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本文研究了浦东机场货站(PACTL)卡车航班的运作模式,通过卡车航班不仅拓展了企业业务、提高了经济效益,同时也使上海机场的服务功能得以延伸、服务范围得以扩大。最后,对浦东国际机场卡车航班的三种主要运营模式进行了分析。 相似文献
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依据2022年2月24日0时生效的第202202期导航数据库整理出厦门高崎机场运行标准,根据机场地形地势分析形成低能见度天气的原因,结合机场2010—2019年航空例行天气报告报文的详细内容,梳理机场低能见度天气月份分布及小时分布特点。最后通过对2018年3月4日一次雾天气发生过程的研究,梳理对机场运行造成的影响,提出厦门高崎安全飞行和运行控制的建议。研究可知:1)平流雾是厦门机场造成低能见度天气的主要因素之一,它的出现有明显的季节性;2)要确保低能见度天气下的安全飞行,需要多部门的协作,按照规章展开工作,并加大新技术的推广和应用;3)签派员应加强天气发展趋势的预报能力。 相似文献
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本文对浦东国际机场一期工程、二期工程的融资实践过程进行了总结、分析。浦东机场在政府财政投入资本金和银行贷款的基础上,一期工程实现了虹桥机场上市和货站、配餐、加油站等项目融资,二期工程则通过股份公司债券,以及宾馆、货站等项目运作筹集建设资金。浦东国际机场多元化融资主要通过两种渠道,一是对机场设施进行拆分,通过项目运作融资;二是对资产进行整合,通过资本市场、股权市场融资。 相似文献
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因极端天气的增多使得机场飞行区面临的洪涝风险大大增加,机场现有排水系统已较难处理极端暴雨天气造成的机场内涝,对此中国民用航空局提出建设海绵机场的新思路,并通过在北京大兴国际机场、成都天府国际机场和青岛胶州国际机场等枢纽机场的建设实践中积累了经验,对中小机场的排水系统改造给予启发。本文以东营机场为例,通过使用SWMM仿真对海绵化改造前后该机场飞行区面对大到暴雨情况下排水系统的工作情况进行模拟,分析海绵化改造尝试及伴随产生的新问题,提出适宜我国中小型机场排水系统设计建议。 相似文献
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对我国高原机场的运行环境特征进行分析,并探讨这些特征对飞行的影响。高原和山地地区的高原机场地形复杂,气象变化多样,给放行工作带来困难。针对这一问题,比较不同航空公司高原机场签派放行的标准和流程,得出有利的研究结论。 相似文献
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信息时代的交通气象服务 总被引:1,自引:0,他引:1
<正> 在整个交通运输过程中,除车辆、道路等以外,天气将是影响交通运输的最重要的因素;事实上有相当多的交通事故,是和雨、雪、雾、高温、大风和低温等不利天气相关联的。影响交通安全的天气因素有时是综合性的,如低温、大风、大雪同时出现。特别是在冬季、秋冬和冬春季节,恶劣天气时常引发交通事故、造成堵车甚至关闭高速公路、机场等现象。以下摘自有关国内外报道: 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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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
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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