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随着电子商务兴起和满足物流管理中降低库存、提高顾客服务水平的需要,城市货运组织出现多品种、少批量、多批次的JIT配送和直接配送、家庭配送等发展趋势。货运需求变化导致城市道路货运车辆大大增加,加剧了城市交通拥挤和环境污染。交通拥挤使货运车辆速度下降,导致城市配送成本上升、配送准确性和顾客服务水平下降,使企业降低物流成本的目标难以实现。我国许多城市已经完成现代物流(业)发展规划,对区域物流发展提出宏观战略构想和保障措施,物流业规划宏观性决定其对城市货运问题没有进行深入研究。而目前我国城市交通规划中很少进行货… 相似文献
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<正>一、电子商务环境与物流电子商务是随着计算机网络与通信技术的迅速发展,特别是Internet的普遍应用,而产生的一种全新的商务运作模式。作为电子商务前身的EDI技术的产生,其目的就是为了简化单证的处理过程,从而加快物流的速度,提高物流资源的利用率。而电子商务的出现,也是为了解决繁琐的信息流、商流和资金流的处理对现代化物流的缓滞,从而进一步提高现代化的物流速度。由此可见,电子商务的发展对促进综合物流现代化具有重要影响。因此,如何利用网络环境,借助电子商务提高物流系统的效率和速度, 相似文献
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当传统物流遇到电子商务,无异于获得了转型升级跨越式发展的良机,大批企业和互联网巨头纷纷构建物流网络,以期联通“天上地下”挺立潮头。但电子商务面对的物流瓶颈仍然巨大,一边是电子商务行业反映物流不好管理,成本太高,另一边却是物流企业叫苦利润太薄,成了电商的“跑腿”。 相似文献
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10月18~19日,由《物流技术与应用》杂志社、《货运车辆》杂志社、中国物流产品网联合主办的"第二届中国电子商务与现代物流研讨会暨第四届中国城市物流发展论坛"在北京举行。会议对电子商务物流和城市物流发展面对的现实问题进行了剖析,并发布了2012年中国电子商务与物流发展报告,揭示了2012中国电子商务呈现的新趋势。中国电子商务交易规模分析2012年中国电子商务延续2011年快速发展态势,同时呈现出多种新的趋势,预测全年市场交易规模有望达到9.5万亿元,同比增长46.15%。展望2013年,中国电子商务行业将进一步成熟,规模化和精细化将是主要特色。 相似文献
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10月18-19日,由《物流技术与应用》杂志社、《货运车辆》杂志社、中国物流产品网联合主办的“第二届中国电子商务与现代物流研讨会暨第四届中国城市物流发展论坛”在北京举行。会议对电子商务物流和城市物流发展面对的现实问题进行了剖析,并发布了2012年中国电子商务与物流发展报告,揭示了2012中国电子商务呈现的新趋势。 相似文献
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一些精明的制造商们开始不满足于传统的销售渠道对企业销售额的拉动。在他们看来,电子商务已不仅仅是“鼠标+车轮+代收货款(COD)”,电视、声讯、型录(DM)、3G手机等多种形态的电子商务手段也可以加配送和代收货款,而这些多样化的电子商务销售渠道都可以提高销售额。 相似文献
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Pedestrians as compared to vehicular traffic enjoy a high degree freedom of movement even in heavily congested areas. Consequently, there are more alternative links available to pedestrians between a given origin‐destination (O‐D) pair. This paper describes a study done by the University of Calgary to evaluate the factors affecting the choice of route on intra‐CBD trips or trips within the Central Business District (CBD). An origin destination survey conducted in downtown Calgary, Alberta enabled the identification of the most significant factors influencing the choice. These factors were analyzed in relation to the physical characteristics of the location, personal characteristics of the trip maker and the type of the trip. It appears that most people chose the shortest link and factors such as the level of congestion, safety or visual attractions were only secondary. This suggests that the length should be made a major consideration when planning and designing pedestrian links. 相似文献
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This paper estimates the efficiencies and productivity changes of 12 international airports in the Asia-Pacific region based on data from 1998 to 2006. We apply stochastic frontier analysis (SFA) to compute efficiency estimates and use the Malmquist productivity index (MPI) to analyze productivity changes. We use the SFA model with a translog-type production function after testing the statistical hypotheses. According to the results of the SFA hypothesis tests, airports have experienced a technological regression; the deviations from the efficiency frontier are caused more by technical inefficiency than random noise. However, the inefficiency was found to decrease. The MPI reveals a declining trend resulting more from technological change than from efficiency change, with a decrease in inefficiency. Taken together, both the hypothesis tests and the MPI not only provide consistent conclusions, but also suggest that airports should concentrate on technological progress. 相似文献
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天然气自动计量系统有多种组态软件,由于软件的不相通性,造成了计量系统数据采集的通用性差、数据传输与入库的时效性差、数据利用的可靠性低.结合各组态软件的实际情况,从设计上充分利用Oracle大数据处理能力以及Partition(分区表)的特性,实现历史数据的存储,应用WebService与COM+数据访问组件提供多层数据访问架构,采用OPC与DDE工业数据交换协议,实现了各站场计量数据的实时上传,为连续数据采集和实时监控提供了可能,节约了改造成本. 相似文献
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明确埋地管道防腐保温层的技术评价标准,对埋地钢质管道的安全运行,延长管道使用寿命具有重要意义。为了对埋地管道防腐保温层做出有效评价,从间接检测与开挖检测2个方面,结合现场检测数据,提出了基于防腐保温层的电流衰减率、绝缘电阻率、质量状况与厚度的分级评价标准及基于4种评价指标的综合评判方法。工程实践表明,该评价标准对防腐保温层是否存在失效能做出有效判断。 相似文献
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介绍了城市轨道交通工程中杂散电流不同的监测系统的构成,分析了集中式、分散式和智能型等监测系统的配置和功能,以及智能型实时在线监测系统的重要意义,为轨道交通工程杂散电流监测系统的选择与应用提供参考。 相似文献
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《Transportation Research Part A: General》1991,25(6):407-418
The main deficiency of most current modeling approaches to transportation can be identified as neglect of the integration of existing geographical knowledge in regard to the ex ante transport/land use modeling approaches, with its focus on territorial dynamics and theory development. This paper addresses this aspect of the problem by introducing a theoretical and methodological framework for the analysis of the interrelationship between land uses. The analysis attempts to determine to what extent the functional land use in a city can be considered an ordered pattern. The order sought does not rely on purely spatial configurations, but on the correlation of transportation and land use. The first section of this paper focuses on theoretical considerations. It stresses the fact that conventional approaches do not apply in the present context. It then suggests an alternative based on areas of influence and measured in terms of level of attractance of land uses. The second describes a procedure based on this alternative following the remarkable contribution of Hanjoul, Beguin and Thill. An application of this procedure to the analysis of Shanghai is then examined. Finally, an evaluation of the strategies for optimizing the interrelationship between land uses is presented. The paper concludes with a possible research agenda. 相似文献
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Joseph N. Prashker 《Transportation》1979,8(4):329-346
Reliability of travel modes was found to be the most important characteristic of transportation systems in several attitudinal investigations of individual travel behavior. This paper represents the first part of a research effort aimed at gaining a better understanding of the characteristics of reliability of transportation modes in urban travel. In this research, reliability characteristics are identified; their importance relative to each other is assessed, and an insight into possible structure of an objective reliability index is discussed. The research is based on perceived values of reliability, which were identified through a large attitudinal survey conducted in the Chicago metropolitan area. 相似文献