Results 21 to 30 of about 1,279,657 (325)

High order second derivative multistep collocation methods for ordinary differential equations [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization
In this paper, we introduce second derivative multistep collocation meth-ods for the numerical integration of ordinary differential equations (ODEs).
S. Fazeli
doaj   +1 more source

High-order Compact Difference Schemes for the Modified Anomalous Subdiffusion Equation [PDF]

open access: yes, 2015
In this paper, two kinds of high-order compact finite difference schemes for second-order derivative are developed. Then a second-order numerical scheme for Riemann-Liouvile derivative is established based on fractional center difference operator.
Ding, Hengfei, Li, Changpin
core   +1 more source

Family of One-Step A-Stable Optimized Third Derivative Hybrid Block Methods for Solving General Second-Order IVPs [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2023
This paper introduces three members of a one-step optimized third derivative hybrid block method family for solving general second-order initial value problems.
Saidu Yakubu
doaj   +1 more source

Wavelets operational methods for fractional differential equations and systems of fractional differential equations [PDF]

open access: yes, 2017
In this thesis, new and effective operational methods based on polynomials and wavelets for the solutions of FDEs and systems of FDEs are developed.
A. H. Al-Bagawi, A. H. Al-Bagawi   +8 more
core   +2 more sources

Fuzzy picard’s method for derivatives of second order [PDF]

open access: diamondJournal of Physics: Conference Series, 2018
Sapna Devi, K. Ganesan
openalex   +2 more sources

Near conserving energy numerical schemes for two-dimensional coupled seismic wave equations [PDF]

open access: yes, 2018
Two-dimensional coupled seismic waves, satisfying the equations of linear isotropic elasticity, on a rectangular domain with initial conditions and periodic boundary conditions, are considered.
Portillo de la Fuente, Ana María
core   +1 more source

On Derivative Free Multiple-Root Finders with Optimal Fourth Order Convergence

open access: yesMathematics, 2020
A number of optimal order multiple root techniques that require derivative evaluations in the formulas have been proposed in literature. However, derivative-free optimal techniques for multiple roots are seldom obtained.
Janak Raj Sharma   +2 more
doaj   +1 more source

The Determination of Dendrite Coherency Point Characteristics Using Three New Methods for Aluminum Alloys [PDF]

open access: yes, 2018
The aim of this work is to give an overview of existing methods and to introduce three new methods for the determination of the Dendrite Coherency Point (DCP) for AlSi10Mg alloys, as well as to compare the acquired values of DCP based on a thermal ...
Djurdjevic, Mile   +4 more
core   +2 more sources

P-Stable Higher Derivative Methods with Minimal Phase-Lag for Solving Second Order Differential Equations

open access: yesJournal of Applied Mathematics, 2011
Some new higher algebraic order symmetric various-step methods are introduced. For these methods a direct formula for the computation of the phase-lag is given. Basing on this formula, calculation of free parameters is performed to minimize the phase-lag.
Fatheah A. Hendi
doaj   +1 more source

Two different spectrophotometric methods for simultaneous determination of binary mixture of atenolol and amlodipine in commercial formulation

open access: yesZanco Journal of Pure and Applied Sciences, 2022
For the simultaneous determination of a binary mixture of amlodipine (AM) and atenolol (AT) in tablets, two approaches were accessible. The first method is the second derivative of the ratio spectra (2DD) that obtained via dividing the absorption ...
Shilan A. Omer   +2 more
doaj   +1 more source

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