合纵连横 跨省调剂运力——黄山长运牵头“春运运输联盟”

几亿人在路上,几亿人在牵挂,几百万人在服务,被誉为史上规模最大的周期性人类大迁徙——中国的春运,照例再次在2012年上演。在短短的一个多月中,面对30多亿人次的人口流动,无论是铁路、公路还是水路等,运力的紧张是普遍现象。     

国Ⅳ标准实施在即 更环保的润滑油哪里寻

据统计,我国在汽车尾气排放方面,面临着严峻的问题。有相关数据显示,在现行的国Ⅲ标准下,我国的汽车尾气排放合格率达不到70%,在以柴油发动机为主的商用车,排放合格率更低,达不到50%。在大多城市,尾气排放不达标造成的环境污染成为空气质量和居民健康的主要污染源。     

塞浦路斯海运业及船舶市场简介

塞浦路斯加入欧盟以来,一方面为了改变挂塞旗船舶的形象、提高挂塞旗船舶在世界航运界的地位,塞浦路斯交通部商船局提高了对在塞船舶注册的要求,加大了对挂塞旗船舶的管理力度;另一方面自1988年以来,土耳其禁运,不允许挂塞旗的船舶通过其海域,越来越严重影响到船东到塞注册、挂塞旗的积极性,因此近年来,在塞注册船舶有所下降,2004年底,在塞注册船只数量排世界第九位。虽如此,在塞注册船舶仍有1846条,在欧盟国家中排第三,其海运收入为3亿塞镑,占GDP的4％。另据塞船运协会介绍,截至2004年底,在塞船东,拥有在航船只1911条,总吨位达3430万吨,其中只有285条船舶挂塞浦路斯旗。在塞注册和未在塞注册的船舶共3757条,因此塞浦路斯仍是世界重要的海运强国。     

BLG拓展在华汽车物流业务

10月23日,BLG在北京召开新闻发布会,宣布扩展在华汽车物流业务。BLG重视中国市场BLG来自德国,成立于1877年,在全世界有100多家机构,为世界7000余家汽车经销商提供物流服务,是欧洲乃至世界物流市场的领军者之一。2011年,BLG的汽车物流达到650万辆。2004年,BLG正式进入中国汽车物流市场。目前,BLG在北京设有代表处,与中国华图供应链股份管理有限公司合作,在天津港成立了博格华图汽车物流有限公司。在谈到为什么要扩展在华汽车物流市场时,BLG董事会主席德特霍尔德·阿登认为,"在过去的10年中,中国向世界所展示的经济实力令人印象深刻。"     

独步青云俯瞰竞争——专访天津中远物流有限公司副总经理陈春声

"海陆舱模式"的出现,或许会对在"红海"中打拼的物流企业有所启迪。2006年,广东佛山,物流百强CEO论坛。陈春声介绍了由他创立的海陆舱经营模式。记者发现,这种模式在物流界是崭新的,有别于他人。一年后,记者与陈春声在北京香山重逢,我们欣喜地看到,这种新模式在不断地扩大,劲力渐显。     

安凯客车：2012“全球使者”-安凯客车2012之盘点

2012年如果要评年度中国客车“全球使者”,那么安凯客车一定首当其冲。在英国伦敦、在美国拉斯维加斯、在澳大利亚悉尼……,处处都有安凯客车靓丽的身影。欧美市场的开拓对中国客车人而言有着里程碑式的意义。2012年,我们看到了安凯客车的品牌升级,实现了由内到外的完美蜕变。2012年,我们看到了安凯不仅在全球客车市场纵横驰骋,也在新能源客车市场高歌猛进。     

荷兰道路运输企业在货物运输成本方面的计算

<正> 在国内,各运输企业计算货物运输费用的单位是吨公里。然而在荷兰,运输企业在计算货物运输成本的单位却是每吨货物的运费,下面就着重介绍荷兰在货物运输成本方面的计算方法。     

京东人同心战“疫”的15天

正在抗击疫情的过程中,各行各业的人奋战在武汉一线,与时间赛跑、为生命护航。也有许多人默默坚守在各自岗位上,为抗疫情、保民生而奔波忙碌。这其中,有一抹京东红,让无数人感受到了守望相助的力量和温暖。2020年的春天已经来了,武汉的樱花就要开了。抗击疫情的好消息越来越多。在这场战役中,各行各业的人奋战在武汉一线,与时间赛跑、为生命护航;也有许许多多的人默默坚守在各自的岗位上,为抗疫情、保民生而奔波忙碌。     

灯塔史话

灯塔是历史最悠久的视觉航标之一,一般设置在沿海、沿江航线附近的岛屿、礁石或岸边。通常建成塔形,故名"灯塔"。希腊人在公元前5世纪就知道在夜里用灯塔来指示港口了,而灯塔在地中海的出现,要比在希腊早得多。世界上最早的灯塔建于公元前7世纪,位于达达尼尔海峡的巴巴角上,样子像一座巨大的钟楼矗立着。人们在灯塔的容器里燃烧木柴,用它的火光指引航向。世界上最早有文字记载     

伦敦机动车进城收费制度的借鉴

前不久,纽约市政府想在曼哈顿实行机动车收费制,但在州议会讨论时却没有取得共识。为此,伦敦市长在《纽约时报》发表文章,介绍了伦敦机动车辆收费制度的经验。我觉得,这封信不仅纽约人需要读,北京人更要读。伦敦近年来发展甚快,交通过度拥挤。2003年,伦敦在市中心采取机动车收费制,进城的车每辆收费5英镑,如今已经提高到8英镑。     

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。     

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.     

盾构隧道管片接头抗剪力学性能研究

通过对南京长江盾构隧道环向管片接头进行的三组原型抗剪(无螺栓剪切、有螺栓逆剪和有螺栓顺剪)加载试验,分析研究了管片接头在剪力作用下的受力、变形和破坏特征,给出了管片接头混凝土接触面的静摩擦系数,得到了接头剪力主要由混凝土接触面承担、破坏形式为连接斜螺栓剪切延性破坏的结论。通过对管片结构的有限元数值模拟计算得出:接头处的剪力与轴力比小于接缝面的摩擦系数,管片不会发生相互错动,结构是稳定的。     

管道施工组织设计

在管道工程建设中，管道施工组织设计是一项重要的经济管理性文件，也是验证施工企业在工程建设中具有的施工实力和管理水平的综合技术能力体现。它对工程建设项目施工全过程活动的质量、进度、技术、安全、经济和管理组织起着不可估量的重要作用。     

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。     

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。