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宁夏回族自治区交通运输厅 《运输经理世界》2013,(9):36-37
自2011年宁夏被交通运输部列为全国首批道路运输行业推广应用天然气汽车试点省区以来,宁夏交通运输厅全面落实《公路水路交通运输节能减排“十二五”规划》和《建设低碳交通运输体系指导意见》,扎实开展了道路运输行业天然气汽车推广工作。截至2012年底,全区道路运输行业营运车辆保有量144910辆,天然气汽车达到19633辆,占营运车辆的13.5%,其中客运天然气汽车17481辆,占营运客车的69.4%,全区驾驶员培训学校天然气汽车占教练车比例达72.3%。2012年共新增cNG营运车辆692辆,LNG营运车辆157辆。 相似文献
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<正>营运车辆是指从事经营性的道路客、货运输的车辆,主要以客车、货车、危险品运输车、出租车等几种形式为人民群众生产、生活提供服务。2006年末我国营运车辆达到800多万辆,其中客运客车 相似文献
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将交通管理系统、出行信息系统和车辆控制与安全系统等子系统的技术应用于营运车辆,为车辆创造一个安全可靠的运营环境,可提高运输效率、减少运输成本、提高生产力。北京航空航天大学交通科学与工程学院田大新博士为论坛带来相关的最新研究思路。政府关注动作大2009年,交通运输部以上海世博道路运输安全保障工作为契机,规划建设重点营运车辆动态信息公共交换平台工程,建设重点营运车辆联网联控系统。交通运输部道路运输司2009年7 相似文献
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《运输经理世界》2012,(6):97
江西景德镇汽车运输集团有限公司于2002年9月底成立,该公司资产规模为1.7亿元,年经营收入达到1亿元以上,精品高客线路15条,客运线路160条。面对每天数百辆客车的运行,每天上万旅客的运送,江西景德镇汽车运输集团公司始终把安全生产作为企业管理的重中之重,先后制定涉及安全责任、事故处理、责任追究等方面的安全制度,2010年计划投入一百多万元改造营运客车视频监控中心,实现对每辆客车运行及车厢内部状态的同步可视管理,有效杜绝超速、超载行驶等危及运输安全现象的发生。景德镇联通公司在经过与江西景德镇汽车运输集团公司的深入沟通,了解了用户需求的主要顾虑:网 相似文献
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<正>一、道路运输的发展现状 改革开放以来,我国道路运输发展非常迅猛,目前道路运输完成的客货运输量除货物周转量外,客运量、旅客周转量和货运量均占各种运输方式之首。到1999年底,全国共有从事营业性道路运输的营运车辆537.64万辆,其中营运客车(含出租汽车)120.54万辆、营运货车417.10万辆;共有道路运输企业及经营业户393.82万户、从业人员1322.05万人;1999年共完成客运量126亿人次、旅客周转量6145亿人公里、货运量99亿吨、货物周转量5793 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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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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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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《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