Results 61 to 70 of about 1,056,028 (181)

Optimal Fourth-Order Methods for Multiple Zeros: Design, Convergence Analysis and Applications

open access: yesAxioms
Nonlinear equations are frequently encountered in many areas of applied science and engineering, and they require efficient numerical methods to solve. To ensure quick and precise root approximation, this study presents derivative-free iterative methods ...
Sunil Kumar   +2 more
doaj   +1 more source

Derivative-free neural network for optimizing the scoring functions associated with dynamic programming of pairwise-profile alignment

open access: yesAlgorithms for Molecular Biology, 2018
Background A profile-comparison method with position-specific scoring matrix (PSSM) is among the most accurate alignment methods. Currently, cosine similarity and correlation coefficients are used as scoring functions of dynamic programming to calculate ...
Kazunori D. Yamada
doaj   +1 more source

On the Convergence of a Kurchatov-Type Method for Solving Nonlinear Equations and Its Applications

open access: yesAppliedMath
A local and a semi-local convergence analysis are presented for the Kurchatov-type method to solve numerically nonlinear equations in a Banach space. The method depends on a real parameter. By specializing the parameter, we obtain methods already studied
Ioannis K. Argyros   +2 more
doaj   +1 more source

Training a Feed-forward Neural Network with Artificial Bee Colony Based Backpropagation Method

open access: yes, 2012
Back-propagation algorithm is one of the most widely used and popular techniques to optimize the feed forward neural network training. Nature inspired meta-heuristic algorithms also provide derivative-free solution to optimize complex problem. Artificial
Das, Achintya   +2 more
core   +1 more source

Calibrating the GAMIL3-1° climate model using a derivative-free optimization method [PDF]

open access: yesGeoscientific Model Development
Parameterization in climate models often involves parameters that are poorly constrained by observations or theoretical understanding alone. Manual tuning by experts can be time-consuming, subjective, and prone to underestimating uncertainties. Automated
W. Liang   +10 more
doaj   +1 more source

StepDIRECT - A Derivative-Free Optimization Method for Stepwise Functions

open access: yes, 2022
In this paper, we propose the StepDIRECT algorithm for derivative-free optimization (DFO), in which the black-box objective function has a stepwise landscape. Our framework is based on the well-known DIRECT algorithm. By incorporating the local variability to explore the flatness, we provide a new criterion to select the potentially optimal hyper ...
Phan, Dzung T.   +2 more
openaire   +2 more sources

Two Optimal Eighth‐Order Derivative‐Free Classes of Iterative Methods [PDF]

open access: yesAbstract and Applied Analysis, 2012
Optimization problems defined by (objective) functions for which derivatives are unavailable or available at an expensive cost are emerging in computational science. Due to this, the main aim of this paper is to attain as high as possible of local convergence order by using fixed number of (functional) evaluations to find efficient solvers for one ...
Soleymani, F., Shateyi, S.
openaire   +4 more sources

On Derivative-Free Optimisation Methods

open access: yes, 2023
As part of the field of mathematical optimisation, derivative-free optimisation is the study of optimisation methods that are not granted full access to the derivative of the objective function. In this master's thesis, three derivative-free optimisation methods known from the literature that do not use the derivatives have been studied, namely the ...
openaire   +1 more source

Inertial-Based Derivative-Free Method for System of Monotone Nonlinear Equations and Application

open access: yesIEEE Access, 2020
Iterative methods for solving nonlinear problems are of great importance due to their appearance in various areas of applications. In this paper, based on the inertial effect, we propose two projection derivative-free iterative methods for solving system
Aliyu Muhammed Awwal   +4 more
doaj   +1 more source

Convergence Analysis and Complex Geometry of an Efficient Derivative-Free Iterative Method

open access: yesMathematics, 2019
To locate a locally-unique solution of a nonlinear equation, the local convergence analysis of a derivative-free fifth order method is studied in Banach space.
Deepak Kumar   +2 more
doaj   +1 more source

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