Results 21 to 30 of about 150,922 (283)

Approximate Solution of a Reduced-Type Index-k Hessenberg Differential-Algebraic Control System

open access: yesJournal of Applied Mathematics, 2021
This study focuses on developing an efficient and easily implemented novel technique to solve the index-k Hessenberg differential-algebraic equation (DAE) with input control.
Ghazwa F. Abd, Radhi A. Zaboon
doaj   +1 more source

Variational approach in weighted Sobolev spaces to scattering by unbounded rough surfaces [PDF]

open access: yes, 2009
We consider the problem of scattering of time harmonic acoustic waves by an unbounded sound soft surface which is assumed to lie within a finite distance of some plane.
Chandler-Wilde, Simon Neil, Elschner, J
core   +2 more sources

Differential geometry, Palatini gravity and reduction [PDF]

open access: yes, 2013
The present article deals with a formulation of the so called (vacuum) Palatini gravity as a general variational principle. In order to accomplish this goal, some geometrical tools related to the geometry of the bundle of connections of the frame bundle $
Baez J.   +17 more
core   +2 more sources

Mixed type symmetric and self duality for multiobjective variational problems with support functions [PDF]

open access: yesYugoslav Journal of Operations Research, 2013
In this paper, a pair of mixed type symmetric dual multiobjective variational problems containing support functions is formulated. This mixed formulation unifies two existing pairs Wolfe and Mond-Weir type symmetric dual multiobjective variational ...
Husain I., Mattoo Rumana G.
doaj   +1 more source

A Variational Formulation for the Multilayer Perceptron [PDF]

open access: yes, 2006
In this work we present a theory of the multilayer perceptron from the perspective of functional analysis and variational calculus. Within this formulation, the learning problem for the multilayer perceptron lies in terms of finding a function which is an extremal for some functional.
Roberto Lopez, Eugenio Oñate
openaire   +2 more sources

Some Variational Principles for Coupled Thermoelasticity

open access: yesJournal of Engineering, 2013
The nonlinear thermoelasticity of type II proposed by Green and Naghdi is considered. The thermoelastic structural model is formulated in a quasistatic range, and the related thermoelastic variational formulation in the complete set of state variables is
Francesco Marotti de Sciarra
doaj   +1 more source

Hamiltonian Variational Formulation of Three-Dimensional, Rotational Free-Surface Flows, with a Moving Seabed, in the Eulerian Description

open access: yesFluids, 2022
Hamiltonian variational principles have provided, since the 1960s, the means of developing very successful wave theories for nonlinear free-surface flows, under the assumption of irrotationality.
Constantinos P. Mavroeidis   +1 more
doaj   +1 more source

Variational Integrators and the Newmark Algorithm for Conservative and Dissipative Mechanical Systems [PDF]

open access: yes, 1999
The purpose of this work is twofold. First, we demonstrate analytically that the classical Newmark family as well as related integration algorithms are variational in the sense of the Veselov formulation of discrete mechanics.
Armero   +40 more
core   +3 more sources

Variational formulations for non-linear problems with independent rotational degrees of freedom

open access: yesИнженерно-строительный журнал, 2015
We consider the geometrically and physically nonlinear theory of elastic rods (Cosserat – Timoshenko rods) and the elastic Cosserat medium. These theories consider independent translational and rotational degrees of freedom.
V.V. Lalin   +3 more
doaj   +1 more source

A variational formulation of the polarizable continuum model [PDF]

open access: yesThe Journal of Chemical Physics, 2010
Continuum solvation models are widely used to accurately estimate solvent effects on energy, structural and spectroscopic properties of complex molecular systems. The polarizable continuum model (PCM) is one of the most versatile among the continuum models because of the variety of properties that can be computed and the diversity of methods that can ...
Lipparini, Filippo   +5 more
openaire   +3 more sources

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