市域(郊)铁路车辆选型方案探讨

随着城镇化进程的加快和城市经济辐射能力的增强,以特大城市中心城为核心的都市圈逐渐形成,都市圈内的经济联系更加紧密,都市圈核心区与外围的出行需求迅速增长,市域(郊)铁路的概念被引进,选择符合市域(郊)铁路特点的车辆类型是设计的重点。     

How much are electric vehicles driven?

The prospect for electric vehicles as a climate change solution hinges on their ability to reduce gasoline consumption. But this depends on how many miles electric vehicles are driven and on how many miles would have otherwise been driven in gasoline-powered vehicles. Using newly-available U.S. nationally representative data, this paper finds that electric vehicles are driven considerably fewer miles per year on average than gasoline-powered vehicles. The difference is highly statistically significant and holds for both all-electric and plug-in hybrid vehicles, for both single- and multiple-vehicle households, and both inside and outside California. The paper discusses potential explanations and policy implications. Overall, the evidence suggests that today’s electric vehicles imply smaller environmental benefits than previously believed.     

Reconciling Alternative Theories for the Safety of Owner–Operators

Motor carrier safety is an important concern of shippers, carriers, policy makers, consignees, insurance providers, and the motoring public. One aspect of carrier safety that has garnered substantial attention is whether carriers making greater use of owner–operators are more or less safe vis‐à‐vis carriers making greater use of employee drivers. Currently, conflicting theoretical predictions exist regarding the direction of this relationship. In this article, we offer a reconciliation of the alternative theoretical predictions by developing a coherent theory that merges sociological rational choice theory and theory regarding motor carrier safety. We subject our theory to empirical testing by fitting a series of seemingly unrelated regression models to a vector of safety measures tracked as part of the Federal Motor Carrier Safety Administration's Compliance, Safety, and Accountability program. Our results are consistent with our proposed theory of owner—operator safety and provide meaningful theoretical and managerial implications and directions for future research.     

完全BTO模式下的汽车物流与环境

描述了国内库存在汽车生产厂的上下游积压的现象,汽车生产与客户需求的完全脱节是重要原因,指出BTO是解决这个问题的可行方法,介绍了缩短OTD时间为3天的3daycar系统中可为国内汽车业借鉴的特征,从汽车物流的入厂物流与出厂物流两个方面论述了物流模式改变对环境产生的影响,并提出了为打造可持续发展的汽车物流对策。     

基于人机工程学的汽车驾驶模拟器座椅布置设计

根据人机工程学对汽车驾驶模拟器驾驶员座椅布置的要求,提出H点高度、方向盘、座椅靠背角,视野之间约束关系,应用计算机辅助设计方法,得到H点取值范围,选择合适的位置进行汽车驾驶模拟器驾驶员座椅布置设计.     

论我国资产证券化的风险防范

资产证券化存在着许多风险，尤其在我国，由于缺乏相关的法律法规、市场环境及中介机构，资产证券化的运行会蕴涵着更大的风险。必须充分认识这些风险并采取相应的措施，才能降低我国资产证券化的运行风险，促使我国资产证券化顺利进行。     

我国商业银行不良资产证券化障碍与对策研究

商业银行不良资产问题是现代金融业发展中的一个全球性难题,当前我国商业银行不良资产问题十分严重,文章试图对我国商业银行开展不良资产证券化存在的制度性、技术性和风险性障碍进行了系统研究,然后提出了对我国商业银行不良资产实施证券化的对策。     

电动搬运车辆斩波器的应用分析

介绍以蓄电池和串励直流电动机为动力的电动搬动车辆用斩波器的种类，型号，参数，电路原理和应用情况。     

基于混合优化算法的带时间窗的车辆调度问题求解研究

论文建立了带时间窗的车辆调度问题的数学模型，并针对遗传算法在局部搜索能力方面的不足，提出将模拟退火算法与遗传算法相结合，从而构造了求解车辆调度问题的混合优化算法，并进行了实验计算。计算结果表明，用这种混合优化算法求解车辆调度问题，可以在一定程度上用模拟退火算法突跳性克服遗传算法在局部搜索能力方面的不足，从而得到质量较高的解。     

基于因子分析的汽车上市公司赢利能力评价

运用多元统计中的因子分析法建立赢利能力综合评价模型,并以汽车行业上市公司为研究对象,计算各汽车上市公司的行业内赢利能力得分,分析结果可为投资者投资、择股提供帮助,并为汽车上市公司的经营决策提供一定的决策依据.