NOVELL网络点对点安全通信的研究

分析了ＩＰＸ／ＳＰＸ协议的特性,研究了基于ＮＯＶＥＬＬ网络环境下工作站之间实现点对点数据安全传输的技术,讨论了安全机制的主要设计方法。     

Classical IP Over ATM规范（上）

ＡＴＭ（异步传输模式）技术是目前最受人瞩目的高速网络技术之一，如何使ＡＴＭ网络与现有的网络协议（如ＴＣＰ／ＩＰ）相结合是ＡＴＭ技术发展的关键性问题。本文通过对比分析了在ＡＴＭ局域网与传统局域网上ＩＰ协议实现的异同，并较为深入地介绍了在ＡＴＭ上运行ＴＣＰ／ＩＰ协议的技术方案。     

互联网协议与异步传输模式

本文介绍了互联网协议和异步传输模式的结合技术（ＩＰ ｏｖｅｒ ＡＴＭ）,主要有ＡＴＭ之上的多协议封装、经典ＩＰ网、网仿真和ＭＰＯＡ等技术,并以此分析了两者结合的原因、要点和形式。     

互联网协议与异步传输模式

本文介绍了互联网协议和异步传输模式的结合技术（ＩＰ ｏｖｅｒ ＡＴＭ）,主要有 ＡＴＭ之上的多协议封 装、经典 ＩＰ网、局域网仿真和 ＭＰＯＡ等技术,并以此分析了两者结合的原因、要点和形式。     

IP电话及其在线缆调制解调系统上的应用

ＩＰ电话采用的信道复用和基于分组交换的传输技术提高了线路传输利用率。ＨＦＣ网双向改造的完成和 ＤＯＣＳＩＳ的不断完善为开展 ＩＰ电话增值业务提供了理想的接入网平台。本文研究了ＩＰ电话技术的现状、发展趋势,以及 ＩＰ电话的标准 Ｈ．３２３规约、 ＳＩＰ、 ＭＧＣＰ、 ＲＴＰ／ＲＴＣＰ和ＲＳＶＰ。最后介绍了一种国内开发的 ＨＦＣ网上ＩＰ电话应用系统。     

利用JAVA实现远程图像的传输

本文介绍利用Ｊａｖａ语言、ＴＣＰ／ＩＰＳｏｃｋｅｔ和图形显示的双缓冲技术来实现Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ方式下的远程图像的传输。     

Windows95中的三种网络协议

协议是计算机通过网络彼此交流的一种“语言”。不同计算机之间必须使用相同的网络协议才能进行通信。Ｗｉｎｄｏｗｓ９５提供了三种网络协议：ＩＰＸ／ＳＰＸ、ＮｅｔＢＥＵＩ和ＴＣＰ／ＩＰ,三者面向不同网络需求和规模,各有优势。１、ＩＰＸ／ＳＰＸＩＰＸ／ＳＰＸ是...     

Internet与TCP／IP协议及其新进展

本文简要叙述了计算机网络与Ｉｎｔｅｒｎｅｔ及其协议ＴＣＰ／ＩＰ的发展，重点介绍了ＴＣＰ／ＩＰ协议的组成及与ＩＳＯ／ＯＳＩ参考模型的联系与区别。同时指出了Ｉｎｔｅｒｎｅｔ及ＴＣＰ／ＩＰ的局限性，并介绍了ＴＣＰ／ＩＰ的发展动态及最新技术     

宽带IP网的崛起

本文论述了ＡＴＭ 兴衰和宽带ＩＰ 网的产生和发展。并讨论了基于ＴＣＰ／ＩＰ 的实时传输标准和它在三网融合中的地位     

TCP／IP通信协议探讨

本文详细介绍了ＴＣＰ／ＩＰ协议的内容,并讨论了ＴＣＰ／ＩＰ协议的分层结构和ＴＣＰ／ＩＰ的几个协议。除此之外,总结了ＴＣＰ／ＩＰ协议的特点,并指出了讨论ＴＣＰ／ＩＰ协议的意义。     

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.