Now showing items 1733-1752 of 76282

  • A linear relaxation method for computing workspace slices of the Stewart platform 

    Bohigas Nadal, Oriol; Manubens Ferriol, Montserrat; Ros Giralt, Lluís (ASME PRESS, 2013)
    Article
    Restricted access - publisher's policy
    The workspace of a Stewart platform is a complex sixdimensional volume embedded in the Cartesian space defined by six pose parameters. Because of its large dimension and complex shape, this volume is difficult to compute ...
  • A linear relaxation technique for the position analysis of multi-loop linkages 

    Porta Pleite, Josep Maria; Ros Giralt, Lluís; Thomas, Federico (2008)
    External research report
    Open Access
    This report presents a new method able to isolate all configurations that a multi-loop linkage can adopt. We tackle the problem by providing formulation and resolution techniques that fit particularly well together. The ...
  • A linear relaxation technique for the position analysis of multiloop linkages 

    Porta Pleite, Josep Maria; Ros Giralt, Lluís; Thomas, Federico (2009)
    Article
    Open Access
    This paper presents a new method to isolate all configurations that a multiloop linkage can adopt. The problem is tackled by means of formulation and resolution techniques that fit particularly well together. The adopted ...
  • A linear transform for spectral estimation 

    Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo; Carol Vilanova, Antonio (1981-10)
    Article
    Open Access
  • A linear-by-part approach for dissipative multiple-point collisions in smooth multibody systems with perfect constraints 

    Barjau Condomines, Ana; Agulló Batlle, Joaquim; Font Llagunes, Josep Maria (2012)
    Conference lecture
    Open Access
  • A list of parameterized problems in bioinformatics 

    Félix Ávila, Liliana; García Chacón, Alina; Serna Iglesias, María José; Thilikos Touloupas, Dimitrios (2006-05)
    External research report
    Open Access
    In this report we present a list of problems that originated in bionformatics. Our aim is to collect information on such problems that have been analyzed from the point of view of Parameterized Complexity. For every problem ...
  • A literature review on information systems support for the cooperation of firms within networks 

    Fernandez Martos, Xènia (Universitat Politècnica de Catalunya, 2012)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Nowadays, any company wants to gain a clear competitive advantage in the market. In order to reach this goal it can be important to participate in networks, especially in the case of small and medium enterprises (SMEs). ...
  • A local algorithm for the computation of image velocity via constructive interference of global Fourier components 

    Dellen, Babette; Wörgötter, Florentin (2011)
    Article
    Open Access
    A novel Fourier-based technique for local motion detection from image sequences is proposed. In this method, the instantaneous velocities of local image points are inferred directly from the global 3D Fourier components ...
  • A local constitutive model for the discrete element method: application to geomaterials and concrete 

    Oñate Ibáñez de Navarra, Eugenio; Zárate Araiza, José Francisco; Miquel Canet, Juan; Santasusana Isach, Miquel; Celigueta Jordana, Miguel Ángel; Arrufat Garcia, Ferran; Gandikota, Varadaraju; Valiullin, Khaydar; Ring, Lev (Springer, 2015-06)
    Article
    Restricted access - publisher's policy
    This paper presents a local constitutive model for modelling the linear and non linear behavior of soft and hard cohesive materials with the discrete element method (DEM). We present the results obtained in the analysis ...
  • A localized mapped damage model for orthotropic materials 

    Pelà, Luca; Cervera Ruiz, Miguel; Oller Martínez, Sergio Horacio; Chiumenti, Michèle (2014-05-08)
    Article
    Restricted access - publisher's policy
    This paper presents an implicit orthotropic model based on the Continuum Damage Mechanics isotropic models. A mapping relationship is established between the behaviour of the anisotropic material and that of an isotropic ...
  • A locally adaptive kernel regression method for facies delineation 

    Fernández García, Daniel; Barahona-Palomo, Marco; Henri, Christopher Vincent; Sánchez Vila, Francisco Javier (2015-12-01)
    Article
    Restricted access - publisher's policy
  • A locally extended finite element method for the simulation of multi-fluid flows using the Particle Level Set method 

    Kamran, Kamran; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2015-09-01)
    Article
    Restricted access - publisher's policy
    The simulation of immiscible two-phase flows on Eulerian meshes requires the use of special techniques to guarantee a sharp definition of the evolving fluid interface. This work describes the combination of two distinct ...
  • A Location-Routing Model for a Two-Echelon System of Urban 

    Mercadé Ruiz, Laia (Universitat Politècnica de Catalunya, 2013-11)
    Master thesis
    Restricted access - author's decision
    The freight distribution system of many cities suffering from congestion is based on the use of a single echelon of consolidation facilities that are located in the city outskirts. In this thesis, the introduction of a ...
  • A logic approach for exceptions and anomalies in association rules 

    Delgado, M.; Sánchez, Daniel; Ruiz, M.D. (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2008)
    Article
    Open Access
    Association rules have been used for obtaining information hidden in a database. Recent researches have pointed out that simple associations are insu cient for representing the diverse kinds of knowledge collected in ...
  • A logic programming approach to parsing and production in fluid construction grammar 

    Sierra Santibáñez, Josefina (Springer, 2012)
    Part of book or chapter of book
    Restricted access - publisher's policy
    This paper presents a Logic Programming approach to parsing and production in Fluid Construction Grammar (FCG). It builds on previous work on the formalisation of FCG in terms of First Order Logic (FOL) concepts, more ...
  • A logic-based environmental decision support system for the management of horizontal subsurface constructed wetlands 

    Garcia Gasulla, Dario; Poch Espallargas, Manel; Nieves Sánchez, Juan Carlos; Cortés García, Claudio Ulises; Turon, Clàudia (2012-04-02)
    Article
    Restricted access - publisher's policy
    The use of Horizontal Subsurface Constructed Wetlands (HSCWs) for treating wastewaters in small communities has increased in the last years due to HSCW’s ecological singularities. Unfortunately, the same singularities ...
  • A logistic approximation to the cumulative normal distribution 

    Bowling, Shannon R.; Khasawneh, Mohammad T.; Kaewkuekool, Sittichai; Cho, Byung Rae (School of Industrial and Aeronautic Engineering of Terrassa (ETSEIAT). Universitat Politècnica de Catalunya (UPC), 2009-06)
    Article
    Open Access
    This paper develops a logistic approximation to the cumulative normal distribution. Although the literature contains a vast collection of approximate functions for the normal distribution, they are very complicated, not ...
  • A long Saharan dust event over the western Mediterrranean: Lidar, Sun photometer observations and regional dust modelling. 

    Pérez, Carlos; Nickovic, S.; Baldasano Recio, José María; Sicard, Michaël; Rocadenbosch Burillo, Francisco; Cachorro, V.E. (2006-08-31)
    Article
    Open Access
    A long Saharan dust event affected the western Mediterranean in the period 12– 28 June 2002. Dust was present mainly between 1- and 5-km height affecting most parts of the Iberian Peninsula and reaching western/central ...
  • A long term evolution link level simulator 

    Serra Pagès, Albert (Universitat Politècnica de Catalunya, 2009-02)
    Master thesis
    Open Access
  • A long-term tourism scheme within a networked urban regeneration strategy for historic quarters 

    Jie, Han; Liangliang, Wang; Chye Kiang, Heng (International Forum on UrbanismEscola Técnica Superior d'Arquitectura de Barcelona, 2012-01)
    Conference report
    Open Access
    Many cities have witnessed the rise of urban tourism since 1970s. Nowadays, especially in developing countries, tourism has become an important industry to initiate employment, boost the economy, and regenerate urban ...