The aim of this paper is to introduce a biologically inspired approach that can automatically generate Deep Neural networks with good prediction capacity, smaller error and large tolerance to noises. In order to do this, three biological paradigms were used: Genetic Algorithm (GA), Lindenmayer System and Neural Networks (DNNs). The final sections of the paper present some experiments aimed at investigating the possibilities of the method in the forecast the price of energy in the Brazilian market. The proposed model considers a multi-step ahead price prediction (12, 24, and 36 weeks ahead). The results for MLP and LSTM networks show a good ability to predict peaks and satisfactory accuracy according to error measures comparing with other methods.
This paper proposes a hybrid approach for shortterm energy price prediction. This approach combines a genetic algorithm (GA) that evolves individuals represented by a set of production rules, these rules are extracted from chromosomes and generate the genotypes, which are mapped to phenotypes(Deep Neural Networks). The Artificial Neural Networks (ANNs) are then trained and then validated, and the prediction tests are carried out. The genotypes are classified by the performances of their ANNs in prediction and the GA selects the best individuals for mutation and crossover operations, which provide a new population. The previous steps are repeated through n generations. The result is an optimized neural network architecture for energy price prediction. The results show good ability to predict spikes and satisfactory accuracy according to error measures, delivering an accurate prediction. Finally, the results are compared with traditional techniques.
As Redes Neurais Artificiais (RNAs) tem sido utilizadas nas soluções de variados problemas, dentre eles, os que envolvem tomada de decisões. Neste escopo, o objetivo desta pesquisa é apresentar uma ferramenta que dê suporte ao processo de decisão para seleção de cultivares de vinho e avaliação de carros, por meio da utilização de RNAs multilayer perceptron, profundas e recorrentes. Verificando-se sua eficácia e a melhor convergência, por meio do Modelo de Validação Cruzada. Os resultados elencados indicam a eficiência da técnica, para ambos os problemas, haja vista que a capacidade de generalização das RNAs testadas para o dataset wine foi em média de 85,58% utilizando a arquitetura de 3 camadas, 86,58% para a rede profunda e 93,53% para a rede recorrente, e para o dataset car evaluation foi em média de 93,71% utilizando a rede recorrente.
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