基于OPC技术的分布式监控系统研究

该文在构建了一种基于OPC技术的分布式监控系统体系结构基础上,探讨了OPC服务器和客户端的实现技术,提出了在客户浏览器和内部服务器之间增加一个XML数据发布层———OPCXMLServer的设计思想。OPCXMLServer采用OPC、Java和XML技术编程向浏览器端提供监控画面结构和实时数据,从而实现Internet/Intranet网络异构环境中对各种仪器仪表的远程测量及数据共享。     

基于Web Services的无刷新数据交换研究及应用

将实时数据通过Web的方式发布,实时显示过程参数,已经成为现代工业控制的一项热门课题.通过对XML Web Service技术和Java Script的研究,提出了一种基于B/S结构应用系统的无刷新数据交换的处理方法,可以动态更新页面的局部,而不刷新整个页面,解决了整页刷新的页面抖动效率低下等问题,并介绍了此技术在环保远程实时监控系统中的应用.     

基于Ajax技术Web实时监控系统

针对传统的基于web实时监控系统在实时性方面的不足．利用Ajax技术设计了一种新的工业设备实时监控系统框架。客户端浏览器使用XMLHttpRequest组件与服务端实时交换数据,在网页中采用Ajax技术动态显示设备数据,设置设备参数。系统具有数据交换无刷新、网页无闪烁、数据传输效率高等特点,并解决了多客户端并发访问、权限控制、浏览器缓存、汉字乱码等技术难题。     

Oracle数据库的XML存储技术研究

XML近来已成为Web上数据表示与交换的标准,而由此带来的一个亟需解决的问题就是XML数据在关系数据库中如何存储与管理。以Oracle数据库为例,分析和研究了Oracle的XML数据存储技术XSU和XSQL,XSU借助于一组Java类来实现Oracle数据库的XML数据的存储与生成,而XSQL通过使用XSQL页面模板和动作元素来实现。最后,以网上图书馆的人员数据库为例说明了该技术的应用。     

基于IEEE1451的智能监控系统数据交换技术研究

针对物联网技术应用发展和监控系统数据统一建模的需求,在IEEE1451标准的架构下,设计一种具有传感器即插即用、IPv6数据通信功能的智能监控系统结构,并利用UML建模实现从工业底层传感器、智能监控节点到远程监控应用的网络数据流的动态描述,完成XML通用数据交换接口的设计。将智能监控系统应用于乙醇生产流程工业中,结果表明：基于IEEE1451标准,运用XML数据交换技术,实现了监测数据的准确、高效传输,数据交换时延约0.51ms,可满足应用系统的开放性、跨平台和网络化实时监测应用的要求。     

在Web中数据按需求显示的应用

随着网络应用和企业决策支持系统的需求持续增长,Web数据格式转换的问题成为进一步研究的方向.XML近来已成为Web上数据表示与交换的标准,目前国内外学者己经提出一些基于XML技术的查询语言,XSQL技术就是XML技术扩展了的一种简单易用的查询语言.对XSQL进行了研究和实践,认为XSQL技术的优势为Web技术的发展提供了新的思路.通过使用XSQL技术改进Web的服务功能,解决了数据格式转换的问题,使数据能够按照不同的需求在Web中进行多样式的显示,并以Oracle数据库为例说明了该技术的应用.     

煤矿综合自动化系统中信息实时发布技术的研究

煤矿综合监控系统的信息网络实时发布是安全生产和加强信息管理的重要环节。文章根据煤矿信息的特点,提出了一种煤矿监控信息网络实时发布的设计方法。该方法在信息发布中利用了OPC信息采集、内存实时数据库、XML及FLASH等技术。实验表明:该网络发布信息的动态特性与实际监控系统同步。     

LabVIEW机械故障诊断系统的Web实现

本文针对机械设备远程故障诊断的振动数据分析问题,设计了一种在Web浏览器中进行机械设备振动数据实时显示和频谱分析的方法。首先,LabVIEW程序通过以太网从工业现场采集实时振动数据并以网络共享变量发布;然后,LabVIEW Web Service服务程序根据用户请求获取实时振动波形数据或对数据进行频谱分析,将数据以XML方式返回;最后,客户端的浏览器中分别采用Flex和Ajax对XML进行解析并显示实时波形和特征参数。该方法快速、稳定、可靠,很好地解决了远程故障诊断的问题。     

用XSQL实现Oracle数据库模式到动态XML文档的映射

文中对使用XSQL技术实现数据库模式映射到动态XML文档的机理、特点、技术方案等进行了阐述。     

Web Service在工业过程监控系统中的应用

研究了Web Service,XML,SOAP,WSDL,UDDI等相关网络技术,以及基于XML Web Service服务架构技术在过程监控领域中的应用。由于采用了web Service技术构建实时工业过程监控服务器,实现了监控平台跨越应用系统的对象体系、运行平台、开发语言等界限,以服务的形式封装应用并对外发布,提供用户或其他平台调用,从而形成了基于Web的服务的监控共享平台。以实际例子介绍了Web Service应用的具体方案。     

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.     

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.     

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     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

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。     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。