Results 251 to 260 of about 1,361,716 (290)
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Nuclear Resonance Vibrational Spectroscopy – NRVS
Journal of Inorganic Biochemistry, 2005The recent, synchrotron-based vibrational technique nuclear resonance vibrational spectroscopy (NRVS) is introduced. The method can be used for a number of Mössbauer active isotopes including 57Fe, which has yielded most of the results to date. The NRVS experiment can be thought of as Mössbauer spectroscopy with vibrational sidebands.
Stephen M Durbin +2 more
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Nonlinear vibrational resonance
Physical Review E, 2013We examine the nonlinear response of a bistable system driven by a high-frequency force to a low-frequency weak field. It is shown that the rapidly varying temporal oscillation breaks the spatial symmetry of the centrosymmetric potential. This gives rise to a finite nonzero response at the second harmonic of the low-frequency field, which can be ...
Shyamolina, Ghosh, Deb Shankar, Ray
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Chaos, Solitons and Fractals, 2021 International audienceThis work numerically investigates the dynamics of a Chua’s circuit model experiencing a truncated sinusoidal force and driven by an external perturbed excitation.
Saverio Morfu, P Marquie
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Vibrational resonance in neuron populations
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2010In this paper different topologies of populations of FitzHugh–Nagumo neurons have been introduce to investigate the effect of high-frequency driving on the response of neuron populations to a subthreshold low-frequency signal. We show that optimal amplitude of high-frequency driving enhances the response of neuron populations to a subthreshold low ...
Deng, B +4 more
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Vibrational resonance in feedforward network
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2011This paper investigates vibrational resonance in multi-layer feedforward network (FFN) based on FitzHugh-Nagumo (FHN) neuron model. High-frequency stimuli can improve the input-output linearity of firing rates, especially for the inputs with low firing rate. For FFN network, it is found that high-frequency disturbances play important roles in enhancing
Ying-mei, Qin +4 more
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Vibrational resonance in a noise-induced structure
Physical Review E, 2002We report on the effect of vibrational resonance in a spatially extended system of coupled noisy oscillators under the action of two periodic forces, a low-frequency one (signal) and a high-frequency one (carrier). Vibrational resonance manifests itself in the fact that for optimally selected values of high-frequency force amplitude, the response of ...
Zaikin, Alexei A. +4 more
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Stochastic Resonance in Electromechanical Vibrating Systems
Journal of the Physical Society of Japan, 2020Electromechanical systems are often subjected to mechanical stress and vibrations which deeply influence their overall behavior, and nonlinear effects are predominant in such class of physical systems. The main objective of this short note is to propose evidence of stochastic resonance behavior in complex electromechanical devices, where noisy ...
Bucolo, M +3 more
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Frequency-resonance-enhanced vibrational resonance in bistable systems
Physical Review E, 2011The dynamics in an overdamped bistable system subject to the action of two periodic forces (assuming their frequencies are ω and Ω, and amplitudes are A and B, respectively) is studied. For the usual vibrational resonance, the nonmonotonic dependence of signal output of the low frequency ω on the change of B for a fixed Ω, the condition Ω≫ω is always ...
Chenggui, Yao, Yan, Liu, Meng, Zhan
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Vibrational resonance and vibrational propagation in excitable systems
Physics Letters A, 2003We report the occurrence of vibrational resonance in excitable systems. Namely, we show that an optimal amplitude of the high-frequency driving enhances the response of an excitable system to a low-frequency signal. The phenomenon is confirmed in an excitable electronic circuit and in the FitzHugh-Nagumo model.
E. Ullner +4 more
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The Journal of the Acoustical Society of America, 1964
The algebraic expressions given by earlier workers are used to compute the properties of longitudinally resonant cones. From the results, it is suggested that conical vibrators, driven by “stepped” amplitude transformers, would make useful resonators for fairly large amplitude.
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The algebraic expressions given by earlier workers are used to compute the properties of longitudinally resonant cones. From the results, it is suggested that conical vibrators, driven by “stepped” amplitude transformers, would make useful resonators for fairly large amplitude.
openaire +2 more sources