广州地铁1号线供电系统

阐述广州地铁1号线供电系统供电设备选择的原则；分析其运行方式，突出介绍其环网供电和牵引供电特色，并说明了互为备用自投的问题。1号线供电系统至今运行正常，表明其设计及设备选用均是可靠的。     

机车生活电源的研制

提出了一种适合于给机车上的生活电器供电的AC 220V 50Hz辅助电源．阐述了诙电源的工作原理、关键技术及特点，指出该电源具有稳定性好、可靠性高、结构紧凑等优点。     

深圳地铁给排水投资概算分析

介绍了深圳地铁给排水工程的系统构成、内容及概算分析 ,并简述了个人观点 ,以便和同行们进行交流学习。     

90MW晶闸管整流电源现场控制单元研制

针对90MW晶闸管整流电源的系统特点,采用三级控制实现多机组协调工作。详细说明了晶闸管整流电源现场控制单元的功能及硬件构成,并对晶闸管整流电源的控制进行了较深入的探讨。试验结果表明,该控制单元设计合理,完全满足设计要求。     

A block queueing system for slow moving traffic

A common cause of pollution and waste in urban areas is facilities which provide a continuous slow service for motor vehicles. As demand approaches supply, queues can develop and large numbers of engines can often be idling. Typical examples are car park entrances and drive through fast food outlets. This paper proposes a block queueing system to alleviate the problem without using excessive road space and with a minimum of extra infrastructure. The queue is divided into an active section at the front (with engines running) and a passive section at the rear (where drivers switch their engines off). Periodically, as the active queue becomes depleted, the passive queue is momentarily activated and a block of vehicles advances into the active queue. A visual cue can be provided to the drivers using a vehicle actuated traffic signal. It is readily apparent that drivers in the passive queue have to switch their engines on and off at regular intervals. Since this operation has an inherent cost in itself, this argues in favour of a large block size. However, large blocks mean more engines idling in the active queue. A compromise must be therefore reached for the likely range of queue lengths which the system under consideration exhibits. An expression is derived for the optimum block size in steady state conditions. It is shown that the potential benefits of the regime are considerable.     

单轨跨座式交通工程供电系统的特点

介绍了国内第一条单轨跨座式交通工程——重庆轻轨较新线的供电系统构成,论述了牵引网、再生制动能量吸收装置及综合接地系统等各子系统与双轨交通工程不同的技术特点、设计方案,并对中压环网电缆的特殊施工方法进行了比较详尽的介绍。     

某纯电动客车后轮抱死分析及改进

针对客车在行车过程中发生后轮抱死的问题,对某纯电动客车的制动系统进行检测,经过分析与试验找到问题发生的主要原因。通过改进制动管路原理,解决后轮抱死的问题。     

DJJ1型电动车组动力车控制系统改进

针对DJJ1型高速交流传动电动车组(“蓝箭”号)动力车的主要故障类型,分析了其基本工作原理,并提出了控制系统改进方案。     

城轨车辆制造基地直流牵引供电方案研究

针对城轨车辆试验基地对直流牵引电源需求的特殊性,对4种能够实现DC 750 V和DC 1500 V两种直流电源供给的牵引供电方案进行了分析比较,说明了4种方式的优缺点。对于设置2条试验线和1座静调库的试验基地,给出了其直流电源的实现方案。在工程设计过程中需要通过对具体情况分析后,统筹考虑电源实现方式的选取,避免设备投资及安装容量的双重浪费。     

加速器磁铁电源PSO-LQR控制器设计与研究

磁铁电源是加速器的重要组成部分.该设计以磁铁电源为控制对象,并提出了基于PSO的磁铁电源LQR控制器的设计.首先,利用现代控制理论建立了磁铁电源的状态空间模型,而后采用粒子群算法对磁铁电源LQR控制器加权矩阵进行了优化,以保证能够为加速器快速地提供所需的磁场.仿真结果表明,该课题所采用的方法能够满足系统输出快速响应的要求,各项指标优于传统方法所得到的结果.