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Ordinal optimization of G/G/1/K polling systems with k-limited service discipline

Journal of Optimization Theory and Applications 2009年第2期140卷 213-231页

作者： Horng, S.-C. Lin, S.-Y. Department of Computer Science and Information Engineering Chaoyang University of Technology Taichung Taiwan Department of Electrical and Control Engineering National Chiao Tung University Hsinchu 300 1001 Ta Hsueh Road Taiwan

In this paper, we propose an ordinal optimization theory based algorithm to solve the optimization problem of G/G/1/K polling system with k-limited service discipline for a good enough solution using limited computation time. We assume that the arrival rates do not deteriorate visibly within a very short period. Our approach consists of two stages. In the first stage, we employ a typical genetic algorithm to select N=1024 roughly good solutions from the huge discrete solution space Ω using an offline trained artificial neural network as a surrogate model for fitness evaluation. The second stage consists of several substages to select estimated good enough solutions from the previous N, and the solution obtained in the last substage is the good enough solution that we seek. Using numerous tests, we demonstrate: (i) the computational efficiency of our algorithm in the aspect that we can apply our algorithm in real-time based on the arrival rate assumption;(ii) the superiority of the good enough solution, which achieves drastic objective value reduction in comparison with other existing service disciplines. We provide a performance analysis for our algorithm based on the derived models. The results show that the good enough solution that we obtained is among the best 3.31×10^-6% in the solution space with probability 0.99. © 2008 Springer science+Business Media, LLC.

关键词： K-Limited service disciplines Ordinal optimization Performance analysis Polling systems Stochastic simulation optimization

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Designing linear phase FIR filters with particle swarm optimization and harmony search

Designing linear phase FIR filters with particle swarm optim...

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作者： Shirvani, Abdolreza Khezri, Kaveh Razzazi, Farbod Lucas, Caro Computer Engineering Department Islamic Azad University of Tehran Science Research Branch Iran Biomedical Engineering Department Islamic Azad University of Tehran Science Research Branch Iran Electrical Engineering Department Islamic Azad University of Tehran Science Research Branch Iran Electrical and Computer Engineering Department Control and Intelligent Processing Center of Excellence University of Tehran Iran

ISBN: (纸本)9783642105456

In recent years, evolutionary methods have shown great success in solving many combinatorial optimization problems such as FIR (Finite Impulse Response) filter design. An ordinary method in FIR filter design problem is Parks-McClellan, which is both difficult to implement and computationally expensive. The goal of this paper is to design a near optimal linear phase FIR filter using two recent evolutionary approaches;Particle Swarm Optimization (PSO) and Harmony Search (HS). These methods are robust, easy to implement, and they would not trap in local optima due to their stochastic behavior. In addition, they have distinguishing features such as less variance error and smaller overshoots in both stop and pass bands. To prove these benefits, two case studies are presented and obtained results are compared with previous implementations. In both cases, better and reliable results are achieved. © 2009 Springer-Verlag Berlin Heidelberg.

关键词： FIR filters

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Optimization-based digital redesign of analogue controllers

Optimization-based digital redesign of analogue controllers

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： K.Yu.Polyakov E.N.Rosenwasser B.P.Lampe the Department of Automatic Control State University of Ocean Technology the Department of Computer Science and Electrical Engineering University of Rostock

A novel method is proposed for the digital redesign of analogue controllers with account for the closed-loop system performance in continuous *** method,which is based on a two-level optimization algorithm,makes it possible to place the closed-loop poles inside a specified region of the complex plane and provides for reduced-order *** effectiveness of the proposed technique is demonstrated by some well-known redesign examples.

关键词： Sampled-data systems Digital redesign Modal control Parametric design Optimization Numerical methods

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An improved MOCC with feedback control structure based on preference 09

An improved MOCC with feedback control structure based on pr...

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2009 World Summit on Genetic and Evolutionary Computation, 2009 GEC Summit - 1st ACM/SIGEVO Summit on Genetic and Evolutionary Computation, GEC'09

作者： Lihong, Xu Bingkun, Zhu Goodman, Erik D. ACM Department of Control Science and Engineering Tongji University Shanghai 200092 China Department of Control Science and Engineering Tongji University Shanghai 200092 China Departement of Electrical and Computer Engineering Michigan State University East Lansing MI 48824 United States

ISBN: (纸本)9781605583266

The optimal solution of multi-objective control problem (MOCP) isn't unique, so it is hard for traditional method to obtain these optimal solutions in one simulation process. Based on this background, Multi-Objective Compatible control (MOCC) algorithm was presented by Lihong Xu in [2]. MOCC is a compromise method, which hunts for suboptimal and feasible region as the control aim rather than precise optimal point. The controller of MOCC is optimized by GA in its interval, namely its controller lacks concrete controller structure. Due to the controller without concrete structure, the system model must be accurate and without input disturbance;however, it is impractical in practice. Besides, the control problem is different from the optimization. Different user has different preference and users' preference information plays a key role in control performance. In this paper, the feedback control law u L and users' preference information are incorporated into MOCC algorithm. An improved MOCC (IMOCC) algorithm is presented. The simulation result demonstrates its superiority and advantage over the MOCC algorithm. Copyright 2009 ACM.

关键词： controllers

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Modeling of hot rolling industrial process using fuzzy logic

Modeling of hot rolling industrial process using fuzzy logic

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22nd International Conference on computer Applications in Industry and engineering 2009, CAINE 2009

作者： Sheta, A. Öznergiz, E. Abdelrahman, M.A. Babuska, R. Giza Egypt Automatic Control Department Mechanical Engineering Faculty Istanbul Technical University Istanbul 34437 Turkey Electrical and Computer Engineering Department Tennessee Technological University Cookeville TN 38505 United States Delft Center for Systems and Control Delft University of Technology Netherlands

ISBN: (纸本)9781615676668

Steel making is known as a complex manufacturing industrial process. Automation of the process represents a challenge. Empirical mathematical modeling of the process was used to design mill equipment, ensure productivity and service quality. This modeling approach shows many problems associated to complexity and time consumption. Soft computing techniques show significant modeling capabilities on handling complex nonlinear systems modeling. In this paper, we explore the use of Takagi-Sugeno (TS) technique to develop fuzzy models for the Hot-Rolling industrial nonlinear process. We propose three models for the rolling force, torque and slab temperature. A set of rules and membership functions which represents the dynamical relationship between the input and output of these models shall be presented. The performance of the fuzzy models will be compared to the known empirical models for the hot rolling system. Experimental data measured from the Ere˜gli Iron and Steel Factory in Turkey shall be used for the verification of the model outstanding performance.

关键词： Hot rolling

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Kernel nonparametric weighted feature extraction for hyperspectral image classification

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IEEE Transactions on Geoscience and Remote Sensing 2009年第4期47卷 1139-1155页

作者： Kuo, Bor-Chen Li, Cheng-Hsuan Yang, Jinn-Min Graduate Institute of Educational Measurement and Statistics National Taichung University Taichung 40306 Taiwan Department of Electrical and Control Engineering National Chiao Tung University Hsinchu 300 Taiwan Department of Computer Science and Information Engineering National Chung Cheng University Chiayi 621 Taiwan

In recent years, many studies show that kernel methods are computationally efficient, robust, and stable for pattern analysis. Many kernel-based classifiers were designed and applied to classify remote-sensed data, and some results show that kernel-based classifiers have satisfying performances. Many studies about hyperspectral image classification also show that nonparametric weighted feature extraction (NWFE) is a powerful tool for extracting hyperspectral image features. However, NWFE is still based on linear transformation. In this paper, the kernel method is applied to extend NWFE to kernel-based NWFE (KNWFE). The new KNWFE possesses the advantages of both linear and nonlinear transformation, and the experimental results show that KNWFE outperforms NWFE, decision-boundary feature extraction, independent component analysis, kernel-based principal component analysis, and generalized discriminant analysis. © 2006 IEEE.

关键词： Image classification

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Polarity reversal in streaming electrification measurements

Polarity reversal in streaming electrification measurements

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Conference on electrical Insulation and Dielectric Phenomena, (CEIDP)

作者： D. Zmarzly P. Aksamit Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Poland

In the paper measurements of streaming electrification current in the range of low velocities are presented. The measurements were conducted in spinning disk system that uses wireless rotating electrometer. Using this system it is possible to measure electrification current in the range of several picoamperes. In proposed configuration the electrometer is installed in measurement object on the disk axle. The digital output is transferred using Bluetooth radio-frequency transceiver. This solution minimizes external disturbances and allows for measurement with standard uncertainty at the level of 30 fA depending on averaging time. The uncertainty slightly depends on spinning velocity. Several dependencies of averaged electrification current on rotational speed were shown. A fresh and C 60 fullerene doped transformer oil were used as an electrification source. It was observed that the electrification current can change its sign for different C 60 concentrations. Doping mineral oil leads to charge reversal in the electric double layer. The system presented in paper extends the range of possible research in the field of electrification on low velocities and can be useful in development of streaming electrification phenomena.

关键词： Current measurement Spinning Velocity measurement Rotation measurement Axles Bluetooth Radio frequency Transceivers Measurement uncertainty Time measurement

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A graph-based approach for clustering analysis of gene expression data by using topological features

A graph-based approach for clustering analysis of gene expre...

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2009 WRI World Congress on computer science and Information engineering, CSIE 2009

作者： Wenjun, Wang Junying, Zhang Jin, Xu Yue, Wang School of Computer Science and Technology Xidian University Xi'an 710071 China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University United States

ISBN: (纸本)9780769535074

This paper proposed a graph-based clustering approach for gene expression data. The new method is based on regulatory network graph obtained from gene expression data. Clustering is performed based on the topological features of the graph which characterizes the regulatory relationships between genes, which is different from the conventional methods that simply group genes with similar gene expression patterns. The performance of the proposed method is assessed by real gene expression data clustering. The results clearly show that the proposed method can give higher accuracies in clustering recognition than the traditional approaches which are based on similarity between gene expression patterns. © 2008 IEEE.

关键词： Gene expression

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Design and stiffness modeling of a soft multi-fingered mechanism

Design and stiffness modeling of a soft multi-fingered mecha...

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2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009

作者： Hyo Lung, Cha Byung-Ju, Yi Department of Electronic Electrical Control and Instrument Engineering University of Hanyang Ansan Kyunggi-Do Korea Republic of School of Electrical Engineering and Computer Science University of Hanyang Ansan Kyunggi-Do Korea Republic of

ISBN: (纸本)9781424426935

This paper presents the design and stiffness modeling of a soft multi-fingered hand. First, the structure and the kinematics of one soft finger are introduced. The finger has a soft feature by using a spring as its backbone. Using five soft fingers, a multi-fingered hand is designed. Secondly, the stiffness modeling of the soft finger is conducted to measure the softness of the finger mechanism as well as estimate the actuator size. Finally, usefulness of the multi-fingered hand is demonstrated through experimental work grasping rigid and flexible objects. ©2009 IEEE.

关键词： Stiffness

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Smartphone, PDA and embedded devices as mobile monitoring stations of biotelemetric system

Smartphone, PDA and embedded devices as mobile monitoring st...

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2009 5th IEEE GCC Conference and Exhibition, GCC 2009

作者： Krejcar, Ondrej Janckulik, Dalibor Martinovic, Jan Department of Measurement Control Centre for Applied Cybernetics Faculty of Electrical Engineering and Computer Science 17. listopadu 15 708 33 Ostrava-Poruba Czech Republic VSB-Technical University of Ostrava Faculty of Electrical Engineering and Computer Science Department of Computer Science 17. listopadu 15 708 33 Ostrava-Poruba Czech Republic

ISBN: (纸本)9781424438853

The main goal of our project is to provide solution which can be used in different areas of health care and which will be available through PDAs (Personal Digital Assistant), web browsers or desktop clients. The realized system deals with an ECG sensor connected to mobile equipment, such as PDA/Embedded, based on Microsoft Windows Mobile operating system. The whole system is based on the architecture of .NET Compact Framework, and Microsoft SQL Server. The project was successfully tested in real environment in cryogenic room (-136°C).

关键词： Electrocardiograms

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