Is awareness of public charging associated with consumer interest in plug-in electric vehicles?

Policymakers often seek to increase the visibility of plug-in electric vehicle (PEV) chargers in public locations in effort to build familiarity and interest in PEVs. However, it is not clear if the visibility of public charging stations actually has an impact on PEV demand. The purposes of the present study are to (1) assess the current levels of visibility for public PEV charging infrastructure within Canada and (2) identify whether or not a statistically significant relationship exists between consumer awareness of public charging infrastructure and interest in purchasing a PEV. We use data collected from a sample of 1739 Canadian new-vehicle buyers in 2013. About 18% of Canadian respondents have seen at least one public charger, while the proportion is highest in British Columbia (31%). We find a significant bivariate relationship between public charger awareness and PEV interest. However, when controlling for multiple explanatory variables in regression analyses, the relationship is weak or non-existent. While perceived existence of at least one charger exhibits no significant relationship with PEV interest, perceived existence of multiple chargers can have a weak but significant relationship. Thus, public charger awareness is not a strong predictor of PEV interest; other variables are more important, such as the availability of level 1 (110/120-volt) charging at home.     

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.     

法德GSM-R系统考察报告

介绍了法国、德国铁路GSM-R通信系统考察情况,以及一点体会,提出建议,希望能起到抛砖引玉的作用.     

汽车动力总成液阻型橡胶隔振器的研究发展

本文对被动式液阻型橡胶悬置及动力总成－液阻悬置系统的设计分析方法和研究成果进行了较系统的述评和总结。首先介绍了汽车动力总成液阻悬置的应用概况，总结，阐述了汽车动力总成悬置系统所要求的理想隔振特性，然后综述了节流孔型，惯性通道型，惯性通道－固定解耦膜型，惯性通道－活动解耦膜型等典型被动式液阻悬置元件的结构原理，集中参数模型，动态特性及其参数设计分析结果，同时综述了动力总成－液阻悬置系统隔振生能研究概况及设计分析方法，其中着重介绍了德国Freudenberg公司，美国Ohio州立大学，日本Nissan公司等主要研究者的研究工作及结果。     

京沪高速铁路CPⅢ监督测量解决方案

对高速铁路及客运专线精密控制施工测量工作进行有效监督提出新的思路。详细介绍CPⅢ平面、高程控制网监督测量的精度指标、技术要求及作业方法。指出,为确保CPⅢ平面控制网和高程控制网的精确可靠,提高高速铁路及客运专线几何线形平顺性极其重要。     

对ISM规则大检查的分析与认识

对持续3个月的ISM规则世界性大检查作认真分析，对船舶管理缺陷、船舶滞留、安全文化及防污染问题提出看法及改进措施。     

辽宁省大学生体质健康30年追踪调查结果分析与未来发展对策研究

采用文献资料法、比较研究法、数理统计法等,揭示辽宁省大学生近30年来体质发展变化趋势,存在的问题,产生的原因,旨在为采取干预对策提供科学依据。     

浅谈测量技术在路面施工中的应用

通过对测量技术在路面施工中应用的必要性探讨,明确测量技术在路面施工中的具体应用,并对未来测量技术在路面施工中的应用进行展望,以期能够更好地促进测量技术在路面施工中的应用。     

罗兰C和卫星导航的组合应用

论述了目前罗兰C和卫星导航组合应用的几种方式,对罗兰C和卫星导航伪距组合定位以及罗兰C和卫星导航定位数据融合的原理和方法进行了论证,通过罗兰C和卫星导航的组合应用,可以克服单一导航系统的弱点,提高组合导航的性能,拓展了罗兰C的应用领域,延长了罗兰C的使用周期。     

水尺计量误差综述

此文对水尺计量中产生误差的原因和影响计量结果的因素进行了分析与总结,并从原理上计算了误差的大小,对于避免或减少航运生产实践中的计量误差、解决贸易争议具有一定的指导意义.