Recent Submissions

  • A decision tree based approach with sampling techniques to predict the survival status of poly-trauma patients 

    Sanz Delgado, José Antonio Upna; Fernández Fernández, Francisco Javier Upna; Bustince Sola, Humberto Upna; Gradin Purroy, Carlos; Belzunegui Otano, Tomás Upna (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 ...
  • Paired structures in knowledge representation 

    Montero, Javier; Bustince Sola, Humberto Upna; Pagola Barrio, Miguel Upna; Fernández Fernández, Francisco Javier Upna; Barrenechea Tartas, Edurne Upna (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
    In this position paper we propose a consistent and unifying view to all those basic knowledge representation models that are based on the existence of two somehow opposite fuzzy concepts. A number of these basic models can ...
  • Applications of finite interval-valued hesitant fuzzy preference relations in group decision making 

    Pérez Fernández, Raúl; Alonso, Pedro; Bustince Sola, Humberto Upna; Díaz, Irene; Montes, S. (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
    The main purpose of this paper is to present the twofold group decision making problem, which is a new point of view of the group decision making problem where several experts and criteria can be considered at the same ...
  • Optical images-based edge detection in Synthetic Aperture Radar images 

    Silva Junior, Gilberto P.; Frery, Alejandro C.; Bustince Sola, Humberto Upna; Barrenechea Tartas, Edurne Upna; Marco Detchart, Cedric Upna (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
    We address the issue of adapting optical images-based edge detection techniques for use in Polarimetric Synthetic Aperture Radar (PolSAR) imagery. We modify the gravitational edge detection technique (inspired by the Law ...
  • Consensus image method for unknown noise removal 

    González Jaime, Luis; Kerre, Etienne E.; Nachtegael, Mike; Bustince Sola, Humberto Upna (Elsevier, 2014)   Artículo / Artikulua  OpenAccess
    Noise removal has been, and it is nowadays, an important task in computer vision. Usually, it is a previous task preceding other tasks, as segmentation or reconstruction. However, for most existing denoising algorithms the ...
  • Growth in the number of references in engineering journal papers during the 1972-2013 period 

    Úcar Marqués, Iñaki; López Fernandino, Felipe; Rodríguez Ulibarri, Pablo Upna; Sesma Sánchez, Laura Upna; Urrea Micó, Verónica; Sevilla Moróder, Joaquín Upna (Springer, 2014)   Artículo / Artikulua  OpenAccess
    The number of references per paper, perhaps the best single index of a journal’s scholarliness, has been studied in different disciplines and periods. In this paper we present a four decade study of eight engineering ...
  • General overlap functions 

    Miguel Turullols, Laura de Upna; Gomez, Daniel; Tinguaro, Javier; Montero, Javier; Bustince Sola, Humberto Upna; Pereira Dimuro, Graçaliz Upna; 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 ...
  • Join and meet operations for type-2 fuzzy sets with non-convex secondary memberships 

    Ruiz, Gonzalo; Hagras, Hani; Pomares, Héctor; Rojas, Ignacio; Bustince Sola, Humberto Upna (IEEE, 2016)   Artículo / Artikulua  OpenAccess
    In this paper we will present two theorems for the join and meet operations for general type-2 fuzzy sets with arbitrary secondary memberships, which can be non-convex and/or non-normal type-1 fuzzy sets. These results ...
  • A historical account of types of fuzzy sets and their relationships 

    Bustince Sola, Humberto Upna; Barrenechea Tartas, Edurne Upna; Pagola Barrio, Miguel Upna; Fernández Fernández, Francisco Javier Upna; Xu, Zeshui; Bedregal, Benjamin Upna; Montero, Javier; Hagras, Hani; Herrera, Francisco; Baets, Bernard de (IEEE, 2016)   Artículo / Artikulua  OpenAccess
    In this work we review the definition and basic properties of the different types of fuzzy sets that have appeared up to now in the literature. We also analyze the relationships between them and enumerate some of the ...
  • Interval type-2 fuzzy sets are generalization of interval-valued fuzzy sets: towards a wider view on their relationship 

    Bustince Sola, Humberto Upna; Fernández Fernández, Francisco Javier Upna; Hagras, Hani; Herrera, Francisco; Pagola Barrio, Miguel Upna; Barrenechea Tartas, Edurne Upna (IEEE, 2015)   Artículo / Artikulua  OpenAccess
    In this paper, we will present a wider view on the relationship between interval-valued fuzzy sets and interval type- 2 fuzzy sets where we will show that interval-valued fuzzy sets are a particular case of the interval ...
  • 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; 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 ...
  • 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; Morató Osés, Daniel Upna; García-Jiménez, Santiago Upna; Izal Azcárate, Mikel Upna (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 ...
  • New measures for comparing matrices and their application to image processing 

    Sesma Sara, Mikel Upna; Miguel Turullols, Laura de Upna; Pagola Barrio, Miguel Upna; Burusco Juandeaburre, Ana Upna; Mesiar, Radko; Bustince Sola, Humberto Upna (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 ...
  • Quantitative feedback control of multiple input single output systems 

    Rico Azagra, Javier; Gil Martínez, Montserrat; Elso Torralba, Jorge Upna (Hindawi, 2014)   Artículo / Artikulua  OpenAccess
    This paper presents a robust feedback control solution for systemswithmultiplemanipulated inputs and a singlemeasurable output. A structure of parallel controllers achieves robust stability and robust disturbance rejection. ...
  • Descubrimiento de conocimiento en bases de datos utilizando técnicas de morfología matemática borrosa 

    Frago Paños, Noé Natalio Upna; Fuentes González, Ramón Upna (Centro de Información Tecnológica, 2007)   Artículo / Artikulua  OpenAccess
    En este artículo se analiza el efecto, la utilidad y la interpretación de los filtros asociados a la Morfología Matemática Borrosa en procesos de Descubrimiento de Conocimiento en Bases de Datos. En particular se estudian ...
  • Convolution lattices 

    Miguel Turullols, Laura de Upna; Bustince Sola, Humberto Upna; 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 ...
  • Multivalued contexts associated with criteria 

    Alcalde, Cristina; Burusco Juandeaburre, Ana Upna (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. ...
  • Fuzzy concept lattices and fuzzy relation equations in the retrieval processing of images and signals 

    Alcalde, Cristina; Burusco Juandeaburre, Ana Upna; 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 ...
  • Linking mathematical morphology and L-fuzzy concepts 

    Alcalde, Cristina; Burusco Juandeaburre, Ana Upna; Bustince Sola, Humberto Upna; Fuentes González, Ramón Upna; Sesma Sara, Mikel Upna (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 ...
  • 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; Paternain Dallo, Daniel Upna; Miguel Turullols, Laura de Upna (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 ...

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