北京地铁八通线调度集中（CTC）系统

本文对北京地铁八通线调度集中系统结构、主要设备构成及系统功能进行了简要介绍。     

航标自动监控系统研讨

本文简述了航标自动监控系统的重要性、框架结构、基本组成和监测内容．对系统的作用距离、可用性、可靠性和我国组建该系统的基本条件等进行了研讨。作者认为,我国组建航标自动监控系统不但必需,而且可行     

浅谈时钟系统在城市轨道交通工程中的应用

对时钟系统在城市轨道交通工程中的应用进行了简单介绍,并详细描述了时钟系统的功能,系统构成以及技术特点。     

应答器功能简介及典型故障分析

结合C2/C3应答器报文定义及运用原则,对有源和无源应答器按功能进行分类,并简述了常用应答器功能及在列控系统中的重要作用。通过分析几例典型应答器故障,使读者初步了解应答器系统并掌握应答器故障的分析方法。     

DCBHQ-S限时断相保护器的使用

简述DCBHQ-S限时断相保护器电路工作原理,及该器件在提速道岔组合电路中的作用和故障判断方法,为用户日常使用、维护提供方便.     

铁路通信网的综合网管系统

介绍铁路通信网的组成,指出综合网管建立的必要性,并对综合网管系统的特点、功能进行分析。     

可调四杆函数发生器的综合

介绍了利用多自由度五杆机构综合四杆可调函数发生器的方法。它可在不改变四杆机构活动构件尺寸的条件下,通过变动五杆机构一连架杆的角位置对所发生的函数进行调整,使四杆机构两连架杆转角在机架两种安装相位下实现两个给定的函数关系。     

美国联邦公路局路阻函数探讨

路阻函数在交通分配过程中左右着路径的选择，目前广泛采用的路阻函数是美国公路局提出的BPB函数．但在交通分配的实践过程中使用美国公路局推荐BPB参数得到的结果并不理想。论文对国内外关于BPB函数的修正模型研究进行了介绍；分析了现存BPB模型的优点与缺陷；提出了BPB函数适用情况的思考。     

VLOOKUP函数在学生信息管理中的应用

电子表格Excel软件作为一种功能强大的数据处理工具，在高校学生管理工作中的应用日益广泛。本文以举例分析的方式探讨Excel工作表中VLOOKUP函数在学生信息管理工作中的运用，证明使用该函数在进行不同数据库的对接和交叉引用时能显著提高工作效率。     

Analysis of plug-in hybrid electric vehicles’ utility factors using GPS-based longitudinal travel data

The benefit of using a PHEV comes from its ability to substitute gasoline with electricity in operation. Defined as the proportion of distance traveled in the electric mode, the utility factor (UF) depends mostly on the battery capacity, but also on many other factors, such as travel pattern and recharging pattern. Conventionally, the UFs are calculated based on the daily vehicle miles traveled (DVMT) by assuming motorists leave home in the morning with a full battery, and no charge occurs before returning home in the evening. Such an assumption, however, ignores the impact of the heterogeneity in both travel and charging behavior, such as going back home more than once in a day, the impact of available charging time, and the price of gasoline and electricity. Moreover, the conventional UFs are based on the National Household Travel Survey (NHTS) data, which are one-day travel data of each sample vehicle. A motorist’s daily travel distance variation is ignored. This paper employs the GPS-based longitudinal travel data (covering 3–18 months) collected from 403 vehicles in the Seattle metropolitan area to investigate how such travel and charging behavior affects UFs. To do this, for each vehicle, we organized trips to a series of home and work related tours. The UFs based on the DVMT are found close to those based on home-to-home tours. On the other hand, it is seen that the workplace charge opportunities significantly increase UFs if the CD range is no more than 40 miles.