无线局域网安全性剖析

无线局域网已经成为网络体系结构的重要组成部分，同时无线局域网的安全性也越来越受到人们的重视。本文介绍了无线局域网安全的相关概念和基本机制，从加密和认证两个方面，重点分析了无线局域网的安全缺陷，最后讨论了改进的安全措施和方案。     

浅谈无线局域网安全解决方案

无线局域网在当今信息时代的广泛应用,使得越来越多的用户对无线局域网的安全机制提出了更高要求,解决无线网络的安全问题就显得尤为迫切。本文针对无线局域网面临的各种安全威胁,提出几种解决方案,以提高无线局域网的安全性。     

无线局域网的安全性

无线局域网作为最热门的无线通信技术,在全球得到了迅速推广和普及,其安全性也随之受到越来越多的关注。本文通过对无线局域网的安全协议和认证标准方面进行分析改进,着手无线局域网的安全完善。     

浅析无线局域网的安全性

无线局域网已经成为网络体系结构的重要组成部分,同时无线局域网的安全性也越来越受到人们的重视。文章主要介绍了无线局域网安全的相关概念和基本机制,从加密和认证两个方面,重点分析了无线局域网的安全缺陷,最后讨论了改进的安全措施和方案。     

下一代无线局域网安全解决方案

在详细分析了第1代无线局域网的安全缺陷后，提出了基于802．1x的下一代无线局域网安全解决方案，这种方案在用户身份识别和认证、密钥管理等方面有着较强的安全性。     

无线局域网安全性分析

WLAN以其方便、快捷、廉价等优势在企事业内部、公共热点地区、家庭乃至军事领域都取得了长足的发展和巨大的成功。然而伴随着WLAN的应用越来越广泛，人们对无线局域网的安全性的要求也越来越严格，并且制约了该行业的进一步发展．本文就无线局域网的安全性，以及容易受到的安全攻击和相应对策进行讨论。     

无线局域网安全技术探讨

随着计算机技术和通信技术的发展,无线局域网得到快速发展。无线局域网的安全性问题得到越来越多的关注。本文从无线局域网的安全隐患出发,提出几种安全保密技术。     

无线局域网安全性研究

结合笔者在实际工作中的具体应用，分析网络系统安全结构，说明作为开放式传输的无线局域网不会因其传输方式的不同而改变整体网络的安全策略，并通过探讨无线局域网在网络安全方面的特性，分析了无线局域网的安全构架，说明了开放式无线局域网的安全基础。提出了无线局域网的安全和管理策略。     

无线局域网络通信安全研究

经过多年的发展,无线局域网己经成为一种比较成熟的技术,应用也越来越广泛,是计算机有线网络的一个必不可少的补充。无线局域网迅速发展的同时,对网络的安全性也提出了更高的要求。文章研究了现阶段无线局域网面临的主要安全问题,并介绍了相应的解决办法。     

无线校园网安全策略及实施

无线局域网在高校中的应用越来越广泛,这要求无线局域网要根据应用的需求制定出合理有效的安全策略。本文结合笔者在无线校园网管理中的经验,对无线局域网安全技术和安全策略进行比较,提出了构建安全无线校园网的解决策略及改进方案。     

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。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

Call for papers Special issue on Modeling and control technologies for civil,energy,and power systems

正The control of civil,energy,and power systems presents significant new challenges for modeling and control theory.The purpose of this special issue is to provide a forum for researchers and practical engineers to discuss the recent advances in modeling and control technology development for civil,energy,and power systems.Prospective authors are invited to submit their original contributions with the focus on theory or applications of modeling,control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate and promote academic exchange between Chinese and foreign scientists everywhere.