基于模糊控制理论的无模型自适应控制技术

美国通控集团公司于１９９８年１月推出了基于无模型自适应（ＭＦＡ）控制技术的产品,但却小心保护着ＭＦＡ控制技术这一机密。本文根据美国通控集团公司的介绍,提出了ＭＦＡ控制器的特点,并用模糊控制理论对单输入输出（ＳＩＳＯ）系统和多输入多输出（ＭＩＭＯ）系统的ＭＦＡ控制技术进行了探讨。     

扁球壳的边界元分析的一种简便方法

扁球壳的边界元分析的一种简便方法龙述尧，蒯行成，李家宝，陈军（湖南大学）ＡＣＯＮＣＩＳＥＭＥＴＨＯＤＯＦＢＯＵＮＤＡＲＹＥＬＥＭＥＮＴＡＮＡＬＹＳＩＳＦＯＲＳＨＡＬＬＯＷＳＰＨＥＲＩＣＡＬＳＨＥＬＬＳ￥ＬｏｎｇＳｈｕ－ｙａｏ；ＫｕａｉＸｉｎｇ－ｃｈｅ...     

CPU术语解释

３ＤＮｏｗ！：（３Ｄ ｎｏ ｗａｉｔｉｎｇ）ＡＭＤ公司开发的 ＳＩＭＤ指令集,可以增强浮点和多媒体运算的速度,它的指令数为２１条。 ＡＬＵ：（ＡｒｉｔｈｍｅｔｉｃＬｏｎｇｉｃＵｎｉｔ,算术逻辑单元）在处理器之中用于计算的那一部分,与其同级的有数据传输单元和分支单元。 ＣＭＯＳ：（ＣｏｍｐｌｅｍｅｎｔｒｙＭｅｔａｌＯｘｉｄｅＳｅｍｉｃｏｎｄｕｃｔｏｒ,互补金属氧化物半导体）它是一类特殊的芯片,最常见的用途是主板的ＢＩＯＳ（ＢａｓｉｃＩｎｐｕｔ／Ｏｕｔｐｕｔ Ｓｙｓｔｅｍ,基本输入／输出系统）。 ＣＯＢ：…     

针对PLD芯片的大型MI/SO组合逻辑ABEL编程文件的自动生成

可编程逻辑器件的应用使逻辑电路的设计与修改更加灵活，实现起来更加方便．但使用现有的可编程逻辑器件计算机辅助设计软件需要一定的专业知识，对于一般用户有一定的困难；而系统内所提供的逻辑自动划分功能算法对于有些特殊应用还会遇到一些难以解决的问题．鉴于此，作者开发了针对指定ＰＬＤ芯片的自动生成多输入单输出（ＭＩ／ＳＯ）组合逻辑的ＡＢＥＬ编程文件的软件．本系统由于仅利用遍历操作实现逻辑划分，按存储器访问次数计算，该算法的计算复杂度仅为Ｏ（ｎ＋ｋｎ），不存在组合爆炸问题，它能够将大规模的多输入单输出组合逻辑函数自动分解，自动生成ＡＢＥＬ语言的设计文件，并能够自动给出芯片之间的连接方式．     

容错计算机技术

一、ＰＣ机容错技术思想简介：ＴｅｘａｓＭｉｃｒｏ公司推出的容错系统体系结构ＦＡＵＬＴＴＯＬＥＲＡＮＴＳＹＳＴＥＭＡＲＣＨＩＴＥＣＴＵＲＥ（ＦＴＳＡ～（ＴＭ））首次在基于ＤＯＳ的ＰＣ机上，全面提供了最大的数据保护性和较高的系统可用性及容错能力。容错能力的实现是针对ＤＯＳ操作系统和工业标准结构（ＩＳＡ）本身固有的薄弱点，在基本输入／输出系统（ＢＩＯＳ）一级上利用综合控制的思想着手解决的。在我们开始讨论容错问题之前，先对“容错”这一术语给予定义。容错是指一个系统在运行中其任何一个子系统发生故障时，系统…     

基于MATLAB（SIMULINK）的模糊控制系统计算机仿真

将ＭＡＴＬＡＢ的ＦＵＺＺＹ ＴＯＯＬＢＯＸ中的模糊推理系统（Ｆｕｚｚｙ Ｉｎｔｅｒｅｎｃｅ Ｓｙｓｔｅｍ）编辑器与ＳＩＭＵＬＩＮＫ有机结合起来,充分利用它们各自的优势,方便地实现了模糊控制系统（ＦＣＳ）的计算机仿真。从而克服了对复杂控制律无法直接应用ＳＩＭＵＬＩＮＫ进行仿真的缺点,了ＳＩＭＵＬＩＮＫ的应用范围。     

多总线的系统扩展在计算机系统中的应用

本文分析了系统在多总线（ＭＵＬＴＩＢＵＳ）下的扩展，局部内存扩展（ＩＬＢＸ）总线、多通道Ｉ／Ｏ（ＭＵＬＴＩＣＨＡＮＮＥＬＩ／Ｏ）总线、系统扩展Ｉ／Ｏ（ＩＳＢＸ Ｉ／Ｏ）总线在多总线中的作用和结构。最后讨论了系统运用ＭＵＬＴＩＢＵＳ的情况下，板上ＣＰＵ和ＭＵＬＴＩＢＵＳ接口是如何占用双端总线，对双端口总线，对双端口ＲＡＭ进行资源共享的。     

模糊CMAC神经网络用于MIMO非线性系统的反馈线性化

针对一类多输入多输出（ＭＩＭＯ）连续时间非线性系统,应用模糊ＣＭＡＣ神经网络,给出一种状态反馈控制器,用于使状态反馈可线笥化的未知的非线性动态系统儿得要求的患 很弱的假设条件下,应用李雅普诺夫稳定性理论严格地证明了闭环系统内的所有信号为一致最终有界（ＵＵＢ）。     

多个未知时延的MISO系统的递推辨识

对于未知时延的多输入单输出（ＭＩＳＯ）系统,借助分离性原理,推导出迭代的可分离的非线性最小二乘（ＳＮＬＳ）辨识方法．为降低收敛于局部最小的可能性,利用全局优化理论,推导了全局可分离的非线性最小二乘（ＧＳＮＬＳ）辨识方法;为消除强观测噪声所引起的参数估计的偏差,将ＧＳＮＬＳ方法调整为一新颖的全局可分离的非线性多新息递推最小二乘（ＧＳＮＭＩＲＬＳ）辨识方法,仿真实验验证了算法的有效性．     

一种基于ＳＩＭＯ系统的递推盲辨识算法

传统的盲辨识算潮基于通道输入的统计模型和通道输出,然而在对输入的统计特性进行准确估计时需要大量的数据,为了避免这种缺点,本文提出了一种单输入多输（SIMO)线性时不变有限单位冲击响应（ＦＩＲ）系统的盲辨识最小二乘算法,利用递推最小二乘算法求解这类算法中的ＸＬＴＫ方程,大大降低了算法对计算存储量的要求,在盲辨识的基础上,利用多项式互质的一个判别定理,通过解卷积求出ＳＩＭＯ－ＦＩＲ系统输入,最后通过实验验证了算法的有效性。     

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。     

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.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.