Results 21 to 30 of about 2,133 (160)

New Refinements and Improvements of Some Trigonometric Inequalities Based on Padé Approximant

open access: yesJournal of Mathematics, 2020
A multiple-point Padé approximant method is presented for approximating and bounding some trigonometric functions in this paper. We give new refinements and improvements of some trigonometric inequalities including Jordan’s inequality, Kober’s inequality,
Lina Zhang, Xuesi Ma
doaj   +1 more source

One-log call iterative solution of the Colebrook equation for flow friction based on Pade polynomials [PDF]

open access: yes, 2018
The 80 year-old empirical Colebrook function zeta, widely used as an informal standard for hydraulic resistance, relates implicitly the unknown flow friction factor lambda, with the known Reynolds number Re and the known relative roughness of a pipe ...
Brkić, Dejan, Praks, Pavel
core   +5 more sources

Electromagnetic scattering beyond the weak regime: Solving the problem of divergent Born perturbation series by Padé approximants [PDF]

open access: yesEPJ Web of Conferences, 2020
Electromagnetic scattering is the main phenomenon behind all optical measurement methods where one aims to retrieve the shape or physical properties of an unknown object by measuring how it scatters an incident optical field.
van der Sijs Thomas   +2 more
doaj   +1 more source

Numerical Investigation on MHD Flow and Heat Transfer over an Exponentially Stretching Sheet with Viscous Dissipation and Radiation Effects

open access: yesITM Web of Conferences, 2017
This study is to examine the steady two dimensional laminar flow of a viscous incompressible electrically conducting fluid over a continuous surface. In this study DTM-Padé method is used to solve which is a combination of differential transform method ...
Çilingir Süngü İnci
doaj   +1 more source

Free Convection Flow and Heat Transfer of Nanofluids of Different Shapes of Nano-Sized Particles over a Vertical Plate at Low and High Prandtl Numbers [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2019
In this paper, free convection flow and heat transfer of nanofluids of differently-shaped nano-sized particles over a vertical plate at very low and high Prandtl numbers are analyzed.
Gbeminiyi Sobamowo
doaj   +1 more source

Multistep High-Order Methods for Nonlinear Equations Using Padé-Like Approximants

open access: yesDiscrete Dynamics in Nature and Society, 2017
We present new high-order optimal iterative methods for solving a nonlinear equation, f(x)=0, by using Padé-like approximants. We compose optimal methods of order 4 with Newton’s step and substitute the derivative by using an appropriate rational ...
Alicia Cordero   +3 more
doaj   +1 more source

One step multiderivative methods for first order ordinary differential equations [PDF]

open access: yes, 1981
A family of one-step multiderivative methods based on Padé approximants to the exponential function is developed. The methods are extrapolated and analysed for use in PECE mode.
A. Q. M. Khaliq   +10 more
core   +1 more source

Approximation of the Integrals of the Gaussian Distribution of Asperity Heights in the Greenwood-Tripp Contact Model of Two Rough Surfaces Revisited

open access: yesJournal of Applied Mathematics, 2013
Some examples of application of Padé approximant techniques to approximate the integrals in question and comparison with previous results, essentially the recent Panayi-Schock and Green-wood results, show the efficiency of this simple natural ...
Radosław Jedynak, Jacek Gilewicz
doaj   +1 more source

Padé approximant related to remarkable inequalities involving trigonometric functions

open access: yesJournal of Inequalities and Applications, 2016
In this paper we, respectively, give simple proofs of some remarkable trigonometric inequalities, based on the Padé approximation method. We also obtain rational refinements of these inequalities.
Gabriel Bercu
doaj   +1 more source

On the Study of Oscillating Viscous Flows by Using the Adomian-Padé Approximation

open access: yesJournal of Applied Mathematics, 2015
The Adomian-Padé technique is applied to examine two oscillating viscous flows, the Stokes’ second problem and the pressure-driven pulsating flow. Main purposes for studying oscillating flows are not only to verify the accuracy of the approximation ...
Chi-Min Liu
doaj   +1 more source

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