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《综合运输》2019,(12)
一方面作为我国战略性新兴产业的物联网正在深刻影响社会经济生活的各个方面,也为交通领域带来巨大变革,另一方面国家新型城镇化战略发展进入下半程,城市群将成为推进城镇化进程的主体形态,在两大战略背景下交通规划工作应当进行优化调整以适应新形势要求。本文在总结物联网时代交通系统在数据采集、需求识别、出行特征以及运营管理模式方面发生的变革基础上,对城市群交通系统进行解构,分析城市群交通需求特征及未来变化趋势,从规划技术方法升级和规划理念创新两个方面提出交通规划方法优化建议,指出城市群交通系统应当着力构建互联互通交通设施网络、加强交通通道功能复合化、实现通道与网络多点衔接、强化网络融合实现联程运输。 相似文献
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新型城镇化背景下,中小型城市正处于关键的发展阶段,规模扩大,交通结构面临转型。本文针对中小城市的城市特点,从网络覆盖率和时间可靠性的角度提出了"便捷准时"的公交服务新模式,构建科学高效的公交服务体系,引导城市交通结构良性发展,为建设低碳交通系统奠定基础,并为公交企业和相关部门提供参考。 相似文献
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如何进行交通资源的优化配置以及如何进行路权分配等问题,影响今后10年至20年甚至更加长远时期中国城市交通的状态和水平,决定生态城市、绿色交通系统的建设目标能否实现。本文针对上述问题,进行了系统分析,给出了解决上述问题的研究结论。 相似文献
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绿色交通系统对改善城市交通拥堵,减少交通能耗、环境污染,提高城市的宜居性等方面有着积极的推动作用。文章从城市规划和土地利用开发、交通需求管理、交通基础设施建设等方面阐述了城市绿色交通的建设与发展策略,为发展、建设城市绿色交通提供思路。 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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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
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本文阐述了混合动力列车的技术特点及其相应优势与劣势,同时介绍了其在国内外的研究动向,并对其应用前景进行了展望。尽管该类新型铁道车辆的续航能力、电池寿命以及成本等相关问题目前仍有待改善,但以其对城市环境的美化作用与优越的舒适驾乘性能,以及高效节能、绿色环保的显著优势,依然不失为一类充满前景的新型轨道交通运输方式。 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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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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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