Results 21 to 30 of about 159,062 (288)

Genetic algorithm shape optimization to manipulate the nonlinear response of a clamped-clamped beam

open access: yesHeliyon, 2022
Dynamical systems, which are described by differential equations, can have an enhanced response because of their nonlinearity. As one example, the Duffing oscillator can exhibit multiple stable vibratory states for some external forcing frequencies ...
Tushar Mollik   +4 more
doaj   +1 more source

Lie group classification of first-order delay ordinary differential equations

open access: yes, 2017
A group classification of first-order delay ordinary differential equation (DODE) accompanied by an equation for delay parameter (delay relation) is presented.
Dorodnitsyn, Vladimir A.   +3 more
core   +1 more source

The existence and approximation of the periodic solution of a system of nonlinear differential-differential equations of the first order with independent variable delay with boundary conditions [PDF]

open access: yesمجلة التربية والعلم, 2007
In this paper we study the existence and approximation of the solutions for some systems of nonlinear integro-differential equations with having retarded arguments and boundary conditions. The numerical–analytic method has been used to study the periodic
Raad Putrus, Ann Isaac
doaj   +1 more source

Numerical solving of coupled systems of parabolic and ordinary differential equations

open access: yesNonlinear Analysis, 2010
Two coupled systems of parabolic and nonlinear ordinary differential equations arising in kinetics of heterogeneous reactions are studied numerically by using computer calculations. Some numerical results are discussed.
V. Skakauskas, P. Katauskis
doaj   +1 more source

Existence of a periodic solutions for certain system of nonlinear integro-differential equations [PDF]

open access: yesمجلة التربية والعلم, 2008
In this paper we investigate the existence and approximation of the periodic solutions for certain systems of nonlinear integro-differential equations, by using the method of successive periodic approximation of ordinary differential equations which is ...
R. Butris
doaj   +1 more source

Nonparametric Uncertainty Quantification for Stochastic Gradient Flows [PDF]

open access: yes, 2015
This paper presents a nonparametric statistical modeling method for quantifying uncertainty in stochastic gradient systems with isotropic diffusion. The central idea is to apply the diffusion maps algorithm to a training data set to produce a stochastic ...
Berry, Tyrus, Harlim, John
core   +1 more source

On Exact Controllability of First-Order Impulsive Differential Equations

open access: yesAdvances in Difference Equations, 2010
Many dynamical systems have an impulsive dynamical behavior due to abrupt changes at certain instants during the evolution process. The mathematical description of these phenomena leads to impulsive differential equations.
Juan J. Nieto, Christopher C. Tisdell
doaj   +2 more sources

Satisfiability Modulo ODEs [PDF]

open access: yes, 2013
We study SMT problems over the reals containing ordinary differential equations. They are important for formal verification of realistic hybrid systems and embedded software.
Clarke, Edmund, Gao, Sicun, Kong, Soonho
core   +1 more source

Dynamical behavior analysis and traveling wave solution of stochastic Riemann wave equations

open access: yesAlexandria Engineering Journal
In this paper, our main purpose is to study dynamical behavior analysis and traveling wave solution of stochastic Riemann wave equations in quantum mechanics.
Jie Luo   +4 more
doaj   +1 more source

Phase portraits and optical soliton solutions of coupled nonlinear Maccari systems describing the motion of solitary waves in fluid flow

open access: yesResults in Physics, 2022
The coupled nonlinear Maccari systems are very important equations which have been developed vigorously in the fields of the nonlinear optics, deep water theory, plasma physics, nonlinear optics and so on.
Zhao Li, Xinyu Xie, Changjiang Jin
doaj   +1 more source

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