Results 11 to 20 of about 747,493 (287)

Continuum methods in lattice perturbation theory [PDF]

open access: yes, 2002
We show how methods of continuum perturbation theory can be used to simplify perturbative lattice calculations. We use the technique of asymptotic expansions to expand lattice loop integrals around the continuum limit. After the expansion, all nontrivial
Becher   +10 more
core   +3 more sources

Parallel Perturbed Gauss-Newton State Estimator Based on Fortescue Transformation for Unbalanced Power Systems

open access: yesJournal of Modern Power Systems and Clean Energy, 2022
This letter extends the complex-variable perturbed Gauss-Newton method to estimate the state of unbalanced power systems by exploiting the Fortescue transformation.
Izudin Dzafic
doaj   +1 more source

Asymptotic solution of the mathematical model of nonlinear oscillations of absolutely elastic inextensible weightless string

open access: yesNonlinear Analysis, 2010
The mathematical model of nonlinear oscillations of weightless string is analyzed. To find an asymptotic solution of the problem, uniformly valid in a long interval of time, an averaged system of integral differential equations has been constructed.
A. Krylovas   +2 more
doaj   +1 more source

Perturbative subtraction methods [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 2000
Talk presented at LATTICE99(algorithms)
openaire   +2 more sources

Numerical Methods for Singular Perturbation Problems [PDF]

open access: yes, 1981
Consider the two-point boundary value problem for a stiff system of ordinary differential equations.
Kreiss, Barbro, Kreiss, Heinz-Otto
core   +1 more source

Kruskal's Perturbation Method [PDF]

open access: yesJournal of Mathematical Physics, 1970
A general method for eliminating the angle variable from the equations of a perturbed periodic motion and for deriving an ``adiabatic invariant'' J has been given by Kruskal and, for a special class of Hamiltonian systems, McNamara and Whiteman have shown (to order ε2) that J is related to a set of invariants I obtained from the expansion of Poisson ...
openaire   +1 more source

A Phase Transistion in the Water Coupled to a Local External Perturbation [PDF]

open access: yes, 1999
A flux of ideal fluid coupled to perturbation is investigated by nonperturbative methods of the quantum field theory. Asymptotic behavior of the flux coupled to perturbation turns out to be similiar to that of superfluids.Comment: 17 pages, 5 figures ...
Brezin   +13 more
core   +2 more sources

Random Force Perturbations: A New Extension of the Cell Perturbation Method for Turbulence Generation in Multiscale Atmospheric Boundary Layer Simulations

open access: yesJournal of Advances in Modeling Earth Systems, 2019
Coupling between mesoscale and large eddy simulation (LES) is critically important for many atmospheric model applications, from predictions of wind energy to fire propagation.
L. J. Mazzaro   +4 more
doaj   +1 more source

The vibration of nanobeam resting on elastic foundation using modified couple stress theory

open access: yesTehnički Glasnik, 2018
In this paper, the vibration of nanobeams resting on the Winkler foundation is proposed using the modified couple stress theory. Hamilton’s principle is utilized to construct the governing equations.
Necla Togun, Süleyman M. Bağdatli
doaj   +1 more source

Dissipative Capture of Planets into First-order Mean-motion Resonances

open access: yesThe Astrophysical Journal Letters, 2023
The emergence of orbital resonances among planets is a natural consequence of the early dynamical evolution of planetary systems. While it is well established that convergent migration is necessary for mean-motion commensurabilities to emerge, recent ...
Konstantin Batygin, Antoine C. Petit
doaj   +1 more source

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