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5th International Conference on Information Processing, ICIP 2011

作者： Seetha, H. Narasimha Murty, M. Saravanan, R. School of Computing Science and Engineering VIT University Vellore-632014 India Department of Computer Science and Automation Indian Institute of Science Bangalore India School of Information Technology and Engineering VIT University Vellore-632014 India

ISBN: (纸本)9783642227851

The generalization performance of the SVM classifier depends mainly on the VC dimension and the dimensionality of the data. By reducing the VC dimension of the SVM classifier, its generalization performance is expected to increase. In the present paper, we argue that the VC dimension of SVM classifier can be reduced by applying bootstrapping and dimensionality reduction techniques. Experimental results showed that bootstrapping the original data and bootstrapping the projected (dimensionally reduced) data improved the performance of the SVM classifier. © Springer-Verlag 2011.

关键词： Classification (of information)

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Robust fault-tolerant tracking control for a near-space vehicle using a sliding mode approach

Robust fault-tolerant tracking control for a near-space vehi...

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作者： Jiang, B. Xu, Y. Shi, P. Gao, Z. College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd United Kingdom School of Engineering and Science Victoria University Melbourne VIC Australia

In this study, a flight fault-tolerant control scheme based on an adaptive sliding mode technique is proposed. First, a control allocation of a near-space vehicle (NSV) attitude dynamics is analysed, and actuator fault modelling is introduced. Then, a modified sliding model tracking control approach, using a continuous strategy of integral sliding mode control, is designed to improve the position tracking precision. This scheme can solve the chattering problem without loss of robustness and control accuracy. Actuator fault and unmeasurable external disturbances are compensated for by an integral action term. To verify the effectiveness of the proposed control scheme, a numerical simulation is performed for an NSV attitude system, which is a non-linear aircraft model with six degrees of freedom. Simulation results demonstrate that the closed-loop system has good performance in spite of the actuator fault and system disturbances. © 2011 Author.

关键词： Degrees of freedom (mechanics)

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Modeling and PostGIS implementation of the basic planar imprecise geometrical objects and relations

Modeling and PostGIS implementation of the basic planar impr...

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9th International Symposium on Intelligent Systems and Informatics, SISY 2011

作者： Obradović, D. Konjović, Z. Pap, E. Rudas, I.J. Faculty of Technical Sciences Department of Computing and Automation Novi Sad Serbia Faculty of Sciences Department of Mathematics and Informatics Novi Sad Serbia Obuda University Institute of Intelligent Engineering Systems H-1034 Budapest Hungary

ISBN: (纸本)9781457719745

In this paper it is introduced a new mathematical model of basic planar imprecise geometric objects: fuzzy line, fuzzy triangle and fuzzy circle, as well as basic spatial relations: coincidence, between and collinear. Models are implemented as an extension of the PostGIS spatial data managing system in Pl/ PgSQL language. © 2011 IEEE.

关键词： Computational modeling Data models Geometry Informatics Intelligent systems Mathematical model Pl/ PgSQL language PostGIS spatial data managing system SQL Spatial databases fuzzy circle fuzzy line fuzzy set theory fuzzy triangle geographic information systems geometry planar imprecise geometric objects spatial relations visual databases

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Global Robust Output Regulation of Nonlinear Systems subject to a Nonlinear Exosystem

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IFAC Proceedings Volumes 2011年第1期44卷 1368-1373页

作者： X. Yang J. Huang Applied Control and Computing Laboratory Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong

Abstract The global robust output regulation problem for nonlinear plants subject to nonlinear exosystems has been a challenging problem and has not been well addressed. The main difficulty lies in finding a suitable internal model. In this paper, we first propose a new class of internal models which is guaranteed to exist under the generalized immersion condition [2]. An advantage of this internal model is that it is zero input globally asymptotically stable. This fact will facilitate the global stabilization of the augmented system associated with the given plant and the internal model. Then we will further utilize this class of internal models to solve the global robust output regulation problem for output feedback systems with a nonlinear exosystem.

关键词： Output regulation Nonlinear exoystem Internal model design

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Crane scheduling of steel-making and continuous casting process using the Mixed-timed Petri net modelling via CPLEX optimization

Crane scheduling of steel-making and continuous casting proc...

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作者： Sun, Liangliang Liu, Wei Chai, Tianyou Wang, Hong Zheng, Binglin State Key Laboratory of Integrated Automation for Process Industry Northeastern Universit Shenyang 110004 China Manufacturing Computing Lab. Electrical Engineering Department University of Connecticut Storrs CT United States

ISBN: (纸本)9783902661937

The key issues for iron and steel production in terms of improved productivity are to realize a good crane scheduling for a well-organized rhythm of the whole production and to improve the transportation efficiency of cranes in a computational manner to assist the main equipment scheduling. In this paper a Mixed-timed Petri net modeling is introduced to minimize the makespan of the whole steelmaking and continuous casting process. The crane scheduling problem is formulated as the optimization of firing transition sequences based on the Mixed-timed Petri net (i.e., the Petri net that includes time-transitions and zero-time transitions). Then the formulation is converted to a linear model that can be solved using the branch-and-cut method in the standard commercial solver CPLEX. Special methods for the linear conversion are developed. Due to the limited calculation time required for the scheduling and the scale of the problem, special methods for the efficiency tuning are applied according to the characteristics of the problem. Numerical testing supported by Shanghai Bashan steel plant has demonstrated a significant improvement over the traditional manual scheduling results, showing an improved effectiveness in terms of assisting the on-site schedulers to obtain a better strategy for steelmaking and continues casting. © 2011 IFAC.

关键词： Steelmaking

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User P-Q diagram as a tool in reactive power trade

User P-Q diagram as a tool in reactive power trade

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International Conference on The European Energy Market

作者： Ilic, Ivan Viskovic, Alfredo Vrazic, Mario Department of Electric Machines Drives and Automation Faculty of Electrical Engineering and Computing University of Zagreb Unska 3 HR-10000 Zagreb Croatia Ulica grada Vukovara 37 HR-10000 Zagreb Croatia

ISBN: (纸本)9781612842844

Trading with reactive power will soon become a very important part of electric energy trade. However, while trading, voltage regulation in portable and distribution systems must not be neglected. In order to balance the technical and economic aspects it is necessary to be familiar with the electric power system, the source of electric energy most of all, meaning the synchronous generator and its possibilities. These possibilities are shown in the synchronous generator P-Q diagram. We nowadays use static P-Q diagrams, provided by generator producers, which in most cases refer only to generators. This article presents a dynamic user P-Q diagram containing changeable parameters and showing a real availability of a synchronous aggregate. © 2011 IEEE.

关键词： Synchronous generators

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An effective approach for the scheduling of steel-making and continuous casting system with stochastic processing requirements

An effective approach for the scheduling of steel-making and...

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作者： Sun, Liangliang Liu, Wei Luh, Peter B. Chai, Tianyou Zheng, Binglin State Key Laboratory of Integrated Automation for Process Industry Northeastern University Shenyang Liaoning Province 110819 China Manufacturing Computing Lab. Electrical Engineering Department University of Connecticut Storrs CT United States

ISBN: (纸本)9783902661937

The steel-making and continuous casting system (SCCS) is the bottleneck in the iron and steel production, SCCS often involve various uncertainties such as the emergency customer orders, inaccurate estimate of ingredient components, the unpredictable machine breakdown or the inaccurate estimate of processing time. How to consider such uncertainties to build a better schedule in a limited time by a computationally efficient manner is becoming critical for the production of iron and steel. The stochastic dynamic programming method is adopt to solve the obtained subproblems which are relaxed by Lagrangian relaxation multipliers, a good dual solution is selected by using "ordinal optimization," and the actual schedule is dynamically constructed based on the dual solution and the realization of random processing requirements. The method has been tested by using practical data from the Shanghai Bashan steel plant in China and could get near optimal solutions in a limited time;the stochastic processing requirements are effectively handled for the production. © 2011 IFAC.

关键词： Continuous casting

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TP transformation based control of rotary pendulum

TP transformation based control of rotary pendulum

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Proceedings of the International Convention MIPRO

作者： Šandor Ileš Jadranko Matuško Fetah Kolonić Department of Electrical Machines Drives and Automation Faculty of Electrical Engineering and Computing University of Zagreb Croatia

The Tensor Product (TP) model transformation is a recently proposed technique for transformation of a given Linear Parameter Varying (LPV) state-space model into polytopic model form, namely, to parameter varying convex combination of Linear Time Invariant (LTI) systems. The main advantage of the TP model transformation is that it is executable in a relatively short time and the Linear Matrix Inequality (LMI)-based control design frameworks can immediately be applied to the resulting polytopic models. In this paper, such control approach of nonlinear systems is applied to the control of rotary pendulum gantry. Pendulum in hanging position represents simplified model of the real industry crane application. On the other hand, inverted pendulum is a classic problem in dynamics and control theory and widely used as a benchmark for testing control algorithms. In order to reach upright position, self erecting technique is employed. LMI control algorithm obtained for both positions is merged using self erecting control algorithm and tested in real experimental setup.

关键词： Cranes Mathematical model Heuristic algorithms Tensile stress Control design Stability analysis Linear matrix inequalities

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Matlab/GUI interface for simulation of power electronic converters

Matlab/GUI interface for simulation of power electronic conv...

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作者： Višnić, R. Šunde, V. Mrčela, I. HEP - Distribution System Operator Ltd. Elektra Karlovac Vladka Maeka 44 Karlovac Croatia Faculty of Electrical Engineering and Computing Department of Electric Machines Drives and Automation Zagreb Croatia

ISBN: (纸本)9789532330670

Computational tool for modeling and simulation Matlab/Simulink is one of the program packages for simulation of electrical behaviour of power electronics circuits. Besides all its advantages, primarily its efficient numerical core, its shortcomings include graphically complex block schemes used in Simulink to create the simulation models. An additional drawback of this method of creating simulation models is knowledge of the basics of Matlab/Simulink software package. This paper describes an application developed in the Matlab/GUI environment that represents an interface between the user and the prepared base of simulation models of typical circuits of electronic converters. The user selects converter circuits from the base that are represented by usual electrical schemes. Element model parameters in the simulated schemes can be changed as well as conditions for progress of transient simulation. Upon completion of the simulation the simulated waveforms are shown in the same window as the electrical scheme. The user does not need to know how to work with the simulation program;one only needs to concentrate on the analysis of operation of the simulated converter circuits. © 2011 MIPRO.

关键词： Simulink

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Classifier ensembles and optimization techniques to improve the performance of cancellable fingerprint

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International Journal of Hybrid Intelligent Systems 2011年第3期8卷 143-154页

作者： Canuto, Anne M.P. Fairhurst, Michael C. Pintro, Fernando Xavier Junior, João C. Neto, Antonino Feitosa Gonçalves, Luis Marcos G. Department of Informatics and Applied Mathematics Federal University of RN Natal Brazil School of Engineering and Digital Arts University of Kent Canterbury UK Computing and Automation Engineering Department Federal University of RN Natal Brazil

The main aim of biometric-based identification systems is to automatically recognize individuals based on their physiological and/or behavioural characteristics such as fingerprint, face, hand-geometry, among others. These systems offer several advantages over traditional forms of identity protection. However, there are still some important aspects that need to be addressed in these systems. The main questions are concerned with the security of biometric authentication systems since it is important to ensure the integrity and public acceptance of these systems. In order to avoid the problems arising from compromised biometric templates, the concept of cancellable biometrics has recently been introduced. The concept is to transform a biometric trait into a new representation for enrolment and matching. Although cancellable biometrics were proposed to solve privacy concerns, the concept raises new issues, since they make the authentication problem more complex and difficult to solve. Thus, more effective authentication structures are needed to perform these tasks. In this paper, we investigate the use of ensemble systems in cancellable biometrics, using fingerprint-based identification to illustrate the possible benefits accruing. In order to increase the effectiveness of the proposed ensemble systems, three feature selection methods will be used to distribute the attributes among the individual classifiers of an ensemble. The main aim of this paper is to analyse the performance of such well-established structures on transformed biometric data to determine whether they have a positive effect on the performance of this complex and difficult task.

关键词： Classifier ensembles selection-based combination methods confidence measures

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