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61.
Growing importance of intermodal transportation necessitates modeling and solving load planning problems by taking into account various complex decisions simultaneously like transportation mode/service type selection, load allocation, and outsourcing. This paper presents a mixed-integer mathematical programming model for a multi-objective, multi-mode and multi-period sustainable load planning problem by considering import/export load flows to satisfy transport demands of customers and many other related issues. Several multiple objective optimization procedures are utilized in order to handle conflicting objectives simultaneously under crisp and fuzzy decision making environments. A real-life case study is also performed to present application and usefulness of the proposed model. 相似文献
62.
The extent to which tourism destination marketing narratives with different themes influence readers by imaginatively ‘transporting’ them is quite varied. This study investigates the different degrees of influence such narratives have on destination image and the intention to visit, exploring how the intensity of readers' experiences of being transported by narratives with different themes can influence their intention to visit the places described. Our results reveal the extent to which different narrative themes affect destination image and significantly influence readers' intention to visit. The extent to which narratives with different themes make readers feel transported also has a significant moderating effect on their intention to visit. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
63.
夯实基础 实现铁路运输安全长治久安 总被引:3,自引:1,他引:3
总结了铁路运输安全5年来创造的历史最好成绩,主要是设备质量大幅度提升,科技保障安全能力大大增强,职工队伍素质不断提高。为了做好2003年和今后一个时期的安全工作,提出必须与时俱进,开拓创新,遵循科学管理,实现铁路运输安全长治久安。 相似文献
64.
This paper presents a methodology to identify when freight consolidation strategies are cost-efficient in the less-than-truckload carriers operations. Shipments are assigned based on proximity and cost criteria to build an initial long-haul shipment solution. This initial solution is later improved by the implementation of Tabu Search algorithm. The proximity criterion takes into account the spatial distribution of shipments loads among centers. The results show that the proposed methodology may reduce the transportation cost by 20% compared to the solution of those heuristics only considering cost criterion. 相似文献
65.
对推进铁路货运业务向现代物流转型的探讨 总被引:2,自引:0,他引:2
应用SWOT分析法系统剖析铁路货运业务实施现代物流转型战略的环境因素,对铁路发展现代物流的战略定位、基本功能、总体思路进行初步探讨。 相似文献
66.
Opaque Web practices among low-cost carriers 总被引:1,自引:0,他引:1
The low-cost airlines' adoption of Web technologies to facilitate direct sales has accelerated their market penetration. However, some low-cost carriers are increasingly using Websites to create distance between themselves and their consumers in specific areas of their operations, while simultaneously developing excellence in sales transaction completion via self-service. The ‘opaque’ practices many low-cost carriers employ appear to be intentional design features and are contrary to the ethos of designing a ‘good system’ to facilitate the full spectrum of customer service. As a result, the low-cost sector has come under increased scrutiny for engaging in unfair practices and violating consumer protection law. 相似文献
67.
Exploring the use of travel information – identifying contextual market segmentation in Seoul, Korea
Chang-Hyeon Joh Backjin Lee Miyoung Bin Theo Arentze Harry Timmermans 《Journal of Transport Geography》2011,19(6):1245-1251
As the amount of information is rapidly growing, and ubiquitous urban environments are emerging, the question which kind of information to provide is a major challenge for commercial and public travel-information service providers alike. This paper reports the analyses of recent data, collected in Metropolitan Seoul, about the acquisition of travel information. The study applies CHAID analysis to find homogeneous segments in travel information acquisition. Findings indicate that contextual variables are crucial to explain information acquisition behaviour, depending on decision context. The implication is that both socioeconomic and contextual variables are important to better understand the acquisition (and provision) of travel information. The results have important implications for managers and policy-makers, in particular in the way they respond to dynamic, contextual market segmentation. 相似文献
68.
可持续发展与环境保护立法的双向互动 总被引:1,自引:0,他引:1
可持续发展客观上推动着环境保护立法的完善,并且把这一理念融入到环境保护立法之中。同时,要真正实现可持续发展离不开环境保护立法的保障与支撑。因此,既要不断推进可持续发展,又要不断完善环境保护立法,从而做到可持续发展与环境保护立法的双向互动。 相似文献
69.
归纳公路运输业的特点,分析公路竞争对铁路现代化发展的影响,建议铁路从速度、时间、价格、服务和行车密度等方面采取措施,应对来自公路的挑战。 相似文献
70.
To understand as to how scheduled air services link a region to other markets, we develop connectivity and hub centrality metrics. These metrics measure the quality of all scheduled air services in terms of frequency, detours, layover time and destination quality using a valuation scale being derived from observed passenger behavior. By computing yearly scores for 1990 to 2012, we analyze the geography of and trends in worldwide connectivity and hub centrality. While we observe significant growth of aggregate connectivity, the trends are heterogeneous with regard to the type of connectivity as well as time and location. 相似文献