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.     

重载交通柔性路面结构设计研究与应用

车辆超载是一个普遍存在的问题,对道路路面的正常使用具有很大影响,是道路路面使用初期产生严重破坏的主要原因.结合深南路的路面修缮工程,分析重载交通柔性路面结构修缮所面临的实际问题.     

内蒙古自治区农用地整治潜力研究

本文从数量、质量两方面对全区农用地整治增加耕地潜力进行了系统的测算和评价,就测算结果进行了分析,明确了全区农用地整治增加耕地潜力的分布状况,并从规划、组织领导、资金、政策法律、技术措施等方面提出农用地整治的保障措施.     

油田压裂施工车辆的安全管理

施工车辆是油田压裂施工中不可或缺的一部分,特别是主体泵车、混砂车、仪表车等车辆更是压裂作业中重要的配套设备,车辆安全管理的效果能够直接影响油田井下作业的效率和安全。因此对油田压裂施工车辆的安全管理是井下公司势在必行的措施。     

道路运输行业面向节能减排的I/M制度检测方法研究

I/M制度是保证汽车处于良好的技术状况,投资最少、最有效、最根本的途径。文章介绍了适用于我国道路运输行业现状的I/M制度在实施时所能采用的检测方法。并且对这些检测方法进行了详细的分析及比较。     

低碳经济视野下的新能源汽车发展战略

低碳经济的核心是能源技术和减排技术创新、产业结构和制度创新以及人类生存发展观念的根本性转变。石油能源供给与汽车产业发展的矛盾将日益凸显,新能源汽车发展是涉及国家能源战略的重大问题。我国应创新商业模式,建立产业联盟,加强创新网络组织和消费者导向的盈利模式的构建,加大对新能源汽车行业的政策扶持。     

宁夏唐徕渠灌区可持续发展的探讨

分析了宁夏回族自治区唐徕渠灌区的管理现状和存在的主要问题,提出唐徕渠灌区可持续发展的建议：落实初始水权制度,合理配置水资源;尽快立项解决灌区工程存在的问题;建立科学的管理体制和合理的水价机制;发展节水灌溉,提高灌溉用水的利用效率和效益。     

自主水下航行器导航与定位技术

精确导航与定位对AUV执行水下作业任务的安全性和有效性至关重要.与陆地导航定位相比,由于全球卫星导航系统(GNSS)在水下不可用以及海洋环境的独特物理特性,水下导航定位更具挑战性.近年来用于AUV导航定位的传感器在性能和精度方面有了显著的提升,除此之外,同步定位与地图构建、协同定位算法的日益成熟极大的提升了AUV导航定...     

新能源汽车价格补贴政策的绩效分析和改善建议--以J新能源汽车公司为例

新能源汽车是我国汽车行业重要的发展方向,笔者通过研究我国新能源汽车的发展历程、价格补贴政策存在的问题,提出完善新能源汽车价格补贴政策的对策,以期为我国新能源产业的科学发展和我国汽车产业的转型升级提供参考。     

Gender and regional inequality in human development: the case of Spain1

In this paper, we present estimates of the Human Development Index and the Gender-Related Development Index in the Autonomous Communities of Spain. Our case study of Spain, a developed country with clear gender and regional differences, demonstrates the importance of adjusting human development indices in accordance with gender discrimination and regional inequalities. We also show the significance of the income component in assessing the development level of women in countries like Spain, where lack of employment or low remuneration are the chief characteristics of women's inequality. Our analysis makes clear that the Gender-Related Human Development Index has limited applicability in developed countries; it also illustrates the need for alternative variables or models to assess inequality in those countries.