基于ARM嵌入式系统和GPRS无线通讯技术的新型汽车故障诊断仪的实现

近年来,嵌入式技术和各种无线通讯技术快速发展,并得到了广泛应用。本文对基于ARM的嵌入式技术与GPRS的无线通讯技术的新型汽车故障诊断仪设计与实现进行了研究。本文在研究中实现了新型汽车故障诊断仪软、硬件设计,选用ARM9系列芯片,GPRS无线模块MC35,并对利用GPRS的无线通讯技术的新型汽车故障诊断仪的实现进行了研究。     

GPS与GPRS在车辆行驶记录仪中的应用研究

本文综合嵌入式技术、GPRS无线通讯技术、GPS定位技术,采用32位处理器S3C2410,实现汽车行驶轨迹的记录。采用了GARMIN公司的GPS15作为接收信息的定位模块,并通过西门子的GPRS模块MC35i,完成了车辆行驶记录仪的双向通信。     

基于GPRS的智能电表的设计

随着国民经济的快速发展,各种工业民用的电能表得到了日益广泛的应用,在地域上的分布也越来越分散。当前GPRS无线通讯技术的发展相当迅速,而新型的电能表的自动抄表也是一个研究的主要方向,将日渐成熟的GPRS无线通讯模块加入到多功能电子式电能表当中,实现对数据的无线传输,无线自动抄表将会有很大的应用前景。本文提出一种基于GPRS的智能电表的设计,并详细阐述该智能电表实现原理。     

基于GPRS的机车状态监测与管理系统

应用无线通讯技术GPRS和互联网INTERNET为基础,设计出机车状态监测与管理系统。机车现场采集到的数据经过处理后,初步诊断有无故障并做出相应报警提示。通过GPRS将数据传输到机务段,保存到数据库中,并通过专家系统或人工分析得出的诊断结果和处理对策,并将它们发送回机车。文中简单介绍了整个系统的硬件组成,数据采集和GPRS无线通讯。提出了GPRS数据传输过程中数据完整性和安全性问题,并做出了解答。还详细介绍了机务段管理系统软件功能和具体实现方法。     

基于GPRS的高压接地极在线监测通信设计

接地极入地电流的大小直接关系到直流输电线路的可靠性。在研究接地极特点的基础上,设计了以三星ARM1为研发平台、基于GPRS无线通讯的高压接地极在线监测系统。系统以S3C2410为核心,通过GPRS无线通讯模块实现端到端的数据传输功能。描述了系统的硬件构成、终端软件流程、GPRS模块的控制及监控中心的软件设计思想。系统能实时监测接地极的各项参数,提高了电力系统的可靠性,具有很好的应用价值。     

生物安全洁净室压差实时监测系统设计

基于GSM/GPRS无线通讯技术设计了生物安全洁净室压差实时监测系统,该系统使用了ATmega128单片机作为通讯装置主控芯片,结合RS485串行总线技术、GSM/GPRS无线通讯技术和Fame View软件编程技术实现了洁净室压差实时监测。着重对系统抗干扰能力和通讯可靠性进行了加强,在洁净室压差不符合规定时监测系统能通过发短信的方式提醒相关洁净室人员做好及时防护。研发的装置及系统已在现场试运行,证明了该监控系统实现的有效性和可行性。     

基于GPRS技术的生态环境监测系统设计

针对环境监测中远程采集数据的实时传输和对监测数据进行管理分析的问题,研究了无线通讯GPRS的通讯原理.系统通过GPRS技术实现了远程监控数据的无线实时传输,采用基于ARM的S3C44BOX芯片为核心设计的监测仪的硬件电路,在μClinux环境下进行了监测仪应用程序的开发,通过MC35i模块实现了监测仪的GPRS网络连接和与监控中心计算机的数据通信,为全局性的城市环境监测工作提供了良好的平台.     

GPRS在户外智能真空断路器上的应用研究

介绍了GPRS无线通讯技术,对GPRS无线通信技术应用于户外真空断路器的可行性进行了分析,并设计了相应的监控系统;系统下位机采用DSP芯片作为中央处理单元,对监测数据进行实时采集并发送给远程监控中心,分合闸操作按照GPRS无线传输特定指令给下位机,下位机接收指令,处理器响应并发送回馈代码,实现断路器的实时监控;传输的数据通过数据库SQL Server2005实现存储并且在特定文件夹中以文本文件保存通讯的所有记录,方便历史查询;上位机提供了友好、简便、可视化的操作界面;通过实验室测试,实现了GPRS应用于真空断路器的远程操作,提高了控制的智能化、精准化.     

基于GPRS的灌区明渠测流系统研究与设计

本文基于GPRS无线通讯网络技术,提出了一种采用超声波明渠流量计、流速传感器、液位传感器等原件构成的灌区明渠流量测量系统方案。本系统可以及时的将传感器采集的数据,通过GPRS模块无线传输给监控中心的上位机进行分析处理。系统以较低的建设成本实现灌区测流管理的自动化和信息化,且实时性、可靠性高。     

基于移动网络及短距离通讯技术的电表数据采集系统

介绍了电表数据采集系统,它通过工业现场远程抄表集中器,将短距离无线通讯技术和GPRS无线网络通讯技术结合在一起,成功的运用到电力数据远程抄表上,实现了电力数据的实时采集与传输,最后对系统后台软件的设计进行了介绍。     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

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.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

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