佛山市摩托车交通特征分析与问题研究

通过对佛山市居民出行特征调查及其数据分析,导出佛山市摩托车出行特征。根据其特性,提出了相应的解决策略,对类似城市摩托车交通问题的解决具有借鉴作用。     

汽车重金属禁用研究

介绍了重金属的危害和汽车产品重金属禁用的法规要求,提出了重金属禁用与替代材料研究的基本原则,阐明了重金属在汽车产品上的使用情况和替代材料的研发进程,指出重金属禁用的实质性要求是推动材料工业的技术创新,强调了欧盟重金属禁用豁免条款对我国汽车工业技术进步的指导性作用。     

A review on motorcycle and rider modelling for steering control

The paper is a review of the state of knowledge and understanding of steering control in motorcycles and of the existing rider models. Motorcycles are well known to have specific instability characteristics, which can detrimentally affect the rider's control, and as such a suitable review of these characteristics is covered in the first instance. Next, early models which mostly treat riding as a regulatory task are considered. A rider applies control based on sensory information available to him/her, predominantly from visual perception of a target path. The review therefore extends to cover also the knowledge and research findings into aspects of road preview control. Here, some more emphasis is placed on recent applications of optimal control and model predictive control to the riding task and the motorcycle–rider interaction. The review concludes with some open questions which naturally present a scope for further study.     

The influence of compliant chassis components on motorcycle dynamics: an historical overview and the potential future impact of carbon fibre

This paper details the influence of compliant chassis components on motorcycle dynamics. Initially, research which has previously been carried out in terms of motorcycle dynamics and in particular the impact of compliant chassis components on motorcycle dynamics is discussed. This paper then considers the consequences of these findings with regard to the use of modern materials such as carbon fibre reinforced plastics and the impact they will potentially have on motorcycle dynamics and its simulation.     

Control effects of steer-by-wire system for motorcycles on lane-keeping performance

This study discusses the control effects of the steer-by-wire (SBW) system for motorcycles on the lane-keeping performance by examining computer simulation with a rider-vehicle system which consists of a simplified vehicle model, a rider control model and the controller of the SBW system. The SBW system, which compensates the rolling angle deviation between the desired rolling angle intended by the rider and the actual rolling angle, improves the lane-keeping performance of the rider-vehicle system under the steering torque disturbance. The SBW system is, on the other hand, not effective in the lane-keeping performance under the lateral force disturbance. In addition, the lane-keeping assistance (LKA) system is applied to the SBW system and the cooperativeness of the SBW and the LKA systems is examined. The LKA system improves the lane-keeping performance of the SBW system under not only the steering torque disturbance but also the lateral force disturbance.     

摩托车发动机凸轮测量常见问题的解决方法

摩托车发动机凸轮型线的测量属于形位公差的测量范畴,应按形位测量要求确定（选择）测量基准。参照GB/T 1182—1996标准要求,凸轮型线形状公差带取决于被测凸轮的理想几何形状和设计要求,并以此来评定凸轮形线的形状误差。测量时,理想凸轮的位置应按＂最小条件＂原则确定,即两同心理想凸轮包容实际凸轮,且两同心理想凸轮间的距离为最小。     

广州市中山大道BRT试验线交通组织设计与思考

该文主要介绍了中山大道BRT走廊沿线的交通组织设计思路和方法,包括公交车辆、社会车辆、行人和非机动车的有效组织,禁左措施应用和信号相位的优化调整等,并对BRT开通后走廊路段和交叉口的运行情况进行了评价。     

基于工艺可行性的离散变量结构动力特性设计优化

基于船舶工艺可行性分析,建立了使用自适应模拟退火算法的多工况下船体结构动力特性设计优化模型;并给出了相应的设计流程。模型使用矩阵描述由板材厚度和骨材型号构成的离散变量集合,同时将全体设计变量处理为共享设计变量。将模型应用于某集装箱船艉部结构的动力特性设计优化中,优化后的结构不仅减轻了自重,而且增加了频率储备。实例分析表明该模型能应用于工程结构的实际优化设计。     

Getting around a license-plate ban: Behavioral responses to Mexico City’s driving restriction

License-plate-based driving restrictions are among the highest profile policies for local governments to address congestion and air pollution. Cities as varied as Sao Paulo, Paris, Tianjin, and New Delhi have enacted temporary or permanent restrictions to improve local air quality. Using household travel survey data and a research design based on the abrupt shift in how the policy applies to 10-year-old vs. 9-year-old vehicles, we evaluate the impact of Hoy No Circula, one of the earliest and most studied driving restrictions, in Mexico City. In line with previous studies, we find that Hoy No Circula has done little to reduce overall vehicle travel, but we reject the prevailing theory that its lack of success is due to perverse incentives for households to buy second cars. Instead, we highlight the range of other, less costly ways that people adjust behavior to avoid the restrictions. Although no single behavior dominates, most households — particularly those that own older, higher-polluting vehicles — do not use their car every weekday regardless of the restriction. As a result, it is relatively easy to shuffle travel from restricted days to unrestricted days and thus avoid the ban. Shuffling travel days is less costly, more immediately available, and far simpler for most households than buying a second car.     

西部公路沿线居民日常出行方式危险牲分析——以G109宁夏（平一中）段为例

西部公路沿线居民日常活动多采用步行、自行车和摩托车三种出行方式，由相关的交通事故统计数据可知，该三种出行方式事故率偏高、事故发生程度严重。从时间分布、年龄、性别、事故类型等方面对三种出行方式对应的交通事故特征进行分析．有利于了解事故形态和事故成因，并提出合理的治理建议。