微波干燥煤环境下的模拟信号光纤传输系统设计

在大功率微波环境下,电信号的传输极易受电磁干扰的影响而损失传输精度。针对该问题,设计了一种微波干燥煤环境下的模拟信号光纤传输系统。该系统基于V/F转换,以光纤为传输通道,FPGA为频率测量计,ARM为数据处理控制器,可以有效抑制电磁干扰和提高传输精度。实验结果表明,该系统抗干扰能力强,传输距离远,稳定性高,且电路结构简单,模拟小信号传输误差小于0.1%,为复杂环境中的模拟信号传输提供了一个优良的解决方案。     

光纤工业以太环网在煤矿安全监控系统中的应用

随着煤矿开采规模的不断扩大、对煤矿安全生产要求的不断提高,煤矿安全监控系统传统的数据采集和传输模式在矿井复杂的巷道、大型用电设备电磁干扰等环境下,其数据传输的实时性和稳定性受到制约,不能满足煤矿安全新规程的要求。文章介绍了基于光纤传输介质的工业以太环网应用于煤矿井下安全监控系统的方案,该方案解决了安全监控系统在复杂环境中的传输问题。     

基于光纤工业以太环网的矿井安全监控系统设计

提出基于工业以太环网以光纤为传输介质的矿井安全监控系统的设计方案,设计基于以太环网的煤矿工业控制网络的实用模型,重点介绍系统的总体结构,以及方案的具体实施.该方案解决安全监控系统在煤矿复杂环境下的信息传输问题.     

单总线单片机多机通讯系统设计

提出了用单总线完成单片机通讯的方法。结合系统既传输数字信号又传输模拟信号的特点,提出用消侧音电路解决模拟信号的方案,并给出了详细的技术解决方案。     

基于CC430与LPC1766的远程监测系统的设计

针对复杂的工业现场下无法完成近距离的环境监测,提出了一种基于嵌入式系统与无线通信技术相结合的方案。该方案采用有线网与无线网结合的两级组网,无线采集节点完成数据采集,有线网实现数据的远程传输,完成工业现场气体数据的监测与传输。通过实际组网测试,验证了该方案具有可行性和稳定性。     

基于Windows CE的大功率微波嵌入式控制系统的研究

针对高温微波烧结设备对可靠性、稳定性和多功能的需求,提出了一种基于Windows CE的大功率微波嵌入式控制系统,实现了对高温微波烧结设备可靠、精确的控制。不但丰富了系统功能,提高了控制精度,而且使复杂的操作简单化。     

基于XML、Ajax、Web Service技术的复杂报表生成系统

B/S结构下实现既有复杂格式又有大量计算公式的报表系统一直是个难点.文章在实际项目开发经验基础上,提出了一种能够自定义复杂报表格式和复杂计算公式的报表系统解决方案.该方案利用Cell插件定义报表样式模板,利用XML描述数据,利用Ajax进行数据异步传输,结合Web service技术生成各种复杂的计算公式.该技术方案可以非常好地适应中国式报表格式复杂和公式繁多的特点,实际应用效果很好.     

GPRS在SCADA系统中的应用与实现

针对远程复杂环境下RTU设备与SCADA系统数据中心的通信问题,提出了一种基于GPRS网络的SCADA系统的实现方案。简要介绍了GPRS、SCADA的基本知识,描述了GPRS无线传输应用于SCADA系统的组网方案。     

嵌入式大容量数据采集系统设计

设计了一种基于AT91RM9200微处理器的工业监控现场嵌入式大容量数据采集系统,简化了现场设备层的布线难度,减小了现场设备模拟信号在传输过程中的衰减程度,为后期设备故障诊断和趋势预测提供了更为精确的数据信息。     

利用组合同步码提高信息寄生传输系统的可靠性

本文提出一种信息寄生传输系统中组合同步码的检测方案,用来解决在复杂环境下串行通信的同步问题。利用组合同步码的同步算法,可以提高复杂环境下信号的接收成功率,使信息寄生传输系统的通信可靠性得到大幅提高。     

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.