Results 1 to 10 of about 242 (53)

Cubic spline solutions of the ninth order linear and non-linear boundary value problems

open access: yesAlexandria Engineering Journal, 2022
A lot of numerical formulations of physical phenomena contain 9th-order BVPs. The presented probe intends to consider the spline solutions of the 9th-order boundary value problems using Cubic B Spline(CBS).
Xiao-Zhong Zhang   +5 more
doaj   +1 more source

Parameter estimation for a SEIRS model with COVID-19 data of Türkiye

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2023
In this paper, the unknown parameters of a SEIRS mathematical model for the dynamics of COVID-19 are estimated by the least squares approach using data of Trkiye.
Unal Arzu, Demirci Elif
doaj   +1 more source

Solutions of BVPs arising in hydrodynamic and magnetohydro-dynamic stability theory using polynomial and non-polynomial splines

open access: yesAlexandria Engineering Journal, 2021
This paper describes the exceptionally precise results of 6th-order and 8th-order nonlinear boundary-value problems(BVPs). Cubic-Nonpolynomial spline(CNPS) and Cubic-polynomial spline(CNPS) are utilized to solve such types of BVPs.
Aasma Khalid   +4 more
doaj   +1 more source

Enhancing parental reflective functioning through early dyadic interventions: A systematic review and meta‐analysis

open access: yesInfant Mental Health Journal: Infancy and Early Childhood, Volume 42, Issue 1, Page 21-34, January/February 2021., 2021
ABSTRACT Parental reflective functioning (PRF) is an important predictor of infant attachment, and interventions that target parent–infant/toddler dyads who are experiencing significant problems have the potential to improve PRF. A range of dyadic interventions have been developed over the past two decades, some of which explicitly target PRF as part ...
Jane Barlow   +2 more
wiley   +1 more source

Modeling of curves by a design-control approximating refinement scheme

open access: yesArab Journal of Basic and Applied Sciences, 2023
This paper introduces a modified method for construction of a new design-control 6-point approximating refinement scheme. The construction of the new scheme is based on translation of the points of 4-point approximating refinement scheme to the new ...
Rabia Hameed   +4 more
doaj   +1 more source

A New Filled Function for Global Optimization

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2023
The filled function method has recently become very popular in optimization theory, as it is an e cient and e ective method for finding the global minimizer of multimodal functions.
Şahiner Ahmet   +2 more
doaj   +1 more source

Nonparametric relative recursive regression

open access: yesDependence Modeling, 2020
In this paper, we propose the problem of estimating a regression function recursively based on the minimization of the Mean Squared Relative Error (MSRE), where outlier data are present and the response variable of the model is positive.
Slaoui Yousri, Khardani Salah
doaj   +1 more source

A Variational Model for Data Fitting on Manifolds by Minimizing the Acceleration of a Bézier Curve

open access: yesFrontiers in Applied Mathematics and Statistics, 2018
We derive a variational model to fit a composite Bézier curve to a set of data points on a Riemannian manifold. The resulting curve is obtained in such a way that its mean squared acceleration is minimal in addition to remaining close the data points. We
Ronny Bergmann   +1 more
doaj   +1 more source

About the Algebraic Solutions of Smallest Enclosing Cylinders Problems [PDF]

open access: yes, 2011
Given n points in Euclidean space E^d, we propose an algebraic algorithm to compute the best fitting (d-1)-cylinder. This algorithm computes the unknown direction of the axis of the cylinder.
E. Schömer   +11 more
core   +1 more source

How to Obtain Long Term Projections for Smoking Behaviour: A Case Study in the Dutch Population

open access: yesComputational and Mathematical Methods in Medicine, Volume 10, Issue 2, Page 155-164, 2009., 2009
A state‐transition model is presented to project the prevalence rates of never, current and former smokers within the Dutch population. Changes are determined by the transition rates among these three classes: start rates, quit rates and relapse rates. Both the initial prevalence rates and transition rates are calculated from cross‐sectional data using
Maurizio Capannesi   +3 more
wiley   +1 more source

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