离散非线性解耦控制算法及其在长形电阻炉中的应用

本文针对一类离散非线性系统，提出了一种输入／输出解耦线性化控制算法。并针对一工业无纺针热处理长形电阻炉，通过系统辩识的方法得到离散非线住系统模型，并将所开发的非线性解耦控制算法应用于该电阻炉。工业应用结果表明，利用非线性控制算法可以较好地解决工业电加热炉的控制。     

电加热炉系统预测函数PID控制算法的研究

由于电加热炉系统具有大时滞、时变性、非线性等特点,提出了一种新型预测函数PID控制算法.该算法将PID控制算法和预测函数控制算法结合起来,通过预测被控对象的未来输出值,得到一个新的优化目标函数,实时优化控制参数,得到控制量的解析解.仿真结果表明,与常规PID控制和预测函数PID串级控制相比,所设计的控制器满足系统对快速性和稳态精度的要求,系统具有较强的抗干扰性和鲁棒性,能够实现对电加热炉系统的有效控制.     

工业电加热炉非线性模型的辨识

本文针对一工业电加热炉提出一种离散仿射非线性系统的模型结构，并研究了这类模型的辨识方法。根据工业电加热炉的实际数据辨识得到了系统模型。实际考核结果表明辨识模型具有满意的数据拟合效果。     

基于BP神经网络PID的控制系统研究

该文选取在工业上具有广泛应用的电加热炉为对象。电加热炉系统是一个双输入双输出系统,有耦合,相互影响,相互干扰。针对控制对象强耦合的特点,设计了基于BP神经网络的参数PID控制算法,采用前馈补偿方法实现解耦,通过仿真研究,结果表明该方案控制系统的调节品质比传统的PID控制水平有了明显的提高。     

基于BP神经网络PID的控制系统研究

该文选取在工业上具有广泛应用的电加热炉为对象。电加热炉系统是一个双输入双输出系统,有耦合,相互影响,相互干扰。针对控制对象强耦合的特点,设计了基于BP神经网络的参数PID控制算法,采用前馈补偿方法实现解耦,通过仿真研究,结果表明该方案控制系统的调节品质比传统的PID控制水平有了明显的提高。     

计算机解耦控制系统实验装置

过程控制是自动化专业的一个重要专业方向．实践性很强，针对工业过程控制中多变量耦合系统．我们开发了一套解耦控制系统实验装置。本文扼要地阐述了自行研制的电加热炉温度计算机解耦控制系统实验装置．包括硬件配置、实验软件平台以及解耦控制算法。通过这套装置．学生可以做多输入多输出系统建模、阶跃响应曲线、数字PID控制、解耦控制以及各种控制算法仿真等实验．还可用于模拟工业生产过程进行控制算法仿真实验。     

具有二次型性能指标的简单自适应控制算法及其应用

在简单自适应控制算法结构中引入二次型性能指标,使控制律计算简单且可用于具有一定非线性的被控对象,并给出了控制算法参数选择的一般性原则。对双输入双输出电加热炉进行实时控制,取得了满意的结果。     

多温区电加热炉的系统模型辨识及仿真试验

多温区电加热炉建模是系统辨识领域中的一个典型问题,电加热炉控制过程往往表现出非线性、大迟延和耦合性等特点,难以用传统方法建立精确的数学模型.针对此问题,提出了一种加权最小二乘递推辨识算法,并应用到钟罩式加压烧结炉的建模试验中,通过试验验证了该方法能够获得较好的数学模型.此方法对多变量工业过程的控制方法研究、多变量系统的控制理论研究有着广泛的理论和实际意义.     

基于最优预测的神经元模糊自整定PID控制

针对工业过程中普遍存在的时滞、非线性、对象参数时变等特性,提出了一种基于最优预测的神经元模糊自整定PID控制算法。该算法利用最优预测克服时滞,利用神经元学习功能和模糊控制调节神经元增益克服系统的非线性和时变问题。仿真结果表明,该控制算法鲁棒性强、响应速度快,具有工业控制应用价值。     

水平辊道式玻璃钢化炉及其温度控制系统研究

首先分析水平辊道式玻璃钢化生产线的构成与工艺流程,然后进行控制系统结构设计.钢化玻璃品质控制的关键在于温度控制,因为钢化玻璃电加热炉是一个非线性、时变、大滞后系统.在数学建模的基础上,将增益自适应补偿Smith 算法运用于电加热炉温度控制,取得比传统PID控制更优的控制效果.     

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。