Results 21 to 30 of about 4,310,333 (249)

Existence of (N, λ)-periodic solutions for sbstract fractional difference equations

open access: yes, 2022
We establish sufficient conditions for the existence and uniqueness of (N,λ)-periodic solutions for the following abstract model: Δαu(n) = Au(n + 1) + f(n, u(n)), n ∈ Z, where 0 < α ≤ 1, A is a closed linear operator defined in a Banach space X, Δα ...
Dıaz, Stiven   +5 more
core   +1 more source

Extra Wide Band MIMO Antenna with High Isolation and Low Correlation at 38 GHz mm-Wave Frequency Band for 5G Applications [PDF]

open access: yesE3S Web of Conferences, 2022
A compact wide-band Multiple Input Multiple Output (MIMO) antenna having highest isolation and least correlation for millimeter-wave 5G communications is proposed in this paper. Firstly, a single antenna was designed and simulated to be working at 38 GHz,
El Hadri Doae   +2 more
doaj   +1 more source

Approximation of space-time fractional equations [PDF]

open access: yes, 2021
The aim of this paper is to provide approximation results for space-time non-local equations with general non-local (and fractional) operators in space and time.
D'ovidio M., Capitanelli R.
core   +1 more source

Riesz potential on the Heisenberg group and modified Morrey spaces

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012
In this paper we study the fractional maximal operator Mα, 0 ≤ α < Q and the Riesz potential operator ℑα, 0 < α < Q on the Heisenberg group in the modified Morrey spaces L͂p,λ(ℍn), where Q = 2n + 2 is the homogeneous dimension on ℍn.
Guliyev Vagif S., Mammadov Yagub Y.
doaj   +1 more source

Abstract Univariate Neural Network Approximation Using a q-Deformed and λ-Parametrized Hyperbolic Tangent Activation Function

open access: yesFractal and Fractional, 2023
In this work, we perform univariate approximation with rates, basic and fractional, of continuous functions that take values into an arbitrary Banach space with domain on a closed interval or all reals, by quasi-interpolation neural network operators ...
George A. Anastassiou
doaj   +1 more source

Vortex counting and the quantum Hall effect

open access: yesJournal of High Energy Physics, 2022
We provide evidence for conjectural dualities between nonrelativistic Chern-Simons-matter theories and theories of (fractional, nonAbelian) quantum Hall fluids in 2 + 1 dimensions.
Edward Walton
doaj   +1 more source

Fractional-Order PIλDμ Controller Using Adaptive Neural Fuzzy Model for Course Control of Underactuated Ships

open access: yesApplied Sciences, 2022
For the uncertainty caused by the time-varying modeling parameters with the sailing speed in the course control of underactuated ships, a novel identification method based on an adaptive neural fuzzy model (ANFM) is proposed to approximate the inverse ...
Guangyu Li   +3 more
doaj   +1 more source

Fractional Derivatives and Projectile Motion

open access: yes, 2021
Projectile motion is studied using fractional calculus. Specifically, a newly defined fractional derivative (the Leibniz L-derivative) and its successor (Λ-fractional derivative) are used to describe the motion of the projectile.
Dimitrios Karaoulanis   +1 more
core   +1 more source

Diurnal microstructural variations in healthy adult brain revealed by diffusion tensor imaging. [PDF]

open access: yesPLoS ONE, 2014
Biorhythm is a fundamental property of human physiology. Changes in the extracellular space induced by cell swelling in response to the neural activity enable the in vivo characterization of cerebral microstructure by measuring the water diffusivity ...
Chunxiang Jiang   +7 more
doaj   +1 more source

Front Propagation of Exponentially Truncated Fractional-Order Epidemics

open access: yesFractal and Fractional, 2022
The existence of landscape constraints in the home range of living organisms that adopt Lévy-flight movement patterns, prevents them from making arbitrarily large displacements.
Afshin Farhadi, Emmanuel Hanert
doaj   +1 more source

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