• 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 ...
    • New trends on the numerical representability of semiordered structures 

      Abrísqueta Usaola, Francisco Javier Upna; Campión Arrastia, María Jesús Upna Orcid; García Catalán, Olga Raquel Upna; Miguel Velasco, Juan Ramón de Upna Orcid; Estevan Muguerza, Asier Upna Orcid; Induráin Eraso, Esteban Upna Orcid; Zudaire Sarobe, Margarita Upna; Agud, L.; Candeal, Juan Carlos; Díaz, S.; Martinetti, D.; Montes Rodríguez, Susana; Gutiérrez García, J. (EUSFLAT, 2012)   Artículo / Artikulua  OpenAccess
      We introduce a survey, including the historical background, on di erent techniques that have recently been issued in the search for a characterization of the representability of semiordered structures, in the sense of ...
    • On capacity planning for the GMPLS network control plane 

      Morató Osés, Daniel Upna Orcid; Aracil Rico, Javier Upna; Fernández Palacios, Juan P.; González de Dios, Óscar; Lobo Poyo, Jesús F. (Springer US, 2008)   Artículo / Artikulua  OpenAccess
      This paper presents capacity planning rules for the control plane of all-optical networks featuring GMPLS and RSVP-TE as a connection setup protocol. As per RSVP standard, a refresh message mechanism is incorporated to ...
    • On completeness and direction in fuzzy relational systems 

      Burillo López, Pedro Upna; Fuentes González, Ramón Upna Orcid; González, L. (Universitat Politècnica de Catalunya, 1998)   Artículo / Artikulua  OpenAccess
      The concepts of bounded subset, complete subset and directed subset, which are well known in the context of partially ordered sets (X, ≤), are extended in order to become applicable, with coherence, in fuzzy relational ...
    • On contrast intensification operators and fuzzy equality relations 

      Burillo López, Pedro Upna; Fuentes González, Ramón Upna Orcid; González, L.; Marín Martínez, Ángel Upna (Universitat Politècnica de Catalunya, 2000)   Artículo / Artikulua  OpenAccess
      The class of contrast intensification operators is formally defined and its lattice structure studied. The effect of these operators in the referential classification derived from special kinds of fuzzy relations is also ...
    • On the intuitionistic fuzzy relations 

      Burillo López, Pedro Upna; Bustince Sola, Humberto Upna Orcid; Atanassov, Krassimir (Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1995)   Artículo / Artikulua  OpenAccess
      Intuitionistic fuzzy relations which generalize the already existing relations are introduced and their basic properties are shown.
    • 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 ...
    • Optical images-based edge detection in Synthetic Aperture Radar images 

      Silva Junior, Gilberto P.; Frery, Alejandro C.; Bustince Sola, Humberto Upna Orcid; Barrenechea Tartas, Edurne Upna Orcid; Marco Detchart, Cedric Upna Orcid (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 ...
    • Orderings in the referential set induced by intuitionistic fuzzy relation 

      Burillo López, Pedro Upna; Bustince Sola, Humberto Upna Orcid (Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1995)   Artículo / Artikulua  OpenAccess
      In this paper we present different orderings in the referential set induced by intuitionistic fuzzy relations of ordering. We can see how these induced orders justify the definition given of intuitionistic fuzzy antisymmetry ...
    • Overtaker binary relations on complete completely distributive lattices related to the level sets of the L-fuzzy sets 

      Núñez, A.; Burillo López, Pedro Upna; Fuentes González, Ramón Upna Orcid; González, L. (Universitat Politècnica de Catalunya, 1994)   Artículo / Artikulua  OpenAccess
      The class of overtaker binary relations associated with the order in a lattice is defined and used to generalize the representations of L-fuzzy sets by means of level sets or fuzzy points.
    • Paired structures in knowledge representation 

      Montero, Javier; Bustince Sola, Humberto Upna Orcid; Pagola Barrio, Miguel Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid; Barrenechea Tartas, Edurne Upna Orcid (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 ...
    • Parametric families of fuzzy consequence operators 

      Elorza Barbajero, Jorge Upna Orcid; Burillo López, Pedro Upna (Universitat Politècnica de Catalunya, 2004)   Artículo / Artikulua  OpenAccess
      In a previous paper we explored the notion of coherent fuzzy consequence operator. Since we did not know of any example in the literature of non-coherent fuzzy consequence operator, we also showed several families of such ...
    • A passive traffic algorithm for detecting unavailable periods in TCP services 

      Prieto Suárez, Iria Upna; Izal Azcárate, Mikel Upna Orcid; Magaña Lizarrondo, Eduardo Upna Orcid; Morató Osés, Daniel Upna Orcid (IARIA, 2015)   Artículo / Artikulua  OpenAccess
      This paper presents a simple passive algorithm to monitor service availability. The algorithm is based on packet counting over a passive traffic trace of a population of clients accessing servers of interest. The major ...
    • 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 ...
    • Posibles nuevas vías de investigación en teoría de la comunicación a través de modelos matemáticos: análisis topológico 

      Corres Sanz, Jesús María Upna Orcid; Burillo López, Pedro Upna (Centro de Investigaciones Sociológicas, 1978)   Artículo / Artikulua  OpenAccess
      Uno de los pocos puntos en los que los metodólogos de las ciencias sociales están de acuerdo es el divorcio existente entre trabajo teórico y trabajo metodológico en las prácticas sociales concretas. Por otro lado, para ...
    • Positron emission tomography image segmentation based on atanassov's intuitionistic fuzzy sets 

      Couto, Pedro; Bento, Telmo; Bustince Sola, Humberto Upna Orcid; Melo-Pinto, Pedro (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      In this paper, we present an approach to fully automate tumor delineation in positron emission tomography (PET) images. PET images play a major role in medicine for in vivo imaging in oncology (PET images are used to ...
    • Pre-aggregation functions: construction and an application 

      Lucca, Giancarlo; Sanz Delgado, José Antonio Upna Orcid; Pereira Dimuro, Graçaliz Upna Orcid; Bedregal, Benjamin Upna Orcid; Mesiar, Radko; Kolesárová, Anna; Bustince Sola, Humberto Upna Orcid (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      In this work we introduce the notion of preaggregation function. Such a function satisfies the same boundary conditions as an aggregation function, but, instead of requiring monotonicity, only monotonicity along some ...
    • Quantitative feedback control of multiple input single output systems 

      Rico Azagra, Javier; Gil Martínez, Montserrat; Elso Torralba, Jorge Upna Orcid (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. ...
    • Router scheduling configuration based on the maximization of benefit and carried best effort traffic 

      Magaña Lizarrondo, Eduardo Upna Orcid; Morató Osés, Daniel Upna Orcid; Varaiya, Pravin (Kluwer Academic Publishers, 2003)   Artículo / Artikulua  OpenAccess
      This paper shows a configuration scheme for networks with WFQ schedulers. It guarantees maximum revenue for the service provider in the worst case of network congestion. We focus on best effort traffic and select those ...
    • 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 ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
      Logo MinisterioLogo Fecyt