基于GPS/GPRS的车载监控终端系统

为提高城市车辆管理水平,利用GPS,GPRS和C8051F系列单片机构建车载监控终端系统.根据车辆状态信息采集情况设计控制器模块、GPS接收模块、GPRS无线通信模块;采用C语言对车载监控终端进行软件开发,其功能包括信令和GPS数据的接收、处理与传输,GPRS模块的数据传输与通信,I/O口信号采集与控制.该系统可应用于智能交通、物流管理及特种车辆监控调度等方面.     

GPS车辆监控系统中串行总线接口设计与实现

通过在车载模块中实现GPS接收模块和GPRS通讯模块,在控制中心接收模块中实现GPRS通讯模块与USB模块的接口通讯,可有效地实现控制中心、车载终端和GPRS无线网络的通讯,达到及时监控和管理车辆的目的。本文详细介绍了GPS车辆监控系统中串行总线USB接口的设计和实现,为GPS民用化打下了基础,具有广阔的市场前景。     

基于嵌入式Linux的车载终端的设计与实现

针对城市交通管理中车辆管理和调度困难的问题,提出了一种基于嵌入式Linux车辆监控管理系统的车载终端方案.方案采用ARM核心处理器、嵌入式Linux操作系统,并且利用GPRS无线数据传输技术及GPS卫星定位技术,实现了GPS定位信息的接收、处理及其GPRS网络数据传输等多种功能.文章重点介绍了车辆监控管理系统的工作原理及车载终端的硬件设计和软件实现.本方案终端具有安装简单、功能强大、极具实用性等特点.样机测试表明,本方案终端可以满足车辆监控管理系统的要求.     

基于GPS/DR组合的新型车辆导航仪

为了实现车辆的动态监控，介绍一种基于GPS(Global Positioning System)和DR(Dead Reckoning System)组合的新型车辆导航仪。系统采用C8051F005单片机作为控制单元组合GPS和DR信号对车辆进行连续定位，并把位置信息传输给监控中心；监控中心以车辆当前位置为中心截取地图并传输给车载终端，车载终端利用彩色液晶显示屏LCM(LCD Module)显示地图，并通过GPRS通信模块实时刷新地图。利用该导航仪进行跑车实验，结果表明该装置有较高的精度和良好的实时性。该导航仪适用于公交车、出租车等车辆的监控系统。     

北斗通信与导航一体化车载智能网络终端的开发

为了实现对各类车辆的有效调度、协调控制和管理,提高物流运输的效率和安全性,针对物流系统应用环境,基于STM32微控制器设计开发了一种北斗导航与通信一体化的智能车载网络终端。该终端以STM32F103ZET6微控制器为核心,由北斗定位模块UM220、GPRS模块SIM900A和ZigBee无线网络模块组成。其中,UM220模块负责接收北斗卫星信号定位;SIM900A模块与物流中心通信;无线ZigBee模块用于传输车载物流相关信息。实验表明,该终端能自动完成车载网络数据的采集、处理和传输等功能,满足物流环境下的应用需求。     

基于 GPS／GPRS的船舶厂区车载终端的设计与实现*

针对船舶企业车辆安全管理信息化的具体需求,论文研究和设计了一种通用的车载终端模块。该模块利用目前主流的物联网芯片作为MCU ,搭载GPS和GPRS模块,并采用C语言进行软件开发。实现了包括GPS数据接收与处理,GPRS数据传输与通信,IO信号采集与控制,AD信号采集,PWM 信号控制,远程管理与控制。该模块可用广泛应用于船舶厂区车辆监控,生产调度,物流管理等场合中。     

工程车辆车载GPS定位终端的设计研究

结合GPS/GPRS技术在定位和无线通信方面的优点,该文设计了一种应用于工程车辆的车载GPS定位终端。介绍了系统的组成和功能,着重阐述了系统的软硬件设计。终端采用了嵌入式微控制器LPC2138,GPS以及GPRS无线通信模块,具有稳定、可靠、低功耗,低成本的特点。终端实现了车辆信息的采集和精确的定位功能,达到了设计要求。     

基于GPS和GPRS车载导航定位系统的实现

车载终端通过GPS外接天线接收GPS信号,由串口将此信息传送给主机,主机解算出车载当前的经度、纬度、速度、时间、状态等信息,一方面为电子地图提供地理位置信息,将车载的位置在终端实时显示出来;另一方面将信息打包通过GPRS发送给监控中心,提供监控所需的原始数据。文中介绍了车载终端的组成,重点阐述了车载的定位及显示技术。     

基于GPS和GPRS车载导航定位系统的实现

车载终端通过GPS外接天线接收GPS信号，由串口将此信息传送给主机，主机解算出车载当前的经度、纬度、建度、时间、状态等信息，一方面为电子地图提供地理位置信息，将车载的位置在终端实时显示出来：另一方面将信息打包通过GPRS发送给监控中心，提供监控所需的原始数据。文中介绍了车载终端的组成，重点阐述了车载的定位及显示技术。     

基于SOPC的GPS信息加密传输系统

设计了一个GPS信息加密传输系统,用于车辆、人员等重要移动目标的远程监控。该系统主要由一台中心计算机和一组终端模块组成,前者负责定位信息的接收、处理、显示以及密钥分发等系统管理任务,后者安装在被监控的移动目标上,负责定位及其它监控信息的加密传输,中心计算机与终端模块之间采用CDMA进行无线通信。终端模块利用商用GPS接收模块实现定位信息采集,采用基于Alera FPGA的SOPC技术,实现了整个终端模块的控制和数据加解密。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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