春运信息不对称比大雪更烦人

据中央气象台消息.1月28日我国部分地区可能还将出现大到暴雪.中央气象台预报说,从27日到28日.河南南部、湖北中东部、安徽中部和北部、江苏南部、湖南北部等地将出现中到大雪,局部地区有暴雪.因大雪广州火车站滞留在广场的旅客达到10万人;一些地方的客运也因高速公路的封闭而出现停滞.     

为什么客运大巴屡屡被砸?

对于客运大巴运营者来说,黄金周、春节等客运的高峰时期,往往是其一年中在票价上得以"舒展筋骨"赚得瓢满钵满的时间.在高额利润的驱动下,形形色色的挂靠车、承包车甚至由私家车客串的"黑车"与公车一齐争客.争抢当时,旅客行李被抢上一台车,而人被推上另一台车的情形并不少见.     

小小接驳站为何能做节能大文章?

近几年,全国高速公路迅猛增长,但封闭式管理并没有给沿线群众带来应有的便利.当地老百姓长途出行只能中转到规模大的车站,而客运车辆也只能通过出口到达市区汽车站后才能允许旅客上下车.这给群众出行带来不便,同时也给客运班车带来不便,直接或间接造成了燃油、车辆等的损耗和浪费.     

转型路向:服务与发展——浙江省道路运输管理局局长张平平专访

2007年11月14日.交通部发布<关于促进道路运输业又好又快发展的若干意见>(交公路发[2007]610号.以下简称"意见").<意见>发布后,浙江省道路运输管理局快速反应,11月26日至27日在之江饭店召开了党委理论学习中心组务虚会.     

攻防兼具抢占市场——专访湖北公路客运(集团)有限公司董事长、党委书记庄宝麟

庄宝麟认为,客运发展的重点应是发展公车,在此基础上,旅游客运亦将成为道路客运企业开拓运输市场的主攻点和经济效益新增长点.     

防污染系列案例2防污染管理要有科学态度

H轮抵港前,由于装货的需要,使用通用泵排艉尖舱压载水,这时甲板值班水手和驾驶员发现排出舷外的水中有油,立即通知三管轮停泵.机舱人员在检查管系阀门时发现,通用泵管系通往机舱后污水井的腰节阀漏泄,为防止再次污染,船员紧急封死该阀,并把所有被污染的管系拆下,进行清洁.     

一起断桥缘何成为危机公关典型案例?

2007年6月15日,位于佛山境内的九江大桥被运沙船撞塌,4车从桥上坠落、9人罹难.一波三折的救捞工作尚未结束,事故调查组给出"不关桥事"的结论. 行政方怎么查、法庭如何审理,这对圆满处理九江断桥事件、解民疑平民怨至关重要,但事件暴露出的政府危机公关能力确实值得深思.     

深圳汽车租赁公司为何"没人疼"?

2007年11月8日,深圳市龙骏汽车租赁公司把一辆大巴车租给旅行社,送一批香港客人去机场,车行至南山区桂庙天桥附道时,被深圳市交通局运政分局执法人员拦下,执法人员以没有营运证、非法营运为理由扣留司机的驾照,并处以3万元以上的罚款.     

清洁动力,服务中国——康明斯豪华阵容亮相上海客车展

日前,康明斯以豪华高贵的阵容参加了为期4天的2008世界客车博览亚洲展览会.首次亮相的新型康明斯3.8升直列四缸高压直喷式轻型柴油机.由北京福田康明斯生产是全球首发机型,计划200g年投产.     

空客A380来了!

10月15日上午,南航成为全球第七家运营空客A380的航空公司,我国航空公司购买的首架A380也从法国图卢兹飞抵北京首都机场,这个被业内称为小胖墩的全球最大客机来到中国也变得亲民不少,中国民航正要迈入超大型客机运营的新时代。南航共向空客公司订购了5架A380,第二架有望于今年     

Analysis of factors affecting the choice of route of pedestrians

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.     

实现多组态计量软件集中监控的可行性分析

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.     

注汽管道承压能力评估和实物试验验证

基于失效评估图技术对某注汽管道进行了承压能力评价,给出了管线在不同腐蚀壁厚情况下的极限承压能力和极限裂纹尺寸。并利用实物爆破试验验证了评价方法的安全性和有效性,通过对爆破断口进行宏观和微观分析,发现管段的开裂属于脆性开裂。     

Evaluation of pedestrian crosswalk level of service (LOS) in perspective of type of land-use

In India pedestrians usually cross the road at mid-block crosswalks due to ease of access to their destination or the development of adjacent land use types such as shopping, business areas, school and residential areas. The behaviour of pedestrian will change with respect to different land use type and this change in behaviour of pedestrian further reflects change in perceived level of service (LOS). So, it is important to evaluate the quality of service of such crossing facilities with respect to different land-use type under mixed traffic conditions. In this framework, pedestrian perceived LOS were collected with respect to different land-use type such as shopping, residential and business areas. The ordered probit (OP) model was developed by using NLOGIT software package, with number of vehicles encountered, road crossing difficulty as well as safety considered as primary factors along with pedestrian individual factors (gender and age), land-use type and roadway geometry. From the model results, it has been concluded that perceived safety, crossing difficulty, land-use condition, number of vehicles encountered, median width and number of lanes have significant effect on pedestrian perceived LOS at unprotected (un-signalized) mid-block crosswalks in mixed traffic scenario. The inferences of these results highlights the importance of land use planning in designing a new set of pedestrian access facilities for unprotected mid-block crosswalks under mixed traffic conditions. Also the study results would be useful for evaluating pedestrian accessibility taking into account different land-use type and planning required degree of segregation with vehicular movement at unprotected mid-block crosswalk locations.     

Non-parametric analyses of efficiency of airports

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.     

波纹管应力分析研究进展

评述了波纹管应力理论研究方法的进展情况，围绕解析法、工程近似法和数值法，对波纹管理论研究中的一些主要成果作了较详细的回顾和总结，对各种研究方法作出了评价，展望了亟待解决的一些问题。     

城市轨道交通杂散电流监测系统概述

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。     

埋地管道防腐保温层失效评价

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。     

输油管道中原油乳状液的流变性研究

原油乳状液的流变性是原油开采后在管道中输送的重要研究方面,为了更好地研究这一性质,采用电动搅拌机、偏光显微镜以及流变仪等仪器来测定不同含水率的原油乳状液在不同条件下的黏度,观测不同含水率的原油乳状液在偏光显微镜下的形态。并且分别对原油乳状液的黏度与含水率之间的关系以及与剪切速率之间的关系进行研究,初步确定了所测区块原油乳状液的转相点以及该区块原油乳状液的流变特性,为生产中的油气集输提供了理论依据。     

Direct analysis of the perceived importance of attributes of reliability of travel modes in urban travel

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.