Estudo sobre Métricas para Definir Reputação do Autor de Comentários em Sites de Vendas de Produtos
Palavras-chave:
Reputação do autor, Mineração de opinião, Redes neurais artificiais.Resumo
Conhecer a reputação do autor de textos opinativos na Web é de suma importância para o desenvolvimento de sistemas baseados em dados abertos. Este artigo apresenta um estudo sobre medidas usadas no processo de avaliação da reputação do autor em sites de vendas de produtos. Realizou-se dois experimentos com as redes neurais Multilayer Perceptron (MLP) e Radial Basis Function (RBF), sendo que a rede MLP obteve melhor desempenho. Em um terceiro experimento, comparou-se a abordagem TOP(X) original, usada para inferir os melhores comentários, com um novo modelo que utiliza rede MLP na dimensão da reputação do autor. Considerando os comentários excelentes e bons, a nova abordagem apresentou resultados significativamente superiores. Adicionalmente, foi realizado um quarto experimento com outros algoritmos de aprendizagem de máquina (AM) para observar o comportamento dos dados.Downloads
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