基于PowerBuilder环境管理信息系统通用主控程序的设计

利用PowerBuilder可以开发各种实用的管理信息系统,用户初次使用系统时,通常是由系统设计者提供系统管理员的编码及口令,进入身份验证模块,系统确认合法后,进入主控程序,主控程序显示本管理系统的功能菜单。本文详细介绍一种适合各种管理信息系统的通用主控程序的设计方法。     

基于DSP平台的嵌入式电力参数测量系统的设计

设计实现了一种新型的基于双处理器、主控软件运行WinCE5.0操作系统的高准确度电力参数测量系统,该系统分为两个模块：数据采集模块和系统主控模块。数据采集模块使用TI公司的数字信号处理芯片TMS320VC5409和ADI公司的16位高速模数转换芯片作为其核心,完成采集和处理数据,并把处理后的结果数据传送到系统主控模块;主控模块使用三星公司的具有ARM9核的S3C2440A作为其核心,采用WinCE5.0作为主控模块的操作系统,并实现具有对数据采集模块的操作控制、数据显示和管理测量数据的功能。经试验证明文章设计的参数测量系统已达到预期精度。     

一种风机主控的前置系统设计

风机主控系统是风力发电机组的核心控制系统,不仅承担着风机的核心控制、保护功能,还承担着对外数据提供、故障数据记录、运行数据录波、关键信息统计等辅助功能。为了降低PLC的CPU占用率、减少PLC的内存、存储的占用,提出一种风机主控的前置系统设计,将主控系统的辅助功能前置到工控机,让主控系统专注于机组的控制与保护,保障主控系统的稳定可靠和实时性。     

单片微型计算机远距离数据采集系统设计

设计和实现了一个远距离信息采集系统.利用SI4463无线串口模块将远端传感器采集到的数据信息送入主控微型计算机单元,主控微型计算机单元对采集到的数据信息进行分析处理,以便实现各种预警和控制功能.     

主控系统在广州地铁三号线的设计与实现

广州地铁三号线主控系统是国内地铁行业首个大型综合自动化系统，文章从系统架构、接口设计及软件架构等方面阐述了广州地铁三号线主控系统的设计思路和实现方式，并对未来主控的发展方向进行了思考。     

基于SOPC的高速边界扫描主控器设计

依据IEEE1149.1标准,采用SOPC技术设计了一款高速的边界扫描主控器;用户可对该主控器进行配置,输出测试所需的控制信号,输出的测试时钟TCK频率可达50MHz,大大提高了边界扫描测试效率;同时,开发的具有自主知识产权的边界扫描主控器IP核为SOPC系统可测性设计提供了一个很有实际价值的组件,无需专用边界扫描测试设备即可实现对系统的边界扫描测试功能;经时序仿真波形和数字示波器观测结果验证,该边界扫描主控器所产生的测试信号符合测试要求,设计正确合理。     

基于USB总线的边界扫描测试主控系统的设计

分析了边界扫描测试技术的工作机制对测试主控系统的功能需求。提出了一种基于USB总线的低成本边界扫描测试主控系统的硬件设计方案；该系统以便携式计算机为平台，用FPGA实现JTAG主控器生成满足IEEE1149．1协议的边界扫描测试信号，并用普通的SRAM实现存储器共享；该系统可以对系统级、PCB级和芯片级集成电路进行边界扫描测试以及进行边界扫描测试的研究和实验；通过试验，系统性能满足设计要求。     

基于GSM的嵌入式安防系统设计

设计了一种基于全球移动通信系统（GSM）的嵌入式安防系统。该系统采用NXP公司ARM7架构的LPC2103作为主控芯片,以C8051F330为辅助控制器,实现了智能防盗和温度异常的报警功能。报警形式为声光报警和短信报警,取消报警可以手动或发送短消息。系统的显示界面友好,能够实时显示温度和昼夜情况。传感器与主控芯片之间实现了数据的无线传输。     

机器人施釉系统主控软件

文章介绍了机器人施釉主控软件系统的设计与实现。主控软件系统采用了多线程,闭环反馈控制,视觉伺服,三维仿真监控等技术,实现了对机器人施釉系统的控制。测试表明,所设计的主控软件系统满足设计要求。     

列车车载嵌入式监控系统的设计与实现

通过分析车载监控系统的功能,设计了系统的结构,以Hi3512为主控芯片,以嵌入式LinUX为操作系统,完成了车载嵌入式监控系统的硬件和软件设计.经一年多的实际运行测试,该系统稳定可靠,各项指标均已经达到设计要求.     

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.     

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.     

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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