基于FDT与OPCUA的设备集成研究

本文介绍了FDT技术以及它在现场设备集成中的应用,然后通过研究分析,指出了FDT集成平台过于依赖微软操作系统、与企业上层网络的不完全兼容性,以及现行OPC服务器安全可靠性存在不足.为此,本文通过引入OPC UA技术,建立一个基于FDT、OPC UA的设备集成模型解决了上述问题.     

基于FDT与OPC XML的工业控制系统集成研究

首先通过介绍FDT(现场设备工具)技术及其在工业控制系统集成中的应用,对现场智能设备进行综合的配置、管理和诊断,发现由于其集成平台过于依赖微软操作系统,缺乏兼容性和可移植性;文章引入OPC XML技术,增强了工业控制系统集成平台的可移植性和兼容性,从而避免工厂"信息孤岛"问题的出现;最终通过搭建基于OPC XML和FDT技术的系统集成模型,成功解决了智能化设备的无缝集成,对于工业控制系统集成具有蘑要的指导意义.     

板坯跟踪系统中的OPC接口研究及应用

OPC技术是实现控制系统现场设备级与过程管理级进行信息交互的关键技术,是实现不同的现场总线协议之间互操作的重要手段.通过在板坯跟踪系统中应用了OPC技术,介绍了OPC数据访问规则,以及OPC接口的相关概念、接口标准,实现了通过OPC接口连接不同的现场总线,完成了现场设备级与过程管理级网络的信息交换.给出了OPC服务器、客户端的相关设置,客户端开发的基本步骤,并讨论了OPC技术应用于工业现场领域所产生的效益以及其发展前景.     

基于FDT的OPC跨平台数据访问研究

在解决分散控制系统(DCS)中多平台的数据访问和集成问题时,必须为每个不同的平台开发一个相应的数据访问接口和服务器。在研究FDT技术的基础上,提出一个基于FDT技术的OPC跨平台数据访问模型,利用该模型解决了在DCS系统下数据访问依赖于设备的现场总线类型、厂商和设备特点的问题。     

OPC在煤矿生产中的应用研究

针对煤矿生产中多种现场总线间的"信息孤岛"问题,提出了基于OPC技术的解决方案:(1)基于VB的OPC客户端访问MCGS的设计,该方案以MCGS作为OPC服务器,负责与现场设备的信息交换,同时为远程的OPC客户端(简易监控软件)提供底层的实时数据信息;(2)基于OPC技术的多现场总线集成的设计,通过OPC标准接口,1个OPC服务器(MCGS)可以与多个远程的OPC客户端通信,减少了MCGS组态软件的使用,节省了成本。     

基于FDT技术的多总线集成研究与应用

针对现场总线系统中现场设备集成与系统集成问题,研究了FDT (field device tool)技术特点.在此基础上,将FDT技术应用到NCS4000系统中,以满足设备综合管理的需要,并提出了系统软件框架模型和系统集成模型.详细说明了网关DTM (device type manager)的实现方法,分析了DTM程序与现场设备的交互过程.通过开发DTM并将其集成到系统中,验证了设计的可行性.     

短讯

五大自动化基金会巨头FDT集团、现场总线基金会、HART通信基金会、PROFIBUS和PROFINET国际组织以及OPC基金会联合开发了一个统一的现场设备集成(FDI)解决方案。新公司命名为FDI Cooperation,LLC(基于美国法律的有限责任公司)。2011年9月21日,深圳市英威腾电气股份有限公司第一家海外子公司——印度子公司开业仪式在孟买举行。中国驻孟买总领事牛清报、中国工商银行孟买分行总经理孙翔、英威腾董事长兼总经理黄申力和英威腾海外事业部总经理萧非联袂出席了庆典仪式并致辞。     

OPC技术在基于PROFIBUS控制系统中的应用研究

OPC技术是实现控制系统现场设备级与过程管理级进行信息交互的关键技术,是实现不同现场总线协议之间互操作的重要手段.介绍了OPC技术的产生及主要特点,提出了一种基于OPC的PROFIBUS现场总线釜式反应器温度控制系统,介绍了OPC客户程序的开发方法,并讨论了OPC技术应用于工业控制领域所产生的效益以及其发展前景.     

智能化系统集成的开放工业标准-OPC DX技术

1 引言 OPC(OLE for Process control)基金会与其它现场总线国际组织合作,在2002年汉诺威工业博览会上展示了第一个基于OPC DX(Data eXchange)的演示系统,该系统演示了在利用OPC DX技术在以太网中实现EtherNet/IP、PROFInet、高速以太网(HSE)和INTERBUS四种总线系统之间协同工作的能力,也充分展示了自动化设备生产厂商和用户利用OPC DX通过以太网建立不同总线的无缝连接并进行现场和综合数据交换的优越性,同时该标准己在2002年6月底提交OPC基金会会员审阅。     

基于多现场总线的OPC服务器的应用研究

现场总线建立工业控制界的分布式开放系统.与之相适应,为了满足工业控制数据交换的要求,现场总线与系统应用之间的接口也在追求一种标准化,OPC就是这样一种适用于Windows应用程序之间、现场设备和应用系统之间数据交换的标准化接口协议.在现场总线和OPC的基础上,研究了基于多现场总线的OPC服务器的功能模型,并介绍了多现场总线的OPC服务器的技术实现,为今后企业的更高层次的系统集成提供了基础,促进了企业综合自动化的实现.     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.