基于支持向量的图像相关反馈检索

对图像相关反馈检索过程建立二分类的支持向量机问题模型,进而提出基于支持向量的图像相关反馈检索方法.比较了基于支持向量的反馈检索方法和传统的反馈检索方法的检索性能,研究了特征提取对支持向量机性能的影响.实验结果表明,基于支持向量的图像相关反馈检索方法具有较好的图像检索效果.     

一种新的基于SVM的相关反馈图像检索算法

提出了一种新的基于支持向量机(SVM)的相关反馈图像检索算法。实验结果表明，该算法在一定程度上解决了基于SVM的相关反馈图像检索中存在的样本不足的困难，提高了系统的检索性能。     

一种基于支持向量机的图像检索相关反馈改进算法

相关反馈技术是近年来基于内容的图像检索中较为重要的研究方法．基于支持向量机的相关反馈算法能够在有限的反馈次数内检索出更多的相关图像,取得了较好的效果．本文采用搬运土距离对传统的基于支持向量机的相关反馈算法进行了改进．实验结果表明．改进后的算法能够从一定程度上解决原有算法的在第一次反馈时存在的不稳定问题,提高了检索的准确率．     

集成学习SVM在图像检索中的应用

提出一种基于SVM和Adaboost集成学习相结合的相关反馈算法。在相关反馈过程中选择最具信息的样本训练支持向量机,可以有效减少相关反馈的次数和所需学习样本的数量,通过两者的互补来有效地提高图像检索的精度。最后提出Adaboost算法对SVM分类器进行加权投票,这样进一步提高了图像检索的性能。实验表明,该方法较好地解决了图像检索中的小样本选择问题,能够显著提高图像检索的效率和性能。     

基于IAFSA优化权值的医学图像检索

为提高医学图像的检索结果,提出一种基于改进人工鱼群算法的医学图像相关反馈检索方法 (ISAFA)。提取医学图像的颜色、纹理、形状特征,采用相似度量模型得到图像初步检索结果,根据用户的反馈信息,采用改进人工鱼群算法对特征权值进行调整,以获得更加理想的检索结果。检索结果表明,ISAFA提高了医学图像的检索准确率和检索效率,可以找到满足用户需要的医学图像。     

基于内容图像检索中相关反馈技术的回顾

由于相关反馈技术能有效地提高基于内容图像检索的性能,使它成为图像检索系统中不可少的一部分．近年来相关反馈技术的研究正吸引着越来越多的关注,涌现出了许多算法．在简要介绍了基于内容图像检索后,文中讨论了相关反馈的交互过程和其中的重要环节,进一步分析了相关反馈中的学习问题及其特点,根据相关反馈算法所采用的检索模型把算法分为基于距离度量的方法、基于概率框架的方法和基于机器学习的方法,并在这个分类下对近年来有代表性的一些算法进行了分析和探讨,最后展望了相关反馈技术未来的发展方向．     

一种基于区域综合特征的图像检索方法

提出一种基于目标区域的图像检索方法,首先采用颜色聚类的分割方法将图像分割成不同的区域,提取每个区域的颜色、位置、形状等低层特征,然后提出一种相似度计算方法实现图像的相似性度量。为了提高图像检索的准确度,最后采用支持向量机（SVM）的相关反馈算法。实验结果表明,基于目标区域的图像检索效果比基于全局图像特征的检索效果有较好的改善。     

基于目标区域和相关反馈的图像检索

提出了一种基于目标区域和相关反馈的图像检索方法,首先采用改进的K均值无监督分割方法将图像分割成区域,然后提取每个区域的颜色、位置、形状特征进行相似度计算;最后采用基于支持向量机（SVM）的相关反馈算法提高检索精度。实验结果表明,方法具有良好的检索性能。     

基于BP网络的相关反馈在图像检索中的应用

在研究图像检索基本理论基础上,提出基于主色提取和主色集扩充的图像检索算法,并运用基于BP网络的相关反馈方法提高算法性能,通过开发图像检索系统并进行检索实验,验证了算法的检索性能及BP网络相关反馈算法的有效性.     

相关反馈中基于负例监督的特征过滤策略

相关反馈是提高检索精度和消除"语义鸿沟"的一种非常有效的方法.提出了一种新的特征过滤策略,该策略通过负例监督的方法构造一个特征过滤器,来选取正例样本独有的特征,然后采用一种基于最近邻分类思想的相似性度量方法对去除了不相关特征分量的候选图像进行排序.通过与传统相关反馈方法的比较,表明了该算法的高效性.     

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.