基于ARM心电血压监测仪的USB接口设计

介绍了一种应用于家用心电血压监测仪与计算机进行高速数据传输的接口方案,采用ARM内核控制器与USB专用控制芯片,实现了心电、血压数据的快速无失真传输,重点阐述了S3C44B0X与USB控制芯片USBN9603的硬件连接和USB固件设计,以及上位机WDM驱动程序的开发思路和方法。     

USB OTG设备互联方案的设计与实现

针对实现嵌入式USB主机互联的需求，提出了以PDIUSBD 12为USB控制芯片的USB On—The—Go（USB OTG）设备解决方案。通过分析芯片驱动、控制单元数据交换程序设计，建立PC—PC USB接口连接器，为USB主机间提供对等功能的USB设备接口，通过统一的数据缓冲区，实现了两台USB主机不借助于USB集线器的互联方案。     

ARM系统设计及其USB主机扩展方案

本文介绍了以ARM为核G微处理器的嵌入式系统的设计方法，以及USB主机控制芯片在ARM系统中的扩展方案．在此硬件平台的基础上，对ucLinux操作系统的移植和应用进行说明，并探讨了USB主机控制芯片驱动程序的设计。     

基于USB接口485总线设备检测系统设计

本文介绍USB接口的485设备通信板卡和485设备检测软件的设计过程。板卡设计采用Cypress公司68013USB接口控制芯片,利用控制芯片的IO端口,通过FPGA芯片实现与485总线设备的通信。同时开发USB设备异步驱动,采用VC 开发环境,设计了485设备检测系统。     

基于USB接口的数据采集和控制卡设计

文章介绍了基于USB接口芯片的数据采集和控制卡的设计．整个系统主要由六个部分组成：USB接口芯片、本地端控制器、A，D、D，A、计数器以及DIO口，通过主机应用软件来控制USB口的读写、数据采集、D，A控制以及数据传输。文中详细介绍了USB接口芯片CH371的工作原理及应用、数据采集器件ADS7825的工作原理及应用和DAC器件LTC1450的应用等．并利用MFC进行主机应用软件的设计。     

嵌入式ARM系统的USB主机接口的设计与实现

本文介绍了ARM系统中USB主机接口的设计与实现方法。以USB主控芯片ISP1160为例,对uC／OS-Ⅱ操作系统的移植和应用进行说明,探讨了USB主机控制芯片驱动程序的设计,给出了具体的硬件结构和固件编程设计。     

智能仪表的USB接口设计

分析了USB接口的特点，提出了在智能仪器仪表接口设计中使用USB接口的一种方案。介绍了使用8位或16位单片机设计智能仪器仪表的USB接口的方法和过程，包括接口控制芯片的选择、固件程序的开发、计算机USB驱动程序和应用程序设计等几个方面，并以CH372芯片为例给出了设计过程。应用结果表明该方案在智能仪表USB接口设计中具有实现简单、传输速度快、成本低等优点。     

基于FPGA与USB2．0的实时数据采集与处理系统

介绍了一种基于FPGA与USB2．0的双通道实时数据采集与处理系统。该系统采用XC3S1200E芯片作为核心处理芯片,CY7C68013作为USB接口芯片,通过FPGA内部的控制模块控制A／D数据转换和USB的数据传输,并在FPGA内部完成数据的处理。实验证明,该系统基本能满足设计的要求。计算出所求粒子的直径。     

基于嵌入式系统的USB(HID))设备设计

由于目前USB设备多是由专门的USB控制芯片来实现其应用控制,芯片内集成了USB协议,成本较高,PCB板的面积较大.对于成本敏感的应用有很大限制.本文提出了仅用一片MCU(微处器-单片机)或嵌入式系统芯片来实现其与PC机通讯的方法.该方法使用微控制器仿真USB设备,极大地方便了用户的开发,同时降低了功耗、成本.     

NEC芯片USB 2.0接口卡打假

市面上的USB 2.0USB2.0芯片有三家厂商,分别为NEC、VIA、ALi,其中USB2.0接口卡使用NEC与VIA的控制芯片较为常见。NEC是最早跨足USB 2.0芯片的厂商,它的控制芯片整合性、兼容性、稳定性也最好,例如Windows XP SP1就已经内建NEC芯片的驱动程序,而VIA与ALi芯片就需安装原厂的驱动程序后,才能够使用。就是因为基于NEC芯片的USB 2.0接口卡的兼容性和[(\316\310\266\250\320\324\272\303\243\254)0(\313\371\322\324\272\334)]多电脑玩家也指名要基于NEC芯片的产品(见图1)。市场上有些假冒的USB2.0接口卡实际上采用的是价格…     

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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