Results 31 to 40 of about 20,179 (274)

Fractional calculus of variations with a generalized fractional derivative [PDF]

open access: yesFractional Differential Calculus, 2016
Summary: In this paper, we introduce a generalization of the Hilfer-Prabhakar derivative and obtain the Euler-Lagrange equations and Hamiltonian formulation with respect to this fractional derivative in the theory of fractional calculus of variations. Also, we get a sufficient condition for optimality.
Askari, Hassan, Ansari, Alireza
openaire   +2 more sources

Construction and Evaluation of a Control Mechanism for Fuzzy Fractional-Order PID

open access: yesApplied Sciences, 2022
In this research, a control mechanism for fuzzy fractional-order proportional integral derivatives was suggested (FFOPID). The fractional calculus application has been used in different fields of engineering and science and showed to be improved in the ...
Mujahed Al-Dhaifallah
doaj   +1 more source

Dynamical Analysis and Misalignment Projection Synchronization of a Novel RLCM Fractional-Order Memristor Circuit System

open access: yesAxioms, 2023
In this paper, a simple and novel fractional-order memristor circuit is established, which contains only resistance, inductance, capacitance and memristor.
Jindong Liu   +4 more
doaj   +1 more source

Optimality conditions for fractional variational problems with Caputo-Fabrizio fractional derivatives

open access: yesAdvances in Difference Equations, 2017
In this paper, we study the necessary and sufficient optimality conditions for problems of the fractional calculus of variations with a Lagrange function depending on a Caputo-Fabrizio fractional derivative.
Jianke Zhang, Xiaojue Ma, Lifeng Li
doaj   +1 more source

Enhancement of wind energy conversion system performance using adaptive fractional order PI blade angle controller

open access: yesHeliyon, 2021
Wind energy is considered as one of the rapidest rising renewable energy systems. Thus, in this paper the wind energy performance is enhanced through using a new adaptive fractional order PI (AFOPI) blade angle controller.
Ahmed M. Shawqran   +4 more
doaj   +1 more source

Generalized Euler-Lagrange Equations for Fuzzy Fractional Variational Problems under gH-Atangana-Baleanu Differentiability

open access: yesJournal of Function Spaces, 2018
We study in this paper the Atangana-Baleanu fractional derivative of fuzzy functions based on the generalized Hukuhara difference. Under the condition of gH-Atangana-Baleanu fractional differentiability, we prove the generalized necessary and sufficient ...
Jianke Zhang   +3 more
doaj   +1 more source

Relationship Between the Nonlinear Oscillator and the Motor Cortex

open access: yesIEEE Access, 2019
The investigations show that the fractional calculus could be employed for complex biological systems and capture intrinsic phenomena. At the same time, the research results also show that the neural network has the characteristics of fractional calculus
Qiang Lu
doaj   +1 more source

Weighted Generalized Fractional Integration by Parts and the Euler–Lagrange Equation

open access: yesAxioms, 2022
Integration by parts plays a crucial role in mathematical analysis, e.g., during the proof of necessary optimality conditions in the calculus of variations and optimal control.
Houssine Zine   +3 more
doaj   +1 more source

Weighted hypergeometric functions and fractional derivative

open access: yesAdvances in Difference Equations, 2017
We introduce some weighted hypergeometric functions and the suitable generalization of the Caputo fractional derivation. For these hypergeometric functions, some linear and bilinear relations are obtained by means of the mentioned derivation operator ...
JE Restrepo   +3 more
doaj   +1 more source

An Expansion Formula with Higher-Order Derivatives for Fractional Operators of Variable Order

open access: yesThe Scientific World Journal, 2013
We obtain approximation formulas for fractional integrals and derivatives of Riemann-Liouville and Marchaud types with a variable fractional order. The approximations involve integer-order derivatives only. An estimation for the error is given.
Ricardo Almeida, Delfim F. M. Torres
doaj   +1 more source

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