城市轨道交通信号产品认证模式的研究

我国城市轨道交通事业发展迅速,为了规范产品市场准入,建立完善的产品认证制度非常必要。在对国内外铁路信号产品认证模式研究的基础上,探讨适合我国城市轨道交通信号产品的认证模式。针对信号产品安全需求难以完全通过产品检验进行验证的情况,提出采用独立安全评估的方法,并对城市轨道交通信号产品认证工作提出建议。     

Personal travel management: the adoption and consideration of travel‐related strategies

Traveler behavior plays a role in the effectiveness of travel demand management (TDM) policies. Personal travel management is explored in this paper by analyzing individuals' adoption and consideration of 17 travel‐related alternatives in relation to socio‐demographic, mobility, travel‐related attitude, personality and lifestyle preference variables. The sample comprises 1282 commuters living in urban and suburban neighborhoods of the San Francisco Bay Area. Among the findings: females were more likely to have adopted/considered the more ‘costly’ strategies; those with higher mobility were more likely to have adopted/considered travel‐maintaining as well as travel‐reducing strategies; and those who like travel and want to do more are less likely to consider travel‐reducing strategies. These findings, when combined with those of earlier work on this subject, present a compelling argument for the need to further understand traveler behavior – particularly in response to congestion and TDM policies.     

Innovative alternatives take action – Investigating determinants of alternative fuel vehicle adoption

Alternative fuel vehicles (AFVs) as environmentally friendly alternatives to conventional internal combustion engines have gained increasing attention in general public. While empirical studies have begun to explore product-specific factors that drive consumer adoption of AFVs, an integrative framework of a comprehensive set of AFV adoption factors and its theoretical foundation as well as empirical validation is still missing. By drawing on theory of innovation adoption and theory of reasoned action we show that consumers’ perceptions of AFV attributes lead to a general attitude formation towards AFV. In conjunction with consumers’ subjective and personal norm, this in turn determines AFV adoption behavior. Concerning AFV attributes, compatibility, design, and relative advantage of AFVs exhibit the strongest influence on consumers’ attitude formation toward AFV. We derive implications for future research and policy makers. The latter include suggestions on how to develop and communicate AFV in order to stimulate AFV adoption.     

半挂车设计浅析

本文介绍了半挂车技术特点及半挂车在设计过程中需注意的一些事项,运用有限元软件ANSYS对车架模型进行静力学和模态分析,验证了该车型结构安全可靠,为设计半挂车设计提供了参考,减少了设计中问题的发生.     

浅谈三维CAD技术在产品开发设计中的应用

本文讲述了三维CAD技术对产品造型设计的影响,着重介绍了三维CAD-SolidWorks在产品设计中的应用,实现了产品设计的系统化,缩短了产品开发周期。     

高性能混凝土采用强度等级32.5R型水泥的研究与应用

通过科学地选择组成材料及优化混凝土配合比,采用强度等级32.5R 型水泥配制高性能混凝土,并且成功应用于海港工程中。     

立足行业 服务铁路 以质取胜 再创佳绩

回顾和总结了铁道部产品质量监督检验中心2007年在科研、标准化、计量、产品质量监督检验、产品认证、基础设施建设、信息服务和企业文化等方面的工作情况；分析了当前和今后一个时期面临的形势；提出了2008年的主要任务和工作要点。     

真空密封造型中偏皮问题的研究

对真空密封造型的偏皮缺陷产生的机理进行了详细探究,提出的措施实用可靠。     

Teamcenter10.0在汽车车桥集成开发中的应用

Teamcenter10.0软件的实施使汽车车桥产品开发处于平台化、标准化、流程化的工作模式,全面支撑企业基于APQP理念的项目管控模式;实现了与ERP、NX、CAD及OFFICE软件的集成,建立了系统集成应用环境,形成企业信息网,大大降低人工干预、管控的风险;实现了汽车车桥产品研发中全阶段的监控、任务跟踪,降低了产品开发风险、开发周期和开发成本,提升了项目开发效率,能够满足主机厂项目及产品开发理念及节点要求,提升顾客满意度。     

基于STEP标准的船舶工程数据共享研究

本文介绍了在船舶设计和船舶工程研究等多个应用系统中,基于STEP标准的集成产品数据共享环境的基本结构。集成产品信息模型是集成产品数据共享环境的模型,其中目前有的信息模型STEP标准还不能支持,如：CFD,需要从几个相关的应用协议和集成资源扩展而来。本文最后从共享产品数据库的建立和访问两方面概要阐述了信息共享的实现。