Ara es mostren els items 1983-2002 de 90956

  • A generic simulator for aperture synthesis radiometers 

    Camps Carmona, Adriano José; Hyuk, Park; Barbosa Torralbo, José; Bandeiras, J.; D'Addio, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    ESA's SMOS mission has demonstrated that Synthetic Aperture Interferometric Radiometers can be a useful tool for Earth observation. Today, the NASA's GeoStar instrument (USA), ESA's GAS instrument (Europe), or CSSAR's GIMS ...
  • A generic simulator for aperture synthesis radiometers: Radiative transfer module and end-to-end tests 

    Camps Carmona, Adriano José; Hyuk, Park; Barbosa, José; Bandeiras, J.; Sousa, Ana; d'Addio, Salvatore; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The Synthetic Aperture Interferometric Radiometer (SAIR) Performance Simulator (SAIRPS) is a very versatile software tool developed by Deimos Engenharia (Portugal) and the Universitat Politècnica de Catalunya-Barcelona ...
  • A genetic algorithm approach to optimization of power peaks in an automated warehouse 

    Cárdenas Araújo, Juan José; García Espinosa, Antonio; Romeral Martínez, José Luis; Andrade Rengifo, Fabio (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
    Text en actes de congrés
    Accés obert
    The simultaneous operation of the automated storage and retrieval machines (ASRs) in an automated warehouse can increase the likelihood that high power demand peaks turn unstable the electric system. Furthermore, high ...
  • A genetic algorithm for the multistage control of a fuzzy system in a fuzzy environment 

    Kacprzyk, Janusz (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1997)
    Article
    Accés obert
    We discuss a prescriptive approach to multistage optimal fuzzy control of a fuzzy system, given by a fuzzy state transition equation. Fuzzy constraints and fuzzy goals at consecutive control stages are given, and ...
  • A genetic algorithm-based system for Wireless Mesh Networks: analysis of system data considering different routing protocols and architectures 

    Oda, Tetsuya; Elmazi, Donald; Barolli, Admir; Sakamoto, Shinji; Barolli, Leonard; Xhafa Xhafa, Fatos (Springer, 2016-07-01)
    Article
    Accés restringit per política de l'editorial
    Wireless mesh networks (WMNs) are attracting a lot of attention from wireless network researchers. Node placement problems have been investigated for a long time in the optimization field due to numerous applications in ...
  • A genetic association study of colon cancer 

    Densalat Ventayol, Júlia (Universitat Politècnica de Catalunya, 2014-07)
    Treball Final de Grau
    Accés obert
    The project of this bachelor degree concerns the statistical analysis of a genetic database provided by Professor Victor Moreno, epidemiologist of the Hospital de Bellvitge in Barcelona. The goal is to investigate associations ...
  • A genome-wide study of Hardy–Weinberg equilibrium with next generation sequence data 

    Graffelman, Jan; Jain, Deepti; Weir, B.S. (2017-04-03)
    Article
    Accés obert
    Statistical tests for Hardy–Weinberg equilibrium have been an important tool for detecting genotyping errors in the past, and remain important in the quality control of next generation sequence data. In this paper, we ...
  • A geographical heuristic routing protocol for VANETs 

    Urquiza Aguiar, Luis; Tripp Barba, Carolina; Aguilar Igartua, Mónica (2016-10-01)
    Article
    Accés obert
    Vehicular ad hoc networks (VANETs) leverage the communication system of Intelligent Transportation Systems (ITS). Recently, Delay-Tolerant Network (DTN) routing protocols have increased their popularity among the research ...
  • A geological model for the management of subsurface data in the urban environment of Barcelona and surrounding area 

    Vázquez Suñé, Enric; Marazuela Calvo, Miguel Ángel; Velasco Mansilla, Domitila Violeta; Diviu, Marc; Perez Estaun, A.; Álvarez Marrón, Joaquina (2016-09)
    Article
    Accés obert
    The overdevelopment of cities since the industrial revolution has shown the need to incorporate a sound geological knowledge in the management of required subsurface infrastructures and in the assessment of increasingly ...
  • A geometric approach to dense Cayley digraphs of finite Abelian groups 

    Aguiló Gost, Francisco de Asis L.; Fiol Mora, Miquel Àngel; Pérez Mansilla, Sonia (Elsevier, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We give a method for constructing infinite families of dense (or eventually likely dense) Cayley digraphs of finite Abelian groups. The diameter of the digraphs is obtained by means of the related {\em minimum distance ...
  • A geometric approach to dense Cayley digraphs of finite Abelian groups 

    Aguiló Gost, Francisco de Asis L.; Fiol Mora, Miquel Àngel; Pérez Mansilla, Sonia (2016)
    Article
    Accés restringit per política de l'editorial
    We give a method for constructing infinite families of dense (or eventually likely dense) Cayley digraphs of finite Abelian groups. The diameter of the digraphs is obtained by means of the related minimum distance diagrams. ...
  • A geometric approach to the Carlson problem 

    Compta Creus, Albert; Ferrer Llop, Josep (Society for Industrial and Applied Mathematics (Filadèlfia), 2000)
    Article
    Accés obert
    The possible observability indices of an observable pair of matrices, when supplementary subpairs are prescribed, are characterized when the “quotient” one is nilpotent. The geometric techniques used are also valid in the ...
  • A geometric approach to the existence of orbits with unbounded energy in generic periodic perturbations by a potential of generic geodesic flows of T<sup>2</sup> 

    Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Martínez-Seara Alonso, M. Teresa (1999)
    Article
    Accés obert
    We give a proof based in geometric perturbation theory of a result proved by J.N. Mather using variational methods. Namely, the existence of orbits with unbounded energy in perturbations of a generic geodesic flow in T^2 ...
  • A geometric bridge between regularised damage and energetically equivalent cracks 

    Tamayo Mas, Elena; Rodríguez Ferran, Antonio (2012)
    Text en actes de congrés
    Accés obert
    In order to achieve a better characterisation of a whole failure process, models which combine damage and fracture mechanics have recently been proposed. Here, a new combined methodology is presented: in order to describe ...
  • A geometric mechanism for diffusion in Hamiltonian systems overcoming the large gap problem: heuristics and rigorous verification on a model. 

    Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Martínez-Seara Alonso, M. Teresa (2003)
    Article
    Accés obert
    We introduce a geometric mechanism for di?usion in a priori unstable nearly integrable dynamical systems. It is based on the observation that resonances, besides destroying the primary KAM tori, create secondary tori and ...
  • A geometric mechanism for diffusion in Hamiltonian systems overcoming the large gap problem: Announcement of results 

    Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Martínez-Seara Alonso, M. Teresa (2003)
    Article
    Accés obert
    We present a geometric mechanism for diffusion in Hamiltonian systems. We also present tools that allow to verify it in a concrete model. In particular, we verify it in a system which presents the large gap problem.
  • A geometric mechanism of diffusion: Rigorous verification in a priori unstable Hamiltonian systems 

    Delshams Valdés, Amadeu; Huguet Casades, Gemma (2010-07)
    Report de recerca
    Accés obert
    In this paper we consider a representative a priori unstable Hamiltonian system with 2 + 1/2 degrees of freedom, to which we apply the geometric mechanism for diffusion introduced in the paper Delshams et al., Mem. Amer. ...
  • A geometric mechanism of diffusion: rigorous verification in a priori unstable Hamiltonian systems 

    Delshams Valdés, Amadeu; Huguet Casades, Gemma (2011-03-01)
    Article
    Accés restringit per política de l'editorial
    In this paper we consider a representative a priori unstable Hamiltonian system with 2 + 1/2 degrees of freedom and we apply the geometric mechanism for diffusion introduced in [A. Delshams, R. de la Llave, T.M. Seara, ...
  • A Geometric relaxation solver for parametric constraint-based models 

    Solano Albajés, Lluís; Brunet Crosa, Pere (1998-06)
    Report de recerca
    Accés obert
    In this paper, a new relaxation algorithm for solving geometric constraint-based models is proposed. The algorithm starts from a constructive symbolic representation of objects (Constructive ...
  • A geometric study of abnormality in optimal control problems for control and mechanical control systems 

    Barbero Liñán, María (Universitat Politècnica de Catalunya, 2008-12-19)
    Tesi
    Accés obert
    Durant els darrers quaranta anys la geometria diferencial ha estat una eina fonamental per entendre la teoria de control òptim. Habitualment la millor estratègia per resoldre un problema és transformar-lo en un altre ...