入侵检测技术的分析与发展趋势研究

入侵检测系统作为一种主动检测系统,在入侵预警、实时阻断或隔离攻击等方面具有非常积极的意义。本文从入侵检测技术的基本工作原理出发,对入侵检测技术进行了系统的分类,归纳和比较了各种系统的优缺点。最后,总结了入侵检测技术面临的主要问题,分析入侵检测技术的主要发展方向。     

基于数据挖掘的入侵检测系统的研究

通过对入侵检测技术和数据挖掘技术的研究,提出了一种基于数据挖掘的入侵检测系统,该系统具有可扩展性、自适应性、准确性等特点。对数据预处理模块,数据挖掘模块,入侵检测模块进行了设计。     

基于．NET气门尺寸检测系统软件架构设计

光学非接触检测是随着机械制造技术、计算机视觉技术、图像处理技术等发展而出现的新兴检测技术。传统人工手段对气门尺寸的检测往往存在效率低、可靠性差、检测精度不高、成本高、容易出错等弊端,采用光学非接触检测技术不仅可以提高检测的效率、精度和可靠性,同时可以降低成本和出错率。文中在阐述了系统的硬件结构和基本工作原理的基础上,通过分析实际生产需求,结合．NET技术框架,提出了符合实际需求的检测系统总体架构,并开发了汽车发动机气门尺寸自动检测系统,实现了系统各个功能模块并合理地解决了模块之间的联系,通过高精度算法检测出零件参数。该系统已应用于实际生产中,取得不错的效果。     

基于Snort的入侵检测规则匹配技术研究

入侵检测系统(IDS)继数据加密、访问控制、防火墙等安全技术之后,目前成为信息安全领域内一个活跃的研究课题。该文从IDS检测规则的规则匹配技术展开,并以网络入侵检测系统为例,介绍了几种不同类型规则匹配技术,并对开放源码的网络入侵检测系统—Snort2.6进行了详细的检测规则分析。     

数据挖掘技术在网络入侵检测中的应用

网络安全作为计算机网络技术发展的重心,网络用户也采取多种防护技术来保护计算机网络,比如,防火墙、入侵检测技术等。本文对网络入侵检测技术进行分析研究,找出现有入侵检测技术中存在的问题,提出将数据挖掘技术应用到入侵检测中,探讨如何将数据挖掘算法应用到入侵检测系统中去,设计出一个基于数据挖掘的网络入侵检测系统。     

工业控制系统入侵检测技术的研究及发展综述

入侵检测是工控安全防护技术的重要组成部分。针对工控系统入侵检测技术的研究与应用,分别从检测特征、算法设计、应用环境等角度对目前的研究工作进行总结,介绍入侵检测在保障系统安全运行中的实际应用,讨论了工控入侵检测技术研究的关键问题。为提高工控入侵检测技术的异常行为防御能力,根据工控系统环境的复杂性和入侵检测的特殊性,对相关研究中存在的问题与不足进行分析,并结合工业控制系统网络化与信息化的发展现状和不断增强的安全防御要求,对工控入侵检测研究进行展望,提出了与大数据处理融合、智能化检测系统等的发展方向。     

基于数据挖掘的入侵检测系统研究

针对传统入侵检测方法的缺陷：结合异常检测和误用检测方法,提出了一种改进型的基于数据挖掘的入侵检测系统。论述了数据挖掘技术在入侵检测系统中的应用。对常用于入侵检测系统中的数据挖掘技术如关联规则,序列分析,分类分析等进行了分析。     

基于红外技术高精度车流检测系统设计

设计了一种应用于高速路口、路段高精度实时车流检测系统。系统利用红外传感光电转换特性,以AT89C51单片机作为核心控制单元对检测信号进行处理,运用光学技术、电子技术、计算机辅助技术、单片机技术、PC接口技术等实现高精度、高稳定性和快速响应的道路车辆速度检测报警系统。介绍了系统构成、软硬件设计方法。与传统的检测系统相比,安装调试简单、工作可靠,通过程序扩展,可应用于交通运输、食品加工、工业生产、科学研究等设备中,有广泛的实用价值和应用前景。     

数据挖掘技术在入侵检测系统中的应用

入侵检测是网络安全管理中的一项安全措施,可以有效发现和弥补网络安全漏洞和缺陷。但是随着网络流量的增加以及网络攻击形式的多样化发展,入侵检测系统的技术也不断完善,当前数据挖掘技术成为入侵检测系统的重要技术形式。笔者主要对入侵检测系统技术形式、数据挖掘技术的具体应用方式等进行具体分析和讨论,希望能够促进网络安全管理工作的进一步开展与优化。     

带钢表面质量在线检测系统研究与设计

为了提高现有带钢表面质量检测技术在缺陷检测精度与识别率上存在的问题,设计了基于机器视觉技术的带钢表面质量自动检测系统,从系统整体构成、视觉传感系统、软件开发及检测与分类算法等方面进行了深入地研究,实现了包括图像的采集、传输、缺陷的实时检测和定位,缺陷的分类以及缺陷的存储与报警等功能;实验结果表明,该系统可以对带钢表面常见的边裂、氧化、结疤等几十种不同类型的缺陷进行精确地检测;与现有的缺陷检测技术相比,该系统中设计的算法在检测精度和实时吞吐量上都具有很大优势.     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。