基于混沌遗传算法的铜闪速熔炼过程操作模式智能优化系统

提出了一种铜闪速熔炼操作模式智能优化系统．该系统首先采用动态T-S递归模糊神经网络（Dynamic T-S Recurrent Fuzzy Neural Network, DTRFNN）对工艺参数进行软测量,再采用模式分解的方法对海量数据进行分解,最后对模式子集采用基于神经网络和混沌遗传算法的铜闪速熔炼操作模式智能优化方法进行优化．将该控制系统应用到铜闪速熔炼中,提高了铜闪速炉的生产效率．     

DNA免疫遗传算法及其应用

在研究T-S模糊RBF神经网络的基础上,提出了一种基于DNA生物机理和结构的免疫遗传算法,用于优化设计T-S模糊RBF神经网络的规则后件参数。该方法采用基于抗体浓度的更新策略调节机制,能有效地保持抗体的多样性,避免早熟收敛。应用于延迟焦化汽油干点的软测量建模,实例仿真结果表明DNA免疫遗传算法在T-S模糊神经网络系统的优化设计中是有效的,可获得较高精度的模型。     

改进粒子群优化Takagi-Sugeno模糊径向基函数神经网络的非线性系统建模

针对复杂非线性系统建模的难点问题,提出了一种基于改进的粒子群优化算法（PSO)优化的T-S模糊径向基函数（RBF）神经网络的新型系统建模算法。该算法将T-S模糊模型良好的可解释性及RBF神经网络的自学习能力相结合,构成T-S模糊RBF神经网络用于系统建模,并采用动态调整惯性权重的改进的PSO算法结合递推最小二乘算法实现网络参数的优化调整。首先,利用所提算法进行了非线性多维函数的逼近仿真,仿真结果均方差（MSE）为0.00017,绝对值误差不大于0.04,逼近精度较高;又将该算法用于建立动态流量软测量模型,并进行了相关的实验研究,动态流量测量结果平均绝对误差小于0.15L/min,相对误差为1.97%,基本满足测量要求,并优于已有算法。上述仿真及实验研究结果表明,所提算法对于复杂非线性系统具有较高的建模精度和良好的自适应性。     

基于改进T-S模糊神经网络的交通流量预测

在萤火虫优化算法和T-S模糊神经网络的基础上,提出了一种采用萤火虫算法优化的T-s模糊神经网络预测交通流量的算法。该算法利用萤火虫算法得到T_s模糊神经网络的最优参数配置,从而能发挥T-s模糊神经网络泛化的映射能力。将该算法应用到实测交通流中进行算法的有效性验证,并与传统的T-s模糊神经网络和遗传算法优化的T-S模糊神经网络进行比较,仿真结果表明该算法具有更高的预测准确性,从而证明了该算法在交通流量预测领域的可行性和有效性。     

基于T-S模型和PQGA的油田指标预测方法

针对油田开发指标预测问题,提出一种T-S模型建模方法.该方法采用量子遗传算法优化T-S参数.首先根据预测指标及影响因素建立模糊规则库,然后根据模糊规则库建立T-S预测模型,采用改进的量子遗传算法优化T-S参数.以油田开发指标中含水率预测为例,结果表明该方法是有效可行的.     

改进的粒子群算法优化TSFNN的交通流预测

为提高T-S模糊神经网络在交通流量预测的准确性,提出了一种改进的粒子群算法优化T-S 模糊神经网络预测交通流量的算法。该算法利用改进粒子群算法通过群体极值进行[t]分布变异,使算法跳出局部收敛,使用改进的粒子群算法优化T-S模糊神经网络,能够优化网络参数配置,进而提高网络的预测精度。利用优化后的T-S模糊神经网络对实测交通流量进行预测,实验仿真表明优化的T-S模糊神经网络可有效提高交通流量预测精度,减小预测误差。     

模糊神经网络的混沌优化算法设计

提出了一种基于混沌变量的多层模糊神经网络优化算法设计.离线优化部分采用混沌算法,将混沌变量引入到模糊神经网络结构和参数的优化搜索中,使整个网络处于动态混沌状态,根据性能指标在动态模糊神经网络中寻找较优的网络结构和参数.在线优化部分采用梯度下降法,把混沌搜索后得到的参数全局次优值作为梯度下降搜索的初始值,进一步调整模糊神经网络的参数,实现混沌粗搜索和梯度下降细搜索相结合的优化目的,能较快地找到全局最优解.最后对二阶延迟系统进行仿真,结果表明混沌优化方法控制精度高、超调小、响应快和鲁棒性强.     

基于自组织神经网络的非线性系统建模

针对基于T-S模糊模型的非线性系统建模问题,提出了一种基于自组织神经网络的新方法.在T-S模糊模型的建模中,目前常用的模糊C均值聚类算法存在迭代次数多,计算耗时的缺点.首先,利用竞争学习算法对输入空间进行聚类,基于此结果,借助于模糊C均值聚类算法进一步优化聚类结果,提取T-S模糊模型的规则前件隶属函数参数.然后,采用最小二乘法求得T-S模糊模型的规则后件参数,从而建立起非线性系统的T-S模糊模型.最后,仿真结果表明,该方法可以为模糊建模提供好的模型结构,并且有较高的计算效率和精度.     

基于混沌遗传算法的模糊CMAC控制

分析CMAC神经网络和模糊控制的特性,给出了一种能反映人脑认知的模糊性和连续性的模糊CMAC神经网络控制器,该控制器采用高斯函数作为模糊隶属函数,利用神经网络实现模糊推理并可对隶属函数进行实时调整,从而使其具有学习和自适应能力;针对BP算法易陷入局部极值点的缺点和简单遗传算法局部搜索能力差的不足,提出了一种混合学习算法,即首先利用混沌遗传算法全局搜索的特点来离线优化神经网络的参数,再利用BP算法较强的局部搜索能力对网络参数进行在线调整;仿真结果表明了该方法的可行性和有效性.     

基于局部线性聚类算法的模糊建模

提出了一种新的基于T-S模糊模型的建模方法，首先通过一种局部线性聚类算法，自适应确定模糊规则数目及初始T-S模型的前提和结论参数，建立相应的一阶T-S模糊神经网络．并用梯度下降和递推最小二乘混合算法训练网络参数，从而提高建模精度．最后，通过两个仿真实例验证了本文方法的有效性．     

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.     

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.