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Bustince, H. ; Barrenechea, E. ; Fernández, J. ; Pagola, M. ; Montero, Javier ; Guerra, C. | Elsevier Science INC | 2010In this paper we address a key problem in many fields: how a structured data set can be analyzed in order to take into account the neighborhood of each individual datum. We propose representing the dataset as a fuzzy relation, associating a memb[...]texto impreso
Fernández, J. ; Romero, Rosana ; Carrasco, Daniel ; Tiampo, K. F. ; Rodríguez Velasco, Gema ; Aparicio, A. ; Araña, V. ; Gónzalez Matesanz, F. J. | Blackwell Publishing Ltd | 2005Tenerife is one of the most well monitored islands of the Canaries, but the surveillance generally is centred on Las Canadas Caldera, where the Teide volcano is located. In the last 180 000 yr, the eruptions on Tenerife Island have never occurre[...]texto impreso
Bustince, H. ; Barrenechea, E. ; Fernández, J. ; Pagola, M. ; Montero, Javier | Springer International Publishing | 2015In this work we introduce a method for building interval-valued negations using the characterization theorem for strong negations which was proposed by Trillas in 1979. We also show that interval type-2 fuzzy sets are a three dimensional represe[...]texto impreso
Prieto, J. F. ; Gónzalez, P. J. ; Seco, A. ; Rodríguez Velasco, Gema ; Tunini, L. ; Perlock, P.A. ; Arjona, Alicia ; Aparicio, A. ; Camacho, A. G. ; Rundle, J.B. ; Tiampo, K.F. ; Pallero, J. L. G. ; Pospiech, S. ; Fernández, J. | Birkhäuser | 2008We review the results of the geodetic and structural studies carried out on La Palma Island using geodetic and geophysical data during the period 1992-2007. InSAR and GPS observation techniques were applied to study the existence of deformation [...]texto impreso
Arjona, Alicia ; Díaz Díaz, Jesús Ildefonso ; Fernández, J. | Universidad de Castilla-La Mancha | 2009Many volcanic constructs have geometric different shapes depending on different phenomena as parasitic cones, erosion or coral growth. In Lacey, Ockendon and Turcotte [11] the authors proposed a nonlinear model proving that the shape of volcanoe[...]texto impreso
Fernández, J. ; Gónzalez Matesanz, F. J. ; Prieto, J. F. ; Rodríguez Velasco, Gema ; Staller, A. ; Alonso Medina, A. ; Charco Romero, María | Birkhäuser | 2004This paper describes design, observation methodology, results and interpretation of the GPS surveys conducted in the areas of the N-W of Tenerife where deformation was detected using InSAR. To avoid undesirable antenna positioning errors in the [...]texto impreso
Bustince, H. ; Barrenechea, Edurne ; Pagola, M. ; Fernández, J. ; Xu, Z. ; Bedregal, B. ; Montero, Javier ; Hagras, H. ; Herrera, F. ; De Baets, B. | Institute of Electrical and Electronics Engineers Inc. | 2016In this paper, 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 applications in which they[...]texto impreso
Bustince, H. ; Pagola, M. ; Fernández, J. ; Melo-Pinto, P. ; Couto, P. ; Tizhoosh, H.R. ; Montero, Javier | Elsevier Science BV | 2010In this paper, we define the concept of an ignorance function and use it to determine the best threshold with which to binarize an image. We introduce a method to construct such functions from t-norms and automorphisms. By means of these new mea[...]texto impreso
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Fernández, J. ; Yu, T. T. ; Rodríguez Velasco, Gema ; González Matesanz, J. ; Romero, R. ; Rodríguez, G. ; Quirós, R. ; Dalda, A. ; Aparicio, A. ; Blanco, M. J. | Elsevier Science Publishers | 2003Even though volcanic activity in Tenerife is characterized by the fact that eruptions do not normally occur more than once in the same volcanic edifice, geodetic monitoring has mainly focused on the Las Canadas Caldera, where a geodetic micronet[...]texto impreso
In this paper we address a key issue in scenario classification, where classifying concepts show a natural overlapping. In fact, overlapping needs to be evaluated whenever classes are not crisp, in order to be able to check if a certain classifi[...]texto impreso
Bustince, H. ; Fernández, J. ; Mesiar, R. ; Montero, Javier ; Orduna, R | European Society of Fuzzy Logic and Technology | 2009-07-20In this work we study overlap degrees expressed in terms of overlap functions. We present the basic properties that from our point of view must satisfy these overlap functions. We study a construction method, we analyze which t-norms are also ov[...]texto impreso
Montero, Javier ; Bustince, H. ; Franco, C. ; Rodríguez, Juan Tinguaro ; Gómez, Daniel ; Pagola, M. ; Fernández, J. ; Barrenechea, E. | Elservier | 2016In 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 be found in fuzzy logi[...]texto impreso
Arqueros Martínez, Fernando ; Cortina, J. ; Fernández, J. ; Fonseca González, Mª Victoria ; González, J. G. ; Martínez, S. ; Mirzoyan, R. ; Moralejo, A. ; Padilla, L. ; Sánchez, J. A. | EDP Sciencies | 1996-10Data from the HEGRA air shower array are used to set an upper limit on the emission of gamma-radiation above 25 (18) TeV from the direction of the radio bright region DR4 within the SNR G78.2 + 2.1 of 2.5 (7.1). 10^-13 cm^-2 sec^-1. The shock fr[...]
