Now showing items 1-9 of 9

    • A lower bound for the size of a Minkowski sum of dilates 

      Hamidoune, Yayha Old; Rué Perna, Juan José (2011-03-01)
      Article
      Open Access
      Let A be a finite non-empty set of integers. An asymptotic estimate of the size of the sum of several dilates was obtained by Bukh. The unique known exact bound concerns the sum |A + k·A|, where k is a prime and |A| is ...
    • A note on the application of integrals involving cyclic products of kernels 

      Buldygin, Valery V.; Utzet, Frederic; Zaiats, Vladimir (Institut d'Estadística de Catalunya, 2002)
      Article
      Open Access
      In statistics of stochastic processes and random fields, a moment function or a cumulant of an estimate of either the correlation function or the spectral function can often contain an integral involving a cyclic product ...
    • Accounting for differences in element size and homogeneity when comparing Finite Element models: Armadillos as a case study 

      Marcé Nogué, Jordi; de Esteban-Trivigno, Soledad; Escrig Pérez, Christian; Gil Espert, Lluís (2016-08)
      Article
      Open Access
      Computing the average Von Mises stress of Finite Element Models to obtain a single measurement that represents the relative strength of vertebrate structures has been used recently in different works in palaeobiology. ...
    • Análisis de datos funcionales : implementación y aplicaciones 

      Navarro Pérez, Valentín (Universitat Politècnica de Catalunya, 2004-07)
      Master thesis (pre-Bologna period)
      Open Access
      El objetivo de este proyecto ha sido el de hacer posible un análisis de datos funcionales, , descriptivo y de componentes principales funcionales. Es decir: ·Comprender la bibliografia y la teoría del análisis de datos ...
    • Identification des besoins actuels et formalisation d’une méthodologie de cotation fonctionnelle 

      Branchat Freixa, Elisabet (Universitat Politècnica de Catalunya / École Nationale Supérieure d’Arts et Métiers, 2008)
      Master thesis (pre-Bologna period)
      Restricted access - confidentiality agreement
    • Phase-field modeling of fracture in linear thin shells 

      Amiri, Fatemeh; Millán, Daniel; Shen, Yongxing; Rabczuk, Timon; Arroyo Balaguer, Marino (2014-02)
      Article
      Open Access
      We present a phase-field model for fracture in Kirchoff-Love thin shells using the local maximum-entropy (LME) meshfree method. Since the crack is a natural outcome of the analysis it does not require an explicit representation ...
    • Reflexivity in precompact groups and extensions 

      Galindo Pastor, Jorge; Tkachenko, Mikhail; Bruguera Padró, Maria Montserrat; Hernandez, Constancio (2014-02-15)
      Article
      Restricted access - publisher's policy
      We establish some general principles and find some counter-examples concerning the Pontryagin reflexivity of precompact groups and P-groups. We prove in particular that:; (1) A precompact Abelian group G of bounded order ...
    • Transformación digital en el área de Cognitive 

      Giménez Martínez, Javier (Universitat Politècnica de Catalunya, 2019-01)
      Bachelor thesis
      Restricted access - confidentiality agreement
    • Wildness of the problems of classifying two-dimensional spaces of commuting linear operators and certain Lie algebras 

      Futorny, Vyacheslav; Klymchuk, Tetiana; Petravchukc, Anatolii P.; Sergeichuk, Vladimir V. (Elsevier, 2018-01-01)
      Article
      Open Access
      For each two-dimensional vector space V of commuting n×n matrices over a field F with at least 3 elements, we denote by V˜ the vector space of all (n+1)×(n+1) matrices of the form [A¿00] with A¿V. We prove the wildness of ...