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Identificação dos aparelhos eléctricos domésticos
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ISBN10: 6202416491
ISBN13: 9786202416498
Publisher: Edicoes Nosso Conhecimento
Published: Aug 15 2025
Pages: 84
Weight: 0.27
Height: 0.20 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786202416498
Publisher: Edicoes Nosso Conhecimento
Published: Aug 15 2025
Pages: 84
Weight: 0.27
Height: 0.20 Width: 6.00 Depth: 9.00
Language: Portuguese
O objetivo deste trabalho é propor um novo sistema de identificação de aparelhos eléctricos domésticos. A nossa primeira contribuição é propor um sistema de identificação baseado na utilização de parâmetros estatÃsticos de harmónicos e na aplicação do classificador KNN combinado com o método da regra de votação. Os resultados obtidos mostram que a extração de 500 parâmetros, baseada na estimativa da média estatÃstica e do desvio padrão, combinada com a classificação KNN e a estratégia de regra de votação, dá a melhor taxa de classificação CR de 94,97%. A nossa segunda contribuição consiste em reduzir a dimensionalidade utilizando uma representação compacta dos parâmetros (denominada DWE) que se baseia na estimativa da média e do desvio padrão da energia calculada em cada nÃvel de decomposição diádica da análise wavelet. Dois descritores denominados LWE e WCC são também extraÃdos desta análise, aplicando, respetivamente, o logaritmo da energia total e a transformada discreta do cosseno. Os resultados mostram que o descritor WCC dá um CR máximo de 98,13%.
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