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.     

为什么旅游市场运力矛盾重重?

随着市场的发展和深化,以大、中型团队为主的旅行方式逐渐减少,以家庭、朋友为团体的小规模特色旅游正成为一种新的形式和风尚.旅游市场的趋势为小型车发展提供了极大的商机.据相关部门近期对25家旅行社的调查,仅成都地区月需4-7座越野车、轿车1028台,8-12座商务车456台,13-20座小型商务客车189台.     

业界动态

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丘北何以开辟农村客运安监新路?

农村道路交通安全怎么管?仅仅是严格治理非法营运车辆? 2007年,云南省文山州委常委、丘北县委书记唐文祥为社会带来了疏堵结合、边治理非法营运车辆边发展农村客运的成功经验--修路建站,积极发展农村客运班车,方便农民群众出行,于是"黑车"没了生存空间,农村道路交通安全有了保证.     

成就更具卓越移动性的轮胎制造商——访米其林中国卡客车轮胎市场销售总监柯思图

总部位于法国克莱蒙-费朗的米其林集团,在全球拥有12.9万名员工,在19个国家设立了69家工厂,在超过170个国家设立了销售与市场机构.作为一家具有百年历史的跨国公司,米其林分别在北美、欧洲与亚洲设有研究与测试中心,始终站在技术革新的前沿.     

厚积薄发抢占国际至高点——访中通客车控股股份有限公司董事长李海平

清华校园有一个名为日晷的古代计时器,原为圆明园遗物,1920届清华学生毕业时将其献给了母校.日晷上的四个字"行胜于言"是清华校风的最佳总结,而对于清华人李海平来说,这几个字已经不仅仅是其为人的行事准则,更是他多年来奉行的治企之道.     

创新铸造辉煌——一汽解放锡柴年产销突破20万

2月21日,一汽解放公司无锡柴油机厂2007产销突破20万台庆典隆重举行.这是锡柴发展史上的又一次重大突破,标志着锡柴研发,制造具有国际先进水平柴油机的能力提升到了更高层次.     

世博专用海事执法轮艇列编上岗

<正>2010年2月9日,上海海事局世博专用执法轮艇列编仪式在该局世博办事处趸船码头举行,参与列编的9艘轮艇在黄浦江世博水域正式开始巡逻执勤。据了解,此次列编的轮艇包括12米级1艘、17米级3艘、26米级1艘、40米级2艘、     

网络话题

一线城市北上广深,已经进入了堵车时代,凡与交通有关的话题常常引发网络热议。除了传统的论坛、博客,现在中国网友又多了一条控诉中国城市交通的渠道——微博。近日频繁闪现的两个关键词——公交车司机和长途班车,出现在微博后,     

高架桥模式BRT首发

9月1日,厦门华侨大学集美校区校门前,省委常委、厦门市委书记何立峰宣布厦门快速公交正式通车.     

Logsums for utility-maximizers and regret-minimizers,and their relation with desirability and satisfaction

This paper studies to what extent the Logsum-measure of user benefits relates to travelers’ perceptions of choice set-desirability and choice-satisfaction. Knowing these relations is important since researchers have recently started to analyze and interpret user benefits in general – and Logsums in specific – in terms of these more behaviorally oriented notions, rather than in terms of expected utility. Participants to a stated route choice experiment were asked to indicate, after each choice made, to what extent they considered the choice set to be desirable, or to what extent they were satisfied with the chosen alternative. These measurements were correlated with Logsums that were computed for each choice situation. In addition, the paper derives a regret-based Logsum (which gives the expected regret of a choice situation) and presents a comparison with its utilitarian counterpart. Also for this regret-based Logsum, correlations with desirability- and satisfaction-ratings are computed. As a general finding, it appears that all computed correlations are rather weak. This suggests that, at least in the context of our data, the utility-based Logsum and its regret-based counterpart appear to have only a fairly weak connection with the behavioral notions of choice set-desirability and choice-satisfaction.     

高速公路改扩建工程水土保持监测与评价

开展水土流失监测是水土保持监管的重要手段。文章以广西沿海高速公路改扩建工程一期工程水土保持监测实践为例,分析了工程建设水土流失特点,介绍了水土保持监测技术和方法,并通过对工程实例监测结果的分析评价,提出了水土保持监测工作中易出现的问题及相应的解决方案。     

公路与水路运输节能减排量化分析和比较

通过研究汽车与船舶的油耗特点,结合燃油种类与CO_2排放量的关系,建立了计算公路运输与水路运输单位耗油量与单位CO_2排放量的数学模型。通过敏感性分析,研究车速或航速与载货率对车辆或船舶单位CO_2排放量的影响。以从厦门港到盐田港的干散货运输为例,做了节能减排计算分析,并将结果与用其他方法获得的结果对比。在此基础上,对公路运输与水路运输节能减排做了敏感性分析研究,可以计算出能够体现水路运输节能减排优势的临界货运量。结果表明本文中介绍的方法能够为核算、比较公路运输与水路运输的节能减排效果提供更科学的量化参考。     

Resilience and accessibility of Swedish and Dutch municipalities

Recent years have shown a rising popularity of the concept of resilience—both theoretically and empirically—in complex systems analysis. There is also a rising literature on resilience in the transport and spatial-economic field. The pluriform interpretation of resilience (e.g., engineering vs. ecological resilience) is related to methodological differences (e.g., stability in dynamics vs. evolutionary adaptivity). But in all cases the fundamental question is whether a complex system that is subjected to an external shock is able to recover, and if so, to which extent. The present paper [Based on presentation from cluster 6 (Accessibility) of the Nectar 2015 conference in Ann Arbour, USA.] aims to add a new dimension to resilience analysis in spatial systems, by addressing in particular the relationship between spatial accessibility at a municipality level and the resilience outcomes of the spatial system concerned. It does so by investigating to which extent accessibility of Swedish and Dutch municipalities has mitigated the local shock absorption from the recent economic recession. In our study the shock absorption capacity of municipal accessibility is estimated by analysing the relevant resilience indicators for the period concerned. In this context, conventional resilience indicators based on either multivariate complex data (in particular, the Foster Resilience Capacity Index) or employment data (in particular, the Martin Resilience-Employment Index) are confronted with spatial connectivity data based on local accessibility measures, so that geographical mobility may be regarded as one of the shock-mitigating factors. The empirical analysis is carried out for two countries which have both proven to be rather shock-resistant during the recent economic crisis, viz. Sweden and The Netherlands. Clearly, the geographical structure of these countries forms a sharp mutual contrast, viz. a spatially dispersed economy with a few distinct urban concentrations versus a spatially dense economy with one major metropolitan centre (the Randstad), respectively. Our experiments are carried out for the 290 municipalities in Sweden and 40 COROPs in The Netherlands. Our research findings show relevant and new insights into differences in the local recovery potential in Sweden and The Netherlands.     

Subjective well-being and travel: retrospect and prospect

Although the improvement of well-being is often an implicitly-assumed goal of many, if not most, public policies, the study of subjective well-being (SWB) and travel has so far been confined to a relatively small segment of the travel behavior community. Accordingly, one main purpose of this paper is to introduce a larger share of the community to some fundamental SWB-related concepts and their application in transportation research, with the goal of attracting others to this rewarding area of study. At the same time, however, I also hope to offer some useful reflections to those already working in this field. After discussing some basic issues of terminology and measurement of SWB, I present from the literature four conceptual models relating travel and subjective well-being. Following one of those models, I review five ways in which travel can influence well-being. I conclude by examining some challenges associated with assessing the impacts of travel on well-being, as well as challenges associated with applying what we learn to policy.

     

科技创新与公共自行车系统发展

城市公共自行车的发展已经历了三代,正向着第四代公共自行车系统发展。为探究科技创新在其发展过程中所起的作用,高新技术是否能够从根本上解决中国城市公共自行车损坏率过高的问题,以及高新技术在新一代公共自行车系统中的发展方向,笔者通过对城市公共自行车系统发展历程的回顾,发现科技创新在公共自行车系统发展过程中起到了积极的推动作用,但不能从根本上解决车辆被盗和损坏的问题。进一步分析了高新科技对公共自行车系统的利弊,指出需要因地制宜的发展项目,不应一味的追求高新技术在系统中的应用。最后展望第四代公共自行车发展,探索了与公共自行车系统相关的高新技术下一步的发展方向。     

材料节约与循环利用专项行动计划技术成果简介

当前，加快建设资源节约型、环境友好型社会已提升为国家战略。交通运输部为加快建设资源节约型、环境友好型交通，组织开展了“材料节约与循环利用专项行动计划”。通过专项行动大力推广路面再生技术、废胎胶粉筑路应用技术、机制砂混凝土技术以及聚合物改性水泥混凝土技术等西部交通建设科技项目成果，以为交通建设资源的高效利用和循环使用提供示范。本刊现以专栏形式介绍上述成果的相关内容，以飨读者。     

隧道及地下工程结构防排水技术的发展和应用

文章总结了大瑶山隧道修建以来其复合式衬砌结构防排水试验研究和应用情况,介绍了塑料防水隔离层的防水机理及各种防水型式的优缺点,提出了改进建议.