Results 11 to 20 of about 120,593 (286)

Applications of Fractional Differentiation Matrices in Solving Caputo Fractional Differential Equations

open access: yesFractal and Fractional, 2023
This paper pursues obtaining Jacobi spectral collocation methods to solve Caputo fractional differential equations numerically. We used the shifted Jacobi–Gauss–Lobatto or Jacobi–Gauss–Radau quadrature nodes as the collocation points and derived the ...
Zhongshu Wu   +3 more
doaj   +3 more sources

Application of Fractional Differential Model in Image Enhancement of Strong Reflection Surface

open access: yesMathematics, 2023
Combined with advanced fractional differential mask operation, this paper used a fractional differential to normalize the 5 × 5 mask and conducted experiments to select fractional v = 0.7 to determine the equation. The position of the center of the light
Tang Ruiyin, Liu Bo
doaj   +1 more source

Using Field Spectroradiometer to Estimate the Leaf N/P Ratio of Mixed Forest in a Karst Area of Southern China: A Combined Model to Overcome Overfitting

open access: yesRemote Sensing, 2021
The ratio between nitrogen and phosphorus (N/P) in plant leaves has been widely used to assess the availability of nutrients. However, it is challenging to rapidly and accurately estimate the leaf N/P ratio, especially for mixed forest. In this study, we
Wen He   +6 more
doaj   +1 more source

TO THE THEORY OF THERMAL CONDUCTION AND CONDUCTIVITY OF METAL FRACTALS [PDF]

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2019
In the paper, it is suggsted an analytical approach of the physical description of fractal metal structures. The calculatuions are based on using quasiclassical Boltzmann kinetic equation and formally introduced operations of fractional differentiation ...
S. O. Gladkov, S. B. Bogdanova
doaj   +1 more source

Modeling of Strength Characteristics of Polymer Concrete Via the Wave Equation with a Fractional Derivative

open access: yesMathematics, 2020
The article presents a solution to a boundary value problem for a wave equation containing a fractional derivative with respect to a spatial variable. This model is used to describe oscillation processes in a viscoelastic medium, in particular changes in
Ludmila Kirianova
doaj   +1 more source

Some Alternative Solutions to Fractional Models for Modelling Power Law Type Long Memory Behaviours

open access: yesMathematics, 2020
The paper first describes a process that exhibits a power law-type long memory behaviour: the dynamical behaviour of the heap top of falling granular matter such as sand.
Jocelyn Sabatier   +2 more
doaj   +1 more source

Fuzzy Conformable Fractional Differential Equations [PDF]

open access: yesInternational Journal of Differential Equations, 2021
In this study, fuzzy conformable fractional differential equations are investigated. We study conformable fractional differentiability, and we define fractional integrability properties of such functions and give an existence and uniqueness theorem for a solution to a fuzzy fractional differential equation by using the concept of conformable ...
Atimad Harir   +2 more
openaire   +3 more sources

Review of Some Promising Fractional Physical Models [PDF]

open access: yes, 2015
Fractional dynamics is a field of study in physics and mechanics investigating the behavior of objects and systems that are characterized by power-law non-locality, power-law long-term memory or fractal properties by using integrations and ...
Tarasov, Vasily E.
core   +1 more source

ON FRACTIONAL DIFFERENTIATION

open access: yesVestnik of Samara University. Natural Science Series, 2018
Due to the operation of fractional differentiation introduced with the help of Fourier integral, the results of calculating fractional derivatives for certain types of functions are given. Using the numerical method of integration, the values of fractional derivatives for arbitrary dimensionality , (where is any number greater than zero) are calculated.
Gladkov, S. O., Bogdanova, S. B.
openaire   +3 more sources

Dualities and Asymptotic Mixtures Using Functional-Order Differentiation

open access: yesAppliedMath, 2022
New definitions for fractional integro-differential operators are presented and referred to as delayed fractional operators. It is shown that delayed fractional derivatives give rise to the notion of functional order differentiation.
Aris Alexopoulos
doaj   +1 more source

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