Results 21 to 30 of about 2,408,659 (235)

Fractional calculus of periodic distributions [PDF]

, 2011
Two approaches for defining fractional derivatives of periodic distributions are presented. The first is a distributional version of the Weyl fractional derivative in which a derivative of arbitrary order of a periodic distribution is defined via Fourier
Lamb, Wilson, Khan, Khaula Naeem, Mcbride, Adam   +2 more
core   +4 more sources

New fractional model to analyze impacts of Newtonian heating, shape factor and ramped flow function on MgO–SiO2–Kerosene oil hybrid nanofluid

Case Studies in Thermal Engineering, 2022
In modern times, diathermal oils have piqued the attraction of various researchers due to their multiple significant industrial applications. The present work aims to investigate the heat transfer performance of a specific diathermal oil called kerosene ...
Asifa, Talha Anwar, Poom Kumam, Shah Muhammad   +3 more
doaj   +1 more source

Uncertainty principles for coupled fractional Wigner-Ville distribution. [PDF]

R Soc Open Sci
The coupled fractional Wigner–Ville distribution is a more general version of the fractional Wigner–Ville distribution. Main properties including boundedness, Moyal’s formula and inversion formula are studied in detail for the transformation ...
Nur ATA, Bahri M, Bachtiar N, Rahim A.
europepmc   +2 more sources

Eco-Friendly Adsorbent from Waste of Mint: Application for the Removal of Hexavalent Chromium

Journal of Chemistry, 2021
A serious environmental disaster is looming on the horizon due to the indiscriminate release of heavy metals into the soil and wastewater from human industrial practices.
Fatima Khammour, Fatouma Mohamed Abdoul-Latif, Ayoub Ainane, Jalludin Mohamed, Tarik Ainane   +4 more
doaj   +1 more source

Random fractional Fourier transform : stochastic perturbations along the axis of propagation [PDF]

, 1999
The fractional Fourier transform (FRT) is known to be optically implementable with use of a medium with a perfect radial quadratic-index profile. Using the quantum-mechanical operator formalism, we examine the effects on the FRT action of such a medium
Abe, Sumiyoshi, Sheridan, John T.
core   +1 more source

Hydromagnetic free convection flow of viscous fluid between vertical parallel plates with damped thermal and mass fluxes

Alexandria Engineering Journal, 2019
In this article, hydromagnetic free convection flow of viscous fluid between two vertical plates is considered. The Caputo time-fractional derivative is used and the governing equations are fractionalized by means of generalized Fourier’s and Fick’s laws.
Zehui Shao, Nehad Ali Shah, Iskander Tlili, Usman Afzal, M. Saqib Khan   +4 more
doaj   +1 more source

Development of dispersive solid-phase microextraction coupled with high-pressure liquid chromatography for the preconcentration and determination of the selected neonicotinoid insecticides

Journal of Analytical Science and Technology, 2022
Neonicotinoid insecticides have raised a lot of societal concerns due to their environmental ubiquity and unique mode of action. Therefore, it is of great research interest to monitor their occurrence in the environmental waters. However, these compounds
Ngwako Joseas Waleng, Shirley Kholofelo Selahle, Anele Mpupa, Philiswa Nosizo Nomngongo   +3 more
doaj   +1 more source

Enhanced monopulse radar tracking using fractional Fourier filtering in the presence of interference [PDF]

, 2010
Monopulse radars are used to track a target that appears in the look direction beam width. Significant distortion is produced when manmade high power interference (jamming) is introduced to the radar processor through the radar antenna main lobe (main ...
Elgamel, Sherif A.E.H., Soraghan, J.J.
core   +3 more sources

Using EMD-FrFT filtering to mitigate high power interference in chirp tracking radars [PDF]

, 2011
This letter presents a new signal processing subsystem for conventional monopulse tracking radars that offers an improved solution to the problem of dealing with manmade high power interference (jamming).
Soraghan, John, Elgamel, Sherif
core   +4 more sources

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

Frontiers in Chemistry, 2020
In this study, a magnetic porphyrin-based porous organic polymer (MP-POP) nanocomposite was successfully synthesized according previous studies and applied as an adsorbent for simultaneous extraction and preconcentration of four neonicotinoid ...
Shirley K. Selahle, Shirley K. Selahle, Ngwako J. Waleng, Ngwako J. Waleng, Anele Mpupa, Anele Mpupa, Philiswa N. Nomngongo, Philiswa N. Nomngongo, Philiswa N. Nomngongo   +8 more
doaj   +1 more source