基于ARM7与LABVIEW的数据采集系统

本文介绍了利用ARM7LPC2290和嵌入式实时操作系（μC／OS-Ⅱ）为核心的嵌入式系统作为下位机进行数据采集．并用RS232进行通讯传输，上位机采用LABVIEW进行数据采集、数据处理、实时曲线显示的方法。最后给出了主要源程序。     

基于ARM的嵌入式家庭网关研究与设计

设计了一种基于ARM7的嵌入式家庭网关系统.系统以微处理器LPC2290作为硬件核心,通过移植源码公开的嵌入式操作系统uClinux,实现家庭网关对智能节点的集中控制和远程控制.本文提出家庭网关的体系结构,阐述了系统的硬件组成,详细分析系统软件设计过程.     

基于CAN总线和以太网的远程监控系统设计

介绍了一种基于飞利浦32位ARM7芯片LPC2290的CAN网络与以太网互联方案,在分析CAN总线和以太网网络模型的基础上,给出了系统硬件和软件设计方案,实现了CAN网络和以太网的互联,构成一个远程监控/数据传输网络.     

基于ARM7和μC／OS—Ⅱ的嵌入式阀门定位器应用设计

介绍了一种基于ARM7的μC／OS-Ⅱ的智能阀门定位器控制系统的基本硬件组成和软件程序设计。系统采用ARM7核的LPC2290作为控制系统的核心,基于μC／OS-Ⅱ实时操作系统编程,用FuzzyP—PID进行控制输出PWM占空比,通过CAN和UART接口实现主控制器、上位机与定位器之间的通信,实现了阀门的准确定位。     

基于ARM的网络控制系统在电网监控中的应用

本文介绍了一种基于us/OS-Ⅱ嵌入式操作系统和LPC2290 ARM处理器的新型智能电力监控系统控制器的设计,对嵌入式系统的硬件设计和软件开发进行了介绍.样机试验表明,该控制器可靠性高,试验结果达到预期的设计要求,具有广阔的应用前景.     

基于ARM的热电厂自动抄表系统的设计

针对传统的热电厂抄表系统存在效率低、可靠性低的问题,设计了一种基于ARM的发电厂自动抄表系统,详细介绍了系统硬件、软件的设计及工作原理。该系统以LPC2368微控制器为核心,通过数据采集器自动读取相应测量仪表的读数,然后通过RFID无线射频识别技术将采集到的数据传送至LPC2368微控制器进行处理,实现了对各单元测量仪表数据的实时监控。     

基于ARM的高速公路动态计重系统的设计

设计了基于ARM微控制器为核心的高速公路动态计重系统;介绍了硬件系统的结构组成和各部分的工作原理及功能,并对以LPC2368为核心的数据采集处理器硬件系统各单元电路的设计进行了详细介绍;基于IAR嵌入式系统开发平台通过C语言程序设计完成了系统的软件设计;测试的结果表明基于ARM的高速公路动态计重系统能够快速、准确地对行驶中车辆进行实时计算称重,存储和显示车辆重量信息,并对高速公路实施计重收费和保障交通运输安全具有广泛的应用价值和社会效益。     

分布式自组织无线数据采集系统的软件设计

研制开发基于ARM的LPC2378微控制器和nRF2401构成的自主无线数据采集子系统;详细叙述无线数据采集系统的工作原理和硬件构成,制作主控端和远端的硬件单元;设计通信协议,开发系统软件,解决联调中的具体问题。     

嵌入式数据采集系统的设计

文章介绍了一种基于ARM微控制器LPC2119和嵌入式实时操作系统μC/OS-Ⅱ的数据采集系统,不仅能够以高速度、可靠、稳定、实时地完成多路模拟量信号以及开关量信号的数据采集,而且能够满足远程和近程数据采集的需要。文中构建了系统的总体设计方案,详细给出了硬件电路设计方法,同时简要说明了移植μC/OS-Ⅱ嵌入式操作系统的关键以及软件设计的要点。     

基于ARM7的SD卡读写控制在数据采集系统中的应用

一个基于ARM7的应用于便携式数据采集系统中的SD卡读写控制设计。描述了基于LPC2132、USB接口芯片D12和SD卡的硬件系统设计,软件设计主要包括D12驱动、SPI总线协议实现和SD卡接口程序设计等。     

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.     

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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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