Now showing items 5089-5108 of 78894

  • An efficient hybrid iterated local search algorithm for the total tardiness blocking flow shop problem 

    Ribas Vila, Immaculada; Companys Pascual, Ramón; Tort-Martorell Llabrés, Xavier (2012-09-04)
    External research report
    Open Access
    This paper deals with the blocking flow shop problem and proposes an Iterated Local Search (ILS) procedure combined with a variable neighbourhood search (VNS) for the total tardiness minimization. The proposed ILS makes ...
  • An efficient implementation of the FAPEC compression algorithm in the CCSDS image standard 

    Artigues Aguiló, Gabriel (Universitat Politècnica de Catalunya, 2012-06-26)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] The implementation of an efficient image compressor using the FAPEC coder in the CCSDS image data compression standard (122.0).
  • An efficient iterated local search algorithm for the total tardiness blocking flow shop problem 

    Ribas Vila, Immaculada; Companys Pascual, Ramón; Tort-Martorell Llabrés, Xavier (Taylor & Francis, 2013-04-27)
    Article
    Restricted access - publisher's policy
    This paper deals with the blocking flow shop problem and proposes an Iterated Local Search (ILS) procedure combined with a variable neighbourhood search (VNS) for the total tardiness minimisation. The proposed ILS makes ...
  • An efficient metaheuristic for the inventory orienteering problem and the single-vehicle cyclic inventory routing problem 

    Vansteenwegen, Pieter; Mateo Doll, Manuel (2013)
    Conference report
    Open Access
  • An efficient method for the azimuth compression of geosynchronous SAR data through sub-apertures processing 

    Belotti, Michele; Broquetas Ibars, Antoni; Leanza, Antonio; Monti Guarnieri, Andrea; Recchia, Andrea; Rocca, Fabio; Ruiz Rodon, Josep; Tebaldini, Stefano (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    We propose an efficient method for the azimuth compression and Atmospheric Phase Screen estimation of Geosynchronous SAR data. The method is based on the iterative processing of sub-apertures of increasing size, allowing ...
  • An efficient multi-scale method for non-linear analysis of composite structures 

    Otero Gruer, Fermín Enrique; Martínez García, Javier; Oller Martínez, Sergio Horacio; Salomon Rotlisbeger, Ramon Omar (2015-11-01)
    Article
    Open Access
    The use of multi-scale procedures is encouraged by the continuous increase of computational capacity, but it is still a challenge performing a non-linear analysis of real composite structures without the aid of large ...
  • An efficient spectral code for incompressible flows in cylindrical geometries 

    Mercader Calvo, María Isabel; Batiste Boleda, Oriol; Alonso Maleta, María Aránzazu (2010-02)
    Article
    Restricted access - publisher's policy
    An efficient and accurate numerical scheme is proposed to solve the incompressible Navier–Stokes equations in a bounded cylinder. The scheme is based on a projection method formulated in primitive variables to maintain the ...
  • An eigenvalue characterization of antipodal distance-regular graphs 

    Fiol Mora, Miquel Àngel (1997-11)
    Article
    Open Access
    Let $\Gamma$ be a regular (connected) graph with $n$ vertices and $d+1$ distinct eigenvalues. As a main result, it is shown that $\Gamma$ is an $r$-antipodal distance-regular graph if and only if the distance graph $\Gamma_d$ ...
  • An Eigenvector pattern arising in non linear regression 

    Cuadras, C.M. (Carlos Maria) (Universitat Politècnica de Catalunya. Centre de Càlcul, 1990)
    Article
    Open Access
    Let A = (aij) be an n x n matrix defined by aij = aji = i, i = 1,...,n. This paper gives some elementary properties of A and other related matrices. The eigenstructure of A is conjectured: given an eigenvector v of A the ...
  • An elastic plastic damage formulation for concrete: application to elementary and structural tests 

    Jason, L; Huerta, Antonio; Pijaudier-Cabot, Gilles; Ghavamian, S (2006-11)
    Article
    Open Access
    Pure elastic damage models or pure elastic plastic constitutive laws are not totally satisfactory to describe the behaviour of concrete. They indeed fail to reproduce the unloading slopes during cyclic loading which define ...
  • An elastoplastic model for the THM analysis of freezing soils 

    Satoshi, Nishimura; Gens Solé, Antonio; Olivella Pastallé, Sebastià; Jardine, Richard (2009)
    Conference report
    Open Access
    By employing a combination of ice pressure, liquid pressure and total stress as state variables, a new thermoplastic constitutive model has been developed that encompasses frozen and unfrozen behaviour within a unified ...
  • An Electric taxi fleet charged by second use batteries: not just economic profit 

    Canals Casals, Lluc; Amante García, Beatriz (Emerald Group Publishing, 2013-07-15)
    Article
    Restricted access - publisher's policy
    The road transport sector is the second biggest CO2 emissions contributor after energy generation. In urban environments, its impact is increased due to the worse combustion engine driving efficiency. It is thought that ...
  • An Electric taxi fleet charging system using second life electric car batteries simulation and economical approach 

    Canals Casals, Lluc; Amante García, Beatriz (Publicaciones de la Universidad de Valladolid, 2013)
    Conference report
    Open Access
    The industrial car manufacturers see in the high battery price an im-portant obstacle for an electric vehicle mass selling, thus mass production. There-fore, in order to find some cost relieves and better selling opportunities, ...
  • An electromagnetic interference reduction check list for unmanned aircraft system 

    Tristancho Martínez, Joshua; Quílez Figuerola, Marcos; Pastor Llorens, Enric (2010)
    Conference report
    Restricted access - publisher's policy
  • An elemental processor of fuzzy SQL 

    Medina Rodríguez, Juan Miguel; Pons Capote, Olga; Vila Miranda, María Amparo (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1994)
    Article
    Open Access
    This paper reports an alternative for implementing an SQL fuzzy extension on a Fuzzy Relational Database System. This proposal tries to build an FSQL processor using representation and manipulation mechanisms offered by ...
  • An ellipsoidal billiard with a quadratic potential 

    Fedorov, Yuri (2003)
    Article
    Open Access
    There exists an in infite hierarchy of integrable generalizations of the geodesic flow on an n -di- mensional ellipsoid.hese generalizations describe the motion of a point in the force fields of certain polynomial potentials.In ...
  • An emergency dispatch model considering the urgency of the requirement for reliefs in different disaster areas 

    Sheng, Liu; Wen-Jing, Tan; Guo-Dong, Yu; Fei, Li (OmniaScience, 2015-12)
    Article
    Open Access
    Purpose: Frequent sudden-onset disasters which have threatened the survival of human and the development of society force the public to pay an increasing attention to emergency management. A challenging task in the process ...
  • An empirical analysis of the resiliency of Ro/Ro and Ro/Pax terminal operations 

    Saurí Marchán, Sergi; Morales Fusco, Pau; Martín Alcalde, Enrique (2012)
    Conference report
    Restricted access - publisher's policy
    Regular maritime lines with roll-on roll-off vessels must offer a reliable service without substantial cost increases in order to be competitive. Port terminals need to be able to respond quickly to any disturbance that ...
  • An empirical analysis of the resiliency of Ro/Ro and Ro/Pax terminal operations 

    Saurí Marchán, Sergi; Morales Fusco, Pau; Martín Alcalde, Enrique (2012)
    Conference report
    Restricted access - publisher's policy
    Regular maritime lines with roll-on roll-off vessels must offer a reliable service without substantial cost increases in order to be competitive. Port terminals need to be able to respond quickly to any disturbance that ...
  • An empirical approach to rockfall fragmentation 

    Corominas Dulcet, Jordi; Ruiz Carulla, Roger; Mavrouli, Olga Christina (2015)
    Conference lecture
    Restricted access - publisher's policy
    The impact-induced rock mass fragmentation in a rockfall is analyzed by comparing the In Situ Block Size Distribution (IBSD) at the cliff face and the Rockfall Block Size Distribution (RBSD) on the slope. The IBSD is ...