用全寿命周期成本法选择地铁变压器

本文根据地铁负荷的实际情况,通过对在运营的广州地铁一号线中的实际负荷统计,提出应用设备全寿命周期方法选择地铁系统主变压器、牵引变压器和动力变压器,以达到减少地铁变压器安装容量,降低变压器运行损耗,从而节省建设和运营费用的目的。对地铁供电系统的设计和运营具有一定的参考价值。     

汽车专业学生社会服务与学习有机结合的方法探究

随着当今社会的不断发展和进步,人们对于生活的要求也在不断地提高之中,而作为当今社会中非常重要的汽车工业来说同样也是如此。如今人们社会中汽车作为一种常见的交通工具来说,人们对其的需求量在日益增加之中,在这样的背景下就需要更多且水平更高的汽车技术与服务人员作为后盾,这类人才大多数出自于高职系统之中。高职的教育目的就是为了能够给社会培育出更多专业性的人才,因此在汽车方面也设立了对应的专业。     

西安市交通拥堵和空气污染的成因和政策研究

近年来,西安市交通拥堵和空气污染问题突出。文章旨在分析这两大问题的现状、成因以及现行政策的效果。对于改善拥堵和空气污染,限行政策在短期内有显著效果,燃煤整治明显改善了空气质量。而从长远来看,正面效果会随着机动车数量的增长而逐渐消失。文章将有助于政府进一步针对拥堵和雾霾的长期政策研究。     

Rural environment stakeholders and policy making: Willingness to pay to reduce road transportation pollution impact in the Western Pyrenees

In spite of the strategic national and regional development importance of transportation infrastructures, road transportation is one of the major sources of externalities worldwide. Using data collected from 900 residents living in 14 rural towns near the roads crossing the Spanish Pyrenees, we model citizens’ willingness-to-pay (WTP) to reduce noise and air pollution. We collect the data adopting a contingent valuation method (CVM) design and we analyze the data employing a Zero-Inflated Ordered Probit (ZIOP) model, which allows us to account for an excessive number of zero observations. Our results are in contrast with previous studies’ results with regard to environmental attitudes and socio-economic profiles of residents. Our findings indicate that the stakeholders living near major roads have higher incentives to offset environmental costs. Also, younger, better educated, and more environmentally-aware citizens are willing to pay more to reduce externalities, as they are influenced by their values and environmentally friendly sub-culture, possibly fostered during the past 30 years of green movement worldwide campaigning.     

城市轨道交通PPP模式运用研究

自2014年下半年以来,我国投融资领域发生了一系列深刻变革,轨道交通项目PPP模式运用获得快速发展.通过梳理国内部分已采用和拟采用PPP模式开展城市轨道交通建设的项目,考虑社会资本投资范围、项目公司组建形式等因素,系统总结出国内城市轨道交通领域的7类PPP操作模式,详细分析PPP操作模式的10个核心要点,包括项目公司的组建、各参与者投资范围、特许运营期、各类风险分担方式、投资回报率、政府购买服务方式、监管标准及资产移交等,希望能够为PPP模式在城市轨道交通领域的运用提供有益借鉴.     

Recognising customers' patterns of bus service patronage using a loyalty framework

With the aim of identifying typical characteristics of travellers, traditional segmentation approaches were based on socio-demographic variables. However, the approaches could not reveal the factors motivating individual behaviour. This result led to an emerging interest in psychological research models that are adhered to the decision-making process. Among various related theories, the concept of loyalty was attractive because the major purpose of establishing a loyalty concept is to recognise a customer's pattern towards a given service. However, there were few efforts aimed at determining market segments based on a loyalty framework. In addition, there was no consensus achieved on theoretical loyalty typology due to different empirical findings in different market contexts. This study aims to be the first loyalty-based attempt to provide an operational method of segmenting bus service market. Seeking practical implementation, another focus of this study is to determine typical characteristics of the market segments. Analyses that included cluster techniques were conducted on questionnaire data collected from 333 respondents in Hidaka city, Japan. A cross-classification between relative attitude and service patronage was successfully established, dividing the market into four segments. Segments of loyalty and no-loyalty were observed to be dominant over the remaining market. In contrast, the spurious loyalty segment was small and insignificant. An expansion of the latent loyalty segment was also observed when moving from the intention phase to the actual behaviour phase. Notably, not only demographic factors but also social awareness variables including environmental concern and elderly support were observed to be significant in distinguishing customer segments from one another.     

道路冰雪分类与结构特性研究

冬季道路的表面通常覆盖着多层积雪,重交通量的路段积雪较薄,其厚度一般不足几厘米。积雪状态随着交通量、除雪工作量及气候因素的变化而变化,不同种类的积雪表现出的状态与特点均不同,积雪状态的变化直接影响着路面安全性。根据观测结果将路面积雪分为新雪、雪粉、雪粒、雪板、冰块、冰膜及融雪等7种类型。     

基于互联网的客车企业售后服务系统研究与设计

分析了目前客车生产企业售后服务的现状和存在的问题。针对这些问题,充分利用互联网技术的优势,建立了基于互联网的客车生产企业售后服务管理系统,构建起客车企业和客户之间直接、高效的沟通交流渠道,对提高客车售后服务的深度、广度和及时性方面将起到很大的作用。     

PE生化中水回用处理技术在高速公路服务区的应用效果研究

PE生化中水回用处理技术是一种复合式污水处理技术,该技术为A2/O法与MBR生物反应器两种技术相结合的污水处理新技术,通过对污水入口、A2/O出口以及MBR出口进行水质采样分析,研究该设备污水处理效率得出,该技术最终处理效率可达到90%以上,处理效果较好,出水水质达到《城市污水再利用城市杂用水水质标准》(GB/T 18920—2002)中城市绿化用水标准,具有广泛的推广应用价值。     

地面公交服务效能提升策略研究

地面公交作为我国城市公共交通的主体,在城市交通中扮演重要角色。在机动化、城市化不断发展过程中,地面公交系统应承担起短距离的公共交通出行服务和对骨架交通网络的辅助和补充作用。而目前我国地面公交系统并不能适应城市发展需求,服务效能的提升迫在眉睫。鉴于此,从地面公交结构、地面公交服务质量、地面公交运营机制三方面,结合具体实例城市,分别阐述了地面公交服务效能提升策略,可为相关技术人员提供一定的参考和借鉴。