基于轴—辐理论的奇瑞整车销售物流网络构建

轴-辐网络是降低整车销售物流成本的有效网络结构。以奇瑞整车销售物流为研究对象,基于轴-辐理论构建整车销售物流网络。首先运用主成分分析法结合三个定性原则从全国337个地市级以上行政区域中甄选出24个整车销售物流枢纽节点,其次借鉴Dijkstra算法将枢纽节点分为中心枢纽节点、混合枢纽节点、区域枢纽节点三个空间层次,最后引用轴-辐网络原理构建了奇瑞整车销售物流网络,其中干线网络分为主干线、干线、一般干线三个空间层次。分析表明,水运、铁运比重将分别提高34．19％、10．39％,而公路运输比重则下降62．47％,水铁联运的比重占到17．89％,干线物流成本较原先下降16．53％。     

基于车辆工程专业的大学生科技创新能力培养模式研究

高等学校是培养造就高素质和创新型人才的基地,文章紧密结合车辆工程专业,研究探讨大学生科技创新能力的培养模式,指出要形成科学的教育观念,树立正确的教育质量观,积极推进素质教育;要运用科学的教学方式,坚持以人为本,积极培养学生的科学精神和实践能力;要积极构建设以培养大学生科技创新能力为目标的课外学术科技创新活动平台,要加强促进大学生科技创新能力培养的各项制度体系的建设.     

Singapore''s experience with car quotas: Issues and policy processes

This paper examines the policy processes behind Singapore's car quotas. The policy, when filtered through the market mechanism, had a number of unintended consequences. The public's unhappiness with certain features and ‘loopholes’ of the system resulted in many changes to the rules. The effects of recent measures to curb speculation on quota premiums are evaluated. Problems with Singapore's Weekend Car Scheme are also discussed. The lesson for transport policy makers elsewhere is that in attempting to deal with the road congestion problem through car ownership policies, an asset market for vehicles should be taken into account.     

Commodity prices as payment vehicles in valuation experiments

Many contingent valuation experiments use commodity prices as the payment vehicle. In this note it is shown, in general, that this approach does not allow the investigator to extract the respondent's willingness to pay. However, it is also shown how the valuation question can be formulated so as to yield a commodity price payment vehicle which is equivalent to a lump sum payment.The idea for this paper came while teaching the Royal Economic Society Easter School in Birmingham (March/April 1995). I am grateful to my students for stimulating discussions and comments on the subject. Kerry Smith provided me with (as always) insightful comments on an     

Deaths and hospitalisation from fireworks injuries

Statement of the Problem Little is known about the severity of fireworks injuries and no international reviews have been conducted. This study aimed to document and describe the severity of fireworks injuries and the implications for prevention in several countries. Method This retrospective epidemiological study of fireworks-related deaths and hospitalisations obtained injury surveillance data and vital statistics from Australia, the Netherlands, New Zealand and the United States. Of three further countries approached, none was able to supply the full dataset. Results From 1991 to 1995, there were 22 deaths involving fireworks in the United States, 5 in the Netherlands and none in Australia or New Zealand. Except in 1994, the Netherlands had higher admission rates from fireworks injuries than Australia, New Zealand and the United States. Overall, Australia experienced the lowest admission rates. Australian injuries may also have been less severe. Males and children <15 years of age accounted for most admissions. Fatal injuries were mostly to males aged 15-44 years. Conclusions Deaths from fireworks injuries are rare in Australia and New Zealand. Differences in rates and in some characteristics of admitted cases were observed between countries. This study should serve as a benchmark and a pilot to future studies. International comparisons will require enhanced epidemiological data, possibly by collaborative prospective data collection, with appropriate quality control, rather than routinely collected data. Such studies should include developing countries, where the manufacture and use of fireworks is widespread. Since differences may relate to regulatory control and exposure, these should be documented.     

篮球比赛中常见的心理障碍分析及其克服

分析了现代篮球比赛中运动员常见的心理障碍,包括认知偏差、外部刺激、角色争执以及罚球时的心理障碍、比分领先落后时的临场心理特征等;并针对性地提出了应对措施;特别指出教练在平时对运动员进行技术和体能训练的同时必须重视心理训练,以提高运动员的综合素质,取得更好的竞技成绩。     

鞋子是非同寻常的时尚配件

服装的主体性和整体性决定了鞋子成为服饰配件的地位。本文分析和探讨了鞋子在人的整体着装中的地位,以及鞋子作为服饰配件与服装的密切联系。     

解读美国最新的智能电网政策

美国国家科学和技术委员会2011年6月发布了“21世纪电网的政策框架：确保未来的能源安全”报告。综合美国电力行业的发展现状，解读了美国最新的智能电网政策的4个支柱。分析认为，该政策的实施需要联邦和州政府、监管者、决策者、电力公司、产品开发商及消费者在智能电网的发展中发挥作用，在具体如何进行智能电网的开发与部署方面，参与各方应具有一定的灵活性。     

汽车驾驶模拟器控制系统设计

在汽车驾驶模拟器中,传感控制系统的性能直接影响到整个汽车驾驶模拟系统的交互性和实时性,是衡量汽车驾驶模拟器实用性能的重要指标。而数据采集和处理系统又是整个传感控制系统的核心。基于单片机的数据采集系统成本相对较低,接口的可扩展性好,同时,模拟量和开关量的预处理工作也可以由单片机来完成。系统完全可以满足汽车驾驶模拟器的交互性和实时性要求,在实际应用中取得了较好的效果。     

免疫算法在应急物流配送车辆优化调度中的应用

应急物流是处理各类突发事件对物资、人员的需求进行紧急保障的一种特殊物流活动？文章根据应急物流的特点，将免疫算法用于应急物流车辆调度研究中，同时通过算例，证明用免疫算法优化车辆行驶路径的有效性和可行性。