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351.
ABSTRACTTo survive under the ever increasing competitive and global pressures to operate more efficiently, transportation companies are obliged to adopt a collaborative focus. Various types of cooperative supply chain relationships have been discussed in both professional and academic literature over the last decades. However, research on horizontal cooperation in logistics remains scarce and scattered across various research domains. Companies operating at the same level of the supply chain and performing comparable logistics functions may cooperate horizontally to increase their productivity, improve their service level and enhance their market position. In this paper, the focus is on the operational planning of horizontal cooperations between road transportation carriers. Following a scientific literature review, a distinction may be made between two operational approaches to horizontal logistics collaboration: order sharing and capacity sharing. For both research streams, a detailed overview of solution techniques proposed in literature is presented. Moreover, some interesting opportunities for future research are identified. 相似文献
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ABSTRACTThis paper focuses on understanding to what extent the components of LUTI models and their mutual interactions are conceptually represented by eight operational LUTI models. This is important for the understanding of LUTI models’ mechanisms, firstly because it may reduce communication barriers between planning communities, secondly because it may help us understand the models’ applicability, and thirdly it may highlight the models’ shortcomings and point for future research. We present a discussion about what subsystems should be considered for LUTI modelling, from which we derived an “a priori” conceptual ALUTI model (incorporating Activities, besides Land Use and Transport). By comparing the rationale behind each model with this conceptual model, we establish the basis for our review, focussing on whether these models incorporate the ALUTI components, its inner workings and the relationships between these components. Results indicate three main limitations of the reviewed models. First, models not always adequately include all the components of the a priori ALUTI model. Second, the ALUTI subsystems’ internal functions are not explicitly modelled in several of the models reviewed, making it difficult to evaluate how planning decisions affect the subsystem. Third, only few models recognise all mutual interactions, especially in respect to the Activity subsystem. 相似文献
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Obrad Babić Milica Kalić Goran Pavković Slavica Dožić Mirjana Čangalović 《运输规划与技术》2013,36(3):257-280
Abstract When disturbances make it impossible to realise the planned flight schedule, the dispatcher at the airline operational centre defines a new flight schedule based on airline policy, in order to reduce the negative effects of these perturbations. Depending on airline policy, when designing the new flight schedule, the dispatcher delays or cancels some flights and reassigns some flights to available aircraft. In this paper, a decision support system (DSS) for solving the airline schedule disturbances problem is developed aiming to assist decision makers in handling disturbances in real-time. The system is based on a heuristic algorithm, which generates a list of different feasible schedules ordered according to the value of an objective function. The dispatcher can thus select and implement one of them. In this paper, the possibilities of DSS are illustrated by real numerical examples that concern JAT Airways' flight schedule disturbances. 相似文献
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机场运营效率评价及影响因素分析对科学反映中国主要民用机场运营效率现状,实现中国民航业可持续发展,提高中国机场国际竞争力具有重要意义.本研究首先利用双重导向型DEA模型测算2006-2010年中国27个主要民用机场的运营效率,然后从宏观环境、行业与区域竞争及机场特征三个方面探索机场运营效率的影响因素.研究结果表明,2006-2010年中国主要民用机场的运营效率基本维持在较高水平;各机场的运营效率自2008年始均有不同程度的下降,且机场间运营效率的差异呈现逐年增大的趋势;腹地经济、机场规模、机场级别和一市多场等因素促进了机场运营效率的提升;区域竞争和行业竞争则不利于机场运营效率的提升. 相似文献
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针对辽宁高速中心架构进行分析,根据云计算技术的发展,对辽宁高速的IT基础架构进行重新设计,提高数据中心的智能化水平,满足对数据中心的精细化管理的需求;为新业务系统的上线提供快速、高效的支持,并提高后期系统的可维护性;解决目前系统瓶颈,并满足未来可预见的扩容需要;对于辽宁高速新的数据中心的设计要立足于国家的云计算战略,使得辽宁高速的数据中心实现云计算实现的IT即服务,成为辽宁高速业务增长的助推器。 相似文献
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