电动汽车监控平台的设计与开发

本文基于DSP的开发平台,设计了电动汽车电机控制器节点的通信程序.为了有效地监控电动汽车及各子系统,设计了电动汽车CAN总线的应用层协议和监控系统.实验表明,该监控系统能通过CAN总线与其它节点通信,进而实现实时在线数据监控和故障诊断.     

光伏并网电站智能监控系统的设计与实现

针对目前光伏并网电站监控系统自动化程度较低、监控技术较落后的状况,提出了一种新型光伏并网电站智能监控系统设计方案.在深入研究DSP技术、现场总线技术及软件编程技术的基础上,详细阐述了系统的软硬件设计.该系统通过DSP控制内部A/D进行采样,并与装载有监控软件和CAN总线的PC机进行通信,实现光伏电站运行参数的采集、控制和显示,从而实时监测电站的运行状况.试验表明,该系统取得了良好的效果.     

基于CAN总线的光伏设备智能监控系统的研究与设计

针对国内晶体硅太阳能电池生产厂设备自动化程度低、管理分散以及生产效率低下等问题,本文提出一种基于CAN总线的光伏设备智能监控系统,用于对大批光伏设备实行统一管理和实时监控,以实现整线光伏设备的统一管理和自动化运行,提高生产效率和降低生产成本。并分析介绍这一监控系统的特点、系统结构以及系统的设计和实现。     

CAN总线在嵌入式船舶仿真系统中的应用

本文简要介绍了迅速发展的CAN现场总线技术及自研的ARM+DSP嵌入式船舶仿真系统拓展工作,描述了基于CAN总线的上位机与DSP2407及其它节点之间的数据通信以及上位机人机接口界面的制作。课题完成了对系统仿真平台产生的实时数据的接收、发送、分析与存储,通过上位机实现了对系统的监控。     

基于CAN总线的智能双向胎压监测系统设计

利用无线集成传感器SP30和汽车用CAN总线实现胎压监测系统,该系统实现轮胎压力和温度的实时监控,轮胎位置的自动识别,与汽车CAN总线上其它节点的数据交换,监控模块与无线传感模块的双向数据通信控制。本文阐述监测系统总体方案,软件、硬件设计。通过实验室台架试验,该系统能准确监控轮胎的压力和温度,并能利用CAN总线实现数据正确交换。     

基于CAN总线的火灾远程监控系统

根据远程火灾信息数据采集和传输的特点,提出了一种基于CAN总线和嵌入式网关的火灾远程监控系统的总体框架设计方案.该方案使用CAN总线实现火灾远程监控系统数据采集终端的联网和通讯,并且通过嵌入式网关实现CAN总线到以太局域网或Internet的连接,最后,对接入Internet的火灾远程监控信息传输的实时性、可靠性和安全性进行了需求分析.     

从CAN总线到VXI总线数据传输的实现

在VXI总线系统中,为了能够获得大量实时数据,需要利用CAN总线快速可靠地传输数据的性能．设计一种混合VXI总线和CAN总线的系统。在这种混合系统中要实现CAN总线上各个节点采集并传输实时数据．采用VXI—CAN这样一个消息基模块完成数据到VXI总线上的传输。通过这种VXI总线和CAN总线互相通讯获得实时数据的基本原理和方法．实现了实时数据的采集。这种数据传输的实现为VXI总线系统的设计拓宽了新的思路。     

基于嵌入式CAN总线的远程工业监控系统设计

CAN总线是应用最广泛的现场总线之一.设计了远程的工业监控系统,利用嵌入式与CAN总线结合,实现CAN总线与HTTP协议的无缝连接,客户远程实时的监控工业现场.实现了分布式控制系统与具有网络功能的嵌入式系统的有机结合,使工业控制现场的数据和信息实时可靠地传输到远程浏览器,达到工控现场与管理信息系统的有效互动.     

基于CAN总线的智能电动执行器设计

介绍了一种基于CAN总线的智能电动执行器,该控制器以TMS320F2812 DSP为核心处理器.给出了控制器的硬件系统设计、软件设计原则和控制方法.其中带CAN总线接口的DSP微控制器的选用,不仅可以满足复杂数据的计算,而且使得智能执行器可以通过CAN总线保持实时通信.提高了系统的实时性和可靠性.换相控制、智能校准、人机接口以及自校正和多种保护的设计提高了执行器的智能化水平.     

基于CAN总线的实时DSP应用算法

根据控制局域网络（CAN）的特点及应用要求,提出一种新的动态调度协议（DSP）,通过动态选择时间间隙调度信息,同时考虑实时数据的重传机制,并在此基础上介绍基于CAN总线的实时DSP应用算法,该算法不仅能满足CAN网络中实时应用系统的性能要求,还能充分利用CAN网络带宽。实验结果表明,该算法降低了传输请求程序的平均信号延迟,同时提高了网络利用率。     

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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