基于防火墙的Internet／Intranet安全解决方案

随着Ｉｎｔｅｒｎｅｔ／Ｉｎｔｒａｎｅｔ技术的飞速发展,企业构建Inｔｒａｎｅｔ并且接入Ｉｎｔｅｒｎｅｔ已经成为一种趋势,因而如何在Ｉｎｔｅｒｎｅｔ和Ｉｎｔｒａｎｅｔ之间进行安全通信也成为一个亟待解决的问题。基于防火墙的安全方案正是解决此问题的关键所在,文章以具体的防火墙产品为例,探讨了３种不同层次需求的安全解决方案,以满足不同层次用户的需求。     

怎样更有效地接入Internet网

本文论述了Ｉｎｔｅｒｎｅｔ网络的接入原理，并具体说明了单机接入和局域网接入等常用的二种Ｉｎｔｅｒｎｅｔ接入方式及其特点。     

局域网接入Internet全新解决方案登场──世纪互联推出企业局域网接入Internet产品及解决方案

局域网接入Ｉｎｔｅｒｎｅｔ全新解决方案登场世纪互联推出企业局域网接入Ｉｎｔｅｒｎｅｔ产品及解决方案８月２７日，世纪互联“企业局域网接入Ｉｎｔｅｒｎｅｔ产品及解决方案发布会”在中国科技会堂隆重举行。此次发布会世纪互联向所有局域网使用者、管理者介绍了先进...     

开启Internet之门

开启Ｉｎｔｅｒｎｅｔ之门文图：采编部本组文章特为那些至今仍徘徊在Ｉｎｔｅｒｎｅｔ大门之外的人们讲解Ｉｎｔｅｒｎｅｔ的发展史、在中国的火爆、Ｉｎｔｅｒｎｅｔ的强大功能、选择合适的接入服务商及简明的接入Ｉｎｔｅｒｎｅｔ操作指南。希望您看后尽快着手连入Ｉｎ...     

校园网的HFC宽带Internet接入

本文介绍了Ｉｎｔｅｒｎｅｔ接入技术，并重点阐述了ＨＦＣ（光纤同轴混合）网接入技术和深职院校园网ＨＦＣ宽带Ｉｎｔｅｒｎｅｔ接入方案与实施，特别对实施过程中遇到的特殊问题进行分析并给出了解决方案。     

连入Internet

连入Ｉｎｔｅｒｎｅｔ前面介绍了Ｉｎｔｅｒｎｅｔ的历史、现状、功能及ＩＳＰ的选择等，现在我们简单介绍一下主要接入方式。Ｉｎｔｅｒｎｅｔ的接入主要有三种方式：终端拨号、ＰＰＰ拨号及专线接入方式，前两种适宜家庭、个人或公司、企业，专线接入方式针对集团用户，...     

西风东渐欧洲部分国家的电信市场新动向

西风东渐欧洲部分国家的电信市场新动向Ｉｎｔｅｒｎｅｔ作为全球性的新型通信手段，它与传统通信之间的关系越来越密切，一方面，Ｉｎｔｅｒｎｅｔ电话等新型应用的可能性给传统通信带来挑战；另一方面，传统的通信基础设施仍然是Ｉｎｔｅｒｎｅｔ赖以发展的根本。因此，...     

Windows环境下的Internet入网方法和软件工具

本文首先介绍了ＭＳ Ｗｉｎｄｏｗｓ用户经ＰＣ串行口拨号接入Ｉｎｔｅｒｎｅｔ网的一般概念，进行叙述了典型入网软件的功能、从Ｉｎｔｅｒｎｅｔ网上获取软件的方法和安装使用要点。     

信息接入和Internet

信息接入和Ｉｎｔｅｒｎｅｔ文：安西林绝大部分人向Ｉｎｔｅｒｎｅｔ贡献或索取的都是信息，这些信息储存在成千上万的各种网上服务器中。那么如何有效通过Ｉｎｔｅｒｎｅｔ进行信息交互活动，如何使自己的信息融入Ｉｎｔｅｒｎｅｔ，充分发掘信息的商业价值而受益各方，...     

ADSL——网上冲浪新途径

分析了非对称数字用户线的技术特点及其在Ｉｎｔｅｒｎｅｔ的接入和应用、发展前景。     

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。