Now showing items 1-20 of 76

    • General overlap functions 

      Miguel Turullols, Laura de Upna Orcid; Gomez, Daniel; Tinguaro, Javier; Montero, Javier; Bustince Sola, Humberto Upna Orcid; Pereira Dimuro, Graçaliz Upna Orcid; Sanz, Jose Antonio (Elsevier, 2019)   Artículo / Artikulua
      As a generalization of bivariate overlap functions, which measure the degree of overlapping (intersection for non-crisp sets) of n different classes, in this paper we introduce the concept of general overlap functions. We ...
    • Application of two different methods for extending lattice-valued restricted equivalence functions used for constructing similarity measures on L-fuzzy sets 

      Palmeira, Eduardo S.; Bedregal, Benjamin Upna; Bustince Sola, Humberto Upna Orcid; Paternain Dallo, Daniel Upna Orcid; Miguel Turullols, Laura de Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      Based on previous investigations, we have proposed two different methods to extend lattice-valued fuzzy connectives (t-norms, t-conorms, negations and implications) and other related operators, considering a generalized ...
    • Multivalued contexts associated with criteria 

      Alcalde, Cristina; Burusco Juandeaburre, Ana Upna Orcid (Taylor & Francis, 2018)   Artículo / Artikulua  OpenAccess
      We are interested in the study of L-fuzzy contexts taking into account different criteria. These contexts arise when we want to analyze the relationship between objects and attributes from different points of view. ...
    • Convolution lattices 

      Miguel Turullols, Laura de Upna Orcid; Bustince Sola, Humberto Upna Orcid; Baets, Bernard de (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      We propose two convolution operations on the set of functions between two bounded lattices and investigate the algebraic structure they constitute, in particular the lattice laws they satisfy. Each of these laws requires ...
    • New measures for comparing matrices and their application to image processing 

      Sesma Sara, Mikel Upna Orcid; Miguel Turullols, Laura de Upna Orcid; Pagola Barrio, Miguel Upna Orcid; Burusco Juandeaburre, Ana Upna Orcid; Mesiar, Radko; Bustince Sola, Humberto Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      In this work we present the class of matrix resemblance functions, i.e., functions that measure the difference between two matrices. We present two construction methods and study the properties that matrix resemblance ...
    • Online detection of pathological TCP flows with retransmissions in high-speed networks 

      Miravalls-Sierra, Eduardo; Muelas, David; Ramos, Javier; López de Vergara, Jorge E.; Morató Osés, Daniel Upna Orcid; Aracil Rico, Javier Upna (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      Online Quality of Service (QoS) assessment in high speed networks is one of the key concerns for service providers, namely to detect QoS degradation on-the-fly as soon as possible and avoid customers’ complaints. In this ...
    • Pointwise aggregation of maps: its structural functional equation and some applications to social choice theory 

      Miguel Turullols, Laura de Upna Orcid; Campión Arrastia, María Jesús Upna Orcid; Candeal, Juan Carlos; Induráin Eraso, Esteban Upna Orcid; Paternain Dallo, Daniel Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      We study a structural functional equation that is directly related to the pointwise aggregation of a finite number of maps from a given nonempty set into another. First we establish links between pointwise aggregation and ...
    • Type-2 fuzzy entropy-sets 

      Miguel Turullols, Laura de Upna Orcid; Santos, Helida; Sesma Sara, Mikel Upna Orcid; Bedregal, Benjamin Upna; Jurío Munárriz, Aránzazu Upna Orcid; Bustince Sola, Humberto Upna Orcid (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      The final goal of this study is to adapt the concept of fuzzy entropy of De Luca and Termini to deal with Type-2 Fuzzy Sets. We denote this concept Type-2 Fuzzy Entropy-Set. However, the construction of the notion of ...
    • An algorithm for group decision making using n -dimensional fuzzy sets, admissible orders and OWA operators 

      Miguel Turullols, Laura de Upna Orcid; Sesma Sara, Mikel Upna Orcid; Elkano Ilintxeta, Mikel Upna Orcid; Asiain Ollo, María José Upna; Bustince Sola, Humberto Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      In this paper we propose an algorithm to solve group decision making problems using n -dimensional fuzzy sets, namely, sets in which the membership degree of each element to the set is given by an in- creasing tuple of n ...
    • Linking mathematical morphology and L-fuzzy concepts 

      Alcalde, Cristina; Burusco Juandeaburre, Ana Upna Orcid; Bustince Sola, Humberto Upna Orcid; Fuentes González, Ramón Upna Orcid; Sesma Sara, Mikel Upna Orcid (World Scientific, 2017)   Artículo / Artikulua  OpenAccess
      In this paper we study the relation between L-fuzzy morphology and L-fuzzy concepts over complete lattices. In particular, we show how the erosion and dilation operators of the former can be understood in terms of the ...
    • Fuzzy concept lattices and fuzzy relation equations in the retrieval processing of images and signals 

      Alcalde, Cristina; Burusco Juandeaburre, Ana Upna Orcid; Díaz Moreno, Juan Carlos; Medina, Jesús (World Scientific, 2017)   Artículo / Artikulua  OpenAccess
      This paper considers the introduced relations between fuzzy property-oriented concept lattices and fuzzy relation equations, on the one hand, and mathematical morphology, on the other hand, in the retrieval processing ...
    • Some characterizations of lattice OWA operators 

      Miguel Turullols, Laura de Upna Orcid; Paternain Dallo, Daniel Upna Orcid; Lizasoain Iriso, María Inmaculada Upna Orcid; Ochoa Lezaun, Gustavo Upna Orcid; Bustince Sola, Humberto Upna Orcid (World Scientific Publishing Company, 2017)   Artículo / Artikulua  OpenAccess
      Ordered Weighted Averaging (OWA) operators are a family of aggregation which fusion data. If the data are real numbers, then OWA operators can be characterized either as an special kind of Choquet integral or simply as an ...
    • Binary relations coming from solutions of functional equations: orderings and fuzzy subsets 

      Campión Arrastia, María Jesús Upna Orcid; Miguel Turullols, Laura de Upna Orcid; García Catalán, Olga Raquel Upna; Induráin Eraso, Esteban Upna Orcid; Abrísqueta Usaola, Francisco Javier Upna (World Scientific Publishing Company, 2017)   Artículo / Artikulua  OpenAccess
      We analyze the main properties of binary relations, defined on a nonempty set, that arise in a natural way when dealing with real-valued functions that satisfy certain classical functional equations on two variables. We ...
    • A decision tree based approach with sampling techniques to predict the survival status of poly-trauma patients 

      Sanz Delgado, José Antonio Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid; Bustince Sola, Humberto Upna Orcid; Gradín Purroy, Carlos; Belzunegui Otano, Tomás Upna Orcid (Atlantis Press, 2017)   Artículo / Artikulua  OpenAccess
      Survival prediction of poly-trauma patients measure the quality of emergency services by comparing their predictions with the real outcomes. The aim of this paper is to tackle this problem applying C4.5 since it achieves ...
    • TBDClust: time-based density clustering to enable free browsing of sites in pay-per-use mobile Internet providers 

      Torres García, Luis Miguel Upna; Magaña Lizarrondo, Eduardo Upna Orcid; Morató Osés, Daniel Upna Orcid; García-Jiménez, Santiago Upna Orcid; Izal Azcárate, Mikel Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      The World Wide Web has evolved rapidly, incorporating new content types and becoming more dynamic. The contents from a website can be distributed between several servers, and as a consequence, web traffic has become ...
    • Evolution in time of L-fuzzy context sequences 

      Alcalde, Cristina; Burusco Juandeaburre, Ana Upna Orcid; Bustince Sola, Humberto Upna Orcid; Jurío Munárriz, Aránzazu Upna Orcid; Sanz Delgado, José Antonio Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      In this work, we consider a complete lattice L and we study L-fuzzy context sequences which represent the evolution in time of an L-fuzzy context. To carry out this study, in the first part of the paper, we consider n-ary ...
    • Fuzzy rule-based classification systems for multi-class problems using binary decomposition strategies: on the influence of n-dimensional overlap functions in the fuzzy reasoning method 

      Elkano Ilintxeta, Mikel Upna Orcid; Galar Idoate, Mikel Upna Orcid; Sanz Delgado, José Antonio Upna Orcid; Bustince Sola, Humberto Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Multi-class classification problems appear in a broad variety of real-world problems, e.g., medicine, genomics, bioinformatics, or computer vision. In this context, decomposition strategies are useful to increase the ...
    • A framework for radial data comparison and its application to fingerprint analysis 

      Marco Detchart, Cedric Upna Orcid; Cerrón González, Juan Upna; Miguel Turullols, Laura de Upna Orcid; López Molina, Carlos Upna Orcid; Bustince Sola, Humberto Upna Orcid; Galar Idoate, Mikel Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      This work tackles the comparison of radial data, and proposes comparison measures that are further applied to fingerprint analysis. First, we study the similarity of scalar and non-scalar radial data, elaborated on previous ...
    • Interval-valued Atanassov intuitionistic OWA aggregations using admissible linear orders and their application to decision making 

      Miguel Turullols, Laura de Upna Orcid; Bustince Sola, Humberto Upna Orcid; Pekala, Barbara; Bentkowska, Urszula; Silva, Ivanoska da; Bedregal, Benjamin Upna; Mesiar, Radko; Ochoa Lezaun, Gustavo Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      Based on the definition of admissible order for interval-valued Atanassov intuitionistic fuzzy sets, we study OWA operators in these sets distinguishing between the weights associated to the membership and those associated ...
    • Unbalanced interval-valued OWA operators 

      Miguel Turullols, Laura de Upna Orcid; Bustince Sola, Humberto Upna Orcid; Barrenechea Tartas, Edurne Upna Orcid; Pagola Barrio, Miguel Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid (Springer Berlin Heidelberg, 2016)   Artículo / Artikulua  OpenAccess
      In this work, we introduce a new class of functions defned on the interval-valued setting. These functions extend classical OWA operators but allow for diferent weighting vectors to handle the lower bounds and the ...