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停车收费是调节城市居民出行结构,改善城市交通状况的重要政策,不同停车收费标准对居民出行方式改变程度也不相同. 本文结合南京市停车特征调查数据,基于非集计模型理论,建立包括停车费率以及公交票价等多因素的出行方式选择模型,并利用弹性分析方法,研究居民出行方式选择随停车费率变化的趋势,分析出行方式选择对于停车费率以及公交票价变化的敏感性. 研究得出不同费率标准下,小汽车及公交车出行比例的改变程度,确定停车收费价格的敏感区间,并分别得到停车费率和公交票价变化对出行方式改变的弹性. 研究结论可以为大城市合理制定停车收费价格政策提供理论依据.     

Determining strategies to increase response rates in transport surveys of small shop-based businesses

Increasing representation of small business perspectives in policy research would benefit from identifying strategies to increase response rates. Despite the significance of the issue, there is inconsistent reporting amongst small business research about issues such as sampling, recruitment and survey design. Reporting on such issues may help address the under-representation of small business respondents and help reduce wasting research resources on less effective strategies. For policy matters that have the potential to disrupt how small business owners run their business, this is of particular importance. This paper reports on a survey of small businesses about changes to the transport accessibility features of a town centre that have the potential to affect the supply of car parking. Based on a review of the available literature, strategies were adopted to reduce respondent burden and maximise engagement. The paper presents an analysis of recruitment approaches in the first wave of the survey and demonstrates how the refinements to the recruitment approach were successful in achieving an increase in response rate from 40% to 47%.     

城市道路主辅停靠站设置方法与停靠能力研究

主辅公交停靠站的设置是解决城市多线路公交停靠交通问题的主要途径。对多线路公交在交叉口出口和路段中采用合理的主辅停靠站的组合形式、有效泊位数、通行能力进行探讨和分析,提出依据不同城市道路断面和等级,设置合理的主辅停靠站的组合形式,建立模型分析主辅停靠站之间的干扰,确定干扰系数,以使有效泊位数和通行能力最优。以实例进行应用分析。     

调车作业单无线传输数据编码与纠错的研究

在分析编组站调车作业现状及存在问题的基础上,阐述了开发无线传输调车作业通知单中数据编码与纠错的原理、方法,以及在运用中的效果.     

基于预信号控制的十字路口快速公交优先通行研究

本文首先对基于预信号控制的十字路口BRT车辆优先通行进口道设置方法、BRT车辆停靠规则、主信号与预信号停车线之间的距离进行了研究,然后对主信号相位、相序及其与预信号配时的相互协调进行了分析,最后提出了基于预信号控制的十字路口BRT车辆在时间上享有优先通行权的设置方法.     

新能源汽车续驶里程焦虑及维修技术研究

续驶里程焦虑是新能源汽车售后市场抱怨最多的问题。文章从售后角度分析了导致续驶里程焦虑的原因及维修排查技术,提出了一些建议性措施。旨在为售后相关人员提供一定的理论指导,从而推动售后市场更好的发展。     

动面生锈对低里程制动抖动现象的影响研究

基于某车型持续出现的低里程制动抖动现象的调查研究,分析了该车型出现低里程制动抖动的可能性原因。通过盐雾处理模拟制动盘自然锈蚀过程,并实车路试再现了该车型低里程制动抖动发生过程,提出了制动面生锈不均匀是造成低里程制动抖动的主要原因的结论。     

某微型客车在匹配新发动机过程中离合器的匹配校核

结合某款微型客车在开发过程中离合器的选型设计以及由于经济性优化进行传动比调整后,对离合器性能参数变化造成的影响,分析讨论了传动速比的匹配对离合器设计的关键影响。     

2015年中国城市轨道交通运营线路统计和分析——中国城市轨道交通“年报快递”之三

对中国截至2015年底的城市轨道交通运营线路进行了统计,给出了2015年中国各城市快速轨道交通和有轨电车的运营线路长度和运营车站数,并按运营线路长度进行排序.对2015年新增运营线路长度及敷设方式构成进行了分析.同时,就2005年至2015年中国内地城市快速轨道交通运营线路的发展情况进行了统计,对每年新增运营线路长度及敷设方式进行分析.     

Sensitive analysis of emission rates in MOVES for developing site-specific emission database

With the rapid social and economic development, vehicle emissions have been identified as a major source of urban air pollutions in China. Therefore, the study on vehicle emission estimations is necessary. In light of the limitation of emission data for establishing a local comprehensive emission database, this paper analyzes the characteristics of emission rates in MOVES released by U.S. Environmental Protection Agency (EPA) to investigate the feasibility and to design a method for developing site-specific emission database. Sensitive analysis for model year, age group and speed interval is performed, and the regularity is concluded. The result shows that emission rates are almost constant with model year, but increase with age groups because of emission deterioration. With respect to speed intervals, the emission rates in 25–50 mph are higher than both those <25 mph and >50 mph in the same VSP (vehicle specific power) bins. In addition, an analysis of local emission data in Beijing is conducted to build the relationship between vehicle activities and emission rates. After that, a comparison of emission rates by VSP bins in MOVES and in local database is conducted in this study. The result shows that the absolute values are different because of regulatory emission standards, fuel quality, and other factors. However, the relative changes described by normalizing emission rates have a good consistency. Hence, the regularities of emission rates by VSP bins in MOVES can be used to develop local emission database in Beijing.