Now showing items 77-96 of 135

    • Nested formulation paradigms for induced ordered weighted averaging aggregation for decision‐making and evaluation 

      Zhu, Chen; Jin, LeSheng; Mesiar, Radko; Yager, Ronald R.; Paternain Dallo, Daniel Upna Orcid; Bustince Sola, Humberto Upna Orcid (Wiley, 2019)   Artículo / Artikulua  OpenAccess
      Existing extensions to Yager's ordered weighted aver-aging (OWA) operators enlarge the application rangeand to encompass more principles and properties relatedto OWA aggregation. However, these extensions do notprovide a ...
    • New fractional step Runge-Kutta-Nyström methods up to order three 

      Bujanda Cirauqui, Blanca Upna Orcid; Moreta, M. Jesús; Jorge Ulecia, Juan Carlos Upna Orcid (Elsevier, 2020)   Artículo / Artikulua
      Fractional Step Runge–Kutta–Nyströ (FSRKN) methods have been revealed to be an excellent option to integrate numerically many multidimensional evolution models governed by second order in time partial differential equations. ...
    • Non-superreflexivity of Garling sequence spaces and applications to the existence of special types of conditional bases 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L.; Dilworth, S. J.; Kutzarova, Denka (Instytut Matematyczny, 2020)   Artículo / Artikulua  OpenAccess
      We settle in the negative the problem of the superreflexivity of Garling sequence spaces by showing that they contain a complemented subspace isomorphic to a non-superreflexive mixed-norm sequence space. As a by-product, ...
    • Normalization through invariants in n-dimensional Kepler problems 

      Meyer, Kenneth Ray; Palacián Subiela, Jesús Francisco Upna Orcid; Yanguas Sayas, Patricia Upna Orcid (Pleiades Publishing, 2018)   Artículo / Artikulua  OpenAccess
      We present a procedure for the normalization of perturbed Keplerian problems in n dimensions based on Moser regularization of the Kepler problem and the invariants associated to the reduction process. The approach allows ...
    • The null space of fuzzy inclusion measures 

      Couso, Inés; Bustince Sola, Humberto Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid; Sánchez, Luciano (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      Some formal relationships between the different axiomatic definitions of inclusion measure are analysed. In particular, the links between the different proposals about the null-space (the collection of pairs associated ...
    • Numerical and experimental investigation of the stability of a drop in a single-axis acoustic levitator 

      Andrade, Marco Aurélio Brizzotti; Marzo Pérez, Asier Upna Orcid (American Institute of Physics, 2019)   Artículo / Artikulua  OpenAccess
      Acoustic levitation can be employed to hold liquid drops in midair, enabling novel applications in X-ray scattering of proteins, amorphous crystallization of solutions, or contactless mixing. Multiple studies have characterized ...
    • On a particular class of Meijer's G functions appearing in fractional calculus 

      Karp, D. B.; López García, José Luis Upna Orcid (Academic Publications, 2018)   Artículo / Artikulua  OpenAccess
      In this paper we investigate the Meijer G-function G p+1,p+1 p,1 which, for certain parameter values, represents the Riemann-Liouville fractional integral of the Meijer-Nørlund function G p,p. p,0 The properties of this ...
    • On admissible orders on the set of discrete fuzzy numbers for application in decision making problems 

      Riera, Juan Vicente; Massanet, Sebastia; Bustince Sola, Humberto Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      The study of orders is a constantly evolving topic, not only for its interest from a theoretical point of view, but also for its possible applications. Recently, one of the hot lines of research has been the construction ...
    • On admissible orders over closed subintervals of [0,1] 

      Santana, Fagner; Bedregal, Benjamin Upna; Viana, Petrucio; Bustince Sola, Humberto Upna Orcid (Elsevier, 2020)   Artículo / Artikulua
      In this paper, we make some considerations about admissible orders on the set of closed subintervals of the unit interval I[0,1], i.e. linear orders that refine the product order on intervals. We propose a new way to ...
    • On certain subspaces of p for 0 < p ≤ 1 and their applications to conditional quasi-greedy bases in p-Banach spaces 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L.; Wojtaszczyk, Przemyslaw (Springer, 2021)   Artículo / Artikulua
      We construct for each 0<p≤1 an infinite collection of subspaces of ℓp that extend the example of Lindenstrauss (Bull. Acad. Polon. Sci. Sér. Sci. Math. Astronom. Phys. 12, 539–542, 1964) of a subspace of ℓ1 with no ...
    • On co-orbital quasi-periodic motion in the three-body problem 

      Cors, Josep Maria; Palacián Subiela, Jesús Francisco Upna Orcid; Yanguas Sayas, Patricia Upna Orcid (Society for Industrial and Applied Mathematics (SIAM), 2019)   Artículo / Artikulua  OpenAccess
      Within the framework of the planar three-body problem we establish the existence of quasi-periodic motions and KAM 4-tori related to the co-orbital motion of two small moons about a large planet where the moons move in ...
    • On fixed point theory in partially ordered sets and an application to asymptotic complexity of algorithms 

      Estevan Muguerza, Asier Upna Orcid; Miñana, Juan José; Valero, Óscar (Springer, 2019)   Artículo / Artikulua  OpenAccess
      The celebrated Kleene fixed point theorem is crucial in the mathematical modelling of recursive specifications in Denotational Semantics. In this paper we discuss whether the hypothesis of the aforementioned result can be ...
    • On some classes of directionally monotone functions 

      Bustince Sola, Humberto Upna Orcid; Mesiar, Radko; Kolesárová, Anna; Pereira Dimuro, Graçaliz Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid; Díaz, Irene; Montes, S. (Elsevier, 2020)   Artículo / Artikulua
      In this work we consider some classes of functions with relaxed monotonicity conditions generalizing some other given classes of fusion functions. In particular, directionally increasing aggregation functions (called also ...
    • On the nonlinear stability of the triangular points in the circular spatial restricted three-body problem 

      Cárcamo Díaz, Daniela Jacqueline; Palacián Subiela, Jesús Francisco Upna Orcid; Vidal Díaz, Claudio; Yanguas Sayas, Patricia Upna Orcid (Pleiades Publishing, 2020)   Artículo / Artikulua  OpenAccess
      The well-known problem of the nonlinear stability of L4 and L5 in the circular spatial restricted three-body problem is revisited. Some new results in the light of the concept of Lie (formal) stability are presented. In ...
    • On the normalization of interval data 

      Santiago, Regivan; Bergamaschi, Flaulles; Bustince Sola, Humberto Upna Orcid; Pereira Dimuro, Graçaliz Upna Orcid; Asmus, Tiago Upna; Sanz Delgado, José Antonio Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      The impreciseness of numeric input data can be expressed by intervals. On the other hand, the normalization of numeric data is a usual process in many applications. How do we match the normalization with impreciseness on ...
    • On the performances of trend and change-point detection methods for remote sensing data 

      Militino, Ana F. Upna Orcid; Moradi, Mohammad Mehdi; Ugarte Martínez, María Dolores Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Detecting change-points and trends are common tasks in the analysis of remote sensing data. Over the years, many different methods have been proposed for those purposes, including (modified) Mann-Kendall and Cox-Stuart ...
    • Online relative risks/rates estimation in spatial and spatio-temporal disease mapping 

      Adin Urtasun, Aritz Upna Orcid; Goicoa Mangado, Tomás Upna Orcid; Ugarte Martínez, María Dolores Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Background and objective: Spatial and spatio-temporal analyses of count data are crucial in epidemiology and other fields to unveil spatial and spatio-temporal patterns of incidence and/or mortality risks. However, fitting ...
    • Optical fiber sensors based on microstructured optical fibers to detect gases and volatile organic compounds-A review 

      López Torres, Diego Upna Orcid; Elosúa Aguado, César Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Since the first publications related to microstructured optical fibers (MOFs), the development of optical fiber sensors (OFS) based on them has attracted the interest of many research groups because of the market niches ...
    • Orness for real m-dimensional interval-valued OWA operators and its application to determine a good partition 

      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 (Taylor & Francis, 2019)   Artículo / Artikulua  OpenAccess
      Ordered Weighted Averaging (OWA) operators are a profusely applied class of averaging aggregation functions, i.e. operators that always yield a value between the minimum and the maximum of the inputs. The orness measure ...
    • Orness measurements for lattice m-dimensional interval-valued 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 (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      Ordered weighted average (OWA) operators are commonly used to aggregate information in multiple situations, such as decision making problems or image processing tasks. The great variety of weights that can be chosen to ...