Results 11 to 20 of about 734,652 (287)

WASPAS method and Aczel-Alsina aggregation operators for managing complex interval-valued intuitionistic fuzzy information and their applications in decision-making [PDF]

open access: yesPeerJ Computer Science, 2023
Aczel-Alsina t-norm and t-conorm are a valuable and feasible technique to manage ambiguous and inconsistent information because of their dominant characteristics of broad parameter values.
Haojun Fang   +4 more
doaj   +2 more sources

On the Zero-Hopf Bifurcation of the Lotka–Volterra Systems in R 3

open access: yesMathematics, 2020
Here we study 3-dimensional Lotka–Volterra systems. It is known that some of these differential systems can have at least four periodic orbits bifurcating from one of their equilibrium points.
Maoan Han, Jaume Llibre, Yun Tian
doaj   +1 more source

On the birth of limit cycles for non-smooth dynamical systems [PDF]

open access: yes, 2014
The main objective of this work is to develop, via Brower degree theory and regularization theory, a variation of the classical averaging method for detecting limit cycles of certain piecewise continuous dynamical systems.
Andronov   +31 more
core   +3 more sources

On the Existence and Uniqueness of the ODE Solution and Its Approximation Using the Means Averaging Approach for the Class of Power Electronic Converters

open access: yesMathematics, 2021
Power electronic converters are mathematically represented by a system of ordinary differential equations discontinuous right-hand side that does not verify the conditions of the Cauchy-Lipschitz Theorem.
Santolo Meo, Luisa Toscano
doaj   +1 more source

Scale Invariance and Self-averaging in disordered systems [PDF]

open access: yes, 2003
In a previous paper we found that in the random field Ising model at zero temperature in three dimensions the correlation length is not self-averaging near the critical point and that the violation of self-averaging is maximal.
Dotsenko Vik.   +6 more
core   +6 more sources

Adaptive tracking control of flapping wing micro-air vehicles with averaging theory

open access: yesCAAI Transactions on Intelligence Technology, 2018
An input constrained adaptive tracking controller is designed for flapping micro aerial vehicles, wherein the moving averaging filter is adopted to estimate the averaged states of the system.
Chen Qian, Yongchun Fang
doaj   +1 more source

Limit cycles of Liénard polynomial systems type by averaging method

open access: yesMoroccan Journal of Pure and Applied Analysis, 2020
We apply the averaging theory of first and second order for studying the limit cycles of generalized polynomial Linard systems of the ...
Boulfoul Amel, Mellahi Nawal
doaj   +1 more source

On the limit cycles for a class of eighth-order differential equations

open access: yesMoroccan Journal of Pure and Applied Analysis, 2020
In this article, we provide sufficient conditions for the existence of periodic solutions of the eighth-order differential equation x(8)-(1+p2+λ2+μ2)x(6)+Ax⃜+Bx¨+p2λ2μ2x=ɛF(t,x,x˙,x¨,x⃛,x⃜,x(5),x(6)x(7)),{x^{\left( 8 \right)}} - \left( {1 + {p^2 ...
Berrehail Chems Eddine   +2 more
doaj   +1 more source

Mean Flow from Phase Averages in the 2D Boussinesq Equations

open access: yesAtmosphere, 2023
The atmosphere and ocean are described by highly oscillatory PDEs that challenge both our understanding of their dynamics and their numerical approximation.
Beth A. Wingate   +2 more
doaj   +1 more source

Ensemble average theory of gravity [PDF]

open access: yesPhysical Review D, 2016
6 pages, typos corrected, comments are welcome, replaced with published ...
openaire   +2 more sources

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