Ara es mostren els items 5750-5769 de 87659

  • An explicit expression of the first Liapunov and period constants with applications 

    Gasull Embid, Armengol; Guillamon Grabolosa, Antoni; Mañosa Fernández, Víctor (1996)
    Article
    Accés obert
    In this paper, we study systems in the plane having a critical point with pure imaginary eigenvalues, and we search for effective conditions to discern whether this critical point is a focus or a center; in the case of it ...
  • An explicit method for modeling lossy and dispersive transmission lines 

    Palà Schönwälder, Pere; Miró Sans, Joan Maria (Microwave Exhibitions and Publishers, 1993)
    Text en actes de congrés
    Accés obert
    In this paper, an explicit -non iterative- method for modeling lossy and dispersive transmission lines, allowing the inclusion of skin-effect parameters is described. This method, based on multipoint Padé approximation, ...
  • An exploratory study of group-robot social interactions in a cultural center 

    Paillacho Chiluiza, Dennys Fabian; Angulo Bahón, Cecilio; Díaz Boladeras, Marta (2015)
    Comunicació de congrés
    Accés obert
    This article describes an exploratory study of social human-robot interaction with the experimental robotic platform MASHI. The experiences were carried out in La Bobila Cultural Center in Barcelona, Spain to study the visit
  • An extended formulation for the flexible short-term scheduling of multiproduct semicontinuos plants 

    Capón García, Elisabet; Ferrer Nadal, Sergio; Graells Sobré, Moisès; Puigjaner Corbella, Lluís (2009-01-05)
    Article
    Accés restringit per política de l'editorial
    Chemical plants are moving toward more-flexible environments, to adapt faster to market changes. For the sake of this flexibility, batch and continuous units might be integrated and operated along the same processing route ...
  • An extended matter bounce scenario: current status and challenges 

    Haro Cases, Jaume; Cai, Yi-Fu (2015-08-01)
    Article
    Accés obert
    As an alternative to the paradigm of slow roll inflation, we propose an extended scenario of the matter bounce cosmology in which the Universe has experienced a quasi-matter contracting phase with a variable background ...
  • An extended X-ray absorption fine structure study of the high-affinity cation binding site in the purple membrane 

    Sepulcre Sánchez, Francesc; Cladera, Josep; Garcia, J.; Proietti, Maria Grazia; Torres, Jaume; Padrós Morell, Esteve (1996-02)
    Article
    Accés restringit per política de l'editorial
  • An extension of the slash-elliptical distribution 

    Rojas, Mario A.; Bolfarine, Heleno; Gómez, Héctor W. (Institut d'Estadística de Catalunya, 2014-12-04)
    Article
    Accés obert
    This paper introduces an extension of the slash-elliptical distribution. This new distribution is generated as the quotient between two independent random variables, one from the elliptical family (numerator) and the other ...
  • An extension of the unity vector control method 

    Roqueiro, Nestor; Do Carmo, L. M. M.; Silveira, H. B.; Fossas Colet, Enric (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work, Unity Vector Control is revisited based on the results by V. Utkin and co-workers. The approach here presented extends the one reported by V. Utkin and co-workers so that independent feedback gains may be ...
  • An extension problem for sums of fractional Laplacians and 1-D symmetry of phase transitions 

    Cabré Vilagut, Xavier; Serra Montolí, Joaquim (2015-09-10)
    Article
    Accés restringit per política de l'editorial
    We study nonlinear elliptic equations for operators corresponding to non-stable Lévy diffusions. We include a sum of fractional Laplacians of different orders. Such operators are infinitesimal generators of non-stable ...
  • An extension problem for the CR fractional Laplacian 

    Frank, Rupert L.; González Nogueras, María del Mar; Monticelli, Dario D.; Tan, Jinggang (2015-01-01)
    Article
    Accés obert
    We show that the conformally invariant fractional powers of the sub-Laplacian on the Heisenberg group are given in terms of the scattering operator for an extension problem to the Siegel upper halfspace. Remarkably, this ...
  • An extension problem for the CR fractional Laplacian 

    Frank, Rupert L.; González Nogueras, María del Mar; Monticelli, Dario D.; Tan, Jinggang (2013-12)
    Report de recerca
    Accés obert
    We show that the conformally invariant fractional powers of the sub-Laplacian on the Heisenberg group are given in terms of the scattering operator for an extension problem to the Siegel upper halfspace. Remarkably, this ...
  • An extremely thin and robust interconnecting layer providing 76% fill factor in a tandem polymer solar cell architecture 

    Martínez-Otero, Alberto; Liu, Quan; Mantilla-Perez, Paola; Montes Bajo, Miguel; Martorell Pena, Jordi (Royal Society of Chemistry, 2015-04-17)
    Article
    Accés obert
    We report a thin and robust interconnecting layer (ICL) for polymer tandem solar cells. This ICL shows low absorption, good electrical contacts, large work function contrast and robustness. Its use yields tandem cells with ...
  • An FPGA-based system for real-time monitoring of voltage harmonics 

    Eristi, Belkıs; Yıldırım, Özal; Eristi, Hüseyin; Demir, Yakup (SARTI, 2013)
    Article
    Accés obert
  • An hf radar observing systemfor monitoring the surface circulation in the strait of Gibraltar. Deployement and firts results 

    Fernández, V; Galeano, J.C; Tarafa, N.; Ruiz, M.I; Alvarez, E; Lorente, P; Bruno, M; Dastis, C.; Vázquez, A (SARTI, 2011)
    Article
    Accés obert
  • An HMM-Based Approach to the INTERSPEECH 2011 Speaker State Challenge 

    Nogueiras Rodríguez, Albino (2011)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The current main trend in paralinguistic information recognition is the so-called static classification. In this kind of classification the low level descriptors are pooled togethr by means of statistical functionals ...
  • An HPSG grammar of Spanish implemented in ALE: a solution for dealing with subcategorisation alternances 

    Climent Roca, Salvador; Farreres de la Morena, Xavier (1995-07)
    Report de recerca
    Accés obert
    A core of a grammar of Spanish in HPSG including a solution to deal with verbal subcategorisation alternances avoiding to list different senses in the lexicon is built in ALE. Computational efficacy of HPSG and capabilities ...
  • An hybrid eDRAM/SRAM macrocell to implement first-level data caches 

    Valero, Alejandro; Sahuquillo, Julio; Petit, Salvador; Lorente, Vicente; Canal Corretger, Ramon; López, Pedro; Duato, José (Association for Computing Machinery (ACM), 2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    SRAM and DRAM cells have been the predominant technologies used to implement memory cells in computer systems, each one having its advantages and shortcomings. SRAM cells are faster and require no refresh since reads are ...
  • An i*-based framework for the computer-aided selection of mobile office devices 

    Cares, Carlos; Franch Gutiérrez, Javier; Mayol Sarroca, Enric (2006-01)
    Report de recerca
    Accés obert
    The mobile office devices market is currently growing, mainly due to the descending cost of wireless technology as well as the high diversity of functions and features covered. Diversity and proliferation become a hard ...
  • An i*-based Reengineering Framework for Requirements Engineering 

    Grau Colom, Gemma (Universitat Politècnica de Catalunya, 2008-07-07)
    Tesi
    Accés obert
    Avui en dia, els sistemes d'informació són un actiu clau en les organitzacions i sovint els proporcionen un avantatges competitiu. Per a que això segueixi així, han de ser mantinguts i evolucionats d'acord amb els objectius ...
  • An IBC solar cell for the UPC CubeSat-1 mission 

    Ortega Villasclaras, Pablo Rafael; Jové Casulleras, Roger; Pedret, A; Gonzalvez, G.; López Rodríguez, Gema; Martín García, Isidro; Domínguez Pumar, Manuel; Alcubilla González, Ramón; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work the fabrication and electrical characterization of interdigitated back contact IBC solar cells is shown. These solar cells have been specifically designed for a CubeSat based satellite under developement at ...