Now showing items 1-11 of 11

  • Adaptive reduced basis strategy based on goal oriented error assessment for stochastic problems 

    Florentin, Eric; Díez, Pedro (2012-06)
    Article
    Open Access
    In the framework of stochastic non-intrusive finite element modeling, a common practice is using Monte Carlo simulation. The main drawback of this approach is the computational cost, because it requires computing a large ...
  • Anàlisi dels costos de producció elèctrica atribuïbles als distints mitjans de generació 

    Nabona Francisco, Narcís (Universitat Politècnica de Barcelona. Centre de Càlcul, 1980-12)
    Article
    Open Access
    The generation costs of each different electrical production resource (thermal with coal, with gas, with oil, with nuclear, and hydro-power) are essential data for the planning of power systems with a mixed-type generation ...
  • Data analysis and interpretation of results in DATAS trial: reply 

    Cobo Valeri, Erik; Quesada, Aurelio; Arribas, Fernando; Almendral, Jesús (2008-09-16)
    Article
    Open Access
    We appreciate the letter from Vardanyan and Kanna, which provides us with the opportunity to clarify some issues about the DATAS trial.
  • Estimació dels paràmetres de models ARMA (P,Q) mitjançant algorismes de filtratge òptim 

    Muñoz Gracia, María del Pilar (Universitat Politècnica de Catalunya, 1988-01-01)
    Doctoral thesis
    Open Access
    El objetivo del trabajo era sintetizar un filtro no lineal optimo para la estimación de parámetros de modelos arma. El interés de un filtro de este estilo reside en elhecho que permite evaluar exactamente el numero mínimo ...
  • Molecular Na-channel excitability from statistical physics 

    Ramírez de la Piscina Millán, Laureano; Sancho Herrero, José María (2014-12-11)
    Article
    Open Access
    The excitable properties of the neural cell membrane is the driving mechanism of the neural pulses. Coordinated ionic fluxes across Na and K channels are the devices responsible of this function. Here we present a simple ...
  • Physical properties of voltage gated pores 

    Ramírez de la Piscina Millán, Laureano; Sancho Herrero, José María (Springer, 2018-01-15)
    Article
    Open Access
    Experiments on single ionic channels have contributed to a large extent to our current view on the function of cell membrane. In these experiments the main observables are the physical quantities: ionic concentration, ...
  • Positivity theorem for a general manifold 

    Léandre, Rémi (Institut d'Estadística de Catalunya, 2005)
    Article
    Open Access
    We give a generalization in the non-compact case to various positivity theorems obtained by Malliavin Calculus in the compact case.
  • Sampling-based stochastic analysis of the PKN model for hydraulic fracturing 

    Garikapati, Hasini; V. Verhoosel, Clemens; van Brummelen, Harald; Zlotnik, Sergio; Díez, Pedro (2019-02)
    Article
    Open Access
    Hydraulic fracturing processes are surrounded by uncertainty, as available data is typically scant. In this work, we present a sampling-based stochastic analysis of the hydraulic fracturing process by considering various ...
  • Statistical study of personal computer cluster harmonic currents from experimental measurements 

    Mesas García, Juan José; Sainz Sapera, Luis; Sala Pérez, Pau (2015-01-02)
    Article
    Open Access
    The net harmonic currents generated by a cluster of desktop personal computers are studied statistically. Personal computers (PCs) are single-phase non-linear loads with low individual consumption but significant collective ...
  • Una generalización de los procesos estocásticos log-normal y de Gompertz como procesos de Itô 

    Gómez García, Juan; Buendía Moya, Fulgencio (Institut d'Estadística de Catalunya, 2001)
    Article
    Open Access
    Estudiamos una ecuación diferencial estocástica de Itô que es una generalización de los modelos estocásticos logarítmico-normal y de Gomperz. Reducimos la ecuación mediante una transformación de cambio de estado a otra que ...
  • Uncertainty quantification for stochastic systems 

    Jornet Sanz, Marc (Universitat Politècnica de Catalunya, 2018-10)
    Master thesis
    Restricted access - author's decision
    Random differential equations arise to model smooth random phenomena. The error term, instead of being introduced by means of a white noise, arises from imposing randomness to the input coefficients and initial/boundary ...