基于Linux的嵌入式实时数据库的设计

实时数据库是嵌入式系统的核心,用来定义数据变量,负责与外部设备进行实时数据交换。在用组态软件开发嵌入式应用时,在开发环境中定义实时数据库结构、数据来源及类型,在嵌入式运行环境获取实时数据库的数据,并进行显示、报警、存盘等操作。着重介绍了基于Linux的嵌入式组态软件中实时数据库的设计及其实现。     

基于组态实时数据库的焊缝参数数据管理系统

结合SQL Server数据库,以焊缝参数数据的实时监控与管理系统为例,叙述组态软件中数据库技术的应用。通过易控组态软件的数据库访问,采用简单的函数调用,实现实时焊接数据与历史数据库之间的数据交互功能,将生产过程数据进行管理和图形化显示。     

基于ARM平台的嵌入式实时数据库的设计与实现

根据对嵌入式实时数据库的分析,设计出基于专用文件系统的嵌入式实时数据库,该文件系统以块为单位进行存储,使用点、时间、数值来表示一条具有完整意义的数据,根据数据特点,建立了针对实时数据存储的文件系统索引结构,最后完成了专用文件系统在嵌入式Linux上的运行,它提供专用的调用接口进行读写。     

嵌入式实时数据库管理系统的设计*

在嵌入式实时环境中,传统的数据库已经不能满足人们对数据处理实时的需求;而一般的嵌入式实时数据库由于受资源的限制只能偏向于某个应用,不能满足嵌入式环境复杂多变的情况。因此,介绍了一个基于QNX操作系统设计出来的基于组件的嵌入式实时数据库管理系统,讨论了该数据库如何实现事务的实时处理策略,描述了该系统的开发过程和现有的功能属性。     

EMDB技术在基于WLAN的餐饮管理系统中的研究与应用

移动数据库技术是支持移动计算环境的分布式数据库技术，在移动计算环境中有许多重要应用。对嵌入式移动数据库的几种关键技术——数据广播技术，复制缓存技术、移动事务处理技术分别进行了分析，通过嵌入式移动数据库在基于无线局域网的餐饮管理系统中的应用实例探讨了移动数据库的应用前景。     

WinCC自定义数据库的数据查询和报表生成

基于西门子组态软件WinCC,建立与在SQL Server中自定义数据库的连接,将实时数据存放在新建的数据库中。通过编写VB脚本进行相关的数据查询。借用MSFlexGrid控件,向控件写入数据组态报表画面,连接Excel模板,把数据导入模板生成Excel报表。该方法在实际工程中得到了很好的应用,可以灵活方便地处理WinCC中数据查询和报表生成的问题。     

基于嵌入式数据库技术的光电导引车系统设计

分析了光电导引车系统中对大量实时数据采集、存储和处理的实际需求,提出基于嵌入式数据库技术实现导引控制的架构方案,对嵌入式数据库的设计与实现方法进行了探讨,实现了嵌入式数据库SqLite在嵌入式Linux和S3C2410A微处理器环境的移植,完成了光电导引车的导引控制。     

组态软件实时数据库系统研究

实时数据库是组态软件的核心,实时数据库能够及时准确地获取现场数据是整个工业控制系统正常工作的基本前提。本文主要介绍监控组态软件的实时数据库系统的设计与实现。     

组态化嵌入式软件仿真系统设计

为缩短开发周期,提高嵌入式软件仿真系统的设计水平,提出一种组态化嵌入式系统设计。集成仿真建模工具、仿真模型代码生成工具,实现仿真运行环境搭建和对仿真数据的实时监控,采用组态化的仿真方法,根据用户需求生成监控界面。实验结果表明,该系统的运行平台快速高效,监控环境良好。     

基于J2EE的组态软件实时数据库研究

本文介绍了基于面向对象技术的组态软件实时数据库系统的设计思想，针对实时数据库的特点，提出了一种在J2EE环境下，利用设计模式缓存数据提高访问效率的方法，给出了实时数据库和其他应用的接口实现方式和通信方法，利用该方法建立的实时数据库具有全面的开放性、可维护性和可扩充性。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

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.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.