基于人工免疫入侵检测检测器生成算法

为了提高基于人工免疫入侵检测系统中从未成熟检测器生成成熟检测器的效率,论文提出了基因库均衡技术,并将基因库进化算法与传统阴性选择算法相结合,设计了分布式人工免疫入侵检测系统中成熟检测器生成算法,实验证明采用基因均衡技术之后提高了整个系统的计算效率。     

一种改进的否定选择算法在入侵检测中的应用

有效的检测器生成算法是入侵检测的核心问题。针对现有算法存在检测率低、匹配阈值固定、检测器集合庞大等问题,通过对人工免疫系统中否定选择算法原理的分析,提出一种生成最有效检测器集的变阈值模糊匹配否定选择免疫算法,并将该算法应用到入侵检测系统中。算法采用随机生成和基因库相结合的候选检测器生成机制,在保证检测器多样性的同时,提高了候选检测器成为成熟检测器的比率。为了消除冗余检测器的产生,提高检测器集的检测效率,算法在模糊匹配的基础上生成有效检测器集。同时,匹配阈值可变,可大幅降低黑洞数量。实验结果表明,该算法提高了入侵检测率,降低了虚警率,整体检测性能较好。     

快速否定选择算法的研究与分析

人工免疫算法具有良好的特性,已被广泛应用于入侵检测、信息恢复、敷据挖掘等领域的研究中,否定选择算法是人工免疫算法中的典型算法,但存在重复检查、检测器查找效率低及逐位比较的时间和空间开销大等问题.我们分析否定选择算法中匹配算法的特点,设计自体、检测器和抗原中检测元素的转换算法,提取自体数、检测数和待检数,引入红黑树建立索引.设计基于红黑树的快速否定选择算法,避免反复提取子串和重复比较寻问题,提高检测效率,最后实现了快速否定选择算法的原型系统,测试、比较了否定选择算法和基于红黑树快速否定选择算法的检测效率,洲试结果表明使用基于红黑树快速否定选择算法检测抗原,能有效的减少比较次数,提高检测效率.     

一种检测器长度可变的非选择算法

检测器生成是非选择算法的关键步骤.已有检测器生成算法在生成检测器时存在"漏洞"区域和冗余检测器问题.提出了一种检测器长度可变的检测器生成算法,不仅可以消除"漏洞"区域,还可以通过相应的检测器优化算法减少冗余检测器,进而提高检测器生成效率和检测效率.对算法进行了分析和实验证明,结果表明,该算法比传统的非选择算法及r可变的非选择算法具有更好的性能.     

基于免疫机制的入侵检测器生成的研究

为了提高基于人工免疫入侵检测系统中有效检测器的生成和检测效率,通过对传统检测器生成算法的研究,结合传统阴性选择算法和缩小检测器长度的方法,提出了一种新的检测器生成算法。实验证明该算法生成的检测器在保证了检测准确性的同时减少了检测所需的时间。     

一种基于多级否定选择的入侵检测器生成算法

文中给出一种改进的基于人工免疫入侵检测系统的否定选择算法。首先是用多级否定选择算法生成不同检测尺度的成熟检测器,然后为了模仿人体免疫系统中的第二次应答机制,引入了记忆检测器的概念及相应的算法,结合亲和力成熟与体细胞突变等方法,将成熟检测器提升为识别率极高的记忆检测器。     

一种基于多级否定选择的入侵检测器生成算法

文中给出一种改进的基于人工免疫入侵检测系统的否定选择算法。首先是用多级否定选择算法生成不同检测尺度的成熟检测器，然后为了模仿人体免疫系统中的第二次应答机制，引入了记忆检测器的概念及相应的算法，结合亲和力成熟与体细胞突变等方法，将成熟检测器提升为识别率极高的记忆检测器。     

面向人工免疫系统的变长检测器快速生成算法

为提高现有非选择算法在检测器生成时的效率问题,设计一种长度可变检测器的快速生成算法。该算法不仅可以消除"漏洞"区域,还可以通过优化减少冗余检测器,提高检测器生成效率和检测效率。实验结果表明,该算法比传统的非选择算法及r可变的非选择算法具有更好的性能。     

否定选择算法在网络入侵检测中改进应用

入侵检测最主要需要解决的问题就是检测器生成算法,然而,当前的算法存在着一些弊端不能很好的解决入侵检测问题,本文基于此在对人工免疫系统中否定选择算法进行研究的基础上,对该否定选择算法在网络如今检测中的改进应用进行研究,并通过实验结果证明,对这种否定选择算法在网络入侵检测中的改进应用,确实提高了提高了入侵检测率,降低了虚警率,表现出较好的整体检测性能。     

面向IDS的可变长检测器生成算法研究

在基于人工免疫的入侵检测系统（IDS）中,检测器集合直接影响检测结果的效率和准确度。针对目前基于人工免疫的IDS中检测效率和漏警率问题,提出了一种可变长检测器生成算法。该算法相对于已有的算法,降低了黑洞区域,减少了冗余检测器,提高了检测器生成效率和检测效率。给出了算法的设计思想、具体步骤以及在入侵检测系统中的具体实现。对算法的分析和实验表明,本算法用于入侵检测系统,提高了检测的准确率,降低了漏警率。同时,对各种异常检测向题具有一定的适用性。     

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.