数据挖掘技术在入侵检测系统中的应用

入侵检测系统是一种主动保护网络资源免受黑客攻击的安全技术，它不仅帮助系统对付外来网络攻击，还可以查知内部合法用户的非法操作，拓展了系统管理员的安全管理能力，入侵检测为系统提供实时保护，被认为是防火墙之后的第二道安全闸门，文章讲述了入侵检测技术，并提出了一种基于数据挖掘技术的入侵检测模型，可发现已知和未知的滥用入侵和异常入侵活动。     

基于数据的挖掘入侵检测技术

入侵检测技术是一种保护网络免受黑客攻击的网络安全技术.它是继防火墙,数据加密等传统安全保护措施之后的新一代网络安全保障技术.为了更有效的适应网络计算模式的发展与挑战,在精确性、可扩展性、适应性方面进行改进,将数据挖掘的思想应用于入侵检测.本文分析了将数据挖掘技术运用到入侵检测系统的体系结构,研究方法及存在的问题.     

入侵检测技术研究概述

入侵检测是保护信息安全的重要途径,是一种新的动态安全防御技术,它是继防火墙之后的第二道安全防线。介绍入侵检测的相关概念,总结了入侵检测系统的功能、分类及入侵检测的过程,并对入侵检测的方法进行了简要分析,为进一步研究提供参考。     

入侵检测在校园网的应用

入侵检测技术是一种主动保护自己免受攻击的网络安全技术。本文针对校园网所面临的安全威胁,结合校园网实际设计了分布式入侵检测系统的应用方案。     

入侵检测系统的研究

在计算机系统与网络环境中,信息系统首先需要考虑的是保护数据和资源免遭未授权的非法访问及操作,甚至恶意入侵和破坏,因此,安全管理日益成为人们关注的焦点,而在诸多的新兴技术中,入侵检测系统以其独特的优点而受到人们的青睐. 文章介绍了入侵检测系统及其现状,说明了现有入侵检测系统的不足和入侵检测技术的发展趋势,并对当前入侵检测系统提出几点改进意见.     

入侵检测技术研究

入侵检测是一种重要的主动安全防御技术，近年来成为安全领域的研究热点．该介绍了入侵检测系统的发展历史及现状，阐述了入侵检测系统的分类和通用入侵检测框架，并详细讨论了各种入侵检测技术．最后讨论了入侵检测技术的发展方向．     

入侵检测技术研究综述

计算机网络的安全已成为国家与国防安全的重要组成部分,而入侵检测技术是保证计算机网络安全的核心技术之一.介绍了入侵检测的概念,指出入侵检测系统具有的功能和入侵检测过程,并对入侵检测系统的分类和入侵检测的方法进行分析,并分析了入侵检测技术的主要发展方向,为进一步研究入侵检测技术提供参考.     

移动Ad Hoc网络的入侵检测技术体系结构

随着移动AdHoc网络的发展和移动计算技术的快速进步,移动AdHoc网络的安全问题和安全策略正受到越来越广泛的重视.传统的防火墙和加密软件保护网络的做法已经不足以解决安全问题,需要寻求更为有效的安全机制,构建新的安全体系结构来保护无线网络.该文描述了在移动AdHoc网络和移动计算环境中的安全体系中的入侵检测技术.提出了一种基于簇的多层移动AdHoc网络入侵检测系统(IDS),并评价了它的关键机制和工作原理.     

一种基于移动Agent分布式入侵检测系统

针对目前入侵检测系统的不足,将新型分布式处理技术移动Agent与入侵检测融为一体,提出了一种基于移动代理的分布式入侵检测系统(DIDS)的模型;实现了基于该模型的分布式入侵检测系统;采取了保证分布式入侵检测系统自身安全的防范措施.通过移动代理,各Agent相互独立,同时能在网络中自由移动,并具有良好的灵活性,降低了网络通信量和系统负载,有效保证系统的安全.     

入侵检测系统之我见

随着网络技术的不断发展,网络环境也变得越来越复杂,对于网络安全来说,传统的安全防护系统已经不能满足当前的安全需求。因此,为了保护现在越来越多的安全信息,入侵检测技术得到了更为广泛的重视。入侵检测系统也已经成为目前系统安全研究中最为活跃、发展最快的领域之一。本文主要是介绍信息安全和入侵检测系统的基本概念,对现有的入侵检测技术进行分析和讨论。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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