基于USB的CAN总线数据采集的大容量存储

介绍了在CAN总线数据采集系统中应用U盘作为采集数据的移动存储器的方案.该方案基于USB主/从控制芯片CH375A,在单片机的控制下,实现了CAN总线数据采集系统中嵌入USB主机,从而完成把各节点采集的数据存入U盘,取代了现场数据采集系统必须有一台计算机的模式.     

基于ISP1161的USB HOST技术应用

主要介绍如何利用芯片ISP1161 在嵌入式系统中实现USB　HOST 功能;基于批量传输协议,讲述如何实现数据在 U S B 存储设备上的存储和读写。     

基于CH375的单片机U盘控制器的设计与实现

介绍了一种以USB接口芯片CH375和单片机为核心,U盘为存储介质的数据存储方案,给出了系统硬件实现和单片机读写U盘的应用程序。实验结果表明,该方案具有成本低、通用性强、可靠性高等特点,可方便地集成到各种测控系统中。     

汽车行驶记录仪USB接口的设计与实现

以SL811HST作为USB接口主控制芯片,实现了一种采用标准U盘作为外部存储设备的汽车行驶记录仪设计方案。概括地阐述了USB接口的硬件和软件设计。对于汽车行驶记录仪的数据记录和传输,提供了一个可以参考的使用方案。     

基于SEP3203的嵌入式USB主机系统的设计

该文是以USB HOST技术为核心,基于SEP3203嵌入式微处理器,NUCLEUS PLUS实时操作系统为开发平台,利用主机控制芯片ISP1160来实现USB HOST的功能,支持USB HOST在嵌入式系统与U盘等兼容标准USB存储协议的存储设备间的通信。该文给出了硬件实现及对主机的系统软件体系结构的设计方法。为USB在嵌入式领域的应用提供了成功的应用实例。     

基于单片机的嵌入式USB主机系统的实现

在无操作系统的单片机系统中实现USB主机系统功能.对U盘进行文件的读写.并在U盘上实现FAT格式文件系统.使U盘成为单片机应用系统的存储设备.这极大的方便了单片机在数据采集,存储以及传输方面的应用.最后,实现了脱离PC机的对U盘操作的功能,数据能够脱离PC机在U盘之间方便简洁的交换.     

STC15和CH376的实时海量数据采集系统设计

设计了一种基于STC15单片机的U盘实时海量数据采集系统。该系统利用USB接口芯片CH376对U盘进行读写操作,利用实时时钟芯片DS12887实时采集记录数据的时间,将采集到的海量数据以EXCEL文件形式存储在U盘中。实验结果表明,该方案能够采集、存储海量数据而且还兼顾成本低、通用性强、移动性好等优点,具有一定实用价值。     

基于SEP3203的嵌入式USB主机系统的设计

该文是以USBHOST技术为核心,基于SEP3203嵌入式微处理器,NUCLEUSPLUS实时操作系统为开发平台．利用主机控制芯片ISP1160来实现USBHOST的功能,支持USBHOST在嵌入式系统与U盘等兼容标准USB存储协议的存储设备间的通信。该文给出了硬件实现及对主机的系统软件体系结构的设计方法。为USB在嵌入式领域的应用提供了成功的应用实例。     

在单片机上扩展 USB 接口的设计与实现

本文介绍一种基于SL811HS的单片机读写U盘的系统。系统由单片机、USB接口控制器、高速RAM等设备组成，解决了多数数据采集设备、工控机及嵌入式系统没有安装USB标准接口，不能读写U盘的问题。重点分析系统的原理及传输协议，给出了硬件、软件的实现方法。     

大容量存储测试系统设计与实现

介绍了一种基于AT89S52单片机所构成的大容量存储测试系统的设计。该测试系统采用CH375芯片作为USB主控芯片,使用普通U盘为存储设备用以存储MTX传感器采集到的大量多参数数据,配备相应的软件实现数据的再现,方便与计算机的数据交换,并给出了相应硬件电路以及软件的设计。最后,给出了设计调试结果,证明系统设计方案的可行性。     

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