隧道施工通风中射流风机位置对风量的影响

本文详细地介绍了隧道施工射流通风中进入隧洞风量的计算方法,并结合具体算例分析研究了射流风机位置及局扇对进洞风量的影响等问题。     

铁路机务段喷漆库喷漆作业通风方式的研究

针对铁路机务段喷漆作业特点，在分析了国内外对于大型工件喷漆所采取的通风方式的基础上，结合工厂通风经济、有效、节能的发展方向，提出了上送、下排局部均匀流通风方式。通过对气流合理的组织，有效地控制了污染气体的挥发与扩散，达到了保护工人健康的目的。同时对其技术特点和技术关键问题进行了阐述。     

SS9型电力机车微机控制系统

介绍了SS     

铁道行业噪声作业岗位危害程度评价

在调查的２２８个典型岗位中，具有噪声危害的岗位为７１个，占调查总岗位数的３１．１％；其中Ⅰ级有害岗位占噪声有害岗位数的５０．８％Ⅱ级占２５．３％；Ⅲ级占２１．１％；Ⅳ级占２．８％。     

铁路运输企业内涵扩能发展战略的决策与实施

坚持内涵扩大再生产,走挖潜扩能之路,是缓解铁路运输紧张状况,最大限度地扩大运输能力最有效、最现实的办法,也是转变铁路经济增长方式、提高经济增长质量的必由之路。呼和浩特铁路局结合自身实际,从转变全局干部职工的思想观念入手,积极创造深化内涵挖潜的条件,实施以系统优化为核心的内涵扩能发展战略。内涵扩能战略的实施,使呼局生产经营局面发生了深刻变化,改进了运输组织运行机制,挖掘了运输资源潜力,提升了运输组织工作的内在质量,为地区经济和社会发展提供了强有力的运力支撑,也给自身带来了显著的经济效益。     

设计突破建筑创新上海南站呈现新格局

上海铁路南站建筑设计方案实行国际招标,在指导思想、规划原则、设计理念等方面实现了前瞻性的突破。在设计上强调以人为本,改变了以往铁路车站设计以管理为本的思路,打破了铁路车站旅客人流与社会人流隔离分开的传统模式,提出了将国铁、地铁、地面公交换乘通道相互交融的思路。     

(Law for the Promotion of Competition and Consumer Protection) was passed in early 1995. The impact this law will eventually have, however, is uncertain because rules for its implementation have not yet been established.

Governments in their port reform efforts have experimented with liberalization and commercialization to improve port operations. Because of their failure to meet expectations or because of changing competitive environments, these options have generally been discarded in favour of privatization. In mature large-volume port systems, privatization was a relatively obvious solution, because interport or interterminal competition would be achieved to the extent that the monopolistic tendencies characteristic of their predecessor organizations would cease to exist. In countries with a limited number of ports having relatively small cargo volumes, however, the case is quite different. These countries would have to pursue strategies that would still induce competition in spite of their limited cargo volumes if they hoped to achieve the same privatization benefits and market disciplines enjoyed in other countries. This article examines the port reform approaches used in three distinct competitive settings;the experiences in these countries offer some guidance on how to assure that ports will feel competitive pressures even under conditions of limited cargo volumes.     

提速列车车厢内噪声,振动改变的探讨

对３种提速列车进行了车厢内噪声、振动测试，噪声测试结果符合车速每提高１０ｋｍ／ｈ，声级相应增加１～２ｄＢ（Ａ）的规律，噪声频谱峰值主要集中在低频段３１．５Ｈｚ及６３Ｈｚ倍频程中心频率，振动测试Ｚ向振级明显大于Ｙ向，Ｙ向大于Ｘ向，部分车厢座椅无减振作用。     

准高速客运电力机车用脉流牵引电动机

从设计、试制、试验及试运行等几个方面对ＳＳ８型客运电力机车用ＺＤ１１５型脉流牵引电动机进行了介绍。该电机是目前国内功率最大的脉流牵引电动机，其性能优良，技术经济指标先进，结构合理，制造方便，能满足准高速客运电力机车性能的要求     

逆变器供电的异步牵引电机特性曲线的计算

针对普通工频异步电机的特性参数计算方法不适用于逆变器供电的异步牵引电机的问题，对电压源逆变器供电的异步牵引电机动行特性进行了分析并提出了计算方法，具体讨论了不同工况下的电机特性参数的计算，给出了计算实例。