Now showing items 5197-5216 of 78625

  • An implicit stabilized finite element method for the compressible Navier-Stokes equations using finite calculus 

    Kouhi Esfahani, Mohammad; Oñate Ibáñez de Navarra, Eugenio (2015-07)
    Article
    Restricted access - publisher's policy
    A new implicit stabilized formulation for the numerical solution of the compressible Navier-Stokes equations is presented. The method is based on the finite calculus (FIC) scheme using the Galerkin finite element method ...
  • An improved algorithm to smooth graded quadrilateral meshes preserving the prescribed element size 

    Sarrate Ramos, Josep; Huerta, Antonio (2001-02)
    Article
    Open Access
    In the generation of quadrilateral unstructured meshes, special attention is focussed to the shape of the elements. This is because it is well known that the distortion of the elements and the accuracy of the analysis are ...
  • An improved boundary extraction algorithm using a plane-sweep technique 

    Ayala Vallespí, M. Dolors; Vergara, Enric (2006-06)
    External research report
    Open Access
    Extracting the boundary of a 3D or a 2D image is a fundamental operation in several image processing related fields. In other fields as NC-data generation, obtaining the cutting areas of sculptured surfaces can be performed ...
  • An improved buffer for bioelectric signals 

    Pallàs Areny, Ramon; Colominas i Balagué, Josep; Rosell Ferrer, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1989-04-01)
    Article
    Open Access
    We propose an AC-coupled amplifier that offers a high in-put impedance, thus making it suitable for bioelectric signal amplifi- cation. We also present the necessary formulas for calculating its input impedance and transfer ...
  • An improved cohesive zone model for ductile dynamic crack propagation 

    Sagimon Buch, Marc (Universitat Politècnica de Catalunya / Technische Universiteit Delft, 2008)
    Master thesis (pre-Bologna period)
    Restricted access - confidentiality agreement
    Ductile dynamic crack propagation is a current field of research in aerospace industry. The damage created by an explosion in a flying airplane depends on the fracture behaviour of the fuselage materials. Thus the rate ...
  • An improved evaluation framework to support local level planning 

    Giné Garriga, Ricard; Jiménez Fernández de Palencia, Alejandro; Flores Baquero, Óscar; Pérez Foguet, Agustí (2013)
    Conference report
    Open Access
    Today, a vast proportion of people still lack a simple pit latrine and a source of safe drinking water. To help end this appalling state of affairs, there is a pressing need to provide policymakers with evidences in ...
  • An improved interference alignment scheme for frequency selective channels 

    Shen, Minqi; Host-Madsen, Anders; Vidal Manzano, José (2008)
    Conference report
    Open Access
    In this paper, the achievable rate of a K-user interference channel with single antenna at individual node is studied. Interference alignment and zero forcing are applied at the transmitter and receiver, respectively. ...
  • An Improved master theorem for divide-and-conquer recurrences 

    Roura Ferret, Salvador (1997-01)
    External research report
    Open Access
    We present a new master theorem for the study of divide-and-conquer recursive definitions, which improves the old one in several aspects. In particular, it provides more information, frees us from technicalities like ...
  • An improved maximum likelihood method for power spectral density estimation 

    Lagunas Hernandez, Miguel A.; Gasull Llampallas, Antoni (1984-02)
    Article
    Open Access
  • An Improved system for modelling Spanish emissions: HERMESv2.0 

    Guevara Vilardell, Marc; Martínez Palau, Francesc; Arevalo Roa, Gustavo; Gassó Domingo, Santiago; Baldasano Recio, José María (2013-12)
    Article
    Restricted access - publisher's policy
    Emission models play a key role in the development of high-resolution air quality modelling systems AQMS.To minimise the uncertainty presented by these models,it is essential to match the highresolution requirements of ...
  • An improved TCF sequence for biobleaching kenaf pulp: influence of the hexenuronic acid content and the use of xylanase 

    Andreu Terrén, Glòria; Vidal Lluciá, Teresa (2014-01-01)
    Article
    Restricted access - publisher's policy
    Enzymatic delignification with laccase from Trametes villosa used in combination with chemical mediators (acetosyringone, acetovanillone and 1-hydroxybenzotriazole) to improve the totally chlorine-free (TCF) bleaching of ...
  • An improved X-FEM solution to ensure normal stress continuity for two-phase flow problems 

    Bozkus, Hayrullah Kerim (Universitat Politècnica de Catalunya, 2012-07-29)
    Master thesis
    Open Access
    In this thesis, starting from the foundations of the Theory of Classical Finite Elements Method, The basic principles of Extended Finite Elements Method (X-FEM) are Explained. Why X-FEM takes place in many applications in ...
  • An improvement of Ostrowski root-finding method 

    Grau Sánchez, Miguel; Díaz Barrero, José Luis (2006-02)
    Article
    Restricted access - publisher's policy
    An improvement to the iterative method based on the Ostrowski one to compute nonlinear equation solutions, which increases the local order of convergence is suggested. The adaptation of a strategy presented here gives a ...
  • An in-band frequency agility modem imlemented with a DSP device 

    Dalmau, J; Delgado, J; Serrat Fernández, Juan; Valle Alarcón, Rafael (Institute of Electrical and Electronics Engineers (IEEE), 1989)
    Conference report
    Open Access
    The authors present a modem with in-band frequency agility that has been implemented with the TMS 32010 signal processor. A strategy based on embedded real-time channel estimation (RTCE) has been adopted to manage the ...
  • An in-operation planning tool architecture for flexgrid network re-optimization 

    Gifre Renom, Lluís; Castro Casales, Alberto; Ruiz Ramírez, Marc; Navarro, Nacho; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    In-operation network planning consists in re-optimizing a network, currently being operated to transport traffic, either minimizing resource utilization or maximizing the transported traffic. In the context of flexgrid ...
  • An incremental algorithm based on edge swapping for constructing restricted Delaunay triangulations 

    Vigo Anglada, Marc (1995-12)
    External research report
    Open Access
    This work presents an algorithm that given a generalized planar graph obtains its Constrained Delaunay Triangulation (CDT). The proposed method works incrementally based in two procedures, one that inserts a new point in ...
  • An incremental hybrid system diagnoser automaton enhanced by discernibility properties 

    Vento Maldonado, Jorge I.; Travé-Massuyès, Louise; Puig Cayuela, Vicenç; Sarrate Estruch, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2014-12-18)
    Article
    Restricted access - publisher's policy
    This paper proposes a method to track the system mode and diagnose a hybrid system without building an entire diagnoser off-line. The method is supported by a hybrid automaton (HA) model that represents the hybrid system ...
  • An index of diversity in stratified random sampling based on the hypoentropy measure 

    Pardo, Leandro; Morales González, Domingo (Universitat Politècnica de Catalunya. Centre de Càlcul, 1990)
    Article
    Open Access
    We consider a measure of the diversity of a population based on the λ-measure of hypoentropy introduced by Ferreri (1980). Our purpose is to study its asymptotic distribution in a stratified sampling and its application ...
  • An index of financial safety of China 

    Jia, Xiaojun; Li, Menggang (OmniaScience, 2015-04)
    Article
    Open Access
    Purpose: This paper combines a synthetic index system by the variables and evaluates China’s financial safety through the change of indexes in a comprehensive way. First of all, it builds the financial industry evaluation ...
  • An Indium Tin Oxide-Free Polymer Solar Cell on Flexible Glass 

    Formica, Nadia; Mantilla-Perez, Paola; Ghosh, Dhriti S.; Janner, David; Chen, Tong Lai; Huang, Minghuang; Garner, Sean; Martorell, Jordi; Pruneri, Valerio (2015-02-05)
    Article
    Open Access
    : Future optoelectronic devices and their low-cost roll-to-roll production require mechanically flexible transparent electrodes (TEs) and substrate materials. Indium tin oxide (ITO) is the most widely used TE because of ...