低排放中重型柴油机结构设计技术

结合我国自主开发的“奥威”发动机在设计工作中的理论分析与实践,就低排放中重型商用车柴油机在开发工作中为满足高性能、低排放的要求及在高燃烧爆发压力和高热负荷下正常可靠地工作,对发动机的关键零部件,尤其是缸盖与缸体的设计概念进行了分析。文中引用了大量统计资料,表明了中重型柴油机主要性能参数的演变过程,各种结构方案分析比较以及“奥威”发动机设计的选择。     

基于ABAQUS的某商用车前门轻量化性能优化仿真研究

文章基于有限元法,采用ABAQUS软件,对某商用车前门系统轻量化方案进行了CAE模态分析,抗凹分析及安全分析,分析结果显示,轻量化Opt1方案性能结果相较基础方案接近,减重效果显著.     

基于ADAMS的某商用车悬架KC性能仿真研究

文章基于有限元法,采用ADAMS软件,对某商用车型前后悬架系统进行了KC仿真分析,分析结果显示,各工况下,前后悬架横向刚度满足性能目标,KC性能满足动态属性目标要求.     

基于Nastran某商用车传动轴NVH模态性能仿真和试验研究

传动轴是商用车动力系统关键传动部件,对整车NVH性能有重要影响,文章针对某商用车传动轴进行了模态CAE和试验研究,C AE分析和试验结果表明,此商用车传动轴NVH模态性能满足目标.     

我国汽车营销模式演变趋势的系统动力学研究

在对营销模式内部要素和环境因素分析的基础上,构建汽车营销模式格局演变的系统动力学模型,研究未来几年内我国汽车营销模式的格局在各种内外部因素的共同影响下发展变化的趋势,得出未来5~10年特许经营模式将在我国汽车市场占主导地位,同时其它营销模式将呈现不同的发展态势,并认为营销模式受互联网发展和政策因素影响最显著。     

大深度载人潜水器钛合金框架试验研究

对大深度载人潜水器来说,框架是潜水器的设备载体,不仅要保证框架在各种使用工况下其强度满足要求,而且还要保证框架具有合理的刚度,保证设备、电缆液压管路的正常使用.对框架进行试验验收是检验框架安全性最为重要的环节.由于框架是空间结构,布置的大大小小上百个设备都作用在框架上,在试验过程中对这些设备进行完全载荷模拟和框架变形的测量相当困难.在此之前,我国还没有进行过类似大深度载人潜水器钛合金框架试验.本文的主要目的是介绍和总结这次框架试验.本文所涉及的内容包括载荷的模拟方法,应力、变形的测量方法、试验中可能出现的安全问题及其解决办法,试验岗位的配置,试验的后处理任务等等.同时,本文将试验结果与理论分析进行了比较,对大深度载人潜水器框架结构的安全评估等内容进行了探讨,可供以后的类似试验作为参考依据.     

The impact of urban rail transit on commercial property value: New evidence from Wuhan,China

The interaction between rail transit and the urban property market is a vital foundation for planning transit-based policy such as Value Capture and Transit Oriented Development (TOD). Yet only few studies have reported the impact of transit access on commercial property value. This paper presents empirical evidence from Wuhan, China, to enrich the knowledge in the subject area. Spatial autoregressive models were employed to estimate the commercial value capture, based on 676 observations along Wuhan’s metro rail line through the main business districts. Value appreciation was discovered within the 400 m radius of road network distance from Metro stations. The transit access premiums present as two tiers: 16.7% for the 0–100 m core area and approximately 8.0% within the 100–400 m radius. The result demonstrates the potential benefit of adopting value capture and optimising TOD planning to support sustainable urban rail transit investment. Amid rapid urbanisation in China, the evidence reported here could help better inform cities, across the developing world and beyond, of the benefits of adopting rail transit-based policy.     

Methodology for kinematic cycle characterization of vehicles with fixed routes in urban areas

This paper analyses the driving cycles of a fleet of vehicles with predetermined urban itineraries. Most driving cycles developed for such type of vehicles do not properly address variability among itineraries. Here we develop a polygonal driving cycle that assesses each group of related routes, based on microscopic parameters. It measures the kinematic cycles of the routes traveled by the vehicle fleet, segments cycles into micro-cycles, and characterizes their properties, groups them into clusters with homogeneous kinematic characteristics within their specific micro-cycles, and constructs a standard cycle for each cluster. The process is used to study public bus operations in Madrid.     

商用车前照灯近光照明效果改进

介绍了商用车前照灯近光配光的具体要求和含义,同时以GB 4599-2007为基础,对比国内某商用车前照灯与某进口商用车前照灯近光配光数据,并提出改进方案,提高前照灯近光的照明效果。     

关于商业银行反洗钱工作的思考

文章从利用商业银行实施洗钱活动的复杂形式入手，探讨了商业银行反洗钱工作的现状及意义，提出了反洗钱工作的建议．以促进金融工作稳定有序开展。