Ara es mostren els items 11402-11421 de 93775

  • Asymmetric transmission from a 2D PT-symmetric honeycomb nanostructure 

    Botey Cumella, Muriel; Herrero Simon, Ramon; Turduev, M.; Zhao, D.; Giden, I.; Kurt, H.; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    We propose a simple realization of a 2-dimensonal (2D) PT-symmetric photonic structure: a honeycomb arrangement of alternating cylinders with gain or loss in a dielectric background. The structure provides a periodic ...
  • Asymmetrical splitting of higher-order optical solitons induced by quintic nonlinearity 

    Artigas García, David; Torner Sabata, Lluís; Pérez Torres, Juan; Akhmediev, Juan P Torres I Nail N (1997-11)
    Article
    Accés restringit per política de l'editorial
    We address the effect of quintic nonlinearities in the propagation of optical solitons in cubic nonlinear media. Our focus is on the decay of higher-order solitons in the presence of self-defocusing quintic perturbations. ...
  • Asymmetry of retinal physiological measurements in young adults measured with optical coherence tomography 

    A. Alzaben, Zeyad (Universitat Politècnica de Catalunya, 2014-06)
    Projecte Final de Màster Oficial
    Accés obert
    Introduction: Optical coherence tomography (OCT) is a useful technique to assess the retina. In this study, we explored the physiological inter-ocular asymmetry of several retinal parameters in a sample of young Caucasian ...
  • Asymptotic analysis of multiuser-MIMO networks with battery-constrained receivers 

    Rubio López, Javier; Pascual Iserte, Antonio; García Fernández, Juan José; García Armada, Ana; Font Bach, Oriol; Bartzoudis, Nikolaos (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, we present an asymptotic analysis of the behavior of a network where the mobile terminals are considered to be battery-powered devices provided with energy harvesting capabilities. The asymptotic analysis ...
  • Asymptotic analysis of the Gunn effect with realistic boundary conditions 

    Bonilla, L. L.; Rodríguez Cantalapiedra, Inma; Gomila Lluch, Gabriel; Rubí Capaceti, José Miguel (The American Physical Society, 1997-08-31)
    Article
    Accés obert
    A general asymptotic analysis of the Gunn effect in n-type GaAs under general boundary conditions for metal-semiconductor contacts is presented. Depending on the parameter values in the boundary condition of the injecting ...
  • Asymptotic and finite user PER analysis of successive interference cancellation in DS-CDMA 

    Sala Álvarez, José; Villares Piera, Nemesio J.; Rey Micolau, Francesc (2011-11)
    Article
    Accés restringit per política de l'editorial
    An expression is derived for the average Packet Error Rate (PER) of a Successive Interference Canceller (SIC) for DS-CDMA when the number of users asymptotically tends to infinity. The asymptotic probability density function ...
  • Asymptotic behavior of Palais-Smale sequences associated with fractional Yamabe type equations 

    González Nogueras, María del Mar; Fang, Yi (2014)
    Report de recerca
    Accés obert
    In this paper, we analyze the asymptotic behavior of Palais-Smale sequences associated to fractional Yamabe type equations on an asymptotically hyperbolic Riemannian manifold. We prove that Palais-Smale sequences ...
  • Asymptotic behavior of palais-smale sequences associated with fractional yamabe-type equations 

    Fang, Yi; González Nogueras, María del Mar (2015-12-01)
    Article
    Accés obert
    In this paper, we analyze the asymptotic behavior of Palais-Smale sequences associated to fractional Yamabe-type equations on an asymptotically hyperbolic Riemannian manifold. We prove that Palais-Smale sequences can be ...
  • Asymptotic behaviour of the domain of analyticity of invariant curves of the standard map 

    Martínez-Seara Alonso, M. Teresa; Villanueva Castelltort, Jordi (1999)
    Article
    Accés obert
    In this paper we consider the standard map, and we study the invariant curve obtained by analytical continuation, with respect to the perturbative parameter E, of the invariant circle of rotation number the golden mean ...
  • Asymptotic enumeration of non-crossing partitions on surfaces 

    Rué Perna, Juan José; Sau, Ignasi; Thilikos Touloupas, Dimitrios (2013-03-01)
    Article
    Accés restringit per política de l'editorial
    We generalize the notion of non-crossing partition on a disk to general surfaces with boundary. For this, we consider a surface S and introduce the number CS(n) of noncrossing partitions of a set of n points laying on the ...
  • Asymptotic equivalence between the unconditional maximum likelihood and the square-law nonlinearity symbol timing estimation 

    López Salcedo, José Antonio; Vázquez Grau, Gregorio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-01-31)
    Article
    Accés obert
    This paper provides a systematic approach to the problem of nondata aided symbol-timing estimation for linear modulations. The study is performed under the unconditional maximum likelihood framework where the ...
  • Asymptotic error exponents in energy-detector and estimator-correlator signal detection 

    Font Segura, Josep; Vázquez Grau, Gregorio; Riba Sagarra, Jaume (IEEE Computational Intelligence Society, 2012)
    Text en actes de congrés
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    The performance in signal detection is evaluated by the error (false-alarm and missed-detection) probabilities. However, calculating these probabilities is a difficult task in practice. This paper studies the asymptotic ...
  • Asymptotic MAP upper bounds for LDPC codes 

    Matas Navarro, David; Lamarca Orozco, M. Meritxell (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper aims at computing tight upper bounds for the maximum a posteriori threshold of low-density parity check codes in the asymptotic blocklength regime for the transmission over binary-input memoryless symmetricoutput ...
  • Asymptotic normality of the integrated square error of a density estimator in the convolution model 

    Butucea, Cristina (Institut d'Estadística de Catalunya, 2004)
    Article
    Accés obert
    In this paper we consider a kernel estimator of a density in a convolution model and give a central limit theorem for its integrated square error (ISE). The kernel estimator is rather classical in minimax theory when the ...
  • Asymptotic size of Herman rings of the complex standard family by quantitative quasiconformal surgery 

    Fagella Rabionet, Núria; Martínez-Seara Alonso, M. Teresa; Villanueva Castelltort, Jordi (2003)
    Article
    Accés obert
    In this paper we consider the complexification of the Arnold standard family of circle maps given by $\widetilde F_{\alpha,\ep}(u)=u{\rm e}^{{\rm i}\alpha} {\rm e}^{\frac{\ep}{2}(u-\frac{1}{u})}$, with $\alpha=\alpha( ...
  • Asymptotic size of Herman Rings using quasiconformal surgery 

    Granell i Yuste, Francesc (Universitat Politècnica de Catalunya, 2016-07)
    Treball Final de Grau
    Accés obert
    This thesis gives an introduction to the theory of quasiconformal surgery. To that end, we consider the complexification of the Arnol'd standard family of circle maps. These functions are analytically linearisable under ...
  • Asymptotic study of canonical correlation analysis: from matrix and analytic approach to operator and tensor approach 

    Fine, Jeanne (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    Asymptotic study of canonical correlation analysis gives the opportunity to present the different steps of an asymptotic study and to show the interest of an operator and tensor approach of multidimensional asymptotic ...
  • Asymptotic study of subcritical graph classes 

    Drmota, Michael; Fusy, Éric; Kang, Mihyun; Kraus, Veronika; Rué Perna, Juan José (2011-12-01)
    Article
    Accés obert
    We present a unified general method for the asymptotic study of graphs from the so-called subcritical graph classes, which include the classes of cacti graphs, outerplanar graphs, and series-parallel graphs. This general ...
  • Asymptotic theory: some recent developments 

    Cox, D. R. (Universitat Politècnica de Barcelona. Centre de Càlcul, 1983-12)
    Article
    Accés obert
    A review is given of recent work on asymptotic theory leading to a recommendation to use ratio likelihood rests with, where available, a Bartlett adjustment factor.
  • Asymptotic time domain evaluation of a multilevel multiphase PWM converter voltage quality 

    Ruderman, Alex; Reznikov, Boris; Busquets Monge, Sergio (IEEE Press. Institute of Electrical and Electronics Engineers, 2012-10-24)
    Article
    Accés restringit per política de l'editorial
    Voltage total harmonic distortion and quadratic voltage ripple criteria are accepted figures of merit of a multilevel pulse width modulation (PWM) converter voltage quality. The dominating frequency domain approach does ...