石龙广电三网融合设计与实现

本文以石龙广电HFC网络为基础,基于IP技术实现有线电视网和计算机数据网融合;同时利用下一代网络（NGN）技术,通过广东铁通软交换平台,解决了软交换中语音的QoS保障及穿透NAT/FW设备关键技术等相关问题,完整的设计实现了三网融合。     

IPSec安全协议与软交换网络

软交换是话音网向数据网融合的下一代网络(NGN)的主要技术。在软交换网络中应用IPSec协议来保证网络安全,是软交换技术的一项重要内容。IPSec是一个工业标准网络安全协议,它使用了严格的密码认证协议和加密算法来保证IP通信的完整性和保密性。     

软交换网络实验教学的探索与实践

在分析当前三网融合背景下电信软件行业发展趋势以及对电信软件人才需求特征的基础上,指出软交换网络实验教学的必要性和重要性,提出软交换网络实验的教学目标,阐述软交换网络实验教学体系构建的基本原则,介绍软交换网络实验教学内容。     

面向主题资源的下一代通信网第三方业务平台技术研究

下一代通信网络NGN采用软交换技术将使PSTN网、IP网、移动网三网融合,第三方业务与呼叫控制分离,业务提供方无需关注通信协议。本文利用WebServices技术整合分散的网络教育资源,提出了一种面向主题资源的具有服务等级SLA的下一代通信网第三方业务平台体系结构,研究了业务平台与软交换的通信协议、服务等级管理等。     

软交换和IMS关系

IMS(IP Multimedia Subsystem)是IP多媒体系统,是一种全新的多媒体业务形式,它能够满足现在的终端客户更新颖、更多样化多媒体业务的需求.IMS能够解决移网与固网融合,引入语音、数据、视频三重融合等差异化业务的重要方式.软交换是一种基于公共的分组承载网络,呼叫控制与承载相分离,业务控制与呼叫控制相分离,能够承载语音、数据和多媒体等多种业务的一种交换技术.软交换和IMS都是属于NGN的业务网.软交换从设备的实现可以平滑到IMS.逐渐形成IMS+软交换的网络架构.     

下一代网络的核心技术——软交换

网络的融合与发展已是一个不争的事实,下一代网络(NGN)是很有发展潜力的新兴网络技术。本文着重介绍了NGN中的核心技术——软交换,提出了软交换的体系结构,阐述了软交换的协议与标准,介绍了目前软交换技术的应用,最后分析了发展软交换需要解决的问题。     

基于软交换技术的远程教育电视系统的实现

提出了一种在单向有线数字电视HFC网和IP网上采用软交换技术I、P技术的远程教育方法,并将该方法加以实现。通过软交换体系使HFC网和IP网能够互通互用,较好地解决了广播电视HFC网I、P网分别开展远程教育所带来的网络拥塞、时延、QoS保证及双向互动等不足,为远程实时教学提供了一种可行方案。     

移动长途汇接网中的软交换技术

现如今通信网络开始朝着NGN网络发展趋势很明显,在此发展过程中,软交换技术得到了广泛的应用和快速发展。无论是固定网络还是移动核心网络,它们都使用了软交换技术。随着移动长途业务逐渐增多,运营商也开始扩宽移动长途的汇接网络,而软交换则是网络演进过程中必要技术支撑。文中就软交换技术在移动长途汇接网中的应用作了大致的分析,以期为我国软交换技术的发展提供可供参考的意见和建议。     

基于NGN技术的石化企业通信专网设计与实现

国内大型石化企业的信息网络系统往往包括企业网络系统、通信专网系统、社区宽带系统等多套独立的子系统。随着企业信息网络系统变得日益庞大而复杂,出现了设备老化、业务扩展难、数据无法共享、管理效率低等问题,急需对企业通信专网进行升级改造。本文针对某石化企业的通信专网现状,采用下一代网络(Next Generation Network,NGN)体系对通信专网进行了规划设计,并利用NGN体系中软交换核心技术进行建设和实现。整个系统分二期建设,在一期建设中建立软交换核心层网络,将现有用户逐步转换为软交换用户,实现程控交换机的退网。二期建设则在数据中心进行软交换第二核心节点的建设,实现与企业网整合。采用3层核心交换机组成软交换承载网核心层,进而实现软交换组网的建设。还对关键设备的承载能力进行核算,测算出软交换的用户数。实践表明基于NGN技术的通信专网系统打破了企业信息通信网络的孤岛格局,优化了网络资源配置,能够为企业带来较好的效益,也为类似企业提供了借鉴经验。     

基于软交换技术的远程教育电视系统的实现

提出了一种在单向有线数字电视HFC网和IP网上采用软交换技术、IP技术的远程教育方法，并将该方法加以实现。通过软交换体系使HFC网和IP网能够互通互用,较好地解决了广播电视HFC网、IP网分别开展远程教育所带来的网络拥塞、时延、QoS保证及双向互动等不足，为远程实时教学提供了一种可行方案。     

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。