Exploració per tema "bifurcations"

Ara es mostren els items 1-12 de 12

    • A route to chaos in the Boros-Moll map 

      Gardini, Laura; Mañosa Fernández, Víctor; Sushko, Iryna (2018-04-18)
      Report de recerca
      Accés obert
      The Boros-Moll map appears as a subsystem of a Landen transformation associated to certain rational integrals and its dynamics is related to the convergence of them. In the paper, we study the dynamics of a one-parameter ...

    • Analysis of bifurcation behavior of a piecewise linear vibrator with electromagnetic coupling for energy harvesting applications 

      El Aroudi, Abdelali; Ouakad, Hassen; Benadero García-Morato, Luis; Younis, Mohammad (2014-05)
      Article
      Accés obert
      Recently, nonlinearities have been shown to play an important role in increasing the extracted energy of vibration-based energy harvesting systems. In this paper, we study the dynamical behavior of a piecewise linear (PWL) ...

    • Continuous singularities in hamiltonian relative equilibria with abelian momentum isotropy 

      Rodríguez Olmos, Miguel Andrés (American Institute of Mathematical Sciences, 2020)
      Article
      Accés restringit per política de l'editorial
      We survey several aspects of the qualitative dynamics around Hamiltonian relative equilibria. We pay special attention to the role of continuous singularities and its effect in their stability, persistence and bifurcations. ...

    • Excitability transitions and wave dynamics under spatiotemporal structured noise 

      Alonso Muñoz, Sergio; Sagués Mestres, Francesc; Sancho Herrero, José María (2002-06-14)
      Article
      Accés obert
      We present an analytic and numerical study of the effects of external fluctuations in active media. Our analytical methodology transforms the initial stochastic partial differential equations into an effective set of ...

    • Exploring the energy landscapes of flexible molecular loops using higher-dimensional continuation 

      Porta Pleite, Josep Maria; Jaillet, Leonard Georges (2013)
      Article
      Accés obert
      The conformational space of a flexible molecular loop includes the set of conformations fulfilling the geometric loop-closure constraints and its energy landscape can be seen as a scalar field defined on this implicit set. ...

    • Extensional channel flow revisited: a dynamical systems perspective 

      Marqués Truyol, Francisco; Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando; Weidman, Patrick (2017-06-07)
      Article
      Accés obert
      Extensional self-similar flows in a channel are explored numerically for arbitrary stretching–shrinking rates of the confining parallel walls. The present analysis embraces time integrations, and continuations of steady ...

    • Morfodinàmica d'una llera auxiliar a un riu de graves. El cas del Gállego 

      Boix Oliva, Júlia (Universitat Politècnica de Catalunya, 2019-06-13)
      Projecte Final de Màster Oficial
      Accés obert
      Aquest treball consisteix en l'estudi numèric del comportament morfodinàmic (evolució dels contorns del riu) d'una llera auxiliar al riu Gállego a Saragosssa. L'objectiu principal del treball és conèixer les causes del ...

    • Noise-induced Brownian motion of spiral waves 

      Alonso Muñoz, Sergio; Sagués Mestres, Francesc (2001-03-20)
      Article
      Accés obert
      We study the erratic displacement of spiral waves forced to move in a medium with random spatiotemporal excitability. Analytical work and numerical simulations are performed in relation to a kinematic scheme, assumed to ...

    • Phase portrait of Hamiltonian systems with homogeneous nonlinearities 

      Gasull Embid, Armengol; Guillamon Grabolosa, Antoni; Mañosa Fernández, Víctor (1999)
      Article
      Accés obert
      The main goal of this work is to describe the phase portarit of Hamiltonian systems with a non degenerate center at the origin and homogeneous nonlinearities of arbitrary degree n. We apply our results to the case n=2 to ...

    • Regularization of sliding global bifurcations derived from the local fold singularity of filippov systems 

      Bonet Revés, Carles; Martínez-Seara Alonso, M. Teresa (2016-07-01)
      Article
      Accés obert
      In this paper we study the Sotomayor-Teixeira regularization of a general visible fold singularity of a planar Filippov system. Extending Geometric Fenichel Theory beyond the fold with asymptotic methods, we determine the ...

    • The frequency map for billiards inside ellipsoids 

      Ramírez Ros, Rafael; Sánchez Casas, José Pablo (2010-04)
      Report de recerca
      Accés obert
      The billiard motion inside an ellipsoid Q Rn+1 is completely integrable. Its phase space is a symplectic manifold of dimension 2n, which is mostly foliated with Liouville tori of dimension n. The motion on each Liouville ...

    • Unfolding piecewise-smooth dynamics in a single inductor multiple-output switching converter 

      Moreno Font, Vanessa (Universitat Politècnica de Catalunya, 2009-11-09)
      Tesi
      Accés obert
      Els convertidors commutats de potència són solucions apropiades per subministrar energia a dispositius electrònics per la seva elevada eficiència i reduït cost. El seu ús extensiu en les últimes dècades ha motivat els ...