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油气管道是连接油田、炼厂上下游的重要部分,油气的安全输送是保证油气产量的关键。油气管道运行时的内外部因素给管道安全带来隐患,在油气管道安全运行中引入GIS测绘系统,采集油气管道安全管理相关数据,并对数据进行分析和处理,为管道安全运行提供了决策依据,有效地消除了管道运行安全隐患。 相似文献
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文中通过无人机技术获取遥感监测影像、Laravel开发模式、Cesium 3D三维模型,整合燃气管线信息,构建了基于GIS的长输管道无人机巡检管理平台,实现了无人机巡视、GIS管理的智能化巡检,并应用于山东省滨州市某天然气长输管道,提高了长输管道的巡检作业效率. 相似文献
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GIS(地理信息系统)提供地理信息服务,已在长输管道的设计、运行、检测维护中广泛应用.文中分别介绍了GIS在管道设计中的作用(可提高选线的准确性,节省人力、物力),以美国SunShine公司在管道选线中应用GIS为例说明;在运行中的作用(可提高数据管理的有效性),列举了美国Lake-head公司的应用情况;在管道检测、修复中的作用(可评估泄漏应急反应时间,最大限度地减少或避免管道泄漏),以国内新建日照-仪征管道为例说明. 相似文献
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随着地理信息系统(GIS)的产生和发展,采用GIS技术实现油田管网空间数据和属性数据的统一管理成为未来油田管理系统的发展趋势.文中主要阐述了油田集油管网地理信息系统的建设思路和实现方法,针对头台油田的实际情况,以组件式GIS系统软件和面向对象编程为基础,开发了一套方便实用的油田集油管网地理信息系统.系统实现了油田集油管网的数据采集、管线图绘制,以及信息的浏览、查询统计、空间分析、综合管理等功能,并介绍了GIS系统与油田管道SCADA系统的综合使用,从而实现油田管道的泄漏检测分析和管道风险评价分析等专业分析功能. 相似文献
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地理信息系统(GIS)作为一种先进的空间信息技术,在交通运输决策管理、运营组织、规划建设、科学研究等领域得到广泛应用,尤其是智能交通系统、现代物流信息系统建设的加快,GIS技术的应用与发展受到普遍关注。近几年,地理信息系统技术与互联网技术相结合产生了互联网地理信息系统(Web GIS),实现GIS的网络化应用,成为GIS技术应用的热点和发展方向。综合运输地理信息系统正是采用Web GIS技术,通过Browser/Server技术架构,实现面向公众、图文并茂、可视化的、具有交互功能的,集铁路、公路、水运、民航、管道于一体的综合交通运输基础数… 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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《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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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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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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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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