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  • Evolutionaty training for dynamical recurrent neural networks: an application in finantial time series prediction 

    Delgado Calvo-Flores, Miguel; Pegalajar Jiménez, Mª Carmen; Pegalajar Cuéllar, Manuel (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2006)
    Article
    Accés obert
    Theoretical and experimental studies have shown that traditional training algorithms for Dynamical Recurrent Neural Networks may suffer of local optima solutions, due to the error propagation across the recurrence. In the ...
  • A fuzzy-evolutionary seller agent for an automatic negotiation framework on e-commerce 

    Manjacavas Ortíz, Ramón; Castro Sánchez, José Jesús; Moreno García, Juan (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2006)
    Article
    Accés obert
    The business achievement via e-commerce is getting more important at the present time. E-commerce implies several activities. One of the most significant activity is the consummation of negotiations between sellers and ...
  • Fuzzy neural network approach to fuzzy polynomial 

    Abbasbandy, Saeid; Otadi, M (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2006)
    Article
    Accés obert
    In this paper, an architecture of fuzzy neural networks is proposed to find a real root of a dual fuzzy polynomial (if exists) by introducing a learning algorithm. We proposed a learning algorithm from the cost function ...
  • A short note on lattices allowing disjunctive reasoning 

    Trillas i Gay, Enric; Renedo, Eloy; Alsina Català, Claudi (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2006)
    Article
    Accés obert
    This short note shows that the scheme of disjunctive reasoning, a or b, not b : a, does not hold neither in proper ortholattices nor in proper de Morgan algebras. In both cases the scheme, once translated into the inequality ...