Zobrazeno 1 - 10
of 740
pro vyhledávání: '"Burioni R"'
We perform accurate numerical experiments with fully-connected (FC) one-hidden layer neural networks trained with a discretized Langevin dynamics on the MNIST and CIFAR10 datasets. Our goal is to empirically determine the regimes of validity of a rec
Externí odkaz:
http://arxiv.org/abs/2401.11004
Feature learning, or the ability of deep neural networks to automatically learn relevant features from raw data, underlies their exceptional capability to solve complex tasks. However, feature learning seems to be realized in different ways in fully-
Externí odkaz:
http://arxiv.org/abs/2307.11807
Autor:
Kordas, G., Witthaut, D., Buonsante, P., Vezzani, A., Burioni, R., Karanikas, A. I., Wimberger, S.
Publikováno v:
Eur. Phys. J. Special Topics 224, 2127-2171 (2015)
Open many-body quantum systems have attracted renewed interest in the context of quantum information science and quantum transport with biological clusters and ultracold atomic gases. The physical relevance in many-particle bosonic systems lies in th
Externí odkaz:
http://arxiv.org/abs/1510.00127
Publikováno v:
Phys. Rev. E 93, 012305 (2016)
We study the dynamics of networks with inhibitory and excitatory leaky-integrate-and-fire neurons with short-term synaptic plasticity in the presence of depressive and facilitating mechanisms. The dynamics is analyzed by a Heterogeneous Mean-Field ap
Externí odkaz:
http://arxiv.org/abs/1507.08183
Publikováno v:
Commun. Theor. Phys. 62, 514 (2014)
We consider a broad class of Continuous Time Random Walks with large fluctuations effects in space and time distributions: a random walk with trapping, describing subdiffusion in disordered and glassy materials, and a L\'evy walk process, often used
Externí odkaz:
http://arxiv.org/abs/1409.8078
Publikováno v:
J. Stat. Mech. (2013) P09022
We show that, in a broad class of continuous time random walks (CTRW), a small external field can turn diffusion from standard into anomalous. We illustrate our findings in a CTRW with trapping, a prototype of subdiffusion in disordered and glassy ma
Externí odkaz:
http://arxiv.org/abs/1212.1447
Publikováno v:
Phys. Rev. E 86, 055101(R) (2012)
We study reaction-diffusion processes on graphs through an extension of the standard reaction-diffusion equation starting from first principles. We focus on reaction spreading, i.e. on the time evolution of the reaction product, M(t). At variance wit
Externí odkaz:
http://arxiv.org/abs/1211.6916
Publikováno v:
Phys. Rev. E 86, 031125 (2012)
We study the effects of scattering lengths on L\'evy walks in quenched one-dimensional random and fractal quasi-lattices, with scatterers spaced according to a long-tailed distribution. By analyzing the scaling properties of the random-walk probabili
Externí odkaz:
http://arxiv.org/abs/1206.0856
Publikováno v:
Physical Review A 85, 043625 (2012)
In this paper we consider a bosonic Josephson junction described by a two-mode Bose-Hubbard model, and we thoroughly analyze a quantum phase transition occurring in the system in the limit of infinite bosonic population. We discuss the relation betwe
Externí odkaz:
http://arxiv.org/abs/1112.3816
Publikováno v:
J. Stat. Mech. (2010) P12024
We study numerically the non-equilibrium critical properties of the Ising model defined on direct products of graphs, obtained from factor graphs without phase transition (Tc = 0). On this class of product graphs, the Ising model features a finite te
Externí odkaz:
http://arxiv.org/abs/1012.3852