0000000001026068
AUTHOR
Patrick Marquié
showing 4 related works from this author
A comparative study of noise effects in a FitzHugh-Nagumo circuit
2014
International audience; This paper focuses on the behaviour of a nonlinear FitzHugh-Nagumo circuit in the stochastic case that is in presence of noise and without deterministic driving. When the circuit is tuned below the Andronov-Hopf bifurcation, classical coherence res- onance signature is revealed. We compare the stochastic response of the system when the noise acts on two different parameters of the system. It is experimentally shown that an enhancement of the systems response can be achieved when the noise is directly added into the nonlinearity.
Resonance phenomena in a nonlinear neuronal circuit
2015
International audience; We characterizes a nonlinear circuit driven by a bichromatic excitation,that is the sum of two sinusoidal waves with different frequencies f1 and f2 suchthat f2 > f1. Our experiments are confirmed by a numerical analysis of the systemresponse obtained by solving numerically the differential equations which rule thecircuit voltages. Especially, we highlight that the response of the system at the lowfrequency can be optimized by the amplitude of the high frequency. By revisiting thiswell known vibrational resonance effect in the whole amplitude frequency parametricplane, we show experimentally and numerically that a much better resonance can beachieved when the two fre…
Image Encryption/Decryption system based on an oscillatory cellular nonlinear network
2008
International audience
La résonance cohérente : amélioration de la régularité de la réponse d’un système non linéaire par le bruit
2015
National audience; Cette communication est consacrée à l’étude expérimentale du comportement d’un circuit électronique non linéaire du type FitzHugh-Nagumo soumis exclusivement à du bruit. En l’absence de bruit, le circuit est paramétré en mode excitable près de la bifurcation d’Andronov-Hopf. Cette dernière se manifeste par un changement du fonctionnement du circuit qui devient oscillant. Nous montrons que le circuit peut utiliser le bruit pour déclencher des ondes du type potentiels d’action. Ce déclenchement atteint une régularité qui peut être maximisée pour une quantité appropriée de bruit via le phénomène de Résonance Cohérente.