Results 21 to 30 of about 231 (111)

Monitoring the Diameter Changes of Flax Fibre Elements during Twin Screw Extrusion Using X-Ray Computed Micro-Tomography

open access: yesJournal of Natural Fibers, 2020
Fiber size aspect ratio is known to impact the mechanical and reinforcement properties of natural fiber-based composites. However, the representation of fiber diameter change occurring during the extrusion process is controversial compared to the length.
Seif Eddine Hamdi   +4 more
doaj   +1 more source

Thermal Convective Instabilities and Chaos in a Rotating Hybrid Nanofluid Layer with Cattaneo–Christov Heat Flux Model

open access: yesComplexity, Volume 2022, Issue 1, 2022., 2022
The linear and nonlinear dynamics of thermal convection of a rotating hybrid nanofluid layer heated from below with the Cattaneo–Christov heat flux model are studied in this paper. Starting from the flow equations of a hybrid nanofluid and exploiting the free boundary conditions, the analytical expressions of the stationary and oscillatory Rayleigh ...
Sèmako Justin Dèdèwanou   +6 more
wiley   +1 more source

Multiscale modeling and numerical analyses of the electric conductivity of CNT/polymer nanocomposites taking into account the tunneling effect

open access: yesInternational Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 34, Issue 6, November/December 2021., 2021
Abstract Tunneling effect plays a significant part in the extremely low electric percolation threshold and large conductivity of carbon nanotube (CNT)/polymer nanocomposites, which allows electric conduction between two CNTs separated at nanometric distances. In this work, a numerical model taking into account the nonlinear tunneling effect is proposed
Xiaoxin Lu, Lionel Pichon, Jinbo Bai
wiley   +1 more source

Numerical study of the effect of concrete cover and the friction of steel concrete interface [PDF]

open access: yesMATEC Web of Conferences, 2019
The work presented in this paper resume a numerical analysis of the concrete cover effect, on the resistance of the steel-concrete interface. The effect of friction on the interface behavior is also included.
Zenasni Z.   +7 more
doaj   +1 more source

Chaos in a Financial System with Fractional Order and Its Control via Sliding Mode

open access: yesComplexity, Volume 2021, Issue 1, 2021., 2021
In this paper, the dynamical behaviors and chaos control of a fractional‐order financial system are discussed. The lowest fractional order found from which the system generates chaos is 2.49 for the commensurate order case and 2.13 for the incommensurate order case. Also, period‐doubling route to chaos was found in this system.
Paul Yaovi Dousseh   +5 more
wiley   +1 more source

Analytical solution of a non-homogeneous boundary-value problem for the transport equation in an earth to air energy exchanger by initial base analysis method

open access: yesMethodsX, 2022
In this paper, a one-dimensional time-dependent transport equation with inhomogeneous Dirichlet boundary conditions, often encountered in the study of an Earth to Air Energy Exchanger, is solved by a practical analytical method.
Landry Jean Pierre Gomat   +1 more
doaj   +1 more source

Adaptive Control of a New Chaotic Financial System with Integer Order and Fractional Order and Its Identical Adaptive Synchronization

open access: yesMathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021
In this paper, adaptive control and adaptive synchronization of an integer and fractional order new financial system with unknown constant parameters are studied. Based on Lyapunov’s stability theory, an adaptive control law is designed to asymptotically stabilize the state variables of the system to the origin in integer and fractional order cases. By
Paul Yaovi Dousseh   +5 more
wiley   +1 more source

Analysis of Magnetic Field Measurements for Indoor Positioning

open access: yesSensors, 2022
Infrastructure-free magnetic fields are ubiquitous and have attracted tremendous interest in magnetic field-based indoor positioning. However, magnetic field-based indoor positioning applications face challenges such as low discernibility, heterogeneous ...
Guanglie Ouyang, Karim Abed-Meraim
doaj   +1 more source

Efficacy of Whole‐Body Vibration Training on Brain‐Derived Neurotrophic Factor, Clinical and Functional Outcomes, and Quality of Life in Women with Fibromyalgia Syndrome: A Randomized Controlled Trial

open access: yesJournal of Healthcare Engineering, Volume 2021, Issue 1, 2021., 2021
This study aimed to investigate the efficacy of whole‐body vibration training (WBVT) on blood brain‐derived neurotrophic factor (BDNF) levels and determine the clinical and functional outcomes in patients with fibromyalgia syndrome (FMS). Thirty‐two women with FMS were randomized into an intervention group (IG), receiving 6 weeks of WBVT, or a control ...
Vanessa G. C. Ribeiro   +24 more
wiley   +1 more source

Corrigendum to “Chaos in a Financial System with Fractional Order and Its Control via Sliding Mode”

open access: yesComplexity, Volume 2021, Issue 1, 2021., 2021
In this paper, the dynamical behaviors and chaos control of a fractional‐order financial system are discussed. The lowest fractional order found from which the system generates chaos is 2.49 for the commensurate order case and 2.57 for the incommensurate order case. Also, the period‐doubling route to chaos was found in this system.
Paul Yaovi Dousseh   +4 more
wiley   +1 more source

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