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本对各种型式索道用的迂回轮基础设施方案进行了理论分析和探讨。同时对基础施工中各方面人士比较在心的是否留施工缝问题,根据作多年施工管理经验,谈了不同看法,可作为今后索道设计和施工中参考。 相似文献
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目前,我国管道漏磁腐蚀检测技术及设备不断得到应用和普及,为管道维护和管道管理提供了科学准确的检测数据。提高检测数据和维护开挖时的定位精度,可使管道腐蚀检测更好地为管道维护、大修服务。通过对管道磁腐蚀检测器在实际生产中的运用,本文简要地分析了影响管道漏腐蚀检测器定位精度的原因,并提出了提高检测器定位精度的方法。 相似文献
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本文以齐鲁乙烯扩建工程10#污水管线改造采用的HDPE管管线穿插技术和翻衬技术为例,介绍了该技术施工方法、管径选择及特点。应用表明,该技术更新旧管线技术先进、施工方便、速度快、费用低、社会效益好,是一种具有很高的应用和推广价值的实用技术。 相似文献
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玲珑轮胎日前推出了卡客车驱动轴专用及导向轮专用省油产品——DL810和TL809两款花纹轮胎。这两款轮胎凭借较低的滚动阻力.更优化的花纹设计和更强壮的胎体结构.保证了产品的最佳使用效果.为广大卡客车用户提供了更加安全、更加经济的轮胎使用方案。 相似文献
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作为“用户赚钱工具”的重卡产品,江淮重卡中体车新品以“平衡市场需求、提升用户利益”为前提,上市即为用户带来“真金白银”的价值,不仪满足用户利益最大化需求,更体现了江淮重卡的一是质新价值和“全心全意为用户”的决心。 相似文献
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冷链具有广泛性,它是按照用户和产品的要求提供可控温度以及必要的其他条件的物流服务链。
按照用户和产品的要求以及提供可控温度的不同,冷链物流可以进一步分类。如按照用户和产品的不同,可分为:鲜活产品冷链、冷冻食品冷链、 相似文献
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分析了导致换热管失效泄漏的原因,介绍了采用薄壁金属波纹管作为衬管的修复技术,并与塑料衬管修复工艺进行了比较,最后,对衬管后的换热率作了分析,得知换热效率的损失约在4%左右。 相似文献
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12月11日,华菱星马2014新产品全国巡展车队来到河北石家庄,并在当日下午举行用户座谈会,向当地用户推介巡展新产品。400多位当地专用车和物流车代表齐聚石家庄众诚假日酒店,参加了座谈会。
华菱星马董事长刘汉如出席座谈会并作总结讲话,总经理助理薛永昌致欢迎辞,座谈会由营销分公司华菱营销部叶军主持。 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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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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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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