谈船舶应急电源的PSC检查

文中介绍了船舶应急电源系统的结构原理、公约要求，并结合工作实践讲述了系统的检查要点、常见缺陷及处理原则。     

The impact of a congestion pricing exemption on the demand for new energy efficient vehicles in Stockholm

As governments seek to transition to more efficient vehicle fleets, one strategy has been to incentivize ‘green’ vehicle choice by exempting some of these vehicles from road user charges. As an example, to stimulate sales of energy efficient vehicles (EEVs) in Sweden, some of these automobiles were exempted from Stockholm’s congestion tax. In this paper the effect this policy had on the demand for new, privately-owned, exempt EEVs is assessed by first estimating a model of vehicle choice and then by applying this model to simulate vehicle alternative market shares under different policy scenarios. The database used to calibrate the model includes owner-specific demographics merged with vehicle registry data for all new private vehicles registered in Stockholm County during 2008. Characteristics of individuals with a higher propensity to purchase an exempt EEV were identified. The most significant factors included intra-cordon residency (positive), distance from home to the CBD (negative), and commuting across the cordon (positive). By calculating vehicle shares from the vehicle choice model and then comparing these estimates to a simulated scenario where the congestion tax exemption was inactive, the exemption was estimated to have substantially increased the share of newly purchased, private, exempt EEVs in Stockholm by 1.8% (±0.3%; 95% C.I.) to a total share of 18.8%. This amounts to an estimated 10.7% increase in private, exempt EEV purchases during 2008, i.e., 519 privately owned, exempt EEVs.     

“多管齐下,方能解忧”——对改善城市交通环境的思索

结合时代特征,从当前城市交通矛盾的两个主要方面——交通需求和交通供给展开分析,以解决目前特大、大型城市交通拥堵问题。     

大功率GTO门控电源研究

以３０００Ａ／４５００Ｖ ＧＴＯ门控电源为例，对门控电源方式、功率计算等问题进行了较深入的分析，并介绍了该电源的主电路与控制电路设计方法。试验结果表明，该电源电路简单，设计合理，工作可靠。     

提高通信设备供电系统质量的措施

介绍了提高铁路通信设备系统质量的措施及其效果。     

物流中心供配电系统的设计

阐述在物流中心供配电工程设计中的负荷计算、系统主结线方案、设备选型、线路敷设等通常采用的方法和措施。     

牵引变电所继电保护测试软件研究

为了实现牵引变电所继电保护的自动测试,设计了一种新的继电保护测试软件。本文介绍了单体和整组继电器测试数据的处理方法、测试软件系统的数据库逻辑结构及程控电源命令字的生成过程。     

TB880E型隧道掘进机控制系统电源改造

TB880E型隧道掘进机的程序控制系统（PLC系统）庞大而复杂，负责控制、协调整机各部位与系统，保证TBM正常运转，该系统正常运行的一个前提就是必须有一个可靠、稳定的电源。TB880E已经使用或闲置10多年，整机性能全面下降，PLC系统供电电源同样也存在着一些问题，对此，进行深入调查与分析，提出了解决方案并付诸实施，在吐库二线铁路中天山隧道使用中取得了较好的效果。     

集装箱堆场消防参数及消防方式的探讨

通过对集装箱堆场消防系统设计参数的分析论证，提出集装箱堆场的消防设计参数为：消防用水量采用30L/s，火灾延续时间采用4h。根据港区陆域的特殊性，大面积集装箱堆场宜采用移动式消防方式。同时，对集装箱堆场的消防设计提出了相关的优化建议。     

地铁车辆空调系统送风风道分析

结合我国地铁车辆空调系统的设计,从结构和原理上对目前几种主型风道作了详细的介绍和分析。