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Pattern recognition techniques applied to electric power signal processing

Pattern recognition techniques applied to electric power sig...

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international conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)

作者： Ghazi Bousaleh Mohamad Darwiche Fahed Hassoun Lebanese University Saida Lebanon Eseo Institute of Science and Technology Angers France France Telecom Nantes France

We propose in this paper an approach whose main objective is to detect disturbances that affect an electric power signal. the method allows us to locate the time occurrence of these disturbances. the signal processing consists of determining two distributions that are based on the energy of the wavelet signal decomposition: the deviation distribution and the deformation distribution. theses distributions are a signature of the disturbance and are able to provide an identification of the type of the problem. the method has been developed using the analysis by the discrete Wavelet Transform (DWT). the electrical signal is decomposed into several levels by DWT. the different waveforms resolution levels allows us to detect any deviations from the sane signal. the energy distributions data obtained in the first step will be used as feature vectors for training an artificial neural network (ANN) with multilayer perceptrons (MLPs) and support vector machines (SVMs) to classify the Power Quality Disturbance (PQD).

关键词： Signal resolution discrete wavelet transforms Harmonic analysis Energy resolution Power quality

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Processing EEG signals through Beamforming techniques for seizure diagnosis

Processing EEG signals through Beamforming techniques for se...

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2012 6th international conference on Sensing Technology, ICST 2012

作者： Veraallo, P. Lay-Ekuakille, A. Giannoccaro, N.I. Massaro, A. Urooj, S. Caratelli, D. Trabacca, A. Department of Innovation Engineering University of Salento Leece Italy Center of Bio-Molecular Nanotechnology Italian Institute of Technology IIT Leece Italy Electrical Engineering Department School of Engineering Gautam Buddha University Geater Noida India Delft University of Technology International Research Center for Telecommunications and Radar Delft Netherlands IRCSS 'E. Medea' Associazione la Nostra Famiglia Brindisi Italy

ISBN: (纸本)9781467322485

Epilepsy is one of the most common neurological disorders. It is very difficult the identification of seizures because they are infrequent events to be detected and an electroencephalogram (EEG) does not always show abnormalities due to interferences and noise. In this work, methods based on principles of spatial filtering are developed to allow a more accurate diagnosis. For this aim techniques based on Beamforming are taken into account for their ability to constrain the passing of the electrical activity from a specified location attenuating the activity to others. the problem is set as a waveform estimation, so information about amplitude and frequency of the signal are extracted from measured EEG signal. the reconstruction of the desired signal, that is the possible signal originated from epileptogenic focus, will highlight abnormalities or not in the electrical activity of the brain, and will help to have accurate diagnosis. For this scope, in this work, EEG data by scalp are simulated, in a preliminary way, through the solution of a forward problem related to geometry of the head and to the definition of a model for the envisaged source. A simple geometry is considered and, simulations and results are presented, showing the performance of several algorithms. Following the methods have been applied on real data, In this case it is necessary to know the position of the source for to reconstructing of the signal of interest. As per alternative, to estimate the position of the sources, methods of a DOA estimation have been studied. In a preliminary way this problem is faced with consideration on the resolution issue of the sources when they are very close together. © 2012 IEEE.

关键词： Beamforming

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Novel Two Dimensional discrete Chaotic Maps and Simulations

Novel Two Dimensional Discrete Chaotic Maps and Simulations

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2012 IEEE 6th international conference on Information and Automation for Sustainability（ICIAFS2012）

作者： Pei Li,Lequan Min,Yu Hu School of mathematics and Physics University of Science and Technology Beijing Beijing,10083,China Geng Zhao,Xiaodong Li Department of Computer Science and Technology Beijing Electronic Science and Technology Institute Beijing,100070,China

this paper introduces one new novel 2-dimensional quadric polynomial discrete chaotic map and seven novel triangle function combination discrete chaotic maps(2D-TFCDM).the 2D-TFCDMs have at least one positive Lyapunov... 详细信息

关键词： Novel Two Dimensional discrete Chaotic Maps and Simulations

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A Design of discrete-time SMC for Nonlinear Systems Based on Fuzzy T-S Model

A Design of Discrete-time SMC for Nonlinear Systems Based on...

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IEEE international conference Intelligent Systems

作者： Gorjan Nadzinski Goran Vladev Yan Zheng Faculty of Electrical Eng. & Information Technologies SS Cyril and Methodius University Karpos 2 BB MK-1000 Skopje R. Macedonia College of Information Science & Engineering Institute of Control Theory & Navigation Technology Northeastern University Shenyang Liaoning 110006 P.R. China

ISBN: (纸本)9781467322768

An innovated investigation of the control problem for nonlinear discrete-time plant systems via Takagi-Sugeno fuzzy model was carried out. Firstly, nonlinear dynamic plants are represented by such a fuzzy model, and then the overall fuzzy model of nonlinear plant is transformed into a class of uncertain linear systems. thus the stabilization problem of nonlinear plants was mapped into equivalent robust stabilization problem of uncertain linear systems with mismatched uncertainties. the robust stabilization of such uncertain systems is achieved by applying discrete-time sliding mode control approach. the stable sliding surface is designed via linear matrix inequalities to reduce the influence of mismatched uncertainties while also a sufficient condition for its existence was derived too. the synthesis design of the SMC guarantees system robust stabilization in closed loop. Chattering around the sliding surface in sliding mode control is also considerably reduced by this design. this novel technique was applied to the trailer-truck benchmark example and the essential simulation results are given to demonstrate feasibility and performance effectiveness of the proposed method.

关键词： Fuzzy T-S models nonlinear discrete-time systems sliding mode control robust control uncertainty fuzzy modeling Nonlinear systems SELECTION AND MONITORING CHASSIS Sheet molding compounds Small Magellanic Cloud Slip surfaces discrete-time Variable structure systems Linear system T-S fuzzy model uncertain systems linear matrix inequalities MISMATCH

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New video encoder based on Wavelet Coefficients and motion compensation

New video encoder based on Wavelet Coefficients and motion c...

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international conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)

作者： Wissal Hassen Jérôme Mbainaibeye Christian Olivier Hamid Amiri Unité de Recherche en Signal Image et Reconnaissance de Formes Ecole Nationale dIngénieurs de Tunis Tunis Tunisia Department of Technologies Faculty of Exact and Applied Sciences University of Ndjaména USA Institut XLIM Département Signal Images et Communications UMR CNRS 7252 Universite de Poitiers Chasseneuil France

discrete Wavelet Transform (DWT) is a powerful mathematical tool which has stimulated many developments in several scientific and technical fields, particularly in signal and image Processing; analysis and compression. Its multi-resolution properties are a major advantage for their use in the JPEG.2000 standard. In video coding, motion management is an important task. Indeed, on one hand, the DWT does not preserve the translation invariance because of the underlying dyadic down-sampling process. that justifies the absence of a DWT-based video compression standard until now. On the other hand, video coding standards using discrete Cosine Transform (DCT) produces often undesirable artifacts. Our contribution aims to exploit the DWT multi-resolution properties using a motion estimation technique to avoid the problem of DWT translation-invariance which leads to false motion vectors. In this paper we present a new color video compression using DWT and a motion compensation technology, that we called SSC-MC. An assessment of the proposed scheme was operated on a set of standard video sequences; the results are compared with the well known standards. It is shown that our results are promising.

关键词： Transform coding Image coding Video sequences discrete wavelet transforms PSNR Standards Video compression

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Approximation algorithms for Complex Systems : Proceedings of the 6th international conference on Al

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2011年

作者： international conference on algorithms for approximation

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A decomposition result for single server discrete-time queues with generalized vacations 11

A decomposition result for single server discrete-time queue...

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6th international conference on Queueing theory and Network Applications, QTNA 2011

作者： De Clercq, Sofian Steyaert, Bart Bruneel, Herwig SMACS Research Group St. Pietersnieuwstraat 41 9000 Gent Belgium

ISBN: (纸本)9781450307581

For several specific discrete-time queueing models with a vacation policy, the stationary system occupancy at the beginning of a random slot is distributed as the sum of two independent random variables. One of these variables is the stationary number of customers in an equivalent queueing system with no vacations. this paper aims to show that this decomposition can be applied to for a large class of discrete-time queueing systems with vacations. the analysis builds on results obtained by Fuhrmann and Cooper concerning continuous-time queueing systems with Poissonian arrivals. through some examples we show that the queueing analysis can be considerably simplified using this decomposition property. © 2011 ACM.

关键词： Queueing theory

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Teaching discrete mathematics with the constructivism learning theory

Teaching discrete mathematics with the constructivism learni...

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6th international conference on Computer Science and Education, ICCSE 2011

作者： Yahong, Hu Weihong, Wang Li, Jiang College of Computer Science and Technology Zhejiang University of Technology Hangzhou 310023 China

ISBN: (纸本)9781424497188

Constructivism theory reveals the regularity of human cognition. According to constructivism theory, students will learn best by trying to make sense of something on their own with the teacher as a guide to help them along the way. discrete mathematics is a very important course for computer majors. As discrete mathematics has quite rich contents and it is very abstract, it is not easy for students to master its spirit. In this paper, we propose applying constructivism theory to the teaching of discrete mathematics. During all the teaching phases (including teachers' preparation before class, teaching during class and students' review after class), constructivism theory is used. Our practices show that constructivism theory based teaching method can raise students' learning interests, and also can help them to understand the course better. © 2011 IEEE.

关键词： Teaching

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Analysis of discrete-time Geo/G/1 queue under the D-policy 11

Analysis of discrete-time Geo/G/1 queue under the D-policy

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6th international conference on Queueing theory and Network Applications, QTNA 2011

作者： Lee, Se Won Lee, Ho Woo Baek, Jung Woo Department of Systems Management Engineering Sungkyunkwan University Suwon Korea Republic of Department of Electrical and Computer Engineering University of Manitoba Winnipeg MB Canada

ISBN: (纸本)9781450307581

In this paper, we present a theoretical and analytical framework to analyze the discrete-time queue in which the on-off of the server is controlled by workload threshold. For this purpose, we consider the discrete-time Geo/G/1 queue under the D-policy. We derive the queue length, waiting time, sojourn time distributions and the mean performance measures. We then perform numerical computations to see the effect of the threshold and the variability of the service time distributions on the system performance. We will also see if our discrete-time results can approximate the continuous-time M/G/1/D-policy queueing system. the approach of this paper can be used as a basis for the analysis of more complex queueing systems in which the server is controlled by workload. © 2011 ACM.

关键词： Continuous time systems

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6th international conference on Queueing theory and Network Applications, QTNA 2011 - Proceedings

6th International Conference on Queueing Theory and Network ...

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6th international conference on Queueing theory and Network Applications, QTNA 2011

ISBN: (纸本)9781450307581

the proceedings contain 31 papers. the topics discussed include: Markovian single server retrial queues with two way communication;Analysis of optimal random access policies for cognitive radio networks under Rayleigh fading;a priority discipline for proportional service level differentiation;networks with cascading overloads;a decomposition result for single server discrete-time queues with generalized vacations;study of influences of negative arrival for single server retrial queuing system with coxian phase type service;statistical time-access fairness index of one-bit feedback fair scheduler;a single server batch service finite source queue with feedback;evaluation of the mean cycle time in stochastic discrete event dynamic systems;and buffer-overflow and starvation probabilities for video streaming services with application-layer rate-control mechanism.

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