嵌入式数据采集系统设计

介绍了一个基于ARM和Linux平台,使用Web服务器BOA和嵌入式数据库SQLite进行数据采集管理的远程数据采集系统。重点讨论了系统硬件平台的电路设计和软件平台的应用程序模块,提出了通过CGI程序对嵌入式数据库SQLite进行数据存取的方法。实验表明,系统采用sQLite进行数据管理,克服了传统数据采集系统存在的实时性差、存储效率低的缺点,可以在复杂环境下实时采集和高效存储远程数据。     

数据库SQLite在嵌入式系统中的应用

在嵌入式系统应用的开发设计中,用数据库SQlite对系统的批量数据进行维护管理,可以大大提高程序的运行效率,并让源程序具有更好的可读性和可维护性。文中介绍在嵌入式系统开发中应用嵌入式数据库SQLite的具体方法,包括介绍开源免费的嵌入式数据库SQLite,给出SQLite在ARM-Linux平台上的交叉编译过程,并通过一个应用实例分析说明SQLite在嵌入式系统中开发应用的步骤方法。     

数据库SQLite在医用血液分析仪嵌入式管理系统中的应用

为实现对医用血液分析仪测试数据和系统设置数据的有效管理,在分析仪嵌入式管理系统中引入了嵌入式数据库SQLite。设计了数据库的功能和结构,合理创建了应用表格,设计了系统与数据库间的API函数,并将数据库文件集成到管理机系统当中。SQLite在血液分析仪管理系统中的应用满足了仪器测试数据管理以及质量控制功能的要求。     

嵌入式系统中数据库信息管理技术的应用研究

随着嵌入式技术、嵌入式开放化应用系统的快速发展,嵌入式数据库也开始在嵌入式硬件或移动设备上运行,这也是嵌入式数据库与MySQL通用数据库的不同之处。通过围绕SQLite嵌入式关系数据库,进行嵌入式数据库管理系统关键技术,以及数据库信息管理技术特性的分析,并提出了数据库框架结构模块组成、数据处理代码生成、页面调用程序等的建构方案,以完成对嵌入式系统数据库内的数据信息搜集、查询、调用与存储。     

嵌入式数据库SQLite的远程可视化维护管理工具的设计与实现

在嵌入式开发或应用环境中,目前对嵌入式数据库SQLite的维护管理都是通过本地调用API实现,没有远程可视化的嵌入式数据库维护管理工具。提出一种基于网络的B/S架构实现对嵌入式数据库SQLite的可视化管理方案。该方案使得浏览器能够以图形界面方式远程访问嵌入式数据库SQLite,有效拓展了SQLite的维护管理方式。     

嵌入式仓库远程监控系统的设计与实现

针对远程监控与故障诊断过程中的高信息吞吐量、多用户数据共享问题,采用SQLite嵌入式数据库进行数据的统一管理,将嵌入式技术与Web Services技术相结合,构建一个仓库远程监控系统,本文提出的技术方案符合当前嵌入式技术的发展趋势,为Web Services技术在控制领域的应用奠定了基础。     

嵌入式数据库在振动监测系统中的应用

随着嵌入式系统的发展,嵌入式数据库在信息采集与监控系统中得到了日益广泛的应用.该文在对嵌入式数据库技术进行分析的基础上介绍了基于嵌入式数据库技术的汽轮机振动监测系统的设计与开发.整个振动监测系统以ARA处理器LPC2292为硬件平台,以μCLinux嵌入式操作系统,以SQLite为数据库管理系统,对系统的设计方案及软硬件配置、SQLite的移植及嵌入式数据库的访问与操作进行了详细分析.所设计的振动监测系统得到了成功应用,具有较高的数据存储、管理与使用效率.     

SQLite数据库在嵌入式中间件系统中的应用

介绍了基于ARM的嵌入式射频识别中间件系统中,如何使用SQLite数据库为中间件系统存储数据,从而可以方便及时地对数据进行平滑和过滤,客户端也可以方便地对数据进行查询。结合嵌入式系统开发中对数据库的需求简单地介绍了SQLite的特点,结合表单并利用SQILite提供的C语言API,成功地实现了客户与SQLite嵌入式数据库系统的动态交互。最后结合具体应用简单介绍了数据库的优化设计。     

嵌入式Linux系统SQLite数据库加密功能的移植和应用开发

SQLite作为一个开源的嵌入式数据库,系统开销小,在嵌入式系统的开发设计中,用数据库SQLite对系统的批量数据进行维护管理,可以大大提高程序的运行效率。但开源版本的SQLite本身没有安全机制的支持,在当前数据安全的意识和要求越来越高的背景下,为嵌入式系统中SQLite移植增加加密功能后,安全性得以提高。     

嵌入式数据库SQLite在雷达信号处理系统中的应用①

嵌入式系统和嵌入式数据库技术的不断发展完善,使其在雷达信号处理设备中的应用日益广泛。对嵌入式数据库SQLite的内部结构、主要接口函数和技术特点给予简单的介绍,以Blackfin533和μClinux为开发平台,介绍了嵌入式数据库SQLite在雷达信号处理系统中的具体应用。     

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