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Why Do Big Data and Machine Learning Entail the Fractional Dynamics? [PDF]

open access: yesEntropy, 2021
Fractional-order calculus is about the differentiation and integration of non-integer orders. Fractional calculus (FC) is based on fractional-order thinking (FOT) and has been shown to help us to understand complex systems better, improve the processing ...
Haoyu Niu, YangQuan Chen, Bruce J. West
doaj   +4 more sources

Fractional Dynamics of HIV with Source Term for the Supply of New CD4+ T-Cells Depending on the Viral Load via Caputo–Fabrizio Derivative [PDF]

open access: yesMolecules, 2021
Human immunodeficiency virus (HIV) is a life life-threatening and serious infection caused by a virus that attacks CD4+ T-cells, which fight against infections and make a person susceptible to other diseases.
Zahir Shah   +4 more
doaj   +2 more sources

General Fractional Dynamics

open access: yesMathematics, 2021
General fractional dynamics (GFDynamics) can be viewed as an interdisciplinary science, in which the nonlocal properties of linear and nonlinear dynamical systems are studied by using general fractional calculus, equations with general fractional ...
Vasily E. Tarasov
doaj   +3 more sources

General Non-Markovian Quantum Dynamics

open access: yesEntropy, 2021
A general approach to the construction of non-Markovian quantum theory is proposed. Non-Markovian equations for quantum observables and states are suggested by using general fractional calculus.
Vasily E. Tarasov
doaj   +1 more source

A Generalized Diffusion Equation: Solutions and Anomalous Diffusion

open access: yesFluids, 2023
We investigate the solutions of a generalized diffusion-like equation by considering a spatial and time fractional derivative and the presence of non-local terms, which can be related to reaction or adsorption–desorption processes.
Ervin K. Lenzi   +4 more
doaj   +1 more source

Anomalous Relaxation and Three-Level System: A Fractional Schrödinger Equation Approach

open access: yesQuantum Reports, 2023
We investigate a three-level system in the context of the fractional Schrödinger equation by considering fractional differential operators in time and space, which promote anomalous relaxations and spreading of the wave packet.
Ervin K. Lenzi   +5 more
doaj   +1 more source

Schrödinger Equation with Geometric Constraints and Position-Dependent Mass: Linked Fractional Calculus Models

open access: yesQuantum Reports, 2022
We investigate the solutions of a two-dimensional Schrödinger equation in the presence of geometric constraints, represented by a backbone structure with branches, by taking a position-dependent effective mass for each direction into account.
Ervin K. Lenzi   +3 more
doaj   +1 more source

Quantum Maps with Memory from Generalized Lindblad Equation

open access: yesEntropy, 2021
In this paper, we proposed the exactly solvable model of non-Markovian dynamics of open quantum systems. This model describes open quantum systems with memory and periodic sequence of kicks by environment. To describe these systems, the Lindblad equation
Vasily E. Tarasov
doaj   +1 more source

Aspects of Quantum Statistical Mechanics: Fractional and Tsallis Approaches

open access: yesMathematics, 2023
We investigated two different approaches, which can be used to extend the standard quantum statistical mechanics. One is based on fractional calculus, and the other considers the extension of the concept of entropy, i.e., the Tsallis statistics.
Ervin Kaminski Lenzi   +2 more
doaj   +1 more source

Qualitative and Quantitative Analysis of Fractional Dynamics of Infectious Diseases with Control Measures

open access: yesFractal and Fractional, 2023
Infectious diseases can have a significant economic impact, both in terms of healthcare costs and lost productivity. This can be particularly significant in developing countries, where infectious diseases are more prevalent, and healthcare systems may be
Sultan Alyobi, Rashid Jan
doaj   +1 more source

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