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251.
汽车轮胎侧偏特性影响因素的试验研究   总被引:3,自引:0,他引:3  
应用轮胎静力学特性试验机,研究了低速条件下3种不同胎面花纹轮胎在干燥路面上的侧偏特性,主要分析了胎面花纹、轮胎负荷和轮胎气压等因素对轮胎侧偏特性的影响。结果表明:轮胎的Fy-α关系曲线形状与胎面花纹形式、轮胎负荷和胎压等均无关。而Mz-α关系曲线变化趋势与胎面花纹无关,却与轮胎负荷和气压有关;在相同试验条件下,顺向花纹轮胎具有更优异的附着性能和侧偏特性。  相似文献   
252.
城市交通控制与诱导系统协同效果评价方法   总被引:1,自引:0,他引:1  
根据交通控制与诱导协同的内容和特点,从交通通行能力改善,交通安全改善,提高交通网络负荷均衡性,降低能源消耗与环境污染等4个方面建立了协同效果评价指标体系;提出了评价指标的量化方法以及基于单纯矩阵法的指标权重计算方法。给出了综合评价模型;利用Paramics仿真软件进行了仿真数据验证,仿真结果表明:此评价指标体系及评价方法科学有效,交通控制与诱导协同后,对交通系统综合改善效果显著。  相似文献   
253.
针对临近原一线船闸建筑物的扩建船闸挡墙高、变形要求严格、施工条件复杂、施工期兼做船闸围堰等技术难点,经比选提出胸墙式双排桩结构形式,采用有限元法分析了其受力特性。监测表明,相对传统结构形式,该结构桩身受力和变形均较小,对临近现有建筑物的安全有保障,在类似边界条件的工程中具有推广价值。  相似文献   
254.
专业核心课程是专业教学改革的核心,是构建人才培养方案的基本单元,也是实现高职人才培养目标的基础。以高职交通土建类专业的核心课程为研究对象,通过分析专业核心课程的内涵及其地位,提出了以工作任务为导向的专业核心课程教学改革思路以及构建专业核心课程的主要内容和方法。  相似文献   
255.
This paper reports the results of a scenario-based simulation study to explore mobility effects of an aging society in the Netherlands. Four accumulative behavioral scenario variants, embedded in an economic and demographic scenario are used to simulate possible future activity-travel patterns, using the Albatross system as the simulator. The variants account for likely differences in activity-travel behavior between elderly today and elderly in the future. Trends ongoing over the last decade in the Netherlands suggest that future elderly need to work longer, change their activity pattern with most growth occurring in the social/leisure activity category, will try to avoid morning peak hours by rescheduling their activities and may introduce more spatial diversity in terms of their residence location. Results show that these behavioral and spatial changes lead to a significant increase in travel demands as well as temporal, spatial and modal shifts in mobility patterns. We discuss possible policy implications of these predictions and evaluate the specific strength of activity-based models for studies of this kind.
Theo ArentzeEmail:

Theo Arentze   received a Ph.D. in Decision Support Systems for urban planning from the Eindhoven University of Technology. He is now an Associate Professor at the Urban Planning Group at the same university. His main fields of expertise and current research interests are activity-based modeling, discrete choice modeling, knowledge discovery and learning-based systems, and decision support systems with applications in urban and transport planning. Harry Timmermans   (1952) holds a Ph.D. degree in Geography/Urban and Regional Planning. He studied at the Catholic University of Nijmegen, The Netherlands. Since 1976 he is affiliated with the Faculty of Architecture, Building and Planning of the Eindhoven University of Technology, The Netherlands. First as an assistant professor of Quantitative and Urban Geography, later as an associate professor of Urban Planning Research. In 1986 he was appointed chaired professor of Urban Planning at the same institute. In 1992 he founded the European Institute of Retailing and Services Studies (EIRASS) in Eindhoven, the Netherlands (a sister-institute of the Canadian Institute of Retailing and Services Studies). His main research interests concern the study of human judgement and choice processes, mathematical modelling of urban systems and spatial interaction and choice patterns and the development of decision support and expert systems for application in urban planning. He has published several books and many articles in journals in the fields of Marketing, Urban Planning, Architecture and Urban Design, Geography, Environmental Psychology, Transportation Research, Urban and Regional Economics, Urban Sociology, Leisure Sciences and Computer Science. Peter Jorritsma   graduated in 1981 as a Traffic Engineer and in 1987 as MSc in Economic Geography at the University of Groningen. After a 2-year period as researcher at the Faculty of Spatial Sciences of the University of Groningen he started in 1989 a career at the Dutch Ministry of Transport, Public Planning and Water Management. Within the Ministry, Peter Jorritsma worked within different research departments. The focus of his research work was on (inter)national public transport issues, spatial planning in relation to transport, travel behaviour in common and travel behaviour of different groups in society (elderly, immigrants, women). Since 2006 Peter Jorritsma is working for the KiM Netherlands Institute for Transport Policy Analysis, a scientific research institute within the Ministry of Transport. Marie-José Olde Kalter   graduated in 1997 as MSc in Traffic and Transport Engineering at the University of Twente. She started her career at Goudappel Coffeng BV, a traffic and transport consultant for public and private parties. Within Goudappel Coffeng, Marie-José was the first 3 years concerned with developing transport models to forecast the future use of infrastructure given different scenario’s and policy measures. After this period she specialized in qualitative and quantitative research methods. In 2005 she continued her career at the Dutch Ministry of Transport, Strategic Modeling and Forecasting. Since 2006 is Marie-José working for the KiM Netherlands Institute for Transport Policy Analysis, a scientific research institute within the Ministry of Transport. She is mainly involved in qualitative and quantitative research related to travel behaviour. Arnout Schoemakers   graduated in 1998 as MSc in Environmental and Infrastructure Planning at the University of Groningen. He started his career at AGV, a traffic and transport consultant for public and private parties. Within AGV, Arnout was concerned with developing land-use and transportation models to forecast the future use of infrastructure and land-use given different scenario’s and policy measures. In 2002 he continued his career at the Dutch Ministry of Transport, Strategic Modeling and Forecasting. At this Ministry Arnout was project manager of the new developed LUTI model TIGRIS XL and the activity based model ALBATROSS. Since 2008 Arnout is working at Oranjewoud, a stock-noted leading consultancy and engineering firm. He is mainly involved developing and using transport models, and in designing processes how to use these model systems in the Dutch planning system.  相似文献   
256.
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2008北京奥运会,面向公众的交通信息服务为奥运交通保障发挥了重要作用。本文提出了北京奥运公众交通信息服务的体系框架,对服务于奥运的北京市道路交通诱导VMS发布系统和北京市公众交通出行信息服务系统进行了系统说明,总结前者在信息来源、系统控制和发布、外场和中心诱导等5方面的主要技术特点,介绍了北京公众出行网的信息发布等5项主要服务内容和“交通眼”5项特色服务项目,最后还探讨了开展公众交通信息服务的有关问题。  相似文献   
257.
摘 要;中段接力制导作战是协同作战的一种具体协同模式.提出基于平台间雷达互测机制与导航信息的目标指令参数误差估计模型.根据平台间的雷达互测机制得到的平台量测和两平台惯导设备输出的自身定位信息,在发射平台的传感器局部坐标系中表示出目标和平台的位置坐标,实现多传感器数据位置对准,并对各平台的设备偏差进行估计和补偿,消除系统误差的影响,提高了各平台的传感器测量数据精度.  相似文献   
258.
讨论一类黑白模式(标准汉字)识别问题.采用Zernike矩不变量作为模式的特征拟定自动识别方案,并通过试验软件进行了实算分析,说明本文所拟定的识别方案是可行的.  相似文献   
259.
260.
对中国城市应用TOD的思考   总被引:1,自引:0,他引:1  
以公共交通为导向的发展策略(Transit Oriented Development,简称TOD)是一种新兴的、节约土地资源、综合效益高的城市发展策略。作为实现城市可持续发展的重要措施,TOD的优势体现在解决城市拥堵、改善人居环境等许多方面。  相似文献   
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