结合SCE法的粒子群优化QoS路由算法

QoS(QualityofService)路由问题是一个非线性的组合优化问题,理论上已证明了该问题是NP完全问题。粒子群优化算法是一种基于群智能演化计算技术,PSO在求解连续性优化问题上得到了较好的应用,而把PSO算法用于求解路由算法等离散性问题还比较少见,同时,PSO算法在收敛过程中还存在随机性,某些情况下会出现停滞现象。为此本文提出了一种结合SCE(shuffledcomplexevolution)法的粒子群优化方法用于求解QoS路由问题。该算法通过引入插入算子,删除算子,算子系列和基本算子序列等概念,对基本的粒子群优化算法进行改进;通过采用SCE法,使算法跳出局部最优解的限制。仿真结果显示,该算法取得了满意的效果,在寻优速度上优于遗传算法,也提高了算法收敛到最优解的能力。     

基于粒子群优化的QoS组播路由算法

QoS(QualityofService)组播路由问题是一个非线性的组合优化问题,已证明了该问题是NP完全问题。论文将基于群智能演化计算技术的粒子群优化算法用于此类问题的求解。算法引入了交换,插入,删除,增量等操作算子和操作算子序列等概念,并在此基础上对基本的粒子群优化算法进行改进,使之适合于QoS组播路由的求解,仿真结果显示,该算法取得了满意的效果,在寻优速度上优于遗传算法。     

量子粒子群算法求解QoS组播路由

QoS组播路由问题是一个非线性的组合优化问题,已证明了该问题是NP完全问题。将量子粒子群算法用于此类问题的求解。并在此基础上对基本的量子粒子群算法进行改进,针对群体智能和约束优化问题的特点,提出了一种在每次迭代中有选择地保留一定数量不可行解的方法,并把它结合到量子粒子群优化（QDPSO）算法中。该算法可以利用保留下来的不可行解来帮助搜索靠近边界的最优解,同时又可以避免罚因子的选择问题,使之更适合于QoS组播路由的求解。仿真实验结果显示,该算法能快速搜索并收敛到全局（近似）最优解,且随着网络规模的增大算法保持了良好的特性,在寻优速度上与解的质量上优于其他粒子群算法与基本的量子粒子群算法。     

基于PSO和变异模拟退火的QoS单播路由算法

为了研发更高性能的QoS单播路由算法,提出变异退火粒子群优化（MSAPSO）算法。MSAPSO算法中使用一种新的。算子,将粒子群优化（PSO）的迭代公式简化成一个公式。通过设计变异退火算子,将遗传算法的变异操作和模拟退火的Meuopofis概率接受准则融入PSO,以改善粒子群的多样性和算法的收敛性。仿真结果表明MSAPSO在搜索成功率和收敛性上优于纯PSO算法和蚁群算法。     

异步粒子群优化算法在QoS组播路由中的应用

QoS组播路由问题是一个非线性的组合优化问题,已证明了该问题是NP完全问题。为适应下一代IP网络对实时信息传输的要求,在异步模式粒子群优化算法基础上,给出包含延迟、延迟抖动、带宽、丢包率和最小花费5个约束条件在内的QoS组播路由算法。该算法首先给出数学模型,设计适应度函数,再给出受限的网络模型,通过粒子群优化(PSO)算法最大化适应度函数来求解最优Steiner树。算法仿真实验结果表明:与遗传算法和同步模式的粒子群优化算法相比,该算法有较好的收敛速度和寻优效果。     

基于微粒群算法的QoS组播路由算法

文章研究了带宽、延时、延时抖动约束最小代价的QoS组播路由问题,提出了一种基于微粒群优化(PSO)算法[2,5]来设计路由优化算法。该算法采用一种新的整数编码方案,将路由优化问题转化成准连续优化问题,并采用罚函数处理约束条件。给出了应用微粒群优化算法求解QoS组播路由问题的算例,并与遗传算法和改进后的遗传算法进行了比较。计算机仿真实验证明,该算法可以更有效地求得QoS组播路由问题的优化解,可靠性高。     

含维变异算子的量子粒子群算法

针对粒子群优化(PSO)算法搜索空间有限,容易陷入局部最优点的缺陷,提出一种新的量子粒子群优化算法--含维变异算子的量子粒子群算法(QPSODMO).计算每一维的收敛度,以一定的概率对收敛度最小的维进行变异,让所有粒子在该维上的位置重新均匀分布在可行区域上.对测试函数所做的对比实验表明,所提出的QPSODMO增强了全局搜索能力,克服了PSO算法易于收敛到局部最优的缺点,也优于原始的量子粒子群算法.     

多向学习自适应的粒子群算法

粒子群优化算法（PSO）是一种群体智能算法,通过粒子间的竞争和协作以实现在复杂搜索空间中寻找全局最优点。但基本PSO算法存在进化后期收敛速度慢、易陷入局部最优点的缺点,提出了一种多向学习型的粒子群优化算法,该算法中粒子通过同时追随自己找到的最优解、随机的其他粒子同维度的最优解和整个群的最优解来完成速度更新,通过判别区域边界来完成位置优化更新,通过对全局最优位置进行小范围扰动,以增强算法跳出局部最优的能力。对几种典型函数的测试结果表明：改进后的粒子群算法明显改善了全局搜索能力,并且能够有效避免早熟收敛问题。算法使高维优化问题中全局最优解相对搜索空间位置的鲁棒性得到了明显提高,适合于求解同类问题,计算结果能满足实际工程的要求。     

基于混合的GA-PSO神经网络算法

粒子群优化(PSO)算法是一类随机全局优化的技术,它通过粒子间的相互作用发现复杂搜索空间中的最优区域。提出了一种基于GA和PSO混合的算法(GA-PSO)用于神经网络训练。算法在产生下一代时,结合了交叉、变异算子和粒子群算法中的速度—位移公式,充分利用了遗传算法的全局寻优和粒子群算法收敛速度快的优点。经GA-PSO训练的神经网络应用于三元奇偶问题和IRIS模式分类问题,与BP、GA和PSO算法相比,该算法在提高训练误差精度的同时加快收敛速度,并能有效避免早熟收敛。仿真结果表明,GA-PSO算法是有效的神经网络训练算法。     

基于量子粒子群算法的时延受限组播路由问题研究

对具有延时约束的最小代价的组播路由问题进行研究,提出一种收敛速度快、全局性能好、不易陷入局部最优的智能迭代算法-量子粒子群算法来实现该问题的求解.该算法采用整数编码方式,将路由优化问题转化成准连续优化,并采用惩罚函数处理约束条件.最后通过具体算例,对该算法进行了仿真验证,结果表明,在求解延时约束的组播路由问题时,量子粒子群算法要优于遗传算法、克隆算法,从而验证了该算法的可行性和有效性.     

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.     

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。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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.     

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     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.