基于LabVIEW的数据采集的实现

本文在介绍虚拟仪器及其开发环境LabVIEW特点的基础上,分析了LabVIEW中的数据采集技术,并给出了数据采集应用实例。应用表明,LabVIEW用于常规的数据采集、测试、测量等任务,可以减少系统的开发时间,同时也提高了编程效率。     

基于LabVIEW的检测系统数据采集与分析

分析了LabVIEW的数据采集技术,给出了数据采集应用实例。应用表明,LabVIEW用于检测系统的数据采集、测试、测量等任务,可以减少系统的开发时间,同时也提高了编程效率。     

虚拟仪器开发环境LabVIEW及其数据采集

文中在介绍最新技术虚拟仪器及其开发环境LabVIEW特点的基础上,全面分析了LabVIEW中的数据采集技术,并给出了应用实例。     

基于PCI数据采集卡的虚拟采集系统设计

阐述了开放式虚拟仪器平台LabVIEW的特点,介绍了PCI总线技术。利用图形化编程语言LabVIEW的虚拟仪器和动态特性,在计算机上构成用户界面动态显示和交互,使用LabVIEW动态链接库,调用板卡函数开发出了一个由计算机控制的FIFO半满式32路数字量采集系统,并且进行了软件可行性的测试。数据采集卡配合虚拟仪器中的LabVIEW编程,就能完成数据采集过程。实验证明,采用这种方法省去了复杂的语言编程,缩短了软件的开发时间,简化了开发过程,同时也增加了应用的灵活性。     

汽车排放测试系统的数据采集和程序设计

系统以LabVIEW为开发平台,NI-6221 DAQ卡为数据采集硬件,构建了基于虚拟仪器技术的数据采集系统.系统的程序部分采用LabVIEW和VC++两种程序语言相结合的方法,开发了ASM汽车排放测试的软件系统,其中包括数据采集模块、数据库开发模块、串口通讯模块、报表生成模块等.     

基于USB和LabVIEW技术的远程发动机测试诊断系统

现有的数据采集系统中的系列数据采集卡,成本高,插拔不方便,不易扩展,为了解决这个问题,利用USB技术和单片机开发数据采集系统的方法,再结合LabVIEW图形化编程语言作为应用程序开发平台和LabVIEW强大的网络通信和数据分析处理功能,最终实现了发动机测试系统远程检测诊断。     

基于LabVIEW的AC1077数据采集卡的驱动

数据采集是用LabVIEW开发虚拟仪器的关键,但所用的数据采集卡必须有NI公司提供的驱动的程序,因而大大限制了通用数据采集卡的使用。本文介绍了LabVIEW环境下AC1077数据采集卡驱动程序的开发,实验表明,效果良好,满足测试要求。     

基于LabVIEW与PLC的泵组试验台

为了验证泵组工作的可靠性,基于LabVIEW和PLC开发了一套试验台。使用PLC控制系统完成对试验过程的控制和数据采集,利用LabVIEW软件平台实现数据分析和结果判定,同时运用OPC技术完成LabVIEW与PLC之间的数据通信。低成本、高性能、高效便捷地实现了泵组试验台测控系统的开发。     

基于网络的虚拟仪器及其应用

介绍在LabVIEW环境下开发基于网络的远程数据采集系统方法。给出采用DataSocket技术和LabVIEW图形编程语言设计的远程测量系统的实例。     

基于虚拟仪器的远程数据测控系统的研究

虚拟仪器是测试技术和计算机技术相结合的产物,它基于图形化编程开发语言,设计自己的仪器系统,满足不同的应用要求.本文将虚拟仪器应用于测控领域,提出并建立了基于虚拟仪器的远程数据测控系统方案.从应用角度.基于LabVIEW软件和PCI-1711数据采集卡,设计完成了实际应用系统,并通过Datnsocket技术实现对电动机的远程监控和数据采集.     

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