Ara es mostren els items 5511-5530 de 85860

  • An Efficient representation for sparse graphs 

    Valiente Feruglio, Gabriel Alejandro (2002-02)
    Report de recerca
    Accés obert
    The design of efficient graph algorithms usually precludes the test of edge existence, because an efficient support of that operation already requires time (n^2) for the initialization of an adjacency-matrix representation. ...
  • An efficient spectral code for incompressible flows in cylindrical geometries 

    Mercader Calvo, María Isabel; Batiste Boleda, Oriol; Alonso Maleta, María Aránzazu (2010-02)
    Article
    Accés restringit per política de l'editorial
    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
    Accés obert
    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
    Accés obert
    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
    Accés obert
    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)
    Text en actes de congrés
    Accés obert
    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
    Accés restringit per política de l'editorial
    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)
    Text en actes de congrés
    Accés obert
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • 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
    Accés obert
    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
    Accés obert
    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
    Accés obert
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    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 ...
  • An empirical comparison of machine learning techniques for dam behaviour modelling 

    Salazar González, Fernando; Toledo Municio, Miguel Ángel; Oñate Ibáñez de Navarra, Eugenio; Morán Moya, Rafael (2015-09)
    Article
    Accés restringit per política de l'editorial
    Predictive models are essential in dam safety assessment. Both deterministic and statistical models applied in the day-to-day practice have demonstrated to be useful, although they show relevant limitations at the same ...
  • An Empirical equation to estimate mineral dust concentrations from visibility observations in Northern Africa 

    Camino, C; Cuevas, Emilio; Basart, Sara; Alonso Perez, Silvia; Baldasano Recio, José María; Terradellas, E.; Marticorena, B; Berjon, A; Rodriguez, S (2015-03-01)
    Article
    Accés restringit per política de l'editorial
    This paper presents a new empirical equation relating horizontal visibility and PM10 dust concentrations. The new empirical equation (IZO-Eq) is derived from observations performed at the Izana Atmospheric Observatory (IZO, ...
  • An empirical evaluation of five small area estimators 

    Costa, Àlex; Satorra, A.; Ventura, Eva (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    This paper compares five small area estimators. We use Monte Carlo simulation in the context of both artificial and real populations. In addition to the direct and indirect estimators, we consider the optimal composite ...
  • An empirical evaluation of High-Level Synthesis languages and tools for database acceleration 

    Arcas Abella, Oriol; Ndu, Geoffrey; Sonmez, N.; Ghasempour, Mohsen; Armejach, Adrià; Navaridas, Javier; Song, Wei; Mawer, John; Cristal Kestelman, Adrián; Lujan, Mikel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés obert
    High Level Synthesis (HLS) languages and tools are emerging as the most promising technique to make FPGAs more accessible to software developers. Nevertheless, picking the most suitable HLS for a certain class of algorithms ...
  • An empirical evaluation roadmap for iStar 2.0 

    López Cuesta, Lidia; Aydemir, Fatma Basak; Dalpiaz, Fabiano; Horkoff, Jennifer (2016)
    Text en actes de congrés
    Accés obert
    The iStar 2.0 modeling language is the result of a two-year community effort intended at providing a solid, unified basis for teaching and conducting research with i*. The language was released with important qualities in ...