2002, Vol. IX, Núm. 1

Summary

  • Propositional calculus for adjointness lattices 

    Morsi, Nehad N.; Aziz Mohammed, E. A.; El-Zekey, M. S. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2001)
    Article
    Open Access
    Recently, Morsi has developed a complete syntax for the class of all adjointness algebras $\left( L,\leq ,A,K,H\right) $. There, $\left( L,\leq \right) $ is a partially ordered set with top element $1$, $K$ is a conjunction ...

  • A fuzzy and intuitionistic fuzzy account of the Liar paradox 

    Nikolov, Nicolai G. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2002)
    Article
    Open Access
    The Liar paradox, or the sentence "What I am now saying is false." and its various guises have been attracting the attention of logicians and linguists since ancient times. A commonly accepted treatment of the Liar ...

  • Fuzzy Markov chains: uncertain probabilities 

    Buckley, James J.; Eslami, Esfandiar (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2002)
    Article
    Open Access
    We consider finite Markov chains where there are uncertainties in some of the transition probabilities. These uncertainties are modeled by fuzzy numbers. Using a restricted fuzzy matrix multiplication we investigate the ...

  • Scalar cardinalities for divisors of a fuzzy cardinality 

    Casasnovas Casasnovas, Jaime (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2002)
    Article
    Open Access
    The cardinality of a finite fuzzy set can be defined as a scalar or a fuzzy quantity. The fuzzy cardinalities are represented by means the generalized natural numbers, where it is possible to define arithmetical operations, ...

  • Learning imprecise semantic concepts from image databases 

    Sánchez Fernández, Daniel; Chamorro Martínez, Jesús (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2002)
    Article
    Open Access
    In this paper we introduce a model to represent high-level semantic concepts that can be perceived in images. The concepts are learned and represented by means of a set of association rules that relate the presence of ...

  • Fuzzy multicriteria decision making applied to the strategic plan of Valencia 

    Nieto Morote, Ana Mª; Ruz Vila, Francisco (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2002)
    Article
    Open Access
    We present a fuzzy multicriteria decision making to get the ranking of several projects presented to the major council of Valencia whose final aim is to define the future urbanistic structure of the city. This technique ...

  • Fuzzy controller applications in stand-alone photovoltaic systems 

    Cañada Bago, Joaquín; García Galán, Sebastián; Aguilera García, Jorge; Velasco Pérez, Juan Ramón; Magdalena Layos, Luis (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2002)
    Article
    Open Access
    One of foremost problems in stand-alone photovoltaic systems consists on the election of a strategy for charge controllers. The charge controllers main function is the accumulation system protection, and this leads ...

  • Flexible information retrieval: some research trends 

    Pasi, Gabriella (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2002)
    Article
    Open Access
    In this paper some research trends in the field of Information Retrieval are presented. The focus is on the definition of flexible systems, i.e. systems that can represent and manage the vagueness and uncertainty which is ...