全IP移动网络中的动态资源预留机制与QoS研究

全IP移动网络中的Qos是最近的研究热点之一，其中资源预留协议（Resource Reser Vation Protocol，RSVP）是一个关键技术。为了保证切换时的QoS，需要进行资源预留。针对RSVP不适应移动环境的缺点，文中在全IP移动网络的接入网的微移动域中，提出一种动态资源预留的QOS解决方案，实现微移动协议和RSVP协议之间的互操作。当有多个移动主机需要进行预留时，需要对它们进行优先级排序。文中提出了一种在全IP移动网络中基于信令预测优先级排队的动态排序算法．以有效地对多个移动主机进行资源预留。仿真结果表明文中提出的算法的有效性。     

简单资源预留协议及其在多播通信中的应用

由于传统的RSVP实现起来比较复杂，尤其是在初始建立阶段，因此需要一种简单易行的资源预留协议来克服其弱点。该文以RSVP为基础，讨论并分析了一种简单的资源预留协议SRSVP。由于SRSVP对动态和可重组的多播环境下的资源预留是可扩展的，因此将其运用到多播通信中。     

HMRSVP：层次化移动资源预留协议

本文提出了一种新的资源预留协议--移动资源预留协议（HMRSVP）。此协议建立在层次化移动IPv6（HMIPv6）框架与快速切换技术（FHMIPv6）基础之上。此协议能够让移动节点在进行子网间切换的时候获得更加平滑的切换性能。同时，本文还和现有基于HMIPv6和FHMIPv6的IntServ方案进行了性能比较分析。     

全IP移动网络中的动态资源预留机制与QoS研究

全IP移动网络中的QoS是最近的研究热点之一,其中资源预留协议(Resource ReserVation Protocol,RSVP)是一个关键技术。为了保证切换时的QoS,需要进行资源预留。针对RSVP不适应移动环境的缺点,文中在全IP移动网络的接入网的微移动域中,提出一种动态资源预留的QoS解决方案,实现微移动协议和RSVP协议之间的互操作。当有多个移动主机需要进行预留时,需要对它们进行优先级排序。文中提出了一种在全IP移动网络中基于信令预测优先级排队的动态排序算法,以有效地对多个移动主机进行资源预留。仿真结果表明文中提出的算法的有效性。     

适用于移动MPLS的改进RSVP协议研究

首先提出了一种改进的资源预留协议,能够保证基于分级移动的移动MPLS在切换过程中连续的集中服务质量。阐述了该改进协议的工作过程,证明了它能很好地适应移动MPLS,并能保证对移动MPLS在切换后的新路径进行快速的资源预留,从而保障业务的集中服务质量。最后,给出仿真结果并进行分析。     

移动Ad hoc网络与Internet互连的QoS保障机制

通过对IntServ／RSVP模型、DiffServ模型、基于IntServ网络的MRSVP的分析和比较,提出了一种新的MANET移动接入QoS保障框架,并在MANET移动接入方法和层次化算法的基础上提出了一种新的资源预留协议MMRSVP。该协议与MRSVP和RSVP相比,实现简单、操作方便,能很好地节省网络资源。     

全IP移动网络中基于信令预测优先级排队的动态资源预留排序

无线移动网络中的QoS是最近的研究热点之一,其中资源预留协议(ResourceReserVationProtocol,RSVP)是一个关键技术.为了提供更多的服务,蜂窝在变小,这样切换更频繁了.因此为了保证切换时的QoS,需要进行资源预留.当有多个移动主机需要进行预留时,就需要对它们进行优先级排序.本文提出一种在全IP移动网络中基于信令预测优先级排队的动态排序算法,以有效地对多个移动主机进行资源预留.仿真结果表明本文提出的算法既保证了快速切换,又实现了资源的有效预留,有效地分配了有限的资源.     

移动IPv6网络中的QoS

移动互联网是Internet发展的一种趋势.移动IPv6为移动互联网提供了保障.本文概述了移动IPv6技术,指出了现有的QoS体系结构在移动IPv6网络中存在的问题,并详细分析了预先资源预留、QoS对象选项、RSVP和移动IPv6协议结合等几种解决方案.     

基于HMIPv6的RSVP新方案

在移动IPv6环境中,IntServ/RSVP模型很难实现QoS保证。针对该问题提出一种新的资源预留方案,该方案建立在分层移动IPv6协议的基础上。分析移动节点在域内的资源预留机制,与MRSVP, HMRSVP进行性能比较,结果表明该方案具有较高性能。     

全IP移动网络基于弱动态资源预留的QoS保证机制

移动性管理和QoS保障机制是全IP移动网络中的两个关键技术。如何将二者结合起来，为用户提供可靠的有保障的服务，无疑是非常重要的问题。针对RSVP不适应移动环境的缺点，结合微移动协议，本文在全IP移动网络接入网的微移动域中，提出一种弱动态资源预留（WDRSVP）的QoS解决方案，实现微移动协议和RSVP协议之间的互操作。仿真证明，我们的方法能够有效地利用资源，能够更好地保证移动节点在切换时的通信服务质量。     

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     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。