Now showing items 1-20 of 38

    • A new estimation of the lower error bound in balanced truncation method 

      Ha Binh, Minh; Batlle Arnau, Carles; Fossas Colet, Enric (2014-08-01)
      Article
      Open Access
      For a single-input/single-output (SISO) linear time-invariant dynamical system, the standard H-infinity-norm lower error bound of balanced truncation method is parallel to G(s) - G(r)(s)parallel to(H infinity) >= sigma(r+1), ...
    • An interval technical indicator for financial time series forecasting 

      Ruiz Vegas, Francisco Javier; Samà Monsonís, Albert; Sanchez, German; Sanabria, José A.; Agell Jané, Núria (2011)
      Conference report
      Open Access
      In this work we compare the performance of some standard technical indicators with an interval technical indicator, the moving interval (MI), for time series forecasting. MI has the advantage of taking into account the ...
    • Analyzing human gait and posture by combining feature selection and kernel methods 

      Samà Monsonís, Albert; Angulo Bahón, Cecilio; Pardo Ayala, Diego Esteban; Català Mallofré, Andreu; Cabestany Moncusí, Joan (2011-09)
      Article
      Open Access
      This paper evaluates a set of computational algorithms for the automatic estimation of human postures and gait properties from signals provided by an inertial body sensor. The use of a single sensor device imposes ...
    • Anàlisi de l'atur registrat : a través de l'anàlisi de sèries temporals 

      Roca Saquero, Roger (Universitat Politècnica de Catalunya, 2005-01)
      Master thesis (pre-Bologna period)
      Open Access
      Una bona eina per mesurar l'estat del mercat de treball en qualsevol àmbit territorial és l'atur, que mesura el nombre de persones que estan en situació de treballar i busquen feina. En l'actualitat hi ha dues fonts ...
    • Anàlisi de la problemàtica d'una empresa i desenvolupament d'un programa de séries temporals per introduir-la a l'anàlisi de dades 

      González Cárcamo, David (Universitat Politècnica de Catalunya, 1999)
      Master thesis (pre-Bologna period)
      Open Access
      El métode que es farà servir per fer aquesta introducció serà a través de la realització d'un programa que faci aquest anàlisi (sense haver de tenir cap coneixement en estadística ni en teoria de series temporals) i ...
    • Anàlisi de la variabilitat del ritme cardíac en corredors del Projecte Summit 

      Birk Tuá, Sara; Forgas Ylla-català, Ariadna (Universitat Politècnica de Catalunya, 2016-06-23)
      Bachelor thesis
      Restricted access - confidentiality agreement
    • Are the markets influenced by the frequency and the long relationships? 

      Márquez, M. Dolores; Muñoz Gracia, María del Pilar (2008)
      Conference report
      Restricted access - publisher's policy
      This paper analyzes the multivariate volatility effects among the indexes returns time series of the main stock markets. We detect, applying cointegration techniques, relations of interdependence between these markets and ...
    • Artificial neural networks applied to forecasting time series 

      Montaño Moreno, Juan José; Palmer Pol, Alfonso; Muñoz Gracia, María del Pilar (2011)
      Article
      Restricted access - publisher's policy
      This study offers a description and comparison of the main models of Artificial Neural Networks (ANN) which have proved to be useful in time series forecasting, and also a standard procedure for the practical application ...
    • Characterizing signal encoding and transmission in class i and class II neurons via ordinal time-series analysis 

      Estarellas Martín, Cristian; Masoliver Vila, Maria; Masoller Alonso, Cristina; Mirasso Santos, Claudio Rubén (Institute of Physics (IOP), 2020-01-16)
      Article
      Restricted access - publisher's policy
      Neurons encode and transmit information in spike sequences. However, despite the effort devoted to understand the encoding and trans-mission of information, the mechanisms underlying the neuronal encoding are not yet fully ...
    • Clustering and visualization of multivariate time series 

      Vellido Alcacena, Alfredo; Olier Caparroso, Iván (Information Science Reference, 2009)
      Part of book or chapter of book
      Restricted access - publisher's policy
      The exploratory investigation of multivariate time series (MTS) may become extremely difficult, if not impossible, for high dimensional datasets. Paradoxically, to date, little research has been conducted on the exploration ...
    • Comparing the dynamics of periodically forced lasers and neurons 

      Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Masoller Alonso, Cristina (2019-10-21)
      Article
      Open Access
      Neuromorphic photonics is a new paradigm for ultra-fast neuro-inspired optical computing that canrevolutionize information processing and artificial intelligence systems. To implement practicalphotonic neural networks is ...
    • Convolutional Neural Networks, image recognition and financial time series forecasting 

      Arratia Quesada, Argimiro Alejandro; Sepúlveda, Eduardo (2019)
      Conference report
      Restricted access - publisher's policy
      Convolutional Neural Networks (CNN) are best known as good image classifiers. This model is recently been used for financial forecasting. The purpose of this work is to show that by converting financial information into ...
    • Effects of using mean curve in the analysis of repeated time series 

      Gibert, Karina; Rojo, Emili; Rodas, Jorge (2010)
      Article
      Restricted access - publisher's policy
      This paper is involved with the analysis of serial measures concerning a set of patients. For every patient, a variable number of series is measured, in different periods along time. A usual way to analyze this kind of ...
    • Estimation of dynamic models using kernel density 

      Font, X; Muñoz Gracia, María del Pilar; Martí Recober, Manuel (2002-08)
      Conference lecture
      Restricted access - publisher's policy
      The objective of this work is to present a simple approach to deal with a dynamic model without imposing any assumptions on the error distribution. Using a state-space representation the model does not need any optimization ...
    • Estimation of the uncertainty in time domain indices of RR time series 

      García González, Miguel Ángel; Fernández Chimeno, Mireya; Ramos Castro, Juan José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-03-31)
      Article
      Open Access
      A method for estimating the uncertainty in time-domain indices of RR time series is described. The method relies on the central limit theorem that states that the distribution of a sample average of independent samples has ...
    • Estudio de las etapas de diseño y desarrollo de un sistema de monitorización basado en sensores inteligentes 

      Miranda Quesada, Natalia (Universitat Politècnica de Catalunya, 2020-09-28)
      Bachelor thesis
      Open Access
      Este proyecto está dedicado a estudiar las etapas de diseño y el desarrollo de un sistema de monitorización basado en sensores inteligentes. Para ello nos basamos en la estructura del internet de las cosas (IoT), la llamada ...
    • Evaluation of innovative approaches in active distribution network management via time-series simulations 

      Rullan de la Cruz, Antoni (Universitat Politècnica de Catalunya / Eidgenössische Technische Hochschule Zürich, 2014)
      Bachelor thesis
      Open Access
      Covenantee:   Eidgenössische Technische Hochschule Zürich
      European directives for renewable energies and decreasing costs of these alternative generation technologies are incentivising a transformation of the electricity markets, grid infrastructure and the way the grid is ...
    • Formalism for a multiresolution time series database model 

      Llusà Serra, Aleix; Vila Marta, Sebastià; Escobet Canal, Teresa (2016-03)
      Article
      Open Access
      We formalise a specialised database management system model for time series using a multiresolution approach. These special purpose database systems store time series lossy compressed in a space-bounded storage. Time series ...
    • Geometrical models for time series analysis 

      Pardo Fernández, Àlex (Universitat Politècnica de Catalunya, 2015-10-23)
      Master thesis
      Open Access
      In this work, a new approach to one class classification is proposed using geometrical models. The proposal is based on the kernelization of a technique of Approximate Polytope Ensemble (APES). It is named Kernel Approximate ...
    • Heart rate variability analysis in athletes at sea-level and high altitude performances 

      Gómez Villar, Judith (Universitat Politècnica de Catalunya, 2016-06-23)
      Bachelor thesis
      Restricted access - confidentiality agreement