A MIP model for locating slow-charging stations for electric vehicles in urban areas accounting for driver tours

In this paper we propose an improved mathematical model for locating EV charging stations. We consider the successive activities of the travelers, i.e., a person with two main stops during the day should charge the vehicle in just one of the parking spots, hence avoiding double counting the demand. The model is tested for the city of Coimbra (Portugal), where there is a network of nine stations. We conclude that our solution is better than the one that was implemented in reality, moreover we are able to conclude that demand transference has a rather significant impact on the solutions.     

对“电量-重量法”测定煤中碳氢含量的一些探讨

分析"电量-重量法"在检测煤中碳氢含量实验过程中设备损耗,结果偏差等问题产生的原因,提出解决方法。在以国标GB/T476-2008《煤中碳和氢的测定方法》为实验规范的基础上,通过经验的积累,提出进一步完善试验步骤,提高试验效率的方法。     

关于高职电子商务专业学生网上创业及实训的思考

针对目前高职院校电子商务实训教学存在的不足,提出对电子商务专业实施实践教学的基本思路及具体措施。进而指出通过学生网上创业与教学实训相结合,解决电子商务专业学生就业难、就业质量不高与电子商务人才紧缺的矛盾。     

KYN28-12电压柜PT故障分析和处理

针对在6～35 kV的中性点非有效接地系统中可能会产生铁磁谐振现象这一问题,KYN28中置柜通过改进柜体机械结构,采用加装零序电压互感器并在其二次侧加装微机消谐装置的方法,有效地消除和抑制了铁磁谐振现象的产生。     

俄罗斯电动汽车发展现状及趋势

俄罗斯自1970年诞生第一辆纯电动汽车之后数十年,电动车研发与生产基本处于停滞状态。近几年,俄罗斯意识到节能、减排是未来汽车技术发展的主攻方向,其电动汽车产业发展逐渐开始升温。对俄罗斯电动汽车市场发展现状做了概括介绍,对政府出台的扶持政策、配套设施建设等方面进行了分析,展望了俄罗斯电动汽车未来发展前景。俄罗斯汽车制造企业,除研发生产混合动力汽车和纯电动汽车外,也积极同国外合作涉足燃料电池电动车的电池研发。2012年,俄罗斯交通部出台了《俄罗斯普及电动车发展规划》,进一步显示了俄罗斯政府发展电动车行业的决心。     

含胺基聚芴类共轭高分子PFN及其衍生物作为发光二极管电子注入层的研究进展

共轭聚合物[9,9-二辛基芴-9,9-双（N,N-二甲基胺丙基）芴]（PFN）及其电解质衍生物具有与高功函数金属形成有效电子注入的能力,可以用作电子注入层与高功函数金属（如Al、Au等）组成复合阴极,应用在聚合物发光二极管（PLED）中。这类含新型复合阴极的PLED器件具有与目前广泛应用的低功函数金属（如Ba、Ca等）器件相同甚至更高的发光效率。该类电子注入型共轭聚合物及其前驱体只溶解于水、醇等极性溶剂中,而不溶于发光聚合物所易溶的非极性溶剂如甲苯、二甲苯或导电胶所含溶剂,这种特殊的性质可以保证电子注入层与发光层、电子注入层与导电胶层之间在印刷时不会发生互溶而被侵蚀的现象,使得利用高功函数金属的导电胶通过涂覆方式制备PLED的阴极并实现全印刷制造发光器件成为可能。目前,此类高分子材料合成及器件化已成为有机电子学研究的热点之一。本研究论述了国内外在以实现全印刷PLED为目标,以PFN及其衍生物作为电子注入材料方面的研究进展。     

基于灰色关联分析法的电力企业的财务绩效评价

目前电力企业的体制已经发生了变革,已经由垄断的计划经济转变成了市场经济,因此电力企业的财务绩效评价也变得十分重要。本文采用灰色关联分析法对电力企业的财务绩效进行评价,和其他方法相比,主观因素小,是一种较实用的评价方法。     

我国车辆超载现状分析及对策研究

近年来,我国交通运输中超载问题日益严重,已成为危及人民群众生命和国家财产安全的一个突出性社会问题。本文就国内车辆超载的原因、及其造成的危害、治理的对策和建议等四个方面进行了论述。     

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.     

怠速下机动车气体污染物排放水平研究

随着城市机动车保有量的迅速增加,机动车尾气污染已成为影响大气环境质量的一个重要污染源。本文系统监测了不同运行工况(高怠速、怠速)下机动车气体污染物排放水平,系统分析总结了CO和HC两种主要污染物变化规律,对控制机动车气体污染物水平,改善环境空气质量有重要理论和现实意义。