Results 31 to 40 of about 5,911,268 (324)

Critical Response of Single-Degree-of-Freedom Damped Bilinear Hysteretic System under Double Impulse As Substitute for Near-Fault Ground Motion

open access: yesFrontiers in Built Environment, 2018
A double impulse input is used as a substitute for near-fault earthquake ground motions. An explicit expression is derived on the maximum elastic–plastic response of a single-degree-of-freedom damped structure with bilinear hysteresis under the “critical
Hiroki Akehashi   +2 more
doaj   +1 more source

Critical properties of quantum three- and four-state Potts models with boundaries polarized along the transverse field

open access: yesSciPost Physics Core, 2022
By computing the low-lying energy excitation spectra with the density matrix renormalization group algorithm we show that boundaries polarized in the direction of the transverse field lead to scale-invariant conformal towers of states at the critical ...
Natalia Chepiga
doaj   +1 more source

Safe Model-Based Reinforcement Learning for Systems With Parametric Uncertainties

open access: yesFrontiers in Robotics and AI, 2021
Reinforcement learning has been established over the past decade as an effective tool to find optimal control policies for dynamical systems, with recent focus on approaches that guarantee safety during the learning and/or execution phases.
S. M. Nahid Mahmud   +3 more
doaj   +1 more source

High pressure effects on the excitation spectra and dipole properties of Li, Be+, and B2+ atoms under confinement

open access: yesMatter and Radiation at Extremes, 2020
Properties of atoms and molecules undergo significant changes when subjected to spatial confinement. We study the excitation spectra of lithium-like atoms in the initial 1s22s electronic configuration when confined by an impenetrable spherical cavity. We
C. Martínez-Flores, R. Cabrera-Trujillo
doaj   +1 more source

Hopf Bifurcation in Mean Field Explains Critical Avalanches in Excitation-Inhibition Balanced Neuronal Networks: A Mechanism for Multiscale Variability [PDF]

open access: yesFrontiers in Systems Neuroscience, 2020
Cortical neural circuits display highly irregular spiking in individual neurons but variably sized collective firing, oscillations and critical avalanches at the population level, all of which have functional importance for information processing ...
Junhao Liang   +2 more
semanticscholar   +1 more source

Jamming Criticality Revealed by Removing Localized Buckling Excitations

open access: yesPhysical Review Letters, 2015
Recent theoretical advances offer an exact, first-principle theory of jamming criticality in infinite dimension as well as universal scaling relations between critical exponents in all dimensions. For packings of frictionless spheres near the jamming transition, these advances predict that nontrivial power-law exponents characterize the critical ...
Charbonneau, Patrick   +3 more
openaire   +5 more sources

Excitation and entanglement transfer near quantum critical points [PDF]

open access: yesOptics and Spectroscopy, 2007
submitted to Optics and Spectroscopy special issue for ICQO ...
Hartmann, Michael J.   +2 more
openaire   +2 more sources

Critical excitation-inhibition balance in dense neural networks [PDF]

open access: yesPhysical Review E, 2019
The "edge of chaos" phase transition in artificial neural networks is of renewed interest in light of recent evidence for criticality in brain dynamics. Statistical mechanics traditionally studied this transition with connectivity $k$ as the control parameter and an exactly balanced excitation-inhibition ratio.
Baumgarten, Lorenz, Bornholdt, Stefan
openaire   +3 more sources

Field-angle anisotropy of proximate Kitaev systems under an in-plane magnetic field

open access: yesPhysical Review Research, 2021
We have investigated the field-angle behaviors of magnetic excitations under an in-plane magnetic field for proximate Kitaev systems. By employing the exact diagonalization method in conjunction with the linear spin wave theory, we have demonstrated that
Beom Hyun Kim
doaj   +1 more source

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