Results 1 to 10 of about 166,500 (329)

Computational singular perturbation analysis of brain lactate metabolism. [PDF]

open access: yesPLoS ONE, 2019
Lactate in the brain is considered an important fuel and signalling molecule for neuronal activity, especially during neuronal activation. Whether lactate is shuttled from astrocytes to neurons or from neurons to astrocytes leads to the contradictory ...
Dimitris G Patsatzis   +3 more
doaj   +2 more sources

Entanglement entropy of singular surfaces under relevant deformations in holography

open access: yesJournal of High Energy Physics, 2018
In the vacuum state of a CFT, the entanglement entropy of singular surfaces contains a logarithmic universal term which is only due to the singularity of the entangling surface.
Mostafa Ghasemi, Shahrokh Parvizi
doaj   +3 more sources

Motion control and singular perturbation algorithms for lower limb rehabilitation robots [PDF]

open access: yesFrontiers in Neurorobotics
To better assist patients with lower limb injuries in their rehabilitation training, this paper focuses on motion control and singular perturbation algorithms and their practical applications.
Yanchun Xie   +5 more
doaj   +2 more sources

A Second-Order Singular Perturbation for Model Simplification for a Microgrid

open access: yesEnergies, 2023
As the integration of electronic-interfaced devices have increased, microgrid models have become too complex to perform a stability analysis. Thus, an effective model simplification method keeping most dynamics of the system becomes very essential ...
Xiao-Qi Yin, Bao-Shun Yang, Jun Tao
doaj   +1 more source

Long Wavelength Coherency in Well Connected Electric Power Networks

open access: yesIEEE Access, 2022
We investigate coherent oscillations in large scale transmission power grids, where large groups of generators respond in unison to a distant disturbance. Such long wavelength coherent phenomena are known as inter-area oscillations.
Julian Fritzsch, Philippe Jacquod
doaj   +1 more source

Singular anisotropic equations with a sign-changing perturbation

open access: yesNonlinear Analysis, 2023
We consider an anisotropic Dirichlet problem driven by the variable (p, q)-Laplacian (double phase problem). In the reaction, we have the competing effects of a singular term and of a superlinear perturbation. Contrary to most of the previous papers, we
Zhenhai Liu, Nikolaos S. Papageorgiou
doaj   +1 more source

Convergence for Hyperbolic Singular Perturbation of Integrodifferential Equations

open access: yesJournal of Inequalities and Applications, 2007
By virtue of an operator-theoretical approach, we deal with hyperbolic singular perturbation problems for integrodifferential equations. New convergence theorems for such singular perturbation problems are obtained, which generalize some previous results
Jin Liang, Ti-Jun Xiao, James Liu
doaj   +2 more sources

The Super-Diffusive Singular Perturbation Problem

open access: yesMathematics, 2020
In this paper we study a class of singularly perturbed defined abstract Cauchy problems.
Edgardo Alvarez, Carlos Lizama
doaj   +1 more source

Singular perturbations and singular arcs. I [PDF]

open access: yesIEEE Transactions on Automatic Control, 1975
Singular perturbation theory is applied to obtain the asymptotic solution for the nearly singular optimal control of a constant linear system on a finite time interval In the limit as the control cost is reduced to zero, the initial control is found to have an impulse-like behavior, while the outer solution agrees asymptotically with the familiar ...
O'Malley, Robert E. jun.   +1 more
openaire   +3 more sources

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