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南通港在上海国际航运中心的地位 总被引:1,自引:0,他引:1
南通港口的概念有两种,一是传统意义上的,指由南通市区内长江入海口北岸的狼山、姚港、通州、天生、任港、如皋等港区组成;一是现代意义上的,即上述目前处于主导地位的长江港区和南通市区内东部沿海的洋口及吕四港区。1997年,国务院以《关于同意上海组合港组建方案》的批复正式批准成立上海国际航运中心组合港的实施。南通港口从此列为上海国际航运中心组合港的主要成员之一,是组合港北翼一个重要港口。南通港口不论从独特的地理区位优势,还是从港口的规模和参与上海经济圈的协作分工与竞争发展等方面,都将在建设上海国际航运中心中快速发展,并占有重要地位。 相似文献
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结合栾家口港区2×5万吨级散杂货泊位设计,介绍了靠山临海老港区在狭窄陆域和已有航道条件下总平面布置的特点,提出了设计中注意结合原港区的功能分区进行平面布置,码头轴线的确定和进港航道的选取等问题。同时针对港口总体规划,在引堤宽度、陆域面积、航道规划方面提出了建议。 相似文献
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《综合运输》2016,(9)
完善的集疏运系统是港口快速发展的重要前提。随着京津冀交通一体化的全面推进,迫切需要研究如何完善天津港以公路、铁路为主体的陆路集疏运系统,提供通达腹地、能力充分、便捷高效、衔接顺畅的交通服务。本文采用"问题导向、规划引领"的方法,首先从集疏运方式分担和集疏运通道建设两方面梳理了天津港目前的陆路集疏运体系现状,分析了存在集疏运交通不畅和港城交通矛盾的问题和成因;然后根据天津港规划的功能布局和未来的交通需求,结合鹿特丹港、深圳盐田港等国内外先进港口的发展经验与启示,拟定了天津港陆路集疏运系统的发展目标和思路;最后从硬件设施改善方面提出了公路、铁路集疏运系统完善方案,重点是进出港衔接道路、港口对外通道等层面的网络设施建设任务,并且从软环境优化方面提出了具有针对性、可实施性的对策和建议。 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