俄罗斯铁路的微机联锁系统

简要回顾俄罗斯铁路联锁系统的发展历史，对继电器成本进行了经济有效性比较，介绍俄罗斯铁路微机联锁系统的组成。     

小型移动式气压焊在城铁无缝线路施工中的应用

北京城市铁路的施工具有交叉作业多、工期要求紧等特点。文章介绍在低温条件下采用小型移动式气压焊进行无缝线路钢轨焊接的工艺流程及防护措施。     

60kg/m钢轨9号道岔系列的设计开发

介绍道岔系列的主要特点 :采用直线型尖轨、全弹性扣件、各部轨距可调 ,充分考虑了城铁工程采用的四种道岔的部件通用性 ,并按城铁的车辆构造和运营特点等设计轨距 ,使列车过岔更平稳。     

ZD6型电动转辙机的调整方法

道岔转辙设备是铁路运输中最关键的设备之一,经常处于动态应用之中,和静态固定的设备相比,具有调整难、易变化、易受外界气候条件干扰等特点.     

Delay Restoration of Single-Track Railway Rescheduling

On the basis of analysis of the principle of delay restoration in a disturbed schedule, a heuristic algorithm for rescheduling trains is developed by restoring the total delay of the disturbed schedule. A discrete event topologic model is derived from the original undisturbed train diagram and a back propagation analysis method is used to label the maximum buffer time of each point in the model. In order to analyze the principle of delay restoration, the concept of critical delay is developed from the labeled maximum buffer time. The critical delay is the critical point of successful delay restoration. All the disturbed trains are classified into the strong-delayed trains and the weak-delayed trains by the criterion of the critical delay. Only the latter, in which actual delay is less than its critical delay, can be adjusted to a normal running state during time horizon considered. The heuristic algorithm is used to restore all the disturbed trains according to their critical details. The cores of the algorithm are the iterative repair technique and two repair methods for the two kinds of trains. The algorithm searches iteratively the space of possible conflicts caused by disturbed trains using an earfiest-delay-first heuristics and always attempts to repair the earliest constraint violation. The algorithm adjusts the weak-delayed trains directly back to the normal running state using the buffer time of the original train diagram. For the strong-delayed trains,the algorithm uses an utility function with some weighted attributes to determine the dynamic priority of the trains, and resolves the conflict according to the calculated dynamic priority. In the end, the experimental results show that the algorithm produces ＂good enough＂ schedules effectively and efficiently in disturbed situations.     

小型气压焊60KgPD3钢轨焊接试验方法综述

成都工务大修段采用小型移动式气压焊设备，与西南交通大学联合立题攻关，开展对60KgPD3钢轨的焊接试验，经不断优化焊接工艺，对近300个焊头的焊接试验，最终解决了焊接落锤质量不合格的关键难题，获得稳定的落锤质量。2001年度，60KgPD3钢轨已成渝、成昆铁路大修地段铺设无缝线路的工地焊接头上使用。     

SS3B固定重联机车的研制

系统介绍了由2节SS3B机车经过技术改造成12轴重载货运SS3B固定重联机车；重点介绍了机车的主要结构、性能参数和总体布置，同时简述了机车的主要系统和特点。试验表明，机车的改造是成功的。     

单片微机在地基系数测试中的应用

介绍单片微机用于地基系数测试装置中的特点,以及该测试系统的硬、软件设计原理.