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SAR simulations of EMF exposure due to tablet operation close to the user's body

SAR simulations of EMF exposure due to tablet operation clos...

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SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2015

作者： Ferreira, Juliana Borges Almeida De Salles, Álvaro Augusto Fernández-Rodriguez, Claudio Enrique Post-graduation Program in Electrical Engineering Federal University of Rio Grande do Sul UFRGS Porto AlegreRS Brazil Electrical Engineering Department Federal University of Rio Grande do Sul UFRGS Porto AlegreRS Brazil Federal Institute for Education Science and Technology of Rio Grande do Sul IFRS CanoasRS Brazil

ISBN: (纸本)9781467394925

This paper shows an analysis of the interaction of the electromagnetic field generated by a tablet with three different models of human heads: a homogeneous model Specific Anthropomorphic Mannequin (SAM) and two heterogeneous models: an adult man and a child. The assessing dosimetric parameters used are the Specific Absorption Rate (SAR) computed by SEMCAD X. The distance between the tablet and the head models varies from 50 mm to 200 mm. The SAR decreases with the distance. The higher SAR values were obtained for SAM while the smaller for the adult. All the results are below the safety recommendations from the International Commission Non-Ionizing Radiation Protection (ICNIRP) and the Federal Communications Committee (FCC). © 2015 IEEE.

关键词： Dosimetry

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Voice pathology assessment using wavelet based on texture analysis of recurrence plots

Voice pathology assessment using wavelet based on texture an...

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International Workshop on Telecommunications, IWT 2015

作者： Souza, Taciana A. Souza, Micael A. Costa, Silvana C. Costa, Washington C. De A. Correia, Suzete E. N. Vieira, Vinicius J. D. Academic Unity of Industry - IFPB Av. Primeiro de Maio 720 Jaguaribe João Pessoa - PBCEP: 58015-430 Brazil Electrical Engineering Post-graduation Program - UFCG Rua AprigioVeloso 882 Bairro Universitário Campina Grande - PBCEP: 58429-900 Brazil

ISBN: (纸本)9781467376228

This work proposes an efficient texture classification strategy performed in the wavelet domain in order to characterize healthy and pathological speech signals from recurrence plots (RP). The two-dimensional wavelet transform is applied to the recurrence plots at one resolution level. Thirteen Haralick texture features are obtained from each approximation and detail subband coefficients. In classification, multilayer perceptron (MLP) neural networks with cross validation are employed. Classification accuracy is improved and the number of features is reduced by particle swarm optimization (PSO). Results suggest that this method may be useful for pathological voice discrimination. © 2015 IEEE.

关键词： Wavelet transforms

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INDUCTIVE FILTER DESIGN FOR THREE-PHASE GRID CONNECTED POWER CONVERTERS

INDUCTIVE FILTER DESIGN FOR THREE-PHASE GRID CONNECTED POWER...

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Brazilian Power Electronics Conference

作者： F. L. Paukner C. Nardi E. G. Carati C. M. O. Stein R. Cardoso J. P. da Costa Post-Graduation Program in Electrical Engineering - PPGEE Federal University of Technology - Parana

ISBN: (纸本)9781479987801

This paper presents a design methodology for a first order L filter inductance used to connect a three-phase power converter to the grid. This method uses the desired THD_i to calculate the L filter inductance to ensure the grid-connection standards are met. This methodology was designed for converters operating with Space Vector PWM modulation.

关键词： Inductive filter design Grid-connected three-phase inverted

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Parallel genetic algorithm with social interaction for solving constrained global optimization problems

Parallel genetic algorithm with social interaction for solvi...

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International Conference of Soft Computing and Pattern Recognition (SOCPAR)

作者： Rodrigo Lisbôa Edson Koiti Yasojima Rodrigo M. S. de Oliveira Marco A. Florenzano Mollinetti Otávio Noura Teixeira Roberto C. Limão de Oliveira Pereira Electrical Engineering Post Graduation Program Federal University of Pará (UFPA) Belém Pará Brazil Systems Optimization Laboratory Tsukuba University Tsukuba Ibaraki Japan Electrical Engineering Post Graduation Program Federal University of Pará (UFPA) Belém Pará Brazil Laboratory of Electromagnetics (LeMag) Federal University of Pará (UFPA) Belém Pará Brazil Laboratory of Bionspired Computing (LCBIO) Federal University of Pará (UFPA) Belém Brazil Pará

The following paper introduces a parallel approach to a social variant of the Genetic Algorithm, called Parallel Genetic Algorithm with Social Interaction (PSIGA). The algorithm is based on social games involving game theory, and it is implemented using the OpenMP API, which is based on the shared memory programming model for multiple processor architectures. The main contribution of this approach is the parallelization using the Shared Memory of the Social Interaction Genetic Algorithm (SIGA) in order to achieve faster and better optimality than its nonparallel counterpart for global optimization problems with restrictions. For means of performance assessment, the algorithm is tested on four instances of engineering design problems and the obtained results compared with the Genetic Algorithm with Social Interaction (SIGA) implemented in sequential programming model.

关键词： Genetic algorithms Sociology Statistics Optimization Games Game theory Instruction sets

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A NOVEL APPROACH FOR HOME APPLIANCES IDENTIFICATION USING VECTOR PROJECTION LENGTH AND STOCKWELL TRANSFORM

A NOVEL APPROACH FOR HOME APPLIANCES IDENTIFICATION USING VE...

引用

Brazilian Power Electronics Conference

作者： Vinicius P. Borin Carlos H. Barriquello Mario L. da Silva Martins Alexandre Campos GEDRE Research Group - Electrical Engineering Post Graduation Program (PPGEE) Federal University of Santa Maria (UFSM)

ISBN: (纸本)9781479987801

Identification of residential electrical appliances has been a highlight area of research in recent years due to increasing energy consumption in the residential sector around the world. This paper addressed a novel method for recognition of electrical appliances. Thus, it is proposed to apply the Stockwell Transform, a time-frequency domain transform, into current data collected from 17 commonly present electrical appliances in our houses. With these data, we applied an image pattern recognition technique, called Vector Projection Length. In this case, the idea is to recognize patterns in the appliances transformed into time-frequency domain. An extensive analysis technique simulation is presented here, showing the variation of the technical parameters and their influence on the results of identification.

关键词： Digital Image Processing Intelligent Systems Load Identification S-Transform Vector Projection Length

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SAR simulations of EMF exposure due to tablet operation close to the user's body

SAR simulations of EMF exposure due to tablet operation clos...

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SBMO/IEEE MTT-S International Conference on Microwave and Optoelectronics (IMOC)

作者： Juliana Borges Ferreira Álvaro Augusto Almeida de Salles Claudio Enrique Fernández-Rodriguez Post-graduation program in Electrical Engineering Federal University of Rio Grande do Sul Porto Alegre RS Brazil Electrical Engineering Department Federal University of Rio Grande do Sul Porto Alegre RS Brazil Science and Technology of Rio Grande do Sul Federal Institute for Education Canoas RS Brazil

关键词： Phantoms Specific absorption rate Antennas Head Computational modeling Magnetic heads Dielectrics

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Voice pathology assessment using wavelet based on texture analysis of recurrence plots

Voice pathology assessment using wavelet based on texture an...

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International Workshop on Telecommunications (IWT)

作者： Taciana A. Souza Micael A. Souza Silvana C. Costa Washington C. de A. Costa Suzete E. N. Correia Vinícius J. D. Vieira Academic Unity of Industry IFPB João Pessoa PB Brazil Instituto Federal de Educacao Ciencia e Tecnologia da Paraiba Joao Pessoa ParaÃba BR Electrical Engineering Post-graduation Program UFCG Campina Grande PB Brazil

关键词： Speech Pathology Entropy Wavelet transforms Correlation Feature extraction

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Motor drive systems reliability: Impact of the environment conditions on the electronic component failure rates

Motor drive systems reliability: Impact of the environment c...

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2014 IEEE Industry Application Society Annual Meeting, IAS 2014

作者： Souza, F.A.L. Pereira, P.C.T. De Paula, Helder Filho, Braz J. C. Rocha, A.V. Post-Graduation Program in Electrical Engineering Federal University of Minas Gerais Belo Horizonte Brazil Federal University of Minas Gerais Electrical Engineering Dept. Belo Horizonte Brazil CEFET - MG Electrical Engineering Dept. Belo Horizonte Brazil

ISBN: (纸本)9781479922888

This article discusses the actual failure rate of electronic components when these are exposed to harsh environments, which can include vibration, dust, humidity, high temperature and others. It presents a compilation on the physico-chemical effects that can take place when electronic components are stressed and how such effects can reduce the component life. It is also presented a compilation of the results of a thorough and comprehensive research on different standards for reliability prediction, along with a critical and comparative analysis between the methodologies and applications related to each one of them. Furthermore, to provide the reader a broader understanding of the methodology used in these standards, an example employing a typical SV-PWM converter used in motor drive systems, submitted to different environmental stresses, is used as a case study. © 2014 IEEE.

关键词： Failure rate

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Feature selection based on binary particle swarm optimization and neural networks for pathological voice detection

Feature selection based on binary particle swarm optimizatio...

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Latin America Congress on Computational Intelligence (LA-CCI)

作者： Taciana A. Souza Micael A. Souza Washington C. de A. Costa Silvana C. Costa Suzete E. N. Correia Vinícius J. D. Vieira Academic Unity of Industry Federal Institute of Education Science and Technology of Paraíba João Pessoa Brasil Academic Unity of Industry Federal Institute of Education Science and Technology of Paraíba João Pessoa Brasil Electrical Engineering Post-graduation Program Federal University of Campina Grande João Pessoa Brazil Universidade Federal de Campina Grande Campina Grande PB BR

Laryngeal pathologies directly affect the quality of the voice. In the last years, digital signal processing techniques have been applied for detection of vocal fold pathologies through speech signal analysis. In this work, a binary Particle Swarm Optimization (PSO) algorithm using Multilayer Perceptron (MLP) neural network is employed for the selection of the most significative features in a pathological voice detection system. The discrimination between healthy and pathological speech signals are obtained by 52 Haralick texture features, extracted from two-dimensional wavelet coefficients of the speech signals recurrence plots. The fitness function adopted is based in the maxima accuracy rate. Experimental results show that the use of PSO increased the accuracy rates with a minimum number of features.

关键词： Feature extraction Speech Pathology Wavelet transforms Particle swarm optimization Neural networks

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RepoSDN: An repository organization and coordination method of software defined networks applications

RepoSDN: An repository organization and coordination method ...

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IEEE Symposium on Network Operations and Management

作者： Rômulo S. Pinheiro Billy A. Pinheiro Rafael P. Esteves Antônio J. G. Abelém Computer Science Post-graduation Program (PPGCC) Federal University of Pará (UFPA) Electrical Engineering Post-graduation Program (PPGEE) Federal University of Pará (UFPA) Federal University of Rio Grande do Sul (UFRGS)

ISBN: (纸本)9781479909117

programmability is one of the key factors on software defined networks (SDN), once it allows to decouple between data plan and control plan. However, in such context, managing several applications' inputs and outputs is a little explored task on controllers field, which are not in a controlled and organized environment. This article proposes a method to make SDN applications to reach the administrator, allow him to manage his use in the network. This proposal is validated through performance tests in the repository, which stores the applications, along with developed modules to help its management and control, making the organization and coordination method safe, efficient and adjustable to any controller on software-defined network.

关键词： Software Computer architecture Organizations Servers Hardware Process control Standards organizations

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