较优势,结合集装箱航运服务的特点,以拍卖者效用最大化和投标者总估值最大化平衡为目标,设计出了组合拍卖的机制和运作程序;针对组合拍卖中的竟胜标问题,建立了集装箱航运服务组合拍卖的一般优化模型,并通过引入集装箱航运服务质量属性参数和运量限制等约束条件,对其进行了改进。从而为实现集装箱航运服务在线拍卖提供理论支持和计算平台。 相似文献