检索结果-内蒙古大学图书馆

Multi-objective Bayesian Artificial Immune System: Empirical Evaluation and Comparative Analyses

Journal of Mathematical Modelling and Algorithms 2009年第2期8卷 151-173页

作者： Castro, Pablo A. D. Von Zuben, Fernando J. Laboratory of Bioinformatics and Bioinspired Computing - LBiC Department of Computer Engineering and Industrial Automation - DCA School of Electrical and Computer Engineering - FEEC University of Campinas - UNICAMP Campinas Brazil

Recently, we have proposed a Multi-Objective Bayesian Artificial Immune System (MOBAIS) to deal effectively with building blocks (high-quality partial solutions coded in the solution vector) in combinatorial multi-objective problems. By replacing the mutation and cloning operators with a probabilistic model, more specifically a Bayesian network representing the joint distribution of promising solutions, MOBAIS takes into account the relationships among the variables of the problem, avoiding the disruption of already obtained high-quality partial solutions. The preliminary results have indicated that our proposal is able to properly build the Pareto front. Motivated by this scenario, this paper better formalizes the proposal and investigates its usefulness on more challenging problems. In addition, an important enhancement regarding the Bayesian network learning was incorporated into the algorithm in order to speed up its execution. To conclude, we compare MOBAIS with state-of-the-art algorithms taking into account quantitative aspects of the Pareto front found by the algorithms. MOBAIS outperforms the contenders in terms of the quality of the obtained solutions and requires an amount of computational resource inferior or compatible with the contenders.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Interior permanent-magnet motor for ship propulsion, design and testing

Interior permanent-magnet motor for ship propulsion, design ...

引用

2009 13th European Conference on Power Electronics and Applications, EPE '09

作者： Ružojčić, Branimir Žarko, Damir Ban, Drago TEMA d.o.o. Voltića 14/p HR-52100 Pula Croatia University of Zagreb Faculty of Electrical Engineering and Computing Department of Electrical Machines Drives and Automation Unska 3 HR-10000 Zagreb Croatia

ISBN: (纸本)9781424444328

The main design features and the results of tests carried out on a prototype of a 750 kW interior permanent-magnet (IPM) motor for ship propulsion are presented. The principal reasons for choosing an IPM motor design over other available types of permanent-magnet (PM) motors for ship propulsion have been discussed in detail. The test results indicate that the motor parameters and its performance confirm the predictions made in the design stage.

关键词： Ship propulsion

来源：评论

学校读者我要写书评

暂无评论

On the complexity of explicit MPC laws 10

On the complexity of explicit MPC laws

引用

2009 10th European Control Conference, ECC 2009

作者： Borrelli, Francesco Baotic, Mato Pekar, Jaroslav Stewart, Greg Department of Mechanical Engineering University of California Berkeley94720-1740 United States Faculty of Electrical Engineering and Computing University of Zagreb Unska 3 Zagreb10000 Croatia Honeywell Prague Laboratory Prague Czech Republic Honeywell Automation and Control Solutions North Vancouver Canada

ISBN: (纸本)9783952417393

Finite-time optimal control problems with quadratic performance index for linear systems with linear constraints can be transformed into Quadratic Programs (QPs). Model Predictive Control requires the online solution of such QPs. This can be obtained by using a QP solver or evaluating the associated explicit solution. Objective of this note is to shed some light on the complexity of the two approaches. © 2009 EUCA.

关键词： Model predictive control

来源：评论

学校读者我要写书评

暂无评论

Performance Analysis of the LPA-RICI Denoising Method

Performance Analysis of the LPA-RICI Denoising Method

引用

International Symposium on Image and Signal Processing and Analysis

作者： Jonatan Lerga Victor Sucic Damir Sersic Department of automation and electronics Faculty of Engineering University of Rijeka Department of Electronic Systems and Information Processing Faculty of Electrical Engineering and Computing University of Zagreb

ISBN: (纸本)9781424456499

In this paper we have analyzed the performance of the recently introduced LPA-RICI signal denoising method. The RICI method is an extension of the classical denoising method based on the intersection of confidence intervals (ICI) rule, whereby an additional criterion, the ratio of intersection of confidence intervals, has been included. The performance of the RICI method is studied on a several test signals for an extensive range of noise distributions and SNR values. It is shown that for all types of noise and all considered SNR values, the RICI method when compared to the ICI method significantly reduces the estimation mean squared error.

关键词： Performance analysis Noise reduction Signal to noise ratio Additive white noise Testing Estimation error Gaussian noise Filters Signal processing AWGN

来源：评论

学校读者我要写书评

暂无评论

Output regulation for output feedback systems with an uncertain exosystem

Output regulation for output feedback systems with an uncert...

引用

IEEE Conference on Decision and Control

作者： Dabo Xu Jie Huang Applied Control and Computing Laboratory Department of Mechanical and Automation EngineeringComputing Laboratory Department of Mechanical and Automation Engineering Chinese University of Hong Kong New Territories Hong Kong China

ISBN: (纸本)9781424438716

This paper studies the global robust output regulation problem for a class of output feedback systems subject to an uncertain exosystem by using output feedback control. An adaptive control technique is used to handle the unknown parameter vector in the exosystem. It is shown that this unknown parameter vector can be exactly estimated asymptotically if the controller incorporates a minimal internal model. The effectiveness of our approach has been illustrated by an asymptotic tracking problem associated with a generalized fourth-order Lorenz system.

关键词： Output feedback Control systems Adaptive control Nonlinear systems Robustness Robust control Nonlinear control systems Time varying systems Uncertainty Eigenvalues and eigenfunctions

来源：评论

学校读者我要写书评

暂无评论

Model Predictive Control Applied into Time Delay Capsubot System

Model Predictive Control Applied into Time Delay Capsubot Sy...

引用

International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC

作者： Wei Chen Min Fang Hongnian Yu Department of Automation HeFei University of Technology Hefei China Faculty of Computing Engineering and Technology Staffordshire University Stafford UK

In this paper, a model predictive controller for time delay capsubot system is presented. Linearized dynamics is used to predictive future system behavior and a control law is derived from a quadratic cost function penalizing the system tracking error and the control effort. It is noted that model predictive control has advantages over state feedback law because of consideration of constraints on inputs or state vectors. Examples are given to illustrate the effectiveness of the approach. Some ideas for future work are also discussed.

关键词： Predictive models Predictive control Delay effects Control systems Communication system control Automatic control Equations Propulsion Communication networks Optimal control

来源：评论

学校读者我要写书评

暂无评论

H∞ norm computation for descriptor symmetric systems

H∞ norm computation for descriptor symmetric systems

引用

Asian Control Conference

作者： Guoshan Zhang Shuping Wang Wanquan Liu Zhiqiang Zuo School of Electrical Engineering and Automation Tianjin University TJU Tianjin China Department of Computing Curtin University of Technology WA Australia

This paper deals with the problem of H infin norm computation for general symmetric systems and descriptor symmetric systems. The computation of H infin norm for state-space symmetric systems is extended to descriptor symmetric systems. An explicit expression is given based on the bound real lemma (BRL), and the generalized bound real lemma (GBRL). The results have obvious computational advantages, especially for large scale descriptor symmetric systems. Additionally, two numerical examples are presented to demonstrate the feasibility and effectiveness of the results.

关键词： Symmetric matrices Control systems Output feedback Large-scale systems Power engineering and energy Viscosity Elasticity Chemicals Control system analysis Control system synthesis

来源：评论

学校读者我要写书评

暂无评论

Robust H∞ guaranteed cost control for descriptor systems with time-delay and parameter-uncertainty

Robust H∞ guaranteed cost control for descriptor systems wi...

引用

Asian Control Conference

作者： Lei Liu Guoshan Zhang Zhiqiang Zuo Wanquan Liu School of Electrical Engineering and Automation Tianjin University TJU Tianjin China Department of Computing Curtin University of Technology WA Australia

The problem of robust Hinfin guaranteed control for the descriptor systems with time-delay and parameter uncertainty is considered. A sufficient condition for the existence of non-fragile Hinfin controller is presented in terms of linear matrix inequality such that the resulting closed-loop system is robustly stable and guarantees Hinfin performance index. It is proved that the condition also satisfies the requirement of guaranteed cost control and an upper bound on the given cost function can be given. Furthermore, a design method of the optimal Hinfin guaranteed cost control is given against the constant initial value. If the Hinfin performance index and the upper bound are optimized by a series of proportion, the relationship of them can be derived. A numerical example is provided to demonstrate the effectiveness and feasibility of the proposed results.

关键词： Robust control Control systems Cost function Performance analysis Upper bound Uncertain systems Sufficient conditions Linear matrix inequalities Design methodology Optimal control

来源：评论

学校读者我要写书评

暂无评论

Output regulation design for a class of nonlinear systems with an unknown control direction

Output regulation design for a class of nonlinear systems wi...

引用

Asian Control Conference

作者： Dabo Xu Jie Huang Applied Control and Computing Laboratory Department of Mechanical and Automation Engineering Chinese University of Hong Kong New Territories Hong Kong China

This paper presents the solution of the global robust output regulation problem for a class of nonlinear systems with relative degree one without knowing the control direction. The result is also applied to an asympto... 详细信息

ISBN: (纸本)9781424454402

关键词： Nonlinear systems Nonlinear control systems Control systems Robustness Output feedback Robust control Error correction Time varying systems Eigenvalues and eigenfunctions Signal design

来源：评论

学校读者我要写书评

暂无评论

Adaptive synchronization of Chua's circuit with an uncertain harmonic system

Adaptive synchronization of Chua's circuit with an uncertain...

引用

SICE Annual Conference

作者： Lu Liu Jie Huang Department of Information Physics and Computing University of Tokyo Tokyo Japan Department of Mechanical and Automation Engineering Chinese University of Hong Kong New Territories Hong Kong China

Motivated by an adaptive synchronization problem for the Chua's circuit with an uncertain harmonic system, we first consider an adaptive stabilization problem for a class of uncertain nonlinear systems with both dynamic and static uncertainties. A sufficient condition on the convergence of the estimated parameter to true parameter is also given. Then we show that the synchronization problem for the Chua's circuit and the uncertain harmonic system can be converted into the adaptive stabilization problem under consideration. Finally, an adaptive feedback control law is designed such that, the output of the Chua's circuit can asymptotically synchronize, in the presence of large parameter variations, with a sine function with arbitrary unknown frequency, amplitude, and phase angles.

关键词： Circuits Frequency synchronization Nonlinear systems Nonlinear dynamical systems Uncertainty Sufficient conditions Convergence Parameter estimation Programmable control Adaptive control

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：