Ara es mostren els items 17-20 de 20

  • The formulation of structural time series models in discrete and continuous time 

    Harvey, A. C. (Universitat Politècnica de Barcelona. Centre de Càlcul, 1983-12)
    Accés obert
    This paper sets out an approach for modelling univariate time series, including those in which observations are available on a daily basis. An underlying continuous time model is formulated and it is shown that this model ...
  • Time-Varying Market Beta: Does the estimation methodology matter? 

    Nieto, Belén; Orbe, Susan; Zarraga, Ainoha (Institut d'Estadística de Catalunya, 2014-06-12)
    Accés obert
    This paper compares the performance of nine time-varying beta estimates taken from three different methodologies never previously compared: least-square estimators including nonparametric weights, GARCH-based estimators ...
  • Variable structure control in natural frame for three-phase grid-connected inverters with LCL filter 

    Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Martín Cañadas, María Elena (2017-07-05)
    Accés obert
    This paper presents a variable structure control in natural frame for a three-phase voltage source inverter. The proposed control method is based on modifying the converter model in natural reference frame, preserving the ...
  • Vision-based absolute navigation for the Martian landing 

    Martínez Torío, Alexandra (Universitat Politècnica de Catalunya, 2013-12-09)
    Projecte Final de Màster Oficial
    Accés restringit per decisió de l'autor
    Future European missions aspire to bring soil samples from Mars back to Earth. The precise identification of the site from which samples are taken leads to major constraints as to the landing accuracy of the lander. ...