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Previous issue date: 2012-02-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The Brain-Computer Interfaces (BCI) have as main purpose to establish a
communication path with the central nervous system (CNS) independently from the standard
pathway (nervous, muscles), aiming to control a device. The main objective of the current
research is to develop an off-line BCI that separates the different EEG patterns resulting from
strictly mental tasks performed by an experimental subject, comparing the effectiveness of
different signal-preprocessing approaches. We also tested different classification approaches:
all versus all, one versus one and a hierarchic classification approach. No preprocessing
techniques were found able to improve the system performance. Furthermore, the hierarchic
approach proved to be capable to produce results above the expected by literature / As interfaces c?rebro-computador (ICC) t?m como objetivo estabelecer uma via de
comunica??o com o sistema nervoso central (SNC) que seja independente das vias padr?o
(nervos, m?sculos), visando o controle de algum dispositivo. O objetivo principal da presente
pesquisa ? desenvolver uma ICC off-line que separe os diferentes padr?es de EEG resultantes
de tarefas puramente mentais realizadas por um sujeito experimental, comparando a efic?cia
de diferentes abordagens de pr?-processamento do sinal. Tamb?m foram testadas diferentes
abordagens de classifica??o: todos contra todos, um contra um e uma abordagem hier?rquica
de classifica??o. N?o foram encontradas t?cnicas de pr?-processamento que melhorem os
resultados do sistema. Al?m disso, a abordagem hier?rquica sugerida mostrou-se capaz de
produzir resultados acima do padr?o esperado pela literatura
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15432 |
| Date | 24 February 2012 |
| Creators | Barbosa, Andr? Freitas |
| Contributors | CPF:01207607703, http://lattes.cnpq.br/8556144121380013, D?ria Neto, Adri?o Duarte, CPF:10749896434, http://lattes.cnpq.br/1987295209521433, Pereira J?nior, Ant?nio, CPF:25715330297, http://lattes.cnpq.br/1402289786010170, Soares, Heliana Bezerra, CPF:80674585453, Bresolin, Adriano de Andrade, CPF:66195136972, http://lattes.cnpq.br/8862209760730631, Guerreiro, Ana Maria Guimar?es |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia El?trica, UFRN, BR, Automa??o e Sistemas; Engenharia de Computa??o; Telecomunica??es |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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