Results 281 to 290 of about 7,875,654 (350)

Study of phase separation process in multi-component mixtures using analytical methods and decomposition variational iteration method for the fourth-order Cahn-Hilliard equation. [PDF]

Sci Rep
Luo J, Manafian J, Aghazadeh A, Ilhan OA, Eslami B, Fattah AA, Mahmoud KH, Aghdaei MF.   +7 more
europepmc   +1 more source

Comparative Evaluation of Allometric, Machine Learning, and Ensemble Approaches for Modeling Dynamic Structure-Fresh Weight Relationships in Sweet Pepper. [PDF]

Plants (Basel)
Kang JH, Moon T.
europepmc   +1 more source

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Minimax Inequalities and Variational Equations

World Congress on Global Optimization, 2019
In this paper we study some weak conditions guaranteeing the validity of several minimax inequalities and illustrate the possibilities of such a tool for characterizing the existence of solutions of certain variational equations.
M. I. Berenguer, D. Gámez, A. Guillem, M. R. Galán   +3 more
semanticscholar   +2 more sources

A Variational Complex for Difference Equations

Foundations of Computational Mathematics, 2004
The authors state and prove an analogue of the Poincaré lemma for exact forms on a lattice. From the results, a variational complex for difference equations is constructed and, furthermore, it is proved to be locally exact. In order to calculate the Lagrangians for discrete Euler-Lagrange systems, homotopy maps are applied.
Peter E. Hydon, Elizabeth L. Mansfield
openaire   +2 more sources

A general numerical algorithm for nonlinear differential equations by the variational iteration method

, 2020
The purpose of this paper is to suggest a general numerical algorithm for nonlinear problems by the variational iteration method (VIM).,Firstly, the Laplace transform technique is used to reconstruct the variational iteration algorithm-II.
Ji-Huan He, Habibolla Latifizadeh
semanticscholar   +1 more source

Second-Order Integral-Form Gauss’s Variational Equations Under Impulsive Control

Journal of Guidance Control and Dynamics, 2019
Second-order integral-form Gauss’s variational equations (GVEs) under impulsive control are derived for both nonsingular orbital elements and classical orbital elements.
Gang Zhang, D. Mortari
semanticscholar   +1 more source

Variational Inference for Stochastic Differential Equations

Annals of Physics, 2019
The statistical inference of the state variable and the drift function of stochastic differential equations (SDE) from sparsely sampled observations are discussed herein.
M. Opper
semanticscholar   +1 more source

Generalization of Noether’s Theorem in Modern Form to Non-variational Partial Differential Equations

, 2016
A general method using multipliers for finding the conserved integrals admitted by any given partial differential equation (PDE) or system of partial differential equations is reviewed and further developed in several ways.
S. Anco
semanticscholar   +1 more source

Kinetic Equations and Variational Principles

SIAM Journal on Numerical Analysis, 1981
The paper presents a method of symmetrization of the time-dependent neutron transport equation by which the original problem and its adjoins are reduced to one self-adjoins problem. For the latter, a variational principle based on minimization of the quadratic functional is formulated.A study is made of some properties of the problem’s operators, the ...
Marchuk, G. I., Agoshkov, V. I.
openaire   +2 more sources