2007, Vol. XIV, núm. 3

Sumari

  • Approximation of proximities by aggregating T-indistinguishability operators 

    Garmendia, L.; Recasens, J. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
    Article
    Accés obert
    For a continuous Archimedean t-norm T a method to approximate a proximity relation R (i.e. a reflexive and symmetric fuzzy relation) by a T-transitive one is provided. It consists of aggregating the transitive closure R ...

  • On the order type L-valued relations on L-powersets 

    Uljane, I. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
    Article
    Accés obert
    The research in the field of the so called Fuzzy Mathematics can be conditionally devided into two mainstreams: the first one emphasizes on the study of different fuzzy structures (topological, algebraic, analytical, etc.) ...

  • Advanced inference in fuzzy systems by rule base compression 

    Gegov, N.; Gobalakrishnan, N. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
    Article
    Accés obert
    This paper describes a method for rule base compression of fuzzy systems. The method compresses a fuzzy system with an arbitrarily large number of rules into a smaller fuzzy system by removing the redundancy in the fuzzy ...

  • Towards automatic modeling of economic texts 

    Dvořák, Antonin; Novák, Vilém (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
    Article
    Accés obert
    In this paper, we present an application of perception-based logical deduction in the modeling of an economic analysis given in natural language. We use fuzzy IF-THEN rules and the theory of evaluative linguistic expressions ...

  • On completeness results for predicate lukasiewicz, product, gödel and nilpotent minimum logics expanded with truth-constants 

    Esteva Massaguer, Francesc; Godo, L.; Noguera, C. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
    Article
    Accés obert
    In this paper we deal with generic expansions of first-order predicate logics of some left-continuous t-norms with a countable set of truth-constants. Besides already known results for the case of Lukasiewicz logic, we ...

  • Mixed integer programming, general concept inclusions and fuzzy description logics 

    Straccia, U.; Bobillo, F. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2007)
    Article
    Accés obert
    Fuzzy Description Logics (fuzzy DLs) have been proposed as a language to describe structured knowledge with vague concepts. In [19], a solution based on Mixed Integer Linear Programming has been proposed to deal with ...