关联规则和事务集分组技术在图书馆个性化推荐系统中的应用研究

通过对经典Apriori算法挖掘过程的分析,提出了基于事务集分组技术的关联算法;该算法先按专业、年级和借阅数量等特性对读者聚类．然后分别对每个类进行关联分析,图书推荐质量较经典Apriori算法有所提高。     

数据库中关联规则挖掘研究与应用

简要地介绍了关联规则,通过对关联分析的经典算法-Apriori算法的分析,发现了经典算法Apriori算法的缺陷,给出了改进的关联规则算法FARM_New算法和基于筛选压缩的Apriori挖掘算。并将其应用到教学质量评估系统中进行对比分析。     

基于矩阵的Apriori算法的优化

在数据挖掘中关联规则挖掘是很重要的一个方面,而Apriori算法是进行关联规则挖掘的经典算法。本文首先分析了经典Apriori算法,然后利用矩阵的思想对其改进,并利用事务压缩的思想对矩阵进行压缩。改进后的算法明显提高了Apriori算法的效率。     

关联规则之Apriori算法的改进

关联规则是数据挖掘的重要研究内容。Apriori算法是关联规则之经典算法。本文在分析经典Apriori算法的基础上．提出了改进型的Apriori算法。新算法采用事务压缩技术,提高了数据挖掘的效率,具有一定的实用性。     

Apriori算法在广播电视发射故障诊断中的应用

探讨了Apriori这一数据挖掘经典算法在广播电视发射故障诊断中的应用。介绍了数据挖掘的提出背景和建模过程,分析了关联规则和经典的Apriori算法的含义及流程,总结了广播电视常见的发射故障,并基于Apriori算法对一个广播电视发射故障的案例进行了分析。     

Web日志处理中Apriori算法及其改进

关联规则是挖掘并且发现大量数据集中有趣的关联或者相关联系。其中最经典的是Apriori算法,但是Apriori算法存在一定的缺陷。文章分析了Apriori算法并且对其进行改进,用一具体实例说明改进后的Apriori算法压缩了事务矩阵,缩小了搜索空间,提高Apriori算法运行效率,从而使整个日志挖掘处理过程更加快捷。     

一种改进的Apriori算法

数据挖掘中的关联规则挖掘能够发现大量数据中项集之间有趣的关联或相关联系,特别是随着大量数据不停地收集和存储,从数据库中挖掘关联规则就越来越有其必要性。通过对关联规则挖掘技术及其相关算法Apriori进行分析,发现该技术存在的问题。Apriori算法是关联规则挖掘中的经典算法。对Apriori算法做了改进。借助0—1矩阵给出了计算项集的支持度计数的更快方法,同时还简化了Apriori算法中的连接和剪枝操作,从而在时间和空间上提高了Apriori算法的效率。     

关联规则挖掘Apriori算法研究综述

关联规则挖掘是数据挖掘中的一项重要技术,Apriori算法是关联规则挖掘中的一种经典算法。在信息技术的发展过程中,随着海量数据的收集和存储,从数据库中挖掘出相关联规则的数据集变得极为重要。为此,对国内外有关Apriori算法的研究现状、算法的原理、优化算法的思想进行了探讨,同时分析了几种经典的优化算法,最后对Apriori算法未来的发展趋势进行了预测和展望。     

基于关联规则的Apriori算法的可视化实现方法

关联规则的提取是数据挖掘中的重要研究内容,对关联规则提取中的Apriori算法进行了分析与研究,针对该算法的运算效率不高,对该算法进行了优化.该算法以经典的Apriori算法为基础,改进后的算法在运算速度明显好于Apriori算法.同时,还介绍了一种基于Apriori算法的可视化挖掘模型[1],并讨论了该可视化模型的实现方法.     

分段支持度Apriori算法及应用

首先指出单支持度的Apriori算法的局限性,分析了目前为克服单支持度Apriori算法的局限性而提出的多支持度的Apriori算法的不完备性,针对事务中的一些潜在规则,提出了一种分段支持度Apriori算法。算法不是简单地对经典Apriori算法进行扩展或改进,而是从理论上破坏了Apriori算法全局、高频两个性质,采用分段支持度的方法对数据库进行数据挖掘,可以发现经典和多支持度Apriori算法不能发现或很难发现的强关联规则,并以较快的速度得以实现。     

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.