Light rail or busway? A comparative evaluation for a corridor in Beijing

Like most developing cities, Beijing's public transport is unable to meet demand, but it also faces growing bicycle use. Alternative public transport improvements in a congested corridor of the city — busway, light rail and elevated rail — were modelled and compared in a simple cost-benefit analysis. Complications arose in attempting bus-bicycle modal split modelling and in making due allowance for crowding in a developing country setting. Only the busway showed a positive net present value, but whether the implied withdrawal of roadspace and consequent restraint on the growing number of motorized vehicles is a virtue or not will depend on wider policy considerations.     

浅谈母线槽安装及质量控制

母线槽安装质量的好坏,不仅关系到整个建筑供电系统能否正常运行,还会影响广大群众正常的生活及工厂正常的生产。文章简要阐述了高层建筑及大型厂房中母线槽安装及施工过程质量如何控制问题,并指出要提高母线槽的安装质量就必须狠抓每个施工阶段的质量控制。     

浅谈母线槽的特点及应用

母线槽已广泛用于变电站、大型厂房和高层建筑等供电系统中作为电能的传输和分配设备,具有结构紧凑、通用性强、传输容量大等优点。母线槽通常采用交联热收缩绝缘套管、高强度外壳密封的方法进行绝缘、阻燃,具有可靠的防护措施、灵活多变的连接方式,使得现场安装简便易行。简单介绍了几种新型母线槽的发展现状。