基于Agent的MCU负载均衡方法

针对视频会议系统中多点控制单元(MCU)负载均衡问题,提出一种基于Agent的MCU负载均衡方法和一种具有较低MCU级联的组优先负载分配算法。该方法通过负载Agent和负载均衡Agent收集区域内MCU的动态负载信息并执行负载均衡操作,使MCU的负载得到平衡。实验结果证明该方法与FRFA算法相比,传输时延约减少8%。     

Geo-Agents系统中的负载控制策略

Geo-Agents是一个基于Agent的分布式GIS系统．首先分析Geo-Agents系统中的负载问题：主机负载和网络负载．主机负载指的是运行在该主机上的Agent数目；而网络负载则由Agent之间的通信和地理空间数据的传输组成．主机负载和网络负载是相互关联的．在Geo-Agents系统中，由于地理空间数据的数据量非常巨大，因此减少网络负载是首位的问题，只有在网络负载一致时才考虑均衡主机负载．针对Geo-Agents系统中负载情况，给出了两个负载控制策略：Agent调度策略和对等主机策略，并对Geo-Agents系统的主机负载和网络负载进行控制．     

基于哈希表的分布式移动Agent的寻址机制

在基于移动Agent的计算环境中,由于Agent的位置可能经常变动,因此,当Agent位置改变时,其它Agent如何找到他,并与他通信就成了一个问题。过去,通过一个树型的名称服务器,像DNS的方式一样来解决这个问题,但是这可能会导致造成服务器的负载过大,而成为性能瓶颈,该文提出了一种负载均衡的寻址机制,他大大减少了服务器的负载。     

变电站自动化调度的远程监控通信系统的改进研究

对变电站自动化调度的远程监控通信系统进行研究，提出了一种基于改进后KSP算法的电力骨干通信负载均衡路由优化方法，以保证电力骨干通信网上的变电站自动化调度的远程监控通信系统业务运行。首先，提出了目前电力骨干通信存在的问题与本研究需要优化的目标；其次，对电力骨干通信网负载均衡路由优化方法进行了设计，同时对电力骨干通信负载均衡最优化模型中的约束条件进行了设置，并改进了传统KSP算法；然后研究了如何实现电力骨干通信网负载均衡路由优化；最后，对经过优化的电力骨干通信网负载均衡路由的性能与负载均衡有效性进行验证。结果表明：经过改进后的KSP算法能够用于电力骨干通信网负载均衡路由的优化，且具有较高的有效性，使负载均衡路由能够快速寻找到最优传输路径。     

一种动态负载均衡的P2P应用层组播方案

基于结构化的P2P基础设施,给出一种动态负载均衡的应用层组播方案--DLBMS.利用Tapestry协议的路由和定位机制,设计了延迟优化的组播转发树结构,采用根节点复制的方法生成多棵不相交的组播转发树,根据负载的变化动态调节组播转发树数目以实现负载均衡和降低源到组成员节点的端到端延迟.通过模拟实验说明了此方案在平均控制负载和端到端平均延迟方面的有效性.     

基于多Agent技术的多运营终端自适应负载均衡算法

当前网络用户数量、多运营终端节点数量增长趋势明显,导致网络计算资源很难达到均衡状态。提出基于多Agent技术的多运营终端自适应负载均衡算法。定义多运营终端负载状态,采集多运营终端负载信息,并量化处理负载信息。以此为基础,搭建Agent负载均衡结构,引入多Agent技术,结合多运营终端节点工作特点,构建网络资源模型,设计多运营终端自适应负载均衡算法。实验结果证明：与对比算法相比,应用提出算法获得的多运营终端的吞吐量较大,平均响应延迟较短,负载均衡度较高,证实了提出算法具有理想的负载均衡效果。     

基于ENP2611开发板的负载均衡系统设计和实现

本文就如何在高速网络中实现负载均衡进行探讨，并给出了千兆负载均衡器在ENP2611开发极上的设计和实现。采用了Agent的架构和动态反馈技术，在千兆网络中实现了负载的快速加权分配。     

一种基于分布式网络编码的共享树光组播算法

为了减少传统组播共享树算法的网络资源消耗和均衡链路负载,提出了一种基于分布式网络编码的共享树光组播算法。此算法在最大限度地增加光链路共享的情况下,对多点到多点的组播建立具有网络编码功能的共享树进行信息传输,且对具有网络编码的共享树只分配两个波长,有别于传统组播为每个会话分配一个波长,从而减少了波长资源消耗。仿真结果表明,新的基于分布式网络编码的共享树光组播算法相比传统共享组播树方法能有效达到均衡网络负载和减少波长资源消耗的目的。     

基于信息熵多种群遗传算法的组播路由

针对网络信息不确定性和链路负载不均匀所造成的网络拥塞,提出基于信息熵的组播路由算法。该遗传算法从最小代价树开始,在多种群中不断选择信息熵较大的种群,以求得满足延时要求且路径负载较小的组播树。结果表明,该算法性能快速、有效地构造最小时延组播树,且保证网络负载均衡分布。     

基于Agent的负载均衡框架应用研究

文章通过对现有负载均衡系统的分析,针对现有系统缺乏自主调节能力的不足,提出了一套将现代经济理论通过Agent技术运用到负载均衡和资源分配中的应用框架模型。     

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。