车方机床行星轮系机构的设计计算

车方机床用曲率半径很大的椭圆短半轴曲线代替直线切削方形工件。生产率高 ,刀具成本低。选取适当的车头行星轮的分度圆直径 ,可以有效地控制车方原理的直线度误差。对实际工件进行了原理误差的分析计算和行星轮系的设计计算     

石化仿真系统及其应用

仿真系统作为一种现代化的操作技能培训与操作技能考核手段,在各石化企业的应用实践中已经取得了非常好的效果.作者综述了石化仿真系统的现状、应用情况及其发展方向.     

绞线式列车总线原型节点的设计

绞线式列车总线（WTB）是IEC制订的用于列车级车载数据通信的总线标准。本文提出了一种WTB节点设计的框架方案，并设计实现了具备WTB基本功能的原型节点。该原型节点的设计重点放在WTB的核心部分－WTB链路层的软硬件实现，实现了WTB的基本功能，并为进一步开发实用的WTB技术和产品作准备。     

Operator centred design: example of a new driver aid system in the field of rail transport

This paper describes the activities carried out in order to define the relevant information to be specially adapted so as to enable train drivers to comply with train timetables. We shall describe the chosen methodology used and in particular the combined assessments of some fields of desirable future activity. The interface concept used was designed and developed by a multidisciplinary group structured in accordance with concurrent engineering and user centred design principles. The results obtained emphasize the suitability of the method and the necessity of clarifying the emergence of the modification of user strategies, together with the improvement of expertise during empirical evaluations, especially if the product developed has an important impact on a complex socio-technical system.     

CRH1型车异常滑行分析

CRH1型动车组在雨雪天气，轮轨粘着较差的情况下，经常出现异常滑行，主要表现为列车进站超出停车标及触发紧急制动。     

Numerical study on the optimization of smoke ventilation mode at the conjunction area between tunnel track and platform in emergency of a train fire at subway station

To cope with fires in a subway station, ventilation systems are usually installed, which includes an air supply system and a smoke exhaust system. In case of a train fire, the operation of these ventilation systems needs to be studied in order to get optimal control of smoke propagation and provide better environmental conditions for personnel evacuation. In this paper, CFD simulations are carried out by Fire Dynamics Simulator (FDS) to study the effectiveness of different ventilation modes in case of a train fire in a subway station. The temperature and visibility contours are computed as to compare the performance of various ventilation modes for subway stations with full-seal Platform Screen Door (PSD) or half-height safety door. Results show that appropriate activation of the air supply system can improve the efficiency of the ventilation system in smoke control, and vice versa. It is better to activate the lobby air supply system and meanwhile close the platform air supply system. As for the exhaust system, it is necessary to activate the platform exhaust system and the Over Track Exhaust (OTE) system, and it is better to deactivate the Under Platform Exhaust (UPE) system. The optimization strategy of the ventilation mode for subway stations with full-seal PSD is similar to that for subway stations with half-height safety door. With the help of the additional smoke barrier, smoke propagation in a subway station can be well controlled. The results in the paper may serve as a useful reference for the smoke control design in case of subway train fires.     

Dispatching and coordination in multi-area railway traffic management

This paper deals with the development of decision support systems for traffic management of large and busy railway networks in case of severe disturbances. Railway operators typically structure the control of complicated networks into the coordinated control of several local dispatching areas. A dispatcher takes rescheduling decisions on the trains running on its local area while a coordinator addresses global issues that may arise between areas. While several advanced train dispatching models and algorithms have been proposed to support the dispatchers' task, the coordination problem did not receive much attention in the literature on train scheduling. This paper presents new heuristic algorithms for both local dispatching and coordination and compares centralized and distributed procedures to support the task of dispatchers and coordinators. We adopt dispatching procedures driven by optimization algorithms and based on local or global information and decisions. Computational experiments on a Dutch railway network, actually controlled by ten dispatchers, assess the performance of the centralized and distributed procedures. Various traffic disturbances, including entrance delays and blocked tracks, are analyzed on various time horizons of traffic prediction. Results show that the new heuristics clearly improve the global performance of the network with respect to the state of the art.     

列车数字化报站的实现

本文简要介绍了列车数字化报站地面软件的编辑制作和列车上的具体实现，以及目前应用的情况和缺陷，并提出初步的改造建议。     

车轴加工基准定位对轴表面残余应力的影响分析

加工基准对车轴表面加工质量有一定影响,为了定量分析由于偏心切削造成的影响程度,从理论上对加工基准误差与加工后车轴表面残余应力的相对关系进行了分析,针对偏心切削对表面残余应力的影响规律进行了研究。设计了在不同偏心量下的切削加工试验,对切削后试件轴表面残余应力进行了测量,试验结果表明,偏心切削对表面残余应力存在一定影响,但是影响程度不是很大。     

车用汽油机配气机构噪声的研究

本文介绍了EQ6100型发动机配气机构噪声试验结果。讨论了配气机构噪声形成的机理,指出了影响配气机构噪声的因素及降低配气机构噪声的基本途径。