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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

ANÁLISE COMPARATIVA DE MÉTODOS DE PREVISÃO DE SÉRIES TEMPORAIS ATRAVÉS DE MODELOS ESTATÍSTICOS E REDE NEURAL ARTIFICIAL. / COMPARATIVE ANALYSIS OF TIME SERIES FORECASTING METHODS THROUGH STATISTICAL MODELS AND ARTIFICIAL NEURAL NETWORKS.

Sousa, Ana Paula de 09 March 2012 (has links)
Made available in DSpace on 2016-08-10T10:40:27Z (GMT). No. of bitstreams: 1 ANA PAULA DE SOUSA.pdf: 965882 bytes, checksum: a3647999f994441f4537855527b52292 (MD5) Previous issue date: 2012-03-09 / The objective of this study was to compare statistical methods and artificial intelligence to the problem of time series forecasting using Holt-Winters, Box-Jenkins and the Elman neural network. The models were used to predict one step ahead of the price of ethanol in the state of Goias and compared using measures of specific errors. At the end, the results indicated that all three techniques were competitive in terms of predicting one step ahead especially the statistical models appeared to be the most suitable methods in terms of balance between performance and complexity. / O objetivo deste trabalho foi comparar os métodos de estatística e de inteligência artificial para o problema da previsão de séries temporais através de Holt-Winters, Box- Jenkins e a rede neural de Elman. Os modelos foram utilizados para previsão um passo a frente dos preços do etanol no estado de Goiás e comparados através medidas de erros específicas. Ao final, os resultados indicaram que todos os métodos se mostraram competitivos em termos de predição um passo à frente, destacando-se os modelos estatísticos como os mais adequados em termos de parcimônia entre desempenho e complexidade.

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