Results 31 to 40 of about 1,136,044 (78)

Gyrokinetics from variational averaging: existence and error bounds

open access: yes, 2017
The gyrokinetic paradigm in the long wavelength regime is reviewed from the perspective of variational averaging (VA). The VA-method represents a third pillar for averaging kinetic equations with highly-oscillatory characteristics, besides classical ...
Possanner, Stefan
core   +1 more source

Short-time homomorphic wavelet estimation

open access: yes, 2013
Successful wavelet estimation is an essential step for seismic methods like impedance inversion, analysis of amplitude variations with offset and full waveform inversion.
Herrera R van der Baan M   +6 more
core   +1 more source

Electromagnetic energy and energy flows in photonic crystals made of arrays of parallel dielectric cylinders

open access: yes, 2004
We consider the electromagnetic propagation in two-dimensional photonic crystals, formed by parallel dielectric cylinders embedded a uniform medium.
A. Yariv   +8 more
core   +1 more source

Accelerated method of finding for the minimum of arbitrary Lipschitz convex function

open access: yes, 2019
The goal of the paper is development of an optimization method with the superlinear convergence rate for an arbitrary convex function. For optimization an approximation is used that is similar to the Steklov integral averaging.
Prudnikov, I. M.
core  

Direct integrals and spectral averaging [PDF]

open access: yes, 2010
A one parameter family of selfadjoint operators gives rise to a corresponding direct integral. We show how to use the Putnam Kato theorem to obtain a new method for the proof of a spectral averaging ...
Krishna, M., Stollmann, P.
core   +2 more sources

A generalized averaging method for linear differential equations with almost periodic coefficients [PDF]

open access: yes
Generalized averaging method for linear differential equations with almost periodic ...
Coakley, T. J.
core   +1 more source

Cell averaging Chebyshev methods for hyperbolic problems [PDF]

open access: yes
A cell averaging method for the Chebyshev approximations of first order hyperbolic equations in conservation form is described. Formulas are presented for transforming between pointwise data at the collocation points and cell averaged quantities, and ...
Gottlieb, David, Harten, Ami, Wei, Cai
core   +1 more source

Averaged initial Cartesian coordinates for long lifetime satellite studies [PDF]

open access: yes
A set of initial Cartesian coordinates, which are free of ambiguities and resonance singularities, is developed to study satellite mission requirements and dispersions over long lifetimes. The method outlined herein possesses two distinct advantages over
Pines, S.
core   +1 more source

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