Results 31 to 40 of about 887,215 (364)

Mimetic Attractors [PDF]

open access: yesInternational Journal of Theoretical Physics, 2015
In this paper, we investigate the mathematical modeling for the cosmological attractors propagated in mimetic gravity upon which an interacting dark energy-dark matter is supposed to be existed. The average value of the interaction of these percentages, namely $ _i$ say, may be used to investigate generally the modeling of an attractor; the actual ...
Kairat Myrzakulov   +3 more
openaire   +2 more sources

Pullback attractor for a nonautonomous parabolic Cahn-Hilliard phase-field system

open access: yesAIMS Mathematics, 2023
Our aim in this paper is to study generalizations of the Caginalp phase-field system based on a thermomechanical theory involving two temperatures and a nonlinear coupling. In particular, we prove well-posedness results.
Jean De Dieu Mangoubi   +2 more
doaj   +1 more source

Attractor behaviour in multifield inflation [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2018
We study multifield inflation in scenarios where the fields are coupled non-minimally to gravity via ξI(ϕI)n gμνRμν, where ξI are coupling constants, ϕI the fields driving inflation, gμν the space-time metric, Rμν the Ricci tensor, and n>0.
P. Carrilho   +3 more
semanticscholar   +1 more source

Irregular Attractors [PDF]

open access: yesDiscrete Dynamics in Nature and Society, 1998
In this paper the definition of attractor of a dissipative dynamical system is introduced. The classification of the existing types of attractors and the analysis of their characteristics are presented. The discussed problems are illustrated by the results of numerical simulations using a number of real examples that provides the possibility to ...
Vadim S. Anishchenko   +1 more
openaire   +2 more sources

POLYMODALITY OF SECONDARY KAOLINITE DISTRIBUTION IN OPEN SANDY RESERVOIR SYSTEMS

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2023
Link for citation: Melnik I.A. Polymodality of secondary kaolinite distribution in open sandy reservoir systems. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 8, рр. 17-29. In Rus. Relevance.
Igor A. Melnik
doaj   +1 more source

The Neuroanatomical Ultrastructure and Function of a Biological Ring Attractor

open access: yesNeuron, 2019
Neural representations of head direction have been discovered in many different species. A large body of theoretical work has proposed that the dynamics associated with these representations might be generated, maintained, and updated by recurrent ...
D. Turner-Evans   +8 more
semanticscholar   +1 more source

The non-equilibrium attractor for kinetic theory in relaxation time approximation [PDF]

open access: yesJournal of High Energy Physics, 2018
I demonstrate that the concept of a non-equilibrium attractor can be extended beyond the lowest-order moments typically considered in hydrodynamic treatments.
M. Strickland
semanticscholar   +1 more source

Toward the Relational Formulation of Biological Thermodynamics

open access: yesEntropy, 2023
Classical thermodynamics employs the state of thermodynamic equilibrium, characterized by maximal disorder of the constituent particles, as the reference frame from which the Second Law is formulated and the definition of entropy is derived.
Abir U. Igamberdiev
doaj   +1 more source

Constrained attractor selection using deep reinforcement learning [PDF]

open access: yesJournal of Vibration and Control, 2019
This study describes an approach for attractor selection (or multistability control) in nonlinear dynamical systems with constrained actuation. Attractor selection is obtained using two different deep reinforcement learning methods: (1) the cross-entropy
Xue-She Wang, J. Turner, B. Mann
semanticscholar   +1 more source

New universal attractor in nonminimally coupled gravity: Linear inflation [PDF]

open access: yesPhysical Review D, 2018
Once quantum corrections are taken into account, the strong coupling limit of the $\xi$-attractor models (in metric gravity) might depart from the usual Starobinsky solution and move into linear inflation.
A. Racioppi
semanticscholar   +1 more source

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