基于USB接口的数据采集系统相关技术研究

利用USB可以实现较传统方式更有效、更经济、点数更多的多点数据采集。针对基于USB接口和LabVIEW平台的数据采集和数据处理程序设计中,常遇到的典型应用中的问题如:基于TCP的网络传输、软件滤波、数组组合、波形振幅统计、超限报警等问题,本文给出了较详细的解决方案和实用程序设计技巧。     

基于USB的数据采集系统的设计

充分利用高速通用串行总线(USB)所具有的传输速度快、支持热插拔、即插即用易于扩展、占用的系统资源少等优点,将其与传统的数据采集技术相结合,设计实现了一种基于USB的数据采集系统.本文首先对USB2.0总线技术进行了介绍,然后详细介绍了一种基于USB2.0接口技术的数据采集系统,包括数据采集系统设计、固件设计、设备驱动程序设计和主机应用程序设计.本文完成的基于USB总线的数据采集系统,为数据的采集提供了一种更有效、更经济、更方便的数据采集方式.     

采用USBN9602的数据采集系统设计

通用串行总线(USB)作为一种新的微机总线接口规范，具有便捷、易扩展、低成本、低干扰等特点，非常适合作为主机和外设之间的通信接口。本介绍基于USB总线的数据采集设备的开发方法，包括硬件设计、Firmware(固件)设计、基于Windows驱动程序模型(WDM)的设备驱动程序设计以及应用软件的设计，同时还介绍基于USB的远程数据采集系统。     

高速数据采集系统的USB接口设计

针对工程领域对数据采集的多类别数据、高速采集和传输、实时性的要求,设计基于USB接口的高速数据采集系统,并有FPGA+DSP搭配进行采集系统的逻辑控制、接口控制和信号处理,另有一块AD转换板进行模数转换;重点阐述USB接口设计的原理和实现,包括USB固件程序设计、驱动程序设计和USB应用程序设计;经过传输256*256的灰度图像、测试USB通道数据传输速度和使用采集板采集方波信号的测试,证明系统能够实现数据采集的任务,有很快的数据传输速度。     

基于USB总线和89C51单片机的数据采集系统设计

本文介绍了基于USB总线的数据采集设备的开发方法,包括硬件设计、Firmware(固件)设计、基于Windows驱动程序模型(WDM)的设备驱动程序设计以及应用软件的设计,同时也介绍了基于USB的远程数据采集系统.     

EZ-USB及其在图像采集中的应用

介绍了通用串行总线(USB)的主要功能，硬件结构及在数据采集方面的应用。通过对Cypress公司开发的EZ—USB芯片的分析与研究，证明USB2．0系统具有高达480Mbps的传输速率、较传统方式更有效，更方便，更经济的数据采集以及在应用中的可行性。     

基于LabVIEW的数据采集与处理软件编程技巧

针对基于Lab VIEW平台的数据采集和数据处理程序设计中，常遇到的典型应用中的问题如：基于TCP的网络传输、软件滤波、数组组合、波形振幅统计、超限报警等问题．本文给出了较详细的解决方案和实用程序设计技巧。     

基于USB的航空检测数据采集系统的设计

通用串行总线 (USB)作为一种崭新的微机总线接口规范 ,可以实现较传统方式更有效、更经济、更多点的数据采集。详细介绍了基于USB总线的航空检测数据采集系统的开发方法。     

USB总线数据采集设备的设计

介绍了基于USB总线的数据采集设备的开发方法。包括硬件设计、firmware(固件)、基于WINDOWS驱动程序模型(WDM)的设备驱动程序设计以及应用软件的设计。     

USB2.0总线的数据采集设备的设计

介绍了基于USB2.0总线的数据采集设备的开发方法。其中包括接口硬件设计、firmware（固件）设计、基于WINDOWS驱动程序模型（WDM）的设备驱动程序设计以及应用软件的设计。     

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