Ara es mostren els items 20051-20070 de 87995

  • Cotxe d'autocròs 

    Garriga Rodriguez, Albert; Baró Guerra, Joan (Universitat Politècnica de Catalunya, 2000-12)
    Projecte/Treball Final de Carrera
    Accés restringit per acord de confidencialitat
    L’objectiu d’aquest projecte és dissenyar, sense arribar a construir, un car-cròs que pugui participar en el campionat nacional de l’especialitat dins de la divisió IV. Per aquest motiu el vehicle ha de complir la normativa ...
  • El cotxe elèctric. Present i futur. Anàlisi de dades 

    Ramos Masdeu, Joan (Universitat Politècnica de Catalunya, 2015-05-05)
    Treball Final de Grau
    Accés obert
    El cotxe elèctric va néixer al segle XIX i ha viscut una història d'alts i baixos. El primer vehicle elèctric va ser una locomotora que va aparèixer l'any 1838 de la mà de l'escocès Robert Davidson. La invenció de les ...
  • Cotxe en concepte multiplataforma 

    Pellicer Martín, Bernat (Universitat Politècnica de Catalunya, 2013)
    Treball Final de Grau
    Accés obert
    En aquest projecte, s'ha volgut aportar un canvi en la mentalitat de fabricació de les grans empreses automobilístiques, introduint el concepte d'una multiplataforma estàndard. Aquest concepte, es basa en adaptar diverses ...
  • Could L'Hospital have read Newton's methodus fluxionum 

    Blanco Abellán, Mónica (2008)
    Comunicació de congrés
    Accés obert
  • Coulomb corrections to the equation of state of nuclear statistical equilibrium matter: implications for SNIa nucleosynthesis and the accretion-induced collapse of white dwarfs 

    Bravo Guil, Eduardo; García Senz, Domingo (1999-08)
    Article
    Accés obert
    Coulomb corrections to the equation of state of degenerate matter are usually neglected in high-temperature regimes, owing to the inverse dependence of the plasma coupling constant, G, on temperature. However, nuclear ...
  • Counterexample to a conjecture on the algebraic limit cycles of polynomial vector fields 

    Llibre Saló, Jaume; Pantazi, Chara (2004)
    Article
    Accés obert
    In Geometriae Dedicata 79 (2000), 101{108, Rudolf Winkel conjectured: For a given algebraic curve f = 0 of degree m > 4 there is in general no polynomial vector ¯eld of degree less than 2m ¡ 1 leaving invariant f = 0 ...
  • Countergradient heat flux observations during the evening transition period 

    Blay Carreras, Estel; Pardyjak, Eric; Pino González, David; Alexander, Daniel; Lohou, Fabienne; Lothon, Marie (2014-09-03)
    Article
    Accés obert
    Gradient-based turbulence models generally assume that the buoyancy flux ceases to introduce heat into the surface layer of the atmospheric boundary layer in temporal consonance with the gradient of the local virtual ...
  • Counting CO2 emissions in planning sustainable urban quarters 

    Cuchí Burgos, Alberto; Pagès Ramon, Anna (2007-12)
    Capítol de llibre
    Accés restringit per política de l'editorial
  • Counting configuration–free sets in groups 

    Rué Perna, Juan José; Serra Albó, Oriol; Vena Cros, Lluís (2015)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    We present a unified framework to asymptotically count the number of sets, with a given cardinality, free of certain configurations. This is done by combining the hypergraph containers methodology joint with arithmetic ...
  • Counting H-colorings of partial k-trees 

    Díaz Cort, Josep; Serna Iglesias, María José; Thilikos Touloupas, Dimitrios (2000-11)
    Report de recerca
    Accés obert
    The problem of counting all H-colorings of a graph G of n vertices is considered. While the problem is, in general #P-complete, we give linear time algorithms that solve the main variants of this problem when the input ...
  • Counting list h-colorings and variants 

    Díaz Cort, Josep; Serna Iglesias, María José; Thilikos Touloupas, Dimitrios (2001-05)
    Report de recerca
    Accés obert
    We study the counting versions of several variants of the H-coloring problem. The complexity of the H-coloring problem is described by a dichotomy theorem that classifies the problem according to the the topology of H ...
  • Counting polygon dissections in the projective plane 

    Noy Serrano, Marcos; Rué Perna, Juan José (2008-10)
    Article
    Accés obert
    For each value of k ≥ 2, we determine the number pn of ways of dissecting a polygon in the projective plane into n subpolygons with k + 1 sides each. In particular, if k = 2 we recover a result of Edelman and Reiner (1997) ...
  • Countries three wise men: sustainability, innovation, and competitiveness 

    Fonseca, Luis Miguel; Lima, Vanda Marlene (OmniaScience, 2015-10)
    Article
    Accés obert
    Purpose: The studies on links between sustainability, innovation, and competitiveness have been mainly focused at organizational and business level. The purpose of this research is to investigate if there is a correlation ...
  • Country level efficiency and national systems of entrepreneurship: a data envelopment analysis approach 

    Lafuente González, Esteban Miguel; Szerb, László; Acs, Zoltan (2016)
    Article
    Accés obert
    This paper tests the efficiency hypothesis of the knowledge spillover theory of entrepreneurship. Using a comprehensive database for 63 countries for 2012, we employ data envelopment analysis to directly test how countries ...
  • Couplage de modèles de circulation atmosphérique et océanique à l’échelle régionale 

    Sabarich Flores, Ramon (Universitat Politècnica de Catalunya / Institut National Polytechnique de Toulouse, 2009)
    Projecte/Treball Final de Carrera
    Accés restringit per decisió de l'autor
    La création des modèles numériques utilisant les équations de la dinamique des fluides permet de modéliser des situations climatologiques futures. Une des problématiques actuelles est d'améliorer l'échelle du calcul, ...
  • Coupled analysis of a backfill hydration test 

    Alonso Pérez de Agreda, Eduardo; Lloret Morancho, Antonio; Delahaye, Carlos Héctor; Vaunat, Jean; Gens Solé, Antonio; Volckaert, G. (Wiley, 1998)
    Article
    Accés obert
    BACCHUS2 in situ isothermal wetting experiment has been analysed by means of a coupled flow-deformation approach. Backfill material, a mixture of Boom clay powder and high density pellets, has been extensively tested in ...
  • Coupled analysis of an in situ experiment in a soft argillaceous rock using a new constituive model 

    Vaunat, Jean; Garitte, Benoit; Gens Solé, Antonio (Taylor and Francis, 2006)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper addresses the issue of the description of the coupled thermo-hydro-mechanical behaviour of argillaceous rocks. A constitutive law, developed for this type of materials, is firstly described. It is based on an ...
  • Coupled analysis of chemo-mechanical processes 

    Gens Solé, Antonio; Guimarães, Leonardo do N; Fernandez, A.M.; Olivella Pastallé, Sebastià; Sánchez, M. (ISTE Wiley, 2008)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • Coupled analysis of degradation processes in concrete specimens at the meso-level 

    Idiart, Andrés Enrique (Universitat Politècnica de Catalunya, 2009-07-10)
    Tesi
    Accés obert
    En los últimos años, el análisis numérico de problemas acoplados, como los procesos de degradación de materiales y estructuras relacionados con los efectos medioambientales, ha cobrado especial importancia en la comunidad ...
  • Coupled analysis of double porosity swelling clays 

    Gens Solé, Antonio; Guimarães, Leonardo do N; Sánchez, Marcelo; Valleján, Beatriz (Springer, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The understanding of the coupled behaviour of highly active swelling clays is better achieved considering two structural levels and their interactions in the context of a double-porosity model. Hydraulic equilibrium between ...