民航旅客服务信息系统告警关联规则挖掘

告警关联规则挖掘是进行系统故障诊断、定位的重要方法。由于民航旅客服务信息系统的各子系统之间的关联关系,子系统一旦出现故障,会报出大量甚至海量的告警信息,使得维护人员在大量告警数据面前无法准确进行故障定位。针对故障诊断、定位等难题,提出基于滑动时间窗口框架的关联规则挖掘方法,在大量告警信息中寻找故障源、故障因素之间的关联。实验结果表明,提出的方法能准确、快速地发现有价值的告警关联规则,为系统维护人员提供决策支持。     

一种基于粗糙集理论的规则提取方法

规则提取是实现智能信息系统的重要环节,也是一个难点。针对信息系统中的规则提取问题,提出了一种基于粗糙集的研究方法,并对规则提取涉及到的属性约简、属性值约简等问题进行了研究。根据粗糙集中的不可分辨关系建立了可辫识向量,以利用可辨识向量的加法法则运算求得核属性以及属性重要性,然后以核属性为基础、属性重要性为启发信息,求得信息表的一个属性约简。在此基础上,利用条件属性与决策属性之间的对应关系,对信息表中的每条规则通过删除冗余属性值来完成信息表的属性值约简,最终实现规则提取。数值实例和试验表明本算法是有效、可行的。     

基于粗糙集的柴油机故障诊断系统设计

利用基于粗糙集的知识约简和决策规则提取算法,将柴油机故障信息值进行约简,求出其决策规则,完成柴油机的故障信息条件属性值约简和决策规则提取程序设计.采用正向推理及相关控制策略实现推理机,完成故障诊断系统的诊断推理操作.基于粗糙集的属性约简和决策规则提取十分有效,大大减少了推理的时间,提高了系统的工作效率.     

一种基于区分度矩阵的属性约简及规则提取算法

在RoughSet理论中属性最小约简及规则提取是NP-hard的。通过研究Rough Set理论中属性约简和值约简问题,提出了区分度矩阵的概念,同时利用矩阵中属性区分度的信息,提出了一种获取属性约简及规则提取的简化算法。实验结果表明,该算法是正确、有效、可行的。     

民航旅客不文明行为信息自动匹配方法

为实现民航旅客不文明行为信息与规则自动匹配,提出一种将胶囊网络与门控循环单元结合的民航旅客不文明行为信息与规则自动匹配的方法.充分利用文本语义信息,进行文本相似度的计算,有效解决传统方法在民航旅客不文明行为信息中存在繁杂、无用信息的干扰导致效率低且需大量人工成本的问题.通过在两个公共数据集和民航旅客不文明信息数据集上的实验,验证了该设计的准确性和有效性,为民航旅客不文明行为信息与规则的自动匹配提供了方法支持.     

民航旅客不文明行为信息自动匹配方法

为实现民航旅客不文明行为信息与规则自动匹配,提出一种将胶囊网络与门控循环单元结合的民航旅客不文明行为信息与规则自动匹配的方法.充分利用文本语义信息,进行文本相似度的计算,有效解决传统方法在民航旅客不文明行为信息中存在繁杂、无用信息的干扰导致效率低且需大量人工成本的问题.通过在两个公共数据集和民航旅客不文明信息数据集上的实验,验证了该设计的准确性和有效性,为民航旅客不文明行为信息与规则的自动匹配提供了方法支持.     

基于概率覆盖决策粗糙集模型的中医菜谱分析

针对营养决策表规则提取中规则矛盾多、覆盖样例冗余多,导致有效规则遗漏的问题,提出概率覆盖决策粗糙集模型.首先,对决策粗糙集相关理论进行简要介绍,给出对应的属性约简和值约简理论和算法.然后,在决策粗糙集基础上,提出概率覆盖模型,根据值约简需求提出一、二、三度覆盖矩阵,以解决规则矛盾和冗余问题.最后,通过中医菜谱数据提取营养学规则实验,证明所提模型可有效解决规则矛盾问题,相比其他常用规则提取模型,概率覆盖模型所得规则约简力度较高,矛盾个数较少.     

基于粗糙集的变电站故障诊断规则提取方法研究

运用粗糙集理论研究了变电站故障诊断规则提取,提出了基于属性重要度和分辨矩阵的诊断规则提取算法.通过改进基于属性重要度的粗糙集属性约简算法,得到决策表的一个最小约简,然后将分辨矩阵引入值约筒中得到决策规则.采用该算法对变电站故障决策表进行属性约简和值约简,抽取出变电站故障诊断的精确规则库进行故障诊断.实验结果表明了该方法的有效性.     

基于属性约简算法的民航蓄电池故障仿真

在民航电力供应系统保证安全无故障问题的研究中,为了降低民航蓄电池故障诊断决策的复杂性,提高诊断决策的准确性,在研究粗糙集理论的属性约简算法的基础上,给出一种基于区分链表的属性约简算法,并将算法应用于某民航蓄电池故障诊断研究实验中,通过约简删除了故障数据集中冗余的故障特征属性,为蓄电池的故障诊断决策提供了信息条件,并进行仿真.仿真结果表明算法有效地解决了民航蓄电池中的故障特征冗余问题,提高了民航蓄电池故障诊断的准确性和有效性,取得了良好的应用效果.     

基于单变量决策树的网络故障诊断方法

在网络故障诊断系统中,利用粗糙集理论约简反映网络信息的MIB变量,得出最有利于分类的变量集合.通过对约简结果构造单变量决策树的方法提取相应的决策规则,判断网络故障类型.实验结果表明,决策树构造方法简单,且提取出来的规则以决策树形式表示,规则易于理解、网络故障诊断效率较高.     

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.     

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.