利用MPLS VPN技术构建政府虚拟纵向业务专网

通过对正迅速走向成熟的MPLS VPN技术的介绍，讲述了在政府信息化建设中，利用MPLS VPN技术在公共网络基础设施之上构建业务部门纵向虚拟专网，有效地将政府各级业务部门的局域网连成一个网络整体，实现信息的安全传输。     

基于MPLS VPN的电子政务外网构建技术

简要阐述了MPLS VPN技术及特点,分析了在公共网络基础设施上利用MPLS VPN技术构建电子政务专网的技术问题,提出了应用MPLS VPN技术实现电子政务专网的构建方案.通过四川省某市电子政务专网的建设,有效地实现了将市政府各部门的局域网连成一个整体,同时实现了信息的安全传输,取得了良好的社会效益.证明了基于MPLS VPN的电子政务外网构建技术具有应用流畅、涵盖范围宽、灵活实用等优点.     

基于MPLS建立VPN的研究

文中简单介绍了VPN的技术基础，分析了它在几个典型传统网络上的应用，提出基于MPLS建立新一代VPN的可行性，概述了MPLS的基本原理及其特点，分析了在MPLS上建立VPN的优点和实现它的关键技术，并且提出了MPLS＿VPN有待解决的问题。     

基于MPLS网络的加密技术

MPLS(多协议标签交换)是一种可提供高性价比和多业务能力的交换技术，MPLS将成为未来网络演进中的核心技术之一。该首先从MPLS的基本概念着手，分析MPLS网络的特点和原理；接着分析了适合于MPLS网络的加密技术及密钥管理；最后讨论了MPLS网络密码设备的实现。     

用MPLS VPN构建电子政务外网的安全性分析

本文在简要介绍了政务内网和政务外网的概念,MPLS VPN构建电子政务外网原理的基础上,分析了利用MPLS VPN技术构建电子政务专网的安全性。     

MPLS/BGP VPN在云南电子政务网中的应用

该文首先介绍了目前流行的MPLS/BGP VPN技术,在深入了解MPLS/BGP VPN技术的基础上,结合云南省电子政务网的特点,以几个专网为例,介绍了MPLS/BGP-VPN技术在云南省电子政务网上的应用。     

BGP/MPLS IP VPN的IPv6扩展研究

介绍BGP／MPLS IP VPN技术，又称三层MPLS VPN，它使用BGP进行路由信息的分发和使用MPLS进行包转发，具有较好的服务质量。重点分析BGP／MPLS IP VPN网络在IPv4和IPv6中的应用，并对基于Carrier of Cartier VPN的BGP／MPLS VPN的IPv6扩展方案进行研究，此方案提供了运营级的解决方法，并能利用现有的IPv4资源，有较好的灵活性和扩展性。     

基于MPLS的移动IP技术研究

根据MPLS网络对移动性支持的需求，在MPLS研究的基础上，对基于MPLS的移动IP技术进行了深入的研究。首先详细介绍了MPLS和移动IP的基本原理。然后叙述了基于MPLS的移动IP技术的实现方案。并认为移动IP技术移动互联网发展的重点。     

基于MPLS网络的VPN技术与移植

讨论了基于MPLS 网络的VPN技术与移植。首先，通过介绍VPN的概念，引伸出VPN的模式。其次，介绍了MPLS VPN的网络概念和网络结构及与传统VPN网络的区别。最后，介绍从传统的VPN网络移植到MPLS VPN网络中所要满足的条件和移植的方法。     

电信级路由器的MPLS技术原理及性能测试

介绍了基于路由器的多协议标记交换（MPLS）技术出现的相关背景，以及MPLS的网络结构、节点体系结构和标记交换的工作过程，分析了目前MPLS技术的优点和不足，搭建了MPLS网络的测试环境，并利用该组网环境采用国内某通讯公司的路由器进行了性能测试。测试结果较真实地反映了被测路由器的MPLS性能。     

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.