我国汽车服务贸易发展现状分析

随着我国加入WTO,汽车服务贸易领域对外开放的步伐得以加快,如果不能及时建立健全既适合我国国情,又能与国际市场运作理念和技术水平接轨的汽车服务贸易体系,将会对我国汽车工业的发展产生极其不利的影响。本文通过对我国汽车服务贸易的发展现状的分析,探究在新汽车贸易政策下我国开展汽车服务贸易的战略选择。     

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.     

How Much Are Car Purchases Driven by Home Equity Withdrawal?

Previous research indicates that changes in housing wealth affect consumer spending on cars. We find that home equity extraction plays only a small role in this relationship. Consumers rarely use funds from equity extraction to purchase a car directly, even during the mid‐2000s’ housing boom; this finding holds across three nationally representative household surveys. We find in credit bureau data that equity extraction does lead to a statistically significant increase in auto loan originations, consistent with equity extraction easing borrowing constraints in the auto loan market. This channel, though, accounts for only a tiny share of overall car purchases.     

Recreation vehicles : A perspective

The growth and popularity of recreation vehicles in the United States and other countries has implications for the travel and tourism industry. Owners of these vehicles require no separate lodging facilities while traveling and rarely patronize hotels or motels. They often perceive that they spend less for their vacations by staying at travel parks and campgrounds, but survey results and comparative cost analysis reveal that they spend more than automobile travelers when total fixed and variable costs are taken into account. Recreation vehicle (RV) preferences by income category suggest alternative modes of recreation travel and a vacation life style which has considerable appeal. This “RV life style” is characterized by a strong desire to experience the outdoors and socialize with other campers while still retaining the comforts and conveniences of a familiar domicile. Limiting characteristics include the provincial nature of recreation vehicle travel and the impact of mandatory fuel conservation measures.     

全自动洗衣机用直联单相盘式电动机的设计

介绍家用波轮型全自动洗衣机用直联单相电容运转盘式电动机的结构特点,主要性能指标以及在 研制过程中遇到的问题。     

Cost savings of using a marketable permit system for regulating light-duty vehicle emissions

In the USA, each individual vehicle is required to meet uniform per-mile emission standards. The uniform standard system does not allow vehicle manufacturers flexibility in achieving overall emission reduction goals for motor vehicles. The system provides manufacturers with little or no incentive to control vehicle emissions beyond what is required. In this paper, an incentive-based marketable permit system is proposed to replace the uniform standard system. Under the marketable permit system, vehicle manufacturers are required to meet corporate average emission standards; they are allowed to buy or sell vehicle emission reduction credits among themselves to meet corporate average standards; and they are allowed to bank vehicle emission reduction credits that are accumulated in earlier years and to use the credits for meeting average standards in later years. It is estimated in this study that relative to the current uniform standard system, the marketable permit system can reduce vehicle emission control costs by $150 to $400 million per year in California, or 13–30% of the costs currently spent on vehicle emission control.     

三相12/8极高压开关磁阻电机设计及仿真

根据开关磁阻电机的工作原理及结构,简要概述了电机参数设计方法、注意事项及步骤,给出了一台12/8极高压开关磁阻电机实验样机参数,利用Ansoft/Maxwell软件对电机参数进行了二维全场域的有限元分析和计算。得出了转矩脉动、绕组电流等波形以及电机磁力线分布、磁通密度云图分布。仿真结果和实验结果验证了参数设计方法的正确性,为今后开关磁阻电机的改进和优化提供了依据。     

小功率开关磁阻电机驱动系统设计

介绍了开关磁阻电机的原理以及本次实验所用到的三相12/8极48 V小功率开关磁阻电机,并以ARM单片机STM32F051为控制核心构成了调速系统,按功率变换器设计要求将MOS管并联使用,并根据选用的MOS管介绍它的驱动电路HIP4086,同时简要介绍了开关磁阻电机调速系统的各部分检测电路、保护电路,最后通过观察堵转和额定时SRM相电流和相电压波形以及对波形进行观察、分析,验证了控制器良好的调速性能。     

安徽省旅游资源错位现象及相对效率评价

文章引入错位指数对旅游业发展的“资源诅咒”现象进行定量研究,结合旅游资源的相对效率评价,提出安徽省各地区旅游资源的开发建议.研究表明:2005、2010年合肥负向错位指数最大,宣城正向错位指数最大;皖中旅游资源总效率受纯技术效率驱动较大,旅游资源利用集约化程度较高,皖北旅游资源总效率受规模效率驱动较大,旅游资源利用属于粗放型方式;区域旅游资源相对效率除了与旅游资源禀赋相关外,与第二产业生产总值、第三产业生产总值、人均GDP、全社会固定资产投资、互联网宽带用户数、货物进出口总额、住宿和餐饮业营业额等因素也密切相关;根据错位指数与总效率的排名,对各地区未来旅游资源开发提出相应的建议.