数字化牵引变电所研究

分别对通信网络和系统标准系列IEC61850、数据和通信安全标准IEC62351以及智能告警专家系统的内容和特点进行了描述和分析,并在国内发展现状的基础上对基于IEC61850标准的全新的牵引变电所监控软件提出了明确的研究内容及实施方案。     

高校办公自动化建设的探讨

随着计算机及网络技术的迅速发展,办公自动化逐步在高校得以普遍应用,提高了高校管理的效率,但也面临着一些制约的因素。本文简述了高校办公自动化建设的必要性,分析了目前高校办公自动化建设的现状,对其存在的问题,提出了相应的对策。     

北美行车自动化系统ATCS的述评与功能分析

综述北美铁路行自动化系统ＡＴＣＳ的构成的特点，ＡＴＣＳ的目的是利用当今的高新技术，改造现有的行车与调度控制系统，以全面提高铁路运输的安全，有效和经济性，文中还介绍了ＡＴＣＳ系统的一些主要功能部件，分析了文书诉功能和特点，并提出了我在我国如何开展行车自动化系统研究的一些思考。     

对城市轨道交通自动化系统的再认识一概念、体系结构与技术

在对城市轨道交通系统的特点进行分析的基础上,提出了轨道交通系统的五大技术需求,论述了城市轨道交通自动化系统的设计开发理念和方法。通过对传统体系结构进行分析比较,指出自律分布体系结构是城市轨道交通自动化系统的理想结构。最后对自律分布系统技术进行了综述,并从技术成熟性和技术特点的角度对其进行了分析和讨论。     

配电网络自动化关键技术分析

针对电力系统配电自动化要求,提出了配电网的合理规划要求,对设备开关的选型和控制室与各开关、断路器之间的数据通信进行了分析,提出了分布智能模式和集中智能模式的应用场合,并对两种模式的优缺点进行了分析。     

Hierarchical model predictive control for multi-lane motorways in presence of Vehicle Automation and Communication Systems

A widespread deployment of vehicle automation and communication systems (VACS) is expected in the next years. This may lead to improvements in traffic management efficiency because of the novel possibilities of using VACS both as sensors and as actuators, as well as of a variety of new communications channels (vehicle-to-vehicles, vehicle-to-infrastructure) and related opportunities. To achieve this traffic flow efficiency, appropriate studies, developing potential control strategies to exploit the VACS availability, are essential. This paper describes a hierarchical model predictive control framework that can be used for the coordinated and integrated control of a motorway system, considering that an amount of vehicles are equipped with specific VACS. The concept employs and exploits the synergistic (integrated) action of a number of old and new control measures, including ramp metering, vehicle speed control, and lane changing control at a macroscopic level. The effectiveness and the computational feasibility of the proposed approach are demonstrated via microscopic simulation for a variety of penetration rates of equipped vehicles.     

Automated cars: Queue discharge at signalized intersections with ‘Assured-Clear-Distance-Ahead’ driving strategies

This study addresses the impacts of automated cars on traffic flow at signalized intersections. We develop and subsequently employ a deterministic simulation model of the kinematics of automated cars at a signalized intersection approach, when proceeding forward from a stationary queue at the beginning of a signal phase. In the discrete-time simulation, each vehicle pursues an operational strategy that is consistent with the ‘Assured Clear Distance Ahead’ criterion: each vehicle limits its speed and spacing from the vehicle ahead of it by its objective of not striking it, regardless of whether or not the future behavior of the vehicle ahead is cooperative. The simulation incorporates a set of assumptions regarding the values of operational parameters that will govern automated cars’ kinematics in the immediate future, which are sourced from the relevant literature.We report several findings of note. First, under a set of assumed ‘central’ (i.e. most plausible) parameter values, the time requirement to process a standing queue of ten vehicles is decreased by 25% relative to human driven vehicles. Second, it was found that the standard queue discharge model for human–driven cars does not directly transfer to queue discharge of automated vehicles. Third, a wet roadway surface may result in an increase in capacity at signalized intersections. Fourth, a specific form of vehicle-to-vehicle (V2V) communications that allows all automated vehicles in the stationary queue to begin moving simultaneously at the beginning of a signal phase provides relatively minor increases in capacity in this analysis. Fifth, in recognition of uncertainty regarding the value of each operational parameter, we identify (via scenario analysis, calculation of arc elasticities, and Monte-Carlo methods) the relative sensitivity of overall traffic flow efficiency to the value of each operational parameter.This study comprises an incremental step towards the broader objective of adapting standard techniques for analyzing traffic operations to account for the capabilities of automated vehicles.     

以行车指挥为主的有轨电车综合自动化平台方案

从结构设计和接口设计两方面,阐述了以行车指挥为主的有轨电车综合自动化平台方案。该方案基于系统工程理论,将行车管理、运营综合监控、设备维护、网络管理等功能集成到一个统一的平台上,实现各系统之间的信息互通和资源共享,高效实现各系统之间的联动,从而提高有轨电车服务质量和服务水平。目前,该建设方案已逐步在多条有轨电车线路中采用。     

石长铁路办公自动化系统

全面介绍了基于Lotus Domino/Notes的石长铁路办公自动化系统的平台与网络结构、系统功能及特点、技术要点.     

基于公文信息处理的OA模式的设计与实现

通过分析以工作流为核心的公文流转信息集成系统,探讨实施一种新的OA模式-基于公文信息处理的办公自动化.公文信息处理办公自动化是利用打字(文印)室电子原文为信息源,通过信息处理系统将Word200x/Wps200x内码文件转换成文本文件、全文搜索该文本文件并截取相关的关键字段、自动建库、保留原文,最终实现信息共享,确保公文信息的规范性、时效性和准确性.