Results 71 to 80 of about 80,976 (233)

Solution to the Modified Helmholtz Equation for Arbitrary Periodic Charge Densities

open access: yesFrontiers in Physics, 2021
We present a general method for solving the modified Helmholtz equation without shape approximation for an arbitrary periodic charge distribution, whose solution is known as the Yukawa potential or the screened Coulomb potential.
Miriam Winkelmann   +13 more
doaj   +1 more source

A note on the asymptotics of the modified Bessel functions on the Stokes lines [PDF]

open access: yes, 2017
We employ the exponentially improved asymptotic expansions of the confluent hypergeometric functions on the Stokes lines discussed by the author [Appl. Math. Sci. 7 (2013) 6601–6609] to give the analogous expansions of the modified Bessel functions Iν(z)
Paris, R. B.
core  

Discrete index transforms with Bessel and modified Bessel functions

open access: yesAnalysis, 2022
Abstract Discrete analogues of the index transforms, involving Bessel and the modified Bessel functions, are introduced and investigated. The corresponding inversion theorems for suitable classes of functions and sequences are established.
openaire   +2 more sources

A partial envelope approach for modelling multivariate spatial‐temporal data

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract In the new era of big data, modelling multivariate spatial‐temporal data is a challenging task due to both the high dimensionality of the features and complex associations among the responses across different locations and time points.
Reisa Widjaja   +3 more
wiley   +1 more source

Linear Analytical Solutions of Mechanical Sensitivity in Large Deflection of Unsymmetrically Layered Piezoelectric Plate under Pretension

open access: yesAdvances in Mechanical Engineering, 2014
Linear analytical study on the mechanical sensitivity in large deflection of unsymmetrically layered and laterally loaded piezoelectric plate under pretension is conducted. von Karman plate theory for large deflection is utilized but extended to the case
Chun-Fu Chen, I-Wei Li
doaj   +1 more source

Viscoelastic fluid flow through an annulus with relaxation, retardation effects and external heat source/sink

open access: yesAlexandria Engineering Journal, 2018
Analysis of unsteady hydro-magnetic viscoelastic fluid flow through an annulus (bounded by two infinite co-axial circular cylinders) has been made in presence of radiation, periodic pressure gradient and external heat source/sink.
Debasish Dey
doaj   +1 more source

Application of Bessel functions [PDF]

open access: yes, 2016
Cílem této práce je seznámení s Besselovými funkcemi a jejich vlastnostmi a nastínění jejich využití v praxi při zkoumání úlohy matematického modelu kmitání tenké kruhové desky.
Lorenczyk, Jiří
core  

Plasmakristall‐4 Experiment: 10 Years of Operation in Orbit

open access: yesContributions to Plasma Physics, EarlyView.
ABSTRACT Plasmakristall‐4 (PK‐4) is a microgravity complex plasma laboratory operated for 10 years on board the International Space Station. Its main purpose is the particle‐resolved investigation of generic condensed matter phenomena using strongly coupled suspensions of microparticles immersed in low‐pressure gas‐discharge plasmas.
M. Pustylnik   +3 more
wiley   +1 more source

Transient free convection flow past vertical cylinder with constant heat flux and mass transfer

open access: yesAin Shams Engineering Journal, 2017
This paper describes a one dimensional unsteady natural convection flow past an infinite vertical cylinder with heat and mass transfer under the effect of constant heat flux at the surface of the cylinder.
Rudra Kanta Deka   +2 more
doaj   +1 more source

Special Functions of Mathematical Physics: A Unified Lagrangian Formalism

open access: yesMathematics, 2020
Lagrangian formalism is established for differential equations with special functions of mathematical physics as solutions. Formalism is based on either standard or non-standard Lagrangians.
Zdzislaw E. Musielak   +2 more
doaj   +1 more source

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