Results 1 to 10 of about 78,549 (246)

A Two-Dimensional Variant of Newton’s Method and a Three-Point Hermite Interpolation: Fourth- and Eighth-Order Optimal Iterative Schemes

open access: yesMathematics, 2023
A nonlinear equation f(x)=0 is mathematically transformed to a coupled system of quasi-linear equations in the two-dimensional space. Then, a linearized approximation renders a fractional iterative scheme xn+1=xn−f(xn)/[a+bf(xn)], which requires one ...
Chein-Shan Liu   +2 more
doaj   +5 more sources

An optimal three-point eighth-order iterative method without memory for solving nonlinear equations with its dynamics [PDF]

open access: yesJapan Journal of Industrial and Applied Mathematics, 2016
arXiv admin note: substantial text overlap with arXiv:1508 ...
Gunar Matthies   +3 more
exaly   +9 more sources

Comparison of some optimal derivative-free three-point iterations

open access: yesJournal of Numerical Analysis and Approximation Theory, 2020
We show that the well-known Khattri et al. methods and Zheng et al. methods are identical. In passing, we propose a suitable calculation formula for Khattri et al. methods.
Thugal Zhanlav, Khuder Otgondorj
doaj   +7 more sources

Facial Pose Estimation Method on Single Image Based on Facial Feature Points [PDF]

open access: yesJisuanji gongcheng, 2021
To deal with the high requirements of learning-based pose estimation methods on training samples and devices,this paper proposes a method based on facial feature point positioning that can estimate the facial pose in a single image without training.By ...
FU Youjia
doaj   +1 more source

New efficient bi-parametric families of iterative methods with engineering applications and their basins of attraction

open access: yesResults in Control and Optimization, 2023
We present in this paper two new families of bi-parametric multipoint higher order iterative methods of optimal order for determining simple roots of the nonlinear equation Ω(s)=0.
G Thangkhenpau   +2 more
doaj   +1 more source

Image quality and dose reduction in sinus computed tomography using iterative reconstruction: a cadaver study [PDF]

open access: yesRhinology Online, 2021
Introduction: Concerns about radiation dose in computed tomography (CT) imaging have renewed interest in iterative reconstruction (IR), a technique which has the potential to produce images with less noise at lower radiation doses than traditional ...
Adam J. Kimple   +8 more
doaj   +1 more source

An Optimal Iterative Technique for Multiple Root Finder of Nonlinear Problems

open access: yesMathematical and Computational Applications, 2022
In this paper, an optimal higher-order iterative technique to approximate the multiple roots of a nonlinear equation has been presented. The proposed technique has special properties: a two-point method that does not involve any derivatives, has an ...
Ramandeep Behl   +3 more
doaj   +1 more source

A Derivative Free Fourth-Order Optimal Scheme for Applied Science Problems

open access: yesMathematics, 2022
We suggest a new and cost-effective iterative scheme for nonlinear equations. The main features of the presented scheme are that it does not involve any derivative in the structure, achieves an optimal convergence of fourth-order factors, has more ...
Ramandeep Behl
doaj   +1 more source

A Recursive Conic Approximation for Solving the Optimal Power Flow Problem in Bipolar Direct Current Grids

open access: yesEnergies, 2023
This paper proposes a recursive conic approximation methodology to deal with the optimal power flow (OPF) problem in unbalanced bipolar DC networks. The OPF problem is formulated through a nonlinear programming (NLP) representation, where the objective ...
Oscar Danilo Montoya   +2 more
doaj   +1 more source

GLACIER VOLUME CHANGE MONITORING FROM UAV OBSERVATIONS: ISSUES AND POTENTIALS OF STATE-OF-THE-ART TECHNIQUES [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Alpine glaciers play a key role in our society through the production of freshwater for domestic, industrial and agricultural use. As they are severely affected by climate change, it is of crucial importance to understand their behaviour and monitor ...
M. Di Rita   +5 more
doaj   +1 more source

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