基于PCI/CPCI接口的1553B总线模块设计与实现

在概述PCI/CPCI总线的发展、特点及应用的基础上,详细介绍基于PCI/CPCI接口的1553B总线模块的设计方法及其关键技术。     

国产化ATP系统中通信单元的设计与实现

本文介绍了城市轨道交通国产化ATP系统中通信单元的作用、原理及设计方法。     

电涡流缓速器的使用调整与故障排除

介绍电涡流缓速器的使用注意事项、主要调整方法和故障排除的措施。     

三轴客车侧倾中心线的确定及影响

浅析三轴客车的悬架侧倾中心、侧倾轴线的确定方法，提出等效侧倾中心轴线的概念，为解决一些三轴客车轮胎异常磨损提供理论依据。     

一种新型公路客车视频监控系统简介

运用本地录像方式对长途客车进行监控的模式已经不能满足现代化客车运输管理需要.最新设计研发的“公路客车视频监控系统”,主要针对公路客车进行专业化设计,基本解决了本地录像监控系统存在的无法实时监控、容量不够、无法与其他设备连接等不足,被大多数客车运输公司采用.     

客车上部结构强度出口认证检测

对客车倾翻试验出口认证法规进行介绍；结合丰富的出口认证检测经验，为客车厂家进行倾翻试验提供参考；提出客车倾翻试验仿真分析的必要性。     

Showcase软件在客车造型方案评审中的应用

通过对Showcase软件的介绍，阐述了Showcase软件在客车造型方案评审中的应用。     

Organisation form,scale effects and efficiency in the British bus industry

The British bus industry is examined in light of fundamental reform in ownership and regulation. The industry is divided between privately and publicly owned companies, with the private sector further split between publicly listed owned subsidiaries and private limited companies. The change in ownership structure since privatization is analysed, and Data Envelopment Analysis used to estimate the extent of returns to scale and technical efficiency, as defined by one output and three inputs. Technical efficiency is further divided into managerial and organisational components, and comparisons made of median efficiency levels using a Mann Whitney statistical test.Increasing returns to scale are found for smaller companies, but the size of such returns varies with the company type. A minimum efficiency scale is identified, with constant returns above this point. A high degree of technical inefficiency is found to be present in the industry, which may initially suggest a lack of competition and reflect the oligopolistic structure that has emerged since privatisation. Privately owned companies are identified as more technically efficient, however this is due to significantly less organisational constraints, and considerable managerial inefficiency exists in this group. It is finally concluded that the high level of inefficiency may not reflect ownership, but rather industry characteristics, and rather than a lack of competition may be indicative of wasteful competition. It is suggested therefore there may be a need to make the market contestable rather than openly competitive.     

浅谈基于CAN现场总线的数据采集系统

本文以微机监测为例介绍了基于CAN总线的数据采集方案。     

混合动力城市客车燃料电池系统总体设计

讨论了某型城市客车燃料电池系统设计中的关键问题,包括燃料电池、超级电容、电机等关键零部件的参数匹配.通过合理匹配和布置,从而提高了行车可靠性和安全性.