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Inefficient road transportation causes unnecessary costs and polluting emissions. This problem is even more severe in refrigerated transportation, in which temperature control is used to guarantee the quality of the products. Organizing logistics cooperatively can help decrease both the environmental and the economic impacts. In Joint Route Planning (JRP) cooperation, suppliers and customers jointly optimize routing decisions so that cost and emissions are minimized. Vendor Managed Inventory (VMI) cooperation extends JRP cooperation by optimizing routing and inventory planning decisions simultaneously. However, in addition to their economic advantages, VMI and JRP may also yield environmental benefits. To test this assertion, we perform a case study on cooperation between a number of supermarket chains in the Netherlands. The data of this case study are analyzed to quantify both the economic and environmental benefits of implementing cooperation via JRP and VMI, using vehicle routing and an inventory routing models. We found that JRP cooperation can substantially reduce cost and emissions compared with uncooperative routing. In addition, VMI cooperation can further reduce cost and emissions, but minimizing cost and minimizing emissions no longer result in the same solution and there is a trade-off to be made. 相似文献
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池洁 《重庆交通大学学报(自然科学版)》2004,23(Z1):102-104
针对生产商在生产计划中所面临的诸多问题,如:交货周期不同、库存容量和生产资金的限制等.从生产过程中的成本管理的极小化的目标出发,采用动态规划的方法,建立针对上述问题的数学模型,并求最优策略. 相似文献
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In this paper we describe the methods used to develop the open source Aviation Emissions Inventory Code and produce a global emissions inventory for scheduled civil aviation, with quantified uncertainty. We estimate that in 2005, scheduled civil aviation was responsible for 180.6 Tg of fuel burn, which agrees to within 4% of other published emissions inventories for 2004 and 2006. By comparing the Aviation Emissions Inventory Code with flight data records, we show that the mean bias in predicted fuel burn at the airport-pair level is +1% for an ensemble of 132 flights, and less than 10% for 5 of the 6 aircraft types used in the validation. 相似文献
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Oracle作为一种大型数据库,以性能优越、可靠性高、安全性好以及分布式处理能力强等特点,在TMIS建设中得到广泛应用.因此,管理好Oracle数据库是系统管理员的一项重要工作.以现车管理信息系统为例介绍Oracle数据库的优化措施. 相似文献
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介绍了新近研制成功的客运站现车管理系统的设计方案、实施办法、功能特点及现场使用情况.该系统可直观、快捷地编制钩计划和快速、智能地管理客车编组,是实现客站现车管理装备现代化的重要设备之一. 相似文献
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介绍包神铁路车号自动识别系统(ATIS)车号扫描在地方铁路现在车管理方面的应用,给出系统间的工作模式. 相似文献