Banca de DEFESA: HENRIQUE LUIZ VONI GIULIANI

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : HENRIQUE LUIZ VONI GIULIANI
DATA : 05/04/2022
HORA: 09:00
LOCAL: por participação remota
TÍTULO:

Ensemble Machine-Learning Applied to Brain-Computer Interfaces

PÁGINAS: 90
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Ciência da Computação
SUBÁREA: Metodologia e Técnicas da Computação
ESPECIALIDADE: Sistemas de Informação
RESUMO:

Brain-Computer Interfaces (BCI) are robust systems that incorporate techniques from different scientific fields in order to perform the translation of brain signals into external commands. Among these techniques, one can highlight machine learning algorithms, which are responsible for recognizing patterns and extracting relevant information from data to correctly perform the classification task. However, since the performance of these algorithms also depends on data complexity, the conception of a multi-user BCI system is still a challenging task, given the high intra/inter-user variability that is faced in this scenario. In this case, ensemble learning can provide promising results, considering that each base classifier acts as an expert with a subset of the dataset. Thus, in this work, we investigate the use of different ensemble structures classically disseminated in the literature to classify brain signals of different subjects. As the main contribution to this topic, we propose a new type of ensemble: the gaussian kernel-based Mixture of Experts (GKME). Experimental results shows that GKME can reach a better performance when compared to classic ensemble algorithms with a significantly lower number of experts, achieving a mean accuracy of 95.33% when evaluating subjects separately and 85.14% in the cross-subject scenario.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 3008017 - DENIS GUSTAVO FANTINATO
Membro Titular - Examinador(a) Interno ao Programa - 1676329 - RAPHAEL YOKOINGAWA DE CAMARGO
Membro Titular - Examinador(a) Externo ao Programa - 1544392 - ALINE DE OLIVEIRA NEVES PANAZIO
Membro Titular - Examinador(a) Externo à Instituição - SARAH NEGREIROS DE CARVALHO LEITE - UFOP
Membro Suplente - Examinador(a) Interno ao Programa - 1932365 - FABRICIO OLIVETTI DE FRANCA