基于WCF的网络聊天应用程序

通过介绍WCF通信模型,向大家展示定义和实现WCF服务,并何构建面向服务的应用程序,构建一个简单的网络聊天应用程序详细说明了编写客户端-服务端应用程序的步骤,并且让大家了解WCF框架的强大。     

基于WCF与P2P的分布式大规模考试平台实例研究

利用WCF框架技术可以快速构建面向服务的分布式应用系统,提高系统的可扩展性和稳定性,实现考试题型的灵活扩展,而P2P技术以节点平等为核心,以高效的方式向需要资源的节点分发内容,解决大规模考试过程中大批量数据传输而导致服务器过载的问题。该文在分析WCF和P2P应用开发技术的基础上,介绍了利用WCF和P2P技术的大规模考试平台架构的实现原理。     

基于WCF和对等网络的即时通信软件的设计与开发

介绍了Microsoft用于构建分布式面向服务架构的新一代框架WCF（WindowsCommunica—tionFoundation）的体系结构与技术要素;同时分析了对等网络（Peer—to—Peernetwork）的基本原理和网格化特性。在分析WCF和P2P网络优点的基础上开发了一个即时通信软件,总结了使用．NET平台开发P2P应用的基本步骤,阐述了对等网络是开发P2P应用的理想平台。     

运用WCF技术实现项目工程的自动更新

WCF是微软在分布环境下,对各种网络技术进行整合的技术,为RIA程序开发提供了很好的开发框架,运用WCF技术,可以很方便地实现项目软件自动更新应用。该文主要介绍如何运用WCF技术实现软件的自动升级。     

基于WCF架构的应用开发研究

介绍了面向服务的WCF架构的基础知识及运行机制,分析研究了其用于分布式开发的服务框架模型,阐述了WCF在一般场景应用中服务端、宿主、客户端的开发流程,为深入学习基于WCF的分布式应用开发提供参考。     

基于WCF的即时通信软件的设计与实现

介绍了Microsoft用于构建分布式面向服务架构系统的新一代框架WCF的体系结构与技术要素,并通过开发一套即时通信软件展现了基于WCF构架开发分布式应用程序的编程方法与技巧。     

基于WCF的DES数据加密设计与实现

WCF服务技术与DES算法相结合,通过对微软WCF服务技术分析及原理介绍,对WCF服务的设计、配置、使用DES类对WEB中数据实现加密与解密..NET Framework封装了DES加密类,为数据加密提供方便,DES算法高效可行,再利用WCF面向服务编程技术优点,应用WCF框架提供高效实用的DES加密解密服务,达到We...     

利用Vista新技术WCF开发构建服务系统

WCF(Windows Communication Foundation)是微软基于SOA(Service Oriented Architecture)推出的.Net平台下的框架产品,它代表了软件架构设计与开发的一种发展方向.本文通过一个详细的例子介绍WCF开发构建服务的实现过程.     

基于WCF的安全技术的应用

Windows Communication Foundation（WCF）作为一个真正的面向服务的产品,已经改变了面向对象、面向组件等通常的开发模式。分析了WCF与微软其它分布式计算技术的相似和不同之处,然后重点研究了WCF的架构,指出了WCF在构建分布式应用中的优势。最后提出了基于WCF的安全应用,设计了使用密钥加密法的消息层次安全性的安全模型。     

WCF技术在中小企业的应用

随着企业业务的发展,交互的数据量以及业务复杂度越来越大,现有系统存在的问题(如各个子系统之间的高耦合)逐渐显现出来。以某系统改造项目为背景,探讨如何通过SOA构建一个安全可靠、低耦合和支持事务处理的解决方案。通过对Web Service(XML Web Service)技术和WCF(Windows Communication Foundation)技术相对比,阐述了基于WCF技术的解决方案。最后对WCF的核心技术进行分析,并论述如何应用WCF技术构建一个更安全,更灵活的处理系统。     

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.