Results 31 to 40 of about 27,190 (260)

Measurement instrumentation and selected signal processing techniques for anomalous diffusion analysis

open access: yesMeasurement: Sensors, 2020
Anomalous diffusion phenomena are ubiquitous in many areas, including physics, biology, medicine, climate and also financial markets. The description and analysis of this phenomena are challenging tasks.
Katarzyna Maraj   +5 more
doaj   +1 more source

Analysis of PFG Anomalous Diffusion via Real-Space and Phase-Space Approaches

open access: yesMathematics, 2018
Pulsed-field gradient (PFG) diffusion experiments can be used to measure anomalous diffusion in many polymer or biological systems. However, it is still complicated to analyze PFG anomalous diffusion, particularly the finite gradient pulse width (FGPW ...
Guoxing Lin
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

Fundamental solution of the model equation of anomalous diffusion of fractional order

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2015
Fundamental solution of the model equation of anomalous diffusion with Riemann-Liouville operator is constructed. Using the properties of the integral transformation with Wright function in kernel, we give estimates for the fundamental solution. When the
Fatima G Khushtova
doaj   +1 more source

Superdiffusion revisited in view of collisionless reconnection [PDF]

open access: yesAnnales Geophysicae, 2014
The concept of diffusion in collisionless space plasmas like those near the magnetopause and in the geomagnetic tail during reconnection is reexamined making use of the division of particle orbits into waiting orbits and break-outs into ballistic ...
R. A. Treumann   +3 more
doaj   +1 more source

Anomalous diffusion on a fractal mesh [PDF]

open access: yesPhysical Review E, 2017
An exact analytical analysis of anomalous diffusion on a fractal mesh is presented. The fractal mesh structure is a direct product of two fractal sets which belong to a main branch of backbones and side branch of fingers. The fractal sets of both backbones and fingers are constructed on the entire (infinite) $y$ and $x$ axises. To this end we suggested
Sandev, T., Iomin, A., Kantz, H.
openaire   +4 more sources

A Markov-Chain-Based Method to Characterize Anomalous Diffusion Phenomenon in Unconventional Reservoir

open access: yesImproved Oil and Gas Recovery, 2018
The recent success in developing unconventional reservoirs has aroused many new challenges to the theory of reservoir engineering. In this paper, we try to investigate the anomalous diffusion phenomenon caused by the heterogeneity due to the fracture ...
ShuaiLiu, HanLi, Peter P.Valkó
doaj   +1 more source

Caputo Fractional Derivative and Quantum-Like Coherence

open access: yesEntropy, 2021
We study two forms of anomalous diffusion, one equivalent to replacing the ordinary time derivative of the standard diffusion equation with the Caputo fractional derivative, and the other equivalent to replacing the time independent diffusion coefficient
Garland Culbreth   +3 more
doaj   +1 more source

An Analytical Flow Model for Heterogeneous Multi-Fractured Systems in Shale Gas Reservoirs

open access: yesEnergies, 2018
The use of multiple hydraulically fractured horizontal wells has been proven to be an efficient and effective way to enable shale gas production. Meanwhile, analytical models represent a rapid evaluation method that has been developed to investigate the ...
Honghua Tao   +5 more
doaj   +1 more source

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