Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Margazoglou, Georgios"'
Publikováno v:
Chaos 33, 093107 (2023)
The forecasting and computation of the stability of chaotic systems from partial observations are tasks for which traditional equation-based methods may not be suitable. In this computational paper, we propose data-driven methods to (i) infer the dyn
Externí odkaz:
http://arxiv.org/abs/2305.15111
Autor:
Margazoglou, Georgios, Magri, Luca
Systems with time-delayed chaotic dynamics are common in nature, from control theory to aeronautical propulsion. The overarching objective of this paper is to compute the stability properties of a chaotic dynamical system, which is time-delayed. The
Externí odkaz:
http://arxiv.org/abs/2303.03112
We present the Physics-Informed Long Short-Term Memory (PI-LSTM) network to reconstruct and predict the evolution of unmeasured variables in a chaotic system. The training is constrained by a regularization term, which penalizes solutions that violat
Externí odkaz:
http://arxiv.org/abs/2302.10779
Autor:
Margazoglou, Georgios, Magri, Luca
The prediction of the temporal dynamics of chaotic systems is challenging because infinitesimal perturbations grow exponentially. The analysis of the dynamics of infinitesimal perturbations is the subject of stability analysis. In stability analysis,
Externí odkaz:
http://arxiv.org/abs/2210.06167
Autor:
Margazoglou, Georgios, Biferale, Luca, Cencini, Massimo, Gallavotti, Giovanni, Lucarini, Valerio
Publikováno v:
Phys. Rev. E 105, 065110, (2022)
At the molecular level fluid motions are, by first principles, described by time reversible laws. On the other hand, the coarse grained macroscopic evolution is suitably described by the Navier-Stokes equations, which are inherently irreversible, due
Externí odkaz:
http://arxiv.org/abs/2201.00530
We study the impact of applying stochastic forcing to the Ghil-Sellers energy balance climate model in the form of a fluctuating solar irradiance. Through numerical simulations, we explore the noise-induced transitions between the competing warm and
Externí odkaz:
http://arxiv.org/abs/2110.10793
We apply two independent data analysis methodologies to locate stable climate states in an intermediate complexity climate model and analyze their interplay. First, drawing from the theory of quasipotentials, and viewing the state space as an energy
Externí odkaz:
http://arxiv.org/abs/2010.10374
We present a new method for sampling rare and large fluctuations in a non-equilibrium system governed by a stochastic partial differential equation (SPDE) with additive forcing. To this end, we deploy the so-called instanton formalism that correspond
Externí odkaz:
http://arxiv.org/abs/1812.03543
Publikováno v:
Phys. Rev. E 98, 023104 (2018)
We compare different approaches towards an effective description of multi-scale velocity field correlations in turbulence. Predictions made by the operator product expansion, the so-called fusion rules, are placed in juxtaposition to an approach that
Externí odkaz:
http://arxiv.org/abs/1804.09200
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