双曲率车门玻璃的圆环面拟合法

通过对复杂玻璃形面及其运动轨迹的分析,提出一种双曲率玻璃的规范化拟合方法,建立了圆环面车门玻璃的数学模型,从而形成一套从车身外表面光顺、车门玻璃确定到玻璃升降器设计的标准化流程。     

化油器式发动机轿车装用贵金属催化器的试验研究

分别在数种化油器式发动机轿车,对装用圆柱形铂－铑贵金属催化器进行了台架试验和使用试验,以考核无调节混合气浓度功能的催化器降低汽车有害排放物的效果。介绍了试验方案,给出了试验结果对其进行了分析。     

奥拓轿车后制动器间隙自调装置

奥拓微型轿车是引进日本铃木公司Ａｌｔｏ微型轿车技术而生产的,该车的后制动器具有间隙自调功能,而且结构设计有其独到之处。对Ａｌｔｏ微型轿车后制动器自调装置的调节参数和工作原理进行了分析与研究。     

丰田LEXUSLS400型轿车的电子控制悬架

简要介绍了半主动,全主动及慢全主动汽车悬架系统的性能和目前应用情况。以丰田公司生产的凌志ＬＳ４００型轿车的悬架为例,详细分析了上前在高档轿车上的应用较多的半主动电子控制悬架的结构和工作原理,以及该系统的故障自诊功能和失效保护功能。     

沥青洒布车速度误差对洒布精度的影响

本文分析和讨论了后置发动机式沥青洒布车的洒布速度误差与洒布量误差的关系,洒布车速相对误差的限度,最大、最小洒布车速对洒布量误差的影响.     

国外路面清扫车概况

清扫车是高等级路面养护必备的设备之一.本文通过对国外路面清扫车概况的评述,着重介绍了真空式吸扫式清扫车工作装置的布置、风机的联动及除尘设备等关键部分的结构特点和性能参数.     

Direct and indirect influences on employed adults’ travel in the UK: New insights from the National Travel Survey data 2002–2010

Recent years saw a continuing shift in labour force composition, e.g. greater participation of women and a prominent rise in part-time workers. There are as yet relatively few recent studies that examine systematically the influences on the travel of employed adults from such perspectives, particularly regarding possible transport disadvantages of the fastest growing segments of workers. A robust analysis requires systematic data on a wide range of explanatory variables and multiple travel outcomes including accessibility, mobility and trip frequency for different trip purposes. The UK NTS data does meet the majority of this demanding data requirement, but its full use has so far been hampered by methodological difficulties. To overcome complex endogeneity problems, we develop novel, integrated structural equation models (SEMs) to uncover the influences of latent land use characteristics, indirect influences on car ownership, interactions among trip purposes as well as residents’ self-selection and spatial sorting. This general-purpose method provides a new, systematic decomposition of the influences on travel outcomes, where the effects of each variable can be examined in turn with robust error terms. The new insights underline two direct policy implications. First, it highlights the contributions of land use planning and urban design in restraining travel demand in the 2000s, and their increasing influence over the decade. Secondly, it shows that there may still be a large mobility disadvantage among the fastest growing segments of workers, particularly in dense urban areas. This research further investigates trend breaking influences before and after 2007 through grouped SEM models, as a test of the methodology for producing regular and timely updates regarding the main influences on personal travel from a system level.