防范局域网内盗用IP地址的方法

计算机网络的飞速发展和广泛应用已经使得IP地址资源相对匮乏,IP地址被盗用业已成为影响网络运行的重要问题.文章针对Internet网络中存在的安全问题,通过对局域网IP地址盗用的常用方法进行分析,根据TCP/IP理论,提出了四种防范IP盗用的方法,并且都有详细实现过程,还对这些方法的实现效果以及优缺点进行了说明.     

校园网中IP地址的盗用及其防范

计算机网络的飞速发展和广泛应用已经使得IP地址资源相对匮乏，IP地址被盗用也已成为影响网络运行的重要问题。文章结合校园网络环境，总结了常见的IP地址的盗号手段，对IP地址盗用原理和方法进行分析，强调了IP地址盗用对网络安全的危害性，进而提出根据TCP／IP协议栈模型的层次结构，在不同的层次采用不用的防范技术来防止IP地址的盗用，以维护校园网络的正常运行。     

IP地址盗用防范

在当今的TCP／IP网络系统中，特别是按IP流量进行计费的CERNET网络，由于费用是按IP地址进行统计收费的，因此许多用户为了逃避网络计费，使得IP地址盗用现象十分普遍，已经严重地髟响了网络的管理，对网络管理人员及网络用户带来了极大的麻烦，成为网络管理中的一大难题。本文对IP地址盗用原理和方法进行有针对性的分析，进而提出根据TCP／IP协议栈模型的层次结构，在不同的层次采用不同的方法来防止IP地址盗用的防范技术，达到制止非法盗用IP地址的目的。     

校园网环境下IP地址防范技术研究

结合校园网络环境，对IP地址盗用原理和方法进行有针对性的分析，提出根据TCP/IP协议栈模型的层次结构，在不同的层次采用不同的方法来防止IP地址盗用的防范技术。     

IP地址的安全防范技术在校园网中的应用

随着Internet的飞速发展,网络信息安全问题也越来越重要。该文分析了IP地址盗用的常用方法。并对如何实现校园网的安全运行和IP地址的安全防范技术加以讨论。     

通过管理交换机端口来阻止盗用IP地址

目前IP地址盗用行为非常常见，许多用户用盗用地址的行为来逃避追踪、隐藏自己的身份。IP地址的盗用行为侵害了网络正常用户的权益，并且给网络安全、网络的正常运行带来了巨大的负面影响，因此研究IP地址盗用的问题，找出有效的防范措施，是当前的一个紧迫课题。     

校园网IP地址盗用的解决方法

本文介绍几种IP地址盗用的方法，通过对网络教据包的传输原理的分析。通过实例说明了几种防止IP地址盗用的控制方法。     

校园网静态IP地址的安全管理策略

随着计算机和网络的发展和扩大,IP地址的安全管理愈显重要。文章分析了在校园网中IP地址的分配原则和管理制度,IP地址盗用的原因、方法、后果以及查找网络冲突的办法,采用对上网用户身份进行认证,把IP地址、MAC地址、交换机物理端口、VLAN对应绑定的安全策略,在一定程度上杜绝了IP地址被盗用的可能,保证了网络的正常运行。     

如何防止IP地址被盗用

IP地址盗用问题是危害网络管理的一个重要问题,本文就IP地址盗用的方法和一些防范IP地址盗用的手段进行了阐述。     

基于交换机定位及阻断IP地址盗用行为的新机制

IP地址盗用行为是影响网络管理的一个严重问题，文中提出的新机制通过在交换机中获取地址盗用者的MAC地址，来实现IP盗用行及非法接入行为的定位和阻断，快速，高效且不增加网络负担。     

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.