Now showing items 5072-5091 of 76186

  • An isotropic damage model for geomaterials in the KRATOS framework 

    Pouplana Sarda, Ignasi de (Universitat Politècnica de Catalunya, 2015-02)
    Master thesis
    Open Access
    L’evolució de la fractura en materials quasi-fràgils com el formigó, les roques, o els sòls, sovint és tractada amb estovament de deformacions dins el marc de la mecànica del dany continu. Aquestes relacions constitutives ...
  • An isotropic damage model for geomaterials in the Kratos framework 

    Pouplana Sarda, Ignasi de; Oñate Ibáñez de Navarra, Eugenio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2015)
    Book
    Open Access
    Progressive fracture in quasi-brittle materials such as concrete, rocks, soils, is often treated as strain softening in continuum damage mechanics. Such constitutive relations favour spurious strain localization and ...
  • An iterated local search algorithm for the facility location problem 

    Uceda Santos, Sergi (Universitat Politècnica de Catalunya, 2014-11-26)
    Master thesis
    Open Access
    Desenvolupar un Iterated Local Search amb tècniques d'aleatorització esbiaixada per solucionar el Uncapacitated Facility Location Problem.
  • An iterated local search algorithm for the single-vehicle cyclic inventory routing problem 

    Vansteenwegen, Pieter; Mateo Doll, Manuel (Elsevier, 2014-09-16)
    Article
    Restricted access - publisher's policy
    The Single-Vehicle Cyclic Inventory Routing Problem (SV-CIRP) belongs to the class of Inventory Routing Problems (IRP) in which the supplier optimises both the distribution costs and the inventory costs at the customers. ...
  • An iterative algorithm for approximate median graph computation 

    Ferrer Sumsi, Miquel; Bunke, Horst (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    Conference report
    Restricted access - publisher's policy
    Recently, the median graph has been shown to be a good choice to obtain a representative of a given set of graphs. It has been successfully applied to graph-based classification and clustering. In this paper we exploit a ...
  • An iterative model for fractal antennas: application to the Sierpinski gasket antenna 

    Puente Baliarda, Carles; Borja Borau, M.Carmen; Navarro Rodero, Mònica; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05-31)
    Article
    Open Access
    A simple model that explains the behavior of the Sierpinski fractal antenna is presented. This model shows that the multiband behavior of the Sierpinski fractal antenna is a consequence of its fractal nature. The model is ...
  • An LCA study of an electricity coal supply chain 

    Wang, Chao; Mu, Dong (OmniaScience, 2014-04)
    Article
    Open Access
    Purpose: The aim of this paper is to provide methods to find the emission source and estimate the amount of waste gas emissions in the electricity coal supply chain, establish the model of the environmental impact (burden) ...
  • An LMI approach to H_ synchronization of second-order neutral master-slave systems 

    Reza Karimi, Hamid; Zapateiro, Mauricio; Luo, Ningsu; Rossell Garriga, Josep Maria (American Automatic Control Council, 2009-06-10)
    Conference report
    Open Access
    The H_ synchronization problem of the master and slave structure of a second-order neutral master-slave systems with time-varying delays is presented in this paper. Delaydependent sufficient conditions for the design of a ...
  • An LMI approach to robust fault estimation for a class of nonlinear systems 

    Witczak, Marcin; Buciakowski, Mariusz; Puig Cayuela, Vicenç; Rotondo, Damiano; Nejjari Akhi-Elarab, Fatiha (2015-06-01)
    Article
    Restricted access - publisher's policy
    The paper presents a robust fault estimation approach for a class of nonlinear discrete-time systems. In particular, two sources of uncertainty are present in the considered class of systems, that is, an unknown input and ...
  • An LMS-based adaptive predistorter for cancelling nonlinear memory effects in RF power amplifiers 

    Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Bertran Albertí, Eduardo; Cesari Bohigas, Albert; García, José Antonio (2007-12)
    Conference lecture
    Open Access
    This paper presents the design of an adaptive Digital Predistorter (DPD) for Power Amplifier (PA) linearization whoseimplementation and real time adaptation can be fully performed in a Field Programmable Gate Array (FPGA). ...
  • An LPV Fractional Hayami Model for Canal Control 

    Bolea Monte, Yolanda; Martínez González, Rubén; Grau Saldes, Antoni; Martínez García, Herminio (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
    Conference report
    Restricted access - publisher's policy
  • An LPV Fractional Model for Canal Control 

    Bolea Monte, Yolanda; Martínez González, Rubén; Grau Saldes, Antoni; Martínez García, Herminio (PERGAMON PRESS. IFAC SERIES., 2009)
    Conference report
    Restricted access - publisher's policy
    In this paper an LPV non-integer order control model of an irrigation canal is derived from system identification experiments. This model is experimentally obtained by using the described LPV fractional identification ...
  • An m-level active-clamped converter topology - Operating principle 

    Busquets Monge, Sergio; Nicolás Apruzzese, Joan (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference report
    Open Access
    This paper presents a novel multilevel active-clamped converter topology, which is an extension to m levels of the three-level active neutral-point-clamped topology. The operating principle is established through the ...
  • An Ngram-based reordering model 

    Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (Elsevier, 2009-07)
    Article
    Restricted access - publisher's policy
    This paper describes in detail a novel approach to the reordering challenge in statistical machine translation (SMT). This Ngram-based reordering (NbR) approach uses the powerful techniques of SMT systems to generate a ...
  • An object-oriented approach to the translation between MOF Metaschemas 

    Raventós Pagès, Ruth (Universitat Politècnica de Catalunya, 2009-02-27)
    Doctoral thesis
    Open Access
  • An objective scatter index based on double-pass retinal images of a point source to classify cataracts 

    Artal, Pablo; Benito, Antonio; Pérez, Guillermo M.; Alcón, E.; de Casas, A.; Pujol Ramo, Jaume; Marin, José M. (2011)
    Article
    Open Access
  • An objective seismic damage index for the evaluation of the performace of RC buildings 

    Vielma, Juan Carlos; Barbat Barbat, Horia Alejandro; Oller Martínez, Sergio Horacio (2008)
    Conference report
    Restricted access - publisher's policy
    In modern earthquake-resistant design codes, structural elements have a non-linear behavior during an earthquake, similar to what is considered in the design process, which implies that elements are damaged and it is ...
  • An observational description of a tornadic severe weather event 

    Bech, Joan; Pineda Ruegg, Nicolau; Aran, M; Amaro, J; Gayà, M; Arús, J; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2009)
    Conference lecture
    Restricted access - author's decision
    This study presents an analysis of a severe weather case study that took place during the early morning of the 2nd of November 2008, when intense convective activity associated to a rapidly evolving low pressure system ...
  • An octree isosurface codification based on discrete planes 

    Boada, Imma; Navazo Álvaro, Isabel (2001)
    Conference report
    Open Access
    Describes a method to code a decimated model of an isosurface on an octree representation while maintaining volume data if it is needed. The proposed technique is based on grouping the marching cubes (MC) patterns into ...
  • An OFDMA-PON with non-preselected independent ONU sources and centralized feedback wavelength control: Dimensioning and experimental results 

    Cano Valadéz, Iván Nicolás; Santos Blanco, M. Concepción; Escayola Elias, Francisco Javier; Polo Querol, Víctor; Giacoumidis, E.; Kachris, C.; Tomkos, Ioannis; Prat Gomà, Josep Joan (IEEE, 2012)
    Conference report
    Restricted access - publisher's policy
    A simple and low cost method for wavelength control based on centralized OLT monitoring and feedback of economical random non-preselected independent ONU sources is presented. The technique was dimensioned and experimentally ...