Zobrazeno 1 - 10
of 203
pro vyhledávání: '"Rizzato, F"'
Understanding the role of regularization is a central question in Statistical Inference. Empirically, well-chosen regularization schemes often dramatically improve the quality of the inferred models by avoiding overfitting of the training data. We co
Externí odkaz:
http://arxiv.org/abs/2112.01292
Akademický článek
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Publikováno v:
Phys. Rev. E 88, 064901 (2013)
We analyze the dynamics of a relativistic particle moving in a uniform magnetic field and perturbed by a standing electrostatic wave. We show that a pulsed wave produces an infinite number of perturbative terms with the same winding number, which may
Externí odkaz:
http://arxiv.org/abs/1306.2682
Publikováno v:
Phys. Rev. E 86, 016217 (2012)
We analyze the behavior of a relativistic particle moving under the influence of a uniform magnetic field and a stationary electrostatic wave. We work with a set of pulsed waves that allows us to obtain an exact map for the system. We also use a meth
Externí odkaz:
http://arxiv.org/abs/1110.1871
Publikováno v:
Phys.Rev.E82:026402,2010
We investigate the concept of a standard map for the interaction of relativistic particles and electrostatic waves of arbitrary amplitudes, under the action of external magnetic fields. The map is adequate for physical settings where waves and partic
Externí odkaz:
http://arxiv.org/abs/1007.5360
Autor:
de Oliveira, G. I., Rizzato, F. B.
Publikováno v:
Phys. Rev. E 77, 016607 (2008)
In the present analysis we study the transition from coherent to incoherent dynamics in a nonlinear triplet of broad band combs of waves. Expanding the analysis of previous works, this paper investigates what happens when the band of available modes
Externí odkaz:
http://arxiv.org/abs/0801.4850
In this work we investigate the validity limits of the modulational approximation as a method to describe the nonlinear interaction of conservative wave fields. We focus on a nonlinear Klein-Gordon equation and suggest that the breakdown of the appro
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9905040
In this work we analyze the interaction of isolated solitary structures and ion-acoustic radiation. If the radiation amplitude is small solitary structures persists, but when the amplitude grows energy transfer towards small spatial scales occurs. We
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9805026
Autor:
Corso, G., Rizzato, F. B.
In this paper we extend the concept of separatrix reconnection into chaotic regimes. We show that even under chaotic conditions one can still understand abrupt jumps of diffusive-like processes in the relevant phase-space in terms of relatively smoot
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9801008
Autor:
Lopes, S. R., Rizzato, F. B.
In this paper we examine the spatio-temporal dynamics of two nonlinearly coupled wave triplets sharing two common modes. Our basic findings are the following. When spatial dependence is absent, the homogeneous manifold so obtained can be chaotic or r
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9801009