高可管理性道岔融雪远动控制网络

为增强铁路道岔融雪系统的灵活性和可管理性,进行可控的远动中心分段监控,提出在远动控制网络上应用虚拟路由传输精简版(VRF-Lite)对网络路由信息分组,实现系统分段.在简易网络环境中进行了基于VRF-Lite的远动控制网络组网实验.实验结果证实,通过在路由器上进行软件配置,网络通信实现分组,分组结构灵活易控.由此得出,应用VRF-Lite技术不仅可使远动控制网络保持对融雪系统通信的支持,而且有效提升系统可管理性.该技术可作为融雪系统项目实施和系统优化的备选方案.     

变电站综合自动化系统远动指标统计算法

为了提高变电站综合自动化系统远动指标统计分析能力,需要对变电站综合自动化系统远动指标进行统计处理,提出一种基于模糊聚类和关联规则挖掘的变电站综合自动化系统远动指标统计分析算法。采用分段检验分析方法进行变电站综合自动化系统远动指标的信息采集,提取变电站综合自动化系统远动指标的关联规则特征量,结合模糊融合聚类方法进行变电站综合自动化系统远动指标的大数据聚类处理,采用互信息特征检测方法,进行变电站综合自动化系统远动指标的大数据挖掘和信息检测,根据特征检测结果采用分段模糊聚类方法进行特征归类处理,在聚类空间中实现变电站综合自动化系统远动指标统计分析。仿真结果表明,采用该算法进行变电站综合自动化系统远动指标的统计分析能力较强,大数据聚类性较好,提高了指标统计分析和决策能力。     

基于IEC60870-5-104远动规约的通信技术在电厂SIS系统中的应用

介绍了国际电工委员会(IEC)制定的IEC60870-5-104远动规约.详细阐述了该规约的网络参考模型和通信实施过程.根据工程实践,介绍了基于IEC104规约的网络通信技术在远动终端和SIS系统之间的应用.最后展望了该通信技术在火电厂SIS系统中的广泛应用前景.     

基于互联网的数字电能计量管理系统

介绍了一种基于互联网的电能管理系统，该系统是利用Modem通过公用电话网实现远程通信，构成一个数据传输网络，实现对电能各种指标自动监测及远动控制和用电管理自动化，用户可以通过互联网实时查询用电情况及电能指标。     

基于以太网的电能计量采集装置的设计

传统的电能计量计费装置通过本地232中继、484远传、GPRS通信或者电台通信使主站用户得到实时数据,往往这些主站只和电力营销部门相关,作为电力消费结算的依据,而并没有接入到电网的调度自动化系统,这使得大用户的信息不能共享给全局调度系统.本装置通过采用以太网技术实现远动设备及系统的102规约,使其能够接入调度自动化系统,为电网调度的统筹安排提供一线大客户数据.     

计算机通信技术在网络管理中的应用探讨

经济的发展,通信系统也在发生着变化,计算机通信系统已经逐步的向网络化的趋势发展,并且结合网络的技术设计新型的远动通信系统的模型,建立了该系统的网络结构的基本模型,本文主要根据计算机通信技术在工作进行了讨论,如何在投入较少的情况下实现多个厂商互相通信通信的功能,利用可利用的资源,例如已有的网络通道和内部的资源,对信息保护进行分析和研究。     

解析电力自动化中电力远动测试系统的应用

由于电力自动化系统及其设备呈多样化的发展趋势,所以,在电力自动化系统运行的过程中,当通信系统出现故障后,检修人员很难及时判断故障的位置,这会影响电力系统运行的稳定性。将电力远动测试系统应用在电力自动化系统中,能有效地解决通信故障判断难的问题,因此,电力远动测试系统对电力自动化系统的稳定运行具有十分重要的作用。     

远方终端装置

在电力调度自动化过程中,远动信息是一个不可缺少的环节。如果没有完善的信息收集系统,即使使用了先进的计算机系统也难以发挥作用。电力远动装置就是远动信息处理装置。远方终端装置(RTU又称微机智能远动装置)是继模拟式和数字式电子远动装置后,基于微处理机的现代电力智能远动装置。它有数字式远动装置无法比拟的智能功能,并且有着广泛的应用领域,大有取代传统的数字式远动装置的趋势。     

基于CAN总线的配电网户外柱上型重合控制器的设计与实现

介绍了一种基于CAN总线的中压配电网户外柱上型智能重合控制器,以16位工业级微控制器Intel87C196KC为核心,应用现场总线和智能化技术将保护、测量、控制、计量、远动和故障诊断等综合自动化与配电自动化功能就地分散到户外开关设备本体上,采用CAN总线作为系统的通信网络,实现了配电设备的户外全分布式方案。     

基于计算机技术的通信自动化控制系统设计与应用

通信控制系统可以充分利用计算机技术,实现自身的自动化。因此,笔者以基于计算机技术的通信自动化控制系统的设计方法为研究重点,分析了通信自动化控制系统在功能和性能方面的设计要求,总结了当前国内通信自动化控制系统的设计方式。通信自动化监控系统、网络系统、网络管理等方面的设计都是通信自动化控制系统的设计内容。     

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.