Knowledge,beliefs and attitudes of squash venue operators relating to use of protective eyewear

Sports venues are in a position to potentially influence the safety practices of their patrons. This study examined the knowledge, beliefs and attitudes of venue operators that could influence the use of protective eyewear by squash players. A 50% random sample of all private and public squash venues affiliated with the Victorian Squash Federation in metropolitan Melbourne was selected. Face-to-face interviews were conducted with 15 squash venue operators during August 2001. Interviews were transcribed and content and thematic analyses were performed. The content of the interviews covered five topics: (1) overall injury risk perception, (2) eye injury occurrence, (3) knowledge, behaviors, attitudes and beliefs associated with protective eyewear, (4) compulsory protective eyewear and (5) availability of protective eyewear at venues. Venue operators were mainly concerned with the severe nature of eye injuries, rather than the relatively low incidence of these injuries. Some venue operators believed that players should wear any eyewear, rather than none at all, and believed that more players should use protective eyewear. Generally, they did not believe that players with higher levels of experience and expertise needed to wear protective eyewear when playing. Only six venues had at least one type of eyewear available for players to hire or borrow or to purchase. Operators expressed a desire to be informed about correct protective eyewear. Appropriate protective eyewear is not readily available at squash venues. Better-informed venue operators may be more likely to provide suitable protective eyewear.     

价值网络视角下纯电动汽车的破坏性创新研究

随着全球化的迅速发展,各行各业的竞争越来越激烈,为寻求自身竞争力的提高,后发企业凭借新的价值网络进行破坏性创新,从而实现对原有企业的冲击或替代。通过市场所要求的性能改善轨线与纯电动汽车技术性能改善轨线的有无交点的方法对我国纯电动汽车开展破坏性创新进行分析,研究发现,虽然充电时间是制约纯电动汽车的最大障碍,但是由于纯电动汽车整个价值网络的支撑和燃油汽车市场的开始衰落,纯电动汽车的破坏性技术已经对燃油汽车市场形成初步的冲击。     

生态界面视角的汽车辅助驾驶交互界面设计研究

生态界面融入汽车辅助驾驶系统交互设计,能够有效增强认知效率,均衡认知负荷;提升信息透明度,简化界面显示;提高信息接受度,反馈动态操作状态。它的界面设计策略是以SRK认知-控制分类法整合信息内容,以目的-手段组织信息架构,以语义映射实现信息可视化,这对可持续的数字界面人机交互设计具有借鉴意义。     

车架的模态分析

本文利用先进的有限元软件Ansys对半挂车车架进行模态分析,得出了车架的固有频率和振型特征。可以通过研究汽车零部件或整车的振动情况,避开这些频率或最大限度地减小对这些频率上的激励[4],可以为该车的进一步研究提供参数。     

汽车远程故障诊断系统研究

文章首先对汽车远程故障诊断的可行性进行了全面分析,提出了系统的框架设计构架,并描述了远程诊断技术的实现方法及远程诊断系统的应用,最后展望了汽车远程故障诊断在汽车诊断领域中的应用前景。     

Strategic policies and demonstration program of electric vehicle in China

Recent Chinese economic and energy policies recognize the transportation sector as a key element in the nation's effort to meet its energy and air quality goals. The development of alternative fuel vehicle (AFV) has been considered as a particularly promising strategy. AFV-related policies can be traced back to the eighth Five-Year Plan period (i.e., 1991-1995). All the work during the last twenty years has cumulatively prompted the transition of AFV development from policy-making to actual implementation and from research and development (R&D) to mass production. The year of 2009 is significant for the AFV industry in China in that the central government announced the “Plan on Shaping and Revitalizing the Auto Industry”. This Plan launched a demonstration program of electric vehicle (EV) deployment in 13 Chinese cities and set the national goal of manufacturing 0.5 million AFVs in three years. To better understand the current status, problems and uncertainties existed in the EV deployment in China, this paper reviewed the relevant policies and reported a survey with the pilot cities during the summer of 2009. Based on the survey findings, this paper developed a number of recommendations to help address the issues found in the demonstration program to date.     

服务连锁零售企业的配送中心内越库车辆调度研究

合理安排入库车辆到库时间对于保证服务连锁零售企业的配送中心内货物顺利流转和降低成本至关重要。在假设只有一个入库门和一条传送带的越库环境下,将卸货和分拣的过程视为两阶段流水作业,应用约翰逊算法求解货物(工件)工时跨度最小化问题。根据某配送中心的excel订单数据,求得中心将该批货物分拣完毕需要的最短时间,并确定最佳入库车辆到库顺序,为企业越库实践提供指导。     

基于RFID技术的物联网物流车载终端系统的开发与应用

介绍了一种基于RFID技术的物联网物流车载终端系统,主要对该系统的系统分析与结构设计,硬件设计和软件系统设计内容进行了介绍。     

时变路网无能力约束车辆路径优化

讨论了一类时变路网下的无能力约束车辆配送路径优化问题,建立了基于时变路网的以配送总耗时最短为优化目标的无能力约束车辆配送路径优化模型。提出了基于实时Dijkstra算法的模型求解方法。数值算例表明考虑路网时变特性得到的优化配送方案将更加符合配送实际。     

ETC中基于RFID的双标签汽车牌照自动识别系统研究

目的:设计适用于ETC中的汽车牌照自动识别系统。方法:分析原有ETC系统的工作原理和弊端与不足,提出了基于RFID双标签的汽车牌照识别系统。结果:从理论分析可以得出本文提出的方法可以有效的克服原有ETC系统中的问题———如牌照识别率太低和跟车干扰情况严重等。结论:本文提出的RFID双标签汽车牌照自动识别系统能有效克服原有ETC系统中的弊端和不足,有一定的实践应用价值。