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Heuristic regression method for descriptive data analysis 16

Heuristic regression method for descriptive data analysis

引用

16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Gomes, Flavio A. Gomes, Viviane M. Assis, Alfredo De O. Reis, Marcio R. Da C. Da Cruz, Gelson Calixto, Wesley P. Electrical Mechanical and Computer Engineering School University of Goias Brazil Experimental and Technological Research and Study Group Federal Institute of Goias Brazil Program in Electronic Systems and Automation University of Brasilia Brazil

ISBN: (纸本)9781509023196

The purpose of this paper is to use the hybridized optimization method in order to find mathematical structures for analysis of experimental data. The heuristic optimization method will be hybridized with deterministic optimization method in order to that structures found require not knowledge about data generated experimentally. Three case studies are proposed and discussed to validate the results. The proposed method has viable solution for the analysis of experimental data and extrapolation, with mathematical expression reduced. © 2016 IEEE.

关键词： Heuristic methods

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Computation of resistance and potential of grounding grids in any geometry 16

Computation of resistance and potential of grounding grids i...

引用

16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Pires, Thyago G. Nerys, Jose W. L. Silva, Carlos L. B. Oliveira, Diogo N. Filho, Antonio M. Silva Calixto, Wesley P. Alves, Aylton J. School of Electric and Computing Engineering Federal University of Goias Goiania Brazil Graduate Program in Electronic and Automation Systems Engineering University of Brasilia Brasilia Brazil Experimental and Technologic Research and Study Group Federal Institute of Education Science and Technology Goiania Brazil

ISBN: (纸本)9781509023196

This paper deals with the computation of ground resistance, surface voltage, touch voltage and step voltage, to mesh with horizontal wires arranged in different angles. The computer program implemented used in the mathematical modeling is based on the method proposed by Heppe, which allows obtaining the grounding parameters for homogeneous soil and soil stratified in two layers. The results obtained with the proposed method will be compared with other methods in literature. Also will be presented the results of a grounding grid using wires at various angles. © 2016 IEEE.

关键词： Mesh generation

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Optimization of grounding grid's multidesign geometry 16

Optimization of grounding grid's multidesign geometry

引用

16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Silva, Carlos L. B. Oliveira, Diogo N. Pires, Thyago G. Nerys, Jose W. L. Barbosa, Paulo H. S. Calixto, Wesley P. Alves, Aylton J. Graduate Program in Electronic and Automation Systems Engineering University of Brasilia Brasilia Brazil School of Electric and Computing Engineering Federal University of Goias Goiania Brazil Experimental Technologic Research and Study Group Federal Institute of Education Science and Technology Goiania Brazil

ISBN: (纸本)9781509023196

This paper deals with the optimization of grounding grids geometry. The goal is to reduce the amount of material to deploy a grounding grid, while keeping the system security. The touch voltages, step voltages, GPR and ground resistance are parameters of grounding grids and are related to safety aspect. Also discussed is a genetic algorithm used for optimizing ground grids, which can assume any form in a limited space of the project. The simulation is based in images method. The results are presented and discussed. © 2016 IEEE.

关键词： Ground penetrating radar systems

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Soil resistivity study and simulation with finite elements method 16

Soil resistivity study and simulation with finite elements m...

引用

16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Pereira, Thiago Martins De Lima, Rodrigo Alves Gomes, Viviane Margarida Gutembergue, Sostenes Alves, Aylton Jose Calixto, Wesley Pacheco Electrical Mechanical and Computer Engineering School EMC Federal University of Goias UFG Brazil Experimental and Technological Research and Study Group NExT Federal Institute of Goias IFG Brazil Program in Electronic Systems and Automation PGEA University of Brasilia UnB Brazil

ISBN: (纸本)9781509023196

This work purpose is to study the influence of concrete buried structures in grounding systems. Comparison of soil characteristics between dry and rainy seasons and soil electrical behavior was carried out. Simulations in finite element method was performed for tree layer stratified soil and the electrostatic equipotential surfaces were mapped into the region of interest. © 2016 IEEE.

关键词： Finite element method

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Influence of slot geometry on air gap magnetic flux density of rotating machines 16

Influence of slot geometry on air gap magnetic flux density ...

引用

16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： De Lima, Rodrigo Alves Coimbra, A. C. Paulo Almeida, Tony Gomes, Viviane Margarida Pereira, Thiago Martins Alves, Aylton Jose Calixto, Wesley Pacheco Program in Electronic Systems and Automation PGEA Department of Electrical Engineering ENE University of Brasilia UnB Brazil Institute of Systems and Robotics ISR University of Coimbra UC Portugal Experimental and Technological Research and Study Group NExT Federal Institute of Goias IFG Brazil

ISBN: (纸本)9781509023196

The objective of this work is to investigate the influence of slotted air gap constructive parameters on magnetic flux density of rotating machines. For this purpose, different approaches were used to solve the air gap field diagram using finite element method and the magnetic field distribution uniformity was evaluated by Carter's factor calculation. Sensitivity analysis of slot constructive parameters was performed and results show that slot geometry modifies the magnetic flux on air gap and shifts the air gap magnetic equipotential midline of double slotted machines. © 2016 IEEE.

关键词： Finite element method

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Heuristic Methodology for Horizontal Multilayer Soil Stratification

Heuristic Methodology for Horizontal Multilayer Soil Stratif...

引用

IEEE International Conference on Environment and Electrical engineering

作者： Diogo N. Oliveira Carlos L.B. Silva Wesley P. Calixto Aylton J. Alves Viviane Gomes José Luís Domingos Graduate Program in Electronic and Automation Systems Engineering University of Brasilia Brasilia Brazil Experimental Technological Research and Study Group Federal Institute of Education Science and Technology Goiania Brazil

ISBN: (纸本)9781509023219

Soil Stratification methods are used to estimate soil geoelectrical parameters. Several stratification methods are available, but reducing the error estimation introduced by such methods still poses as a challenge. The purpose of this work is to present a heuristic algorithm applied to the optimization of geoelectrical prospection process. The goal is to estimate soil parameters, such as the amount of layers, thickness and resistivity of each layer in an optimal and automated manner. The algorithm consists of analyzing the sensitivity of sampling space parameters. The propose methodology shows error reduction above 75% between the experimental and theoretical curves of the analyzed soils. The results are presented and discussed.

关键词： Heuristic algorithm soil stratification parameter sensitivity

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Optimization of Grounding Grid's Multidesign Geometry

Optimization of Grounding Grid's Multidesign Geometry

引用

IEEE International Conference on Environment and Electrical engineering

作者： Carlos L.B. Silva Diogo N. Oliveira Thyago G. Pires José W.L. Nerys Paulo H.S. Barbosa Wesley P. Calixto Aylton J. Alves. Graduate Program in Electronic and Automation Systems Engineering University of Brasilia Brasilia Brazil School of Electric and Computing Engineering Federal University of Goias Goiania Brazil Experimental Technologic Research and Study Group Federal Institute of Education Science and Technology Goiania.Brazil

ISBN: (纸本)9781509023219

关键词： Grounding grid systems image method optimization

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Soil resistivity study and simulation with finite elements method

Soil resistivity study and simulation with finite elements m...

引用

IEEE International Conference on Environment and Electrical engineering

作者： Thiago Martins Pereira Rodrigo Alves de Lima Viviane Margarida Gomes Sóstenes Gutembergue Aylton José Alves Wesley Pacheco Calixto Electrical Mechanical & Computer Engineering School EMC Federal University of Goias UFG Experimental & Technological Research and Study Group NExT Federal Institute of Goias IFG Program in Electronic Systems and Automation PGEA University of Brasilia UnB

ISBN: (纸本)9781509023219

关键词： Grounding systems finite elements method climate seasonality

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Influence of slot geometry on air gap magnetic flux density of rotating machines

Influence of slot geometry on air gap magnetic flux density ...

引用

IEEE International Conference on Environment and Electrical engineering

作者： Rodrigo Alves de Lima A. C. Paulo Coimbra Tony Almeida Viviane Margarida Gomes Thiago Martins Pereira Aylton José Alves Wesley Pacheco Calixto Program in Electronic Systems and Automation PGEA Department of Electrical Engineering ENE University of Brasilia UnB Institute of Systems and Robotics ISR University of Coimbra UC Experimental & Technological Research and Study Group NExT Federal Institute of Goias IFG

ISBN: (纸本)9781509023219

关键词： Carter's factor finite elements method rotating machines

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Computation of Resistance and Potential of Grounding Grids in Any Geometry

Computation of Resistance and Potential of Grounding Grids i...

引用

IEEE International Conference on Environment and Electrical engineering

作者： Thyago G. Pires José W. L. Nerys Carlos L. B. Silva Diogo N. Oliveira Antonio M. Silva Filho Wesley P. Calixto Aylton J. Alves School of Electric and Computing Engineering. Federal University of Goias. Goiania Brazil Graduate Program in Electronic and Automation Systems Engineering. University of Brasilia. Brasilia Brazil Experimental & Technologic Research and Study Group. Federal Institute of Education Science and Technology. Goiania Brazil

ISBN: (纸本)9781509023219

关键词： ground grid leakage current mesh voltage multilayer soil surface potential

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