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检索条件"机构=Post-Graduate Program in Electrical Engineering -COPELE"

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Comparative Analysis of Normal and ASD EEG Data Using Hjorth Parameters

Comparative Analysis of Normal and ASD EEG Data Using Hjorth...

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Human-Computer Interaction, Optimization and Robotic Applications (HORA), International Congress on

作者： Muliyadi Muliyadi Melinda Melinda Yuwaldi Away Syahrul Gazali Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh Indonesia Electrical Engineering Department Politeknik Negeri Lhokseumawe Aceh Indonesia Dept. Electrical Engineering and Computer Engineering Faculty Universitas Syiah Kuala Banda Aceh Indonesia Dept. Neurology Universitas Syiah Kuala Banda Aceh Indonesia Mahar Mardjono National Brain Center Hospital Jakarta Indonesia

ISBN: (数字)9798331510886

ISBN: (纸本)9798331510893

The increasing prevalence of autism spectrum disorder (ASD) in recent decades has underscored the need for more accurate and objective diagnostic methods. Electroencephalography (EEG) holds promise as a tool in ASD neurobiological research due to its ability to capture neural oscillatory activity with high temporal resolution. This study aims to analyze the neurophysiological differences between individuals with ASD and neurotypical populations by examining EEG data using Hjorth parameters. The preprocessing stage involved using a Butterworth filter to enhance EEG signal quality by eliminating noise in the frequency range of 4-40 Hz. The Hjorth parameters, including Activity, Mobility, and Complexity, were used to assess the statistical characteristics of the EEG signals. The analysis was conducted on EEG data collected from 5 typical individuals and 5 ASD ASD subjects. Our findings reveal that the Hjorth Activity parameter is notably lower in the ASD group across all regions, with the most significant differences observed in the left and right frontal areas, where average activity measures 0.236 μV 2 and 0.060 μV 2 in ASD individuals, compared to 0.512 μV 2 and 0.138 μV 2 in the neurotypical group. However, the Hjorth Complexity and Mobility values remained consistent between the two groups, implying that the fundamental structure of the EEG signals is relatively preserved. These findings offer insights into the neurobiological mechanisms of ASD and suggest the potential use of Hjorth parameters in developing more targeted interventions for individuals with ASD.

关键词： Human computer interaction Autism Frontal lobe Noise Neural activity Electroencephalography Complexity theory Signal resolution Robots Optimization

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Single-Phase Six-Switch Universal Active Power Filter 10

Single-Phase Six-Switch Universal Active Power Filter

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10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018

作者： Rodrigues, Phelipe L.S. Jacobina, Cursino B. Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Brazil Campina Grande Paraíba58429-900 Brazil

ISBN: (纸本)9781479973118

In this paper, three structures were developed and analyzed, these configurations are based on three-leg ac/dc/ac converters operating as a universal active power filter (UAPF) also known as unified power quality conditioner (UPQC). The proposed configurations are appropriate for a voltage sag/swell compensation, reactive power compensation, reducing losses and switches, as well as for applications where the input voltage is twice the output voltage, for example, applications in systems in Brazil where the voltages vary between 220 V (rms) and 110 V (rms) from one state to another. The proposed six-switch single-phase UAPF are compared with the conventional three-leg and four-leg single-phase UAPF solutions. The pulsewidth modulation (PWM) and control techniques are developed and presented. For validation purposes, the simulation and experimental results for proposed configurations are shown. © 2018 IEEE.

关键词： Pulse width modulation

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Three-Leg Single-Phase Universal Active Power Filter 10

Three-Leg Single-Phase Universal Active Power Filter

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10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018

作者： Rodrigues, Phelipe L. S. Jacobina, Cursino B. PPgEE COPELE Post-Graduate Program in Electrical Engineering Brazil Campina Grande Paraíba58429-900 Brazil

ISBN: (纸本)9781479973118

This paper presents a topology based on three-leg ac-dc-ac converters for active power filter (APF) applications. The proposed configuration is appropriate for voltage sag/swell compensation, reactive power compensation, and for reducing losses and the number of switches. The proposed three-leg single-phase universal active power filter (UAPF) is compared with conventional four-leg and three-leg single-phase UAPF solutions. Pulsewidth modulation (PWM) and control techniques are developed and presented. For validation purposes, simulation and experimental results of proposed configurations are shown. © 2018 IEEE.

关键词： Pulse width modulation

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System identification of a pilot scale heat exchanger: A state-space realization approach 42

System identification of a pilot scale heat exchanger: A sta...

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42nd Conference of the Industrial Electronics Society, IECON 2016

作者： Lima, Rafael B. C. Barros, Péricles R. Acioli, George Post-graduate Program in Electrical Engineering PPgEE COPELE UFCG Brazil Electrical Engineering Department Fed. University of Campina Grande Brazil

It is presented a state-space realization approach for identification of a pilot scale heat exchanger plant. The proposed methodology is a computational efficient way to estimate state-space models from experimental d...

ISBN: (纸本)9781509034741

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Bio-inspired antenna for UWB systems 1

Bio-inspired antenna for UWB systems

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1st International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2016

作者： Da Silva, Paulo Fernandes Freire, Raimundo Carlos Silverio Serres, Alexandre Jean Rene Da Fonseca Silva, Paulo Henrique Costa E Silva, Jefferson Post-Graduate Program in Electrical Engineering -COPELE Federal University of Campina Grande UFCG Campina Grande Brazil Post-Graduate in Electrical Engineering PPGEE Federal Institute of Paraiba João Pessoa Brazil

ISBN: (纸本)9781509033027

In this paper is presented a new printed monopole antenna, bio-inspired by jasmine flower, that meets the Federal Communications Commission parameters for ultra-wideband systems. The design of the printed monopole antenna in jasmine flower has developed from a printed monopole antenna with circular geometry, with comparison results. The measured results of bio-inspired antenna in the jasmine flower showed compatibility with the parameters required by the FCC for ultra-wideband technology. It obtained bandwidth of 9.75 GHz, half-power beamwidth of 148 degrees, omnidirectional radiation pattern, gain of 5.99 dBi, power spectral density below -41.3 dBm across the bandwidth of ultra-wideband technology, small pulse distortion, and constant group delay, with variations of less than 2ns. © 2016 IEEE.

关键词： Bandwidth

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An ontology-driven framework to support scenario representation in a 3D operator training simulator 4

An ontology-driven framework to support scenario representat...

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4th International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SIMULTECH 2014

作者： Filho, Flávio Torres de Fátima Queiroz Vieira, Maria Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Campina Grande Brazil Department of Electrical Engineering Federal University of Campina Grande Campina Grande Brazil

ISBN: (纸本)9789897580383

This paper presents a framework to support the development of three-dimensional virtual scenarios for an operator training simulator for electrical systems. Given the need to represent a variety of scenarios of interest, this can be an effort and time consuming task. The proposed framework promotes a systematic approach when building scenarios and is supported by tools from the ontology-based domain. An editing tool is also under construction. As it will be discussed in the paper, this approach resulted in the simplification of the scenario building process which is achieved by interchanging descriptions at different levels of abstraction. The descriptions concern the situation to be represented;plant objects' representation, both visual and behavioural, the latter represented as Coloured Petri Nets (CPN) models. © 2014 SciTePress. All rights reserved.

关键词： Ontology

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Two-phase open-end winding induction motor drive using improved current source inverter 9

Two-phase open-end winding induction motor drive using impro...

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9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017

作者： De Costa, Louelson A.L.A.C. Vitorino, Montiê A. Braga-Filho, Edgar R. Corrêa, Maurício B.R. Fernandes, Darlan A. Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Brazil Campina Grande - PB Brazil Joao Pessoa - PB Brazil

ISBN: (数字)9781509029983

ISBN: (纸本)9781509029983

In this work it is presented a two-phase open-end winding induction motor (IM) driven by an improved current source inverter (CSI). The proposed inverter has independent full quadrant operation, lower DC-link current value, high magnetics power density, 25% more efficient and high AC output voltage waveform quality compared to conventional CSI solutions. A back-to-back AC-DC-AC current source converter is used to drive the two-phase open-end winding IM, where in the AC-DC portion it is used a conventional three-phase three-leg rectifier, and the proposed two-phase inverter is used in the DC-AC portion. The two-phase IM model is also presented. Two motor drive methods for the improved CSI are used: Volts/Hertz and modified q-axis indirect flux oriented control. Simulation and experimental results are provided in order to validate the theoretical approach. © 2017 IEEE.

关键词： Induction motors

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Low-power energy conversion systems with two-phase PM machine and a rectifier with reduced number of controlled switches

Low-power energy conversion systems with two-phase PM machin...

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作者： Jacobina, Cursino B. Melo, Victor F.M.B. Da Bahia, Filipe A.C. Da Silva, Italo Roger F.M.P. Electrical Engineering Department Federal University of Campina Grande - UFCG Campina Grande Paraíba Brazil Post-Graduate Program in Electrical Engineering - PPgEE - COPELE UFCG Brazil

ISBN: (纸本)9781479956982

This paper presents two energy conversion systems with two-phase permanent magnet (PM) machine and a rectifier with reduced number of controlled switches. The topologies are conceived with the purpose of converting wind energy into electrical energy (i.e., a wind energy conversion system (WECS)) for low power applications. Compared with some three-phase generation systems with reduced number of controlled switches, the proposed topologies permit obtaining sinusoidal controlled machine currents, reducing dc-link voltage and dq currents low harmonic distortion. © 2014 IEEE.

关键词： Topology

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Multilevel Single-Phase Four-Leg AC-DC-AC Converter 12

Multilevel Single-Phase Four-Leg AC-DC-AC Converter

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12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020

作者： Rodrigues, Phelipe L. S. Jacobina, Cursino B. Lima, Antonio M. N. Post-Graduate Program in Electrical Engineering - PPgEE - Copele Paraíba58429-900 Brazil Department of Electrical Engineering Campina Grande Paraíba58429-900 Brazil

ISBN: (纸本)9781728158266

This paper presents a single-phase four-leg ac-dc-ac converter, with one leg shared by the grid side and the load side. The proposed topology can generate input and output voltages with seven levels, presenting reduced harmonic distortion, in addition to using reduced voltage switches. The space-vector pulsewidth modulation strategy (SV-PWM), the control technique, the system model, and a comparison with a three-leg topology will be presented. As for performance comparison parameters, harmonic distortion in currents and voltages, the average switching frequency, and semiconductor losses will be used. The topology was simulated and assembled in the laboratory to obtain experimental results. © 2020 IEEE.

关键词： Topology

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Dual Vienna Rectifiers with a Single Dc-link for Wind Energy Conversion System Applications 12

Dual Vienna Rectifiers with a Single Dc-link for Wind Energy...

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12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020

作者： Monteiro, Amanda P. Jacobina, Cursino B. Bahia, Filipe A. C. Sousa, Reuben P. R. Post-Graduate Program in Electrical Engineering PPgEE/COPELE Campina Grande Paraíba58429-900 Brazil Salvador Bahia40210-630 Brazil

ISBN: (纸本)9781728158266

In this paper, dual Vienna rectifiers are proposed for Wind Energy Conversion System (WECS) applications with Open-End Winding (OEW) Permanent Magnet Synchronous Generator (PMSG). Due to the reduced number of controlled switches, the proposed topologies have reduced costs and high reliability. Besides, they provide a better power quality using the same number of controlled switches than conventional structures presented in the literature, making them very attractive options for industry applications. The system model, space vector modulation, and control strategy are given. Simulation results are provided in order to validate their performance and feasibility. © 2020 IEEE.

关键词： Vector spaces

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