新一代机车显示平台TPX20系统软件的构建

介绍了采用linux操作系统构建的TPX20显示器软件系统,描述了软件系统的整体架构、内核,并重点讨论了设备驱动和文件系统,以及就机车领域应用特点而进行的优化工作。目前,该系统运行稳定,现场应用效果良好。     

Simulation and discussion on the decreasing flow stress scale effect

The miniaturization of products requires the mass production of microparts. The microforming can well meet this requirement. Due to the emergence of decreasing flow stress scale effect in the micro scale, the traditional forming process and theory may fail. Based on the crystal plasticity theory, upsetting tests of micro copper cylinders with different dimensions and grain sizes were simulated, and the decreasing flow stress scale effect was studied and discussed. Results show that with the decrease of billet dimensions, the flow stress is gradually decreased, and the decreasing flow stress scale effect is emerged; with the increase of grain size, the decreasing flow stress scale effect is more remarkable. It can also be seen that the decreasing flow stress scale effect can be well simulated with the crystal plasticity theory, and the necessary relevant information is provided for deeper understanding on this scale effect, as well as the design of processes and die structures in the microforming.     

基于OracleBIEE水利普查数据展现系统研究

为从多方面清晰、简洁、直观地展现水利普查数据，设计了基于OracleBIEE的水利普查数据展示系统。对水利普查数据的特点以及BIEE架构进行分析描述，在BI管理工具上设计了资料库Repository三层模型，然后通过BIAnswer进行开发设计报表，并统一在仪表盘布局中进行展现。仪表盘的实际运行结果表明了该设计思想的有效性和可行性。     

机舱信息显示系统

应用Visual Basic的网络动态数据交换(NetDDE)、ActiveX数据对象(ADO)和ActiveX控件技术实现了机舱信息显示系统。机舱数据采集系统因其报警显示要求的快速实时性而采用NetDDE技术传到机舱信息显示系统中。整个系统中的数据处理、显示等采用ADO和相应的控件配合实现。各种信息显示制作成ActiveX控件模拟实际的仪表或仪器显示,大大减少了编程工作量。整个系统信息显示直观,使用方便、可靠,符合实际船舶应用需要。     

道路动态透视图研究初探

可视化技术在科学计算和工程设计领域得到迅速的发展。道路可视化技术的应用有助于在道路工程设计方案比较中，对安全、景观、环境作出科学的评价。该项研究在国内刚刚起步。本文介绍了道路动态透视图的研究成果。     

FLICKER INDEX METHOD FOR EVALUATING FLICKER IN COLOR PDPs

Motionartifacts ,thenumberofvisiblegraylevelsandlargeareaflickerarethemainissuesaf fectingimagequalityincolorPDPs[1] .Thehighlyflickeringimagescausemoreseverefatigueofbrainthanofeyes[2 ] .Inordertoreduceflickereffectively ,theframerateand/orhorizontalfrequencyaredoubledtopreventlargeareaflickerinsuchCRTtelevisionsets.However ,itisundesirabletoadoptframerateconversiontechnologyincolorPDPswhenaddressdisplayseparated (ADS)drivingmethodisused[1] .Athigherframerate ,lesstimeisavailableperframe…     

视屏显示终端作业人员职业应激及心身状态

进行了VDT作业人员职业应激及心身状态的调查研究。结果初步显示VDT作业本身独特的职业性质、工作环境和作业需求形成了VDT作业的主要应激源,其作业时间和作业负荷较大者产生了较高的职业性紧张度。VDT作业人员对工作满意程度较差。心理健康水平评价显示该作业人员心理健康水平较对照人员为低,尤其表现在强迫和抑郁两个心理因子方面。心身疾患评价提示VDT作业可能会给作业人员带来一定的心理—生理障碍。本研究尚未发现VDT对作业人员植物神经功能的不良影响。     

船舶主机遥控信息显示系统设计

船舶主机遥控系统是机舱自动化系统的一个重要组成部分.文章设计了一种适合中小船舶的主机遥控信息显示系统,该系统基于嵌入式编程技术,采用STM32系列微控制器,实现主机参数、状态和报警信息的显示,从系统架构设计、电路设计和软件编程等方面对这一系统进行了介绍.     

一种节省PLC输出点的方法在BNWAS中的应用

在开发的基于PLC的船舶驾驶台航行值班报警系统（BNWAS）中,用4位数码管进行参数显示.由于LED数目多,占用PLC输出点数多,成本高.为了降低成本,设计了一种译码输出电路,在PLC输出端与数码管显示器之间增加少量的硬件电子电路,配合软件编程,仅用PLC的7个输出点就可控制4位数码管的27段LED,并且解决了由于各位数码管分时输出所产生的显示不稳定问题..     

Control Concepts for Facilitating Motorway On-ramp Merging Using Intelligent Vehicles

Abstract

Congestion at motorway junctions is a traffic phenomenon that degrades operation of infrastructure and can lead to breakdown of traffic flow and associated reduction in capacity. Advanced communication technologies open new possibilities to prevent or at least delay this phenomenon, and innovative active traffic management systems have been developed in the recent years for better control of motorway traffic. This paper presents a review of control strategies for facilitating motorway on-ramp merging using intelligent vehicles. First, the concepts of the control algorithms are reviewed chronologically divided into three types of intelligent vehicle: completely automated, equipped with cooperative adaptive cruise control and equipped with on-board display. Then, a common structure is identified, and the algorithms are presented based on their characteristics in order to identify similarities, dissimilarities, trends and possible future research directions. Finally, using a similar approach, a review of the methods used to evaluate these control strategies identifies important aspects that should be considered by further research on this topic.