Results 1 to 10 of about 522,505 (136)

Mathematical models and soil fertility management software [PDF]

open access: yesE3S Web of Conferences, 2020
The article presents the results of studies on parametric approximation in spaces R2 (functions of one variable), R3 (functions of two variables) and Rn(n>3) (functions of three or more variables).
Mitrofanov Sergey   +3 more
doaj   +1 more source

Approximation of Hysteresis Changes in Electrical Steel Sheets

open access: yesEnergies, 2021
This paper describes a simple method of approximating hysteresis changes in electrical steel sheets. This method is based on assumptions that flux density or field strength changes are a sum or a difference of functions that describe one curve of the ...
Witold Mazgaj   +2 more
doaj   +1 more source

On stochastic accelerated gradient with non-strongly convexity

open access: yesAIMS Mathematics, 2022
In this paper, we consider stochastic approximation algorithms for least-square and logistic regression with no strong-convexity assumption on the convex loss functions.
Yiyuan Cheng   +3 more
doaj   +1 more source

Multiplicative Approximations, Optimal Hypervolume Distributions, and the Choice of the Reference Point [PDF]

open access: yes, 2013
Many optimization problems arising in applications have to consider several objective functions at the same time. Evolutionary algorithms seem to be a very natural choice for dealing with multi-objective problems as the population of such an algorithm ...
Friedrich, Tobias   +2 more
core   +2 more sources

Data from multimodal functions based on an array of photovoltaic modules and an approximation with artificial neural networks as a scenario for testing optimization algorithms

open access: yesData in Brief, 2019
This paper presents the data of multimodal functions that emulate the performance of an array of five photovoltaic modules under partial shading conditions.
Carlos Robles-Algarín   +2 more
doaj   +1 more source

Guaranteed Automatic Integration Library (GAIL): An Open-Source MATLAB Library for Function Approximation, Optimization, and Integration

open access: yesJournal of Open Research Software, 2022
Function approximation, integration, and optimization are three fundamental mathematical problems. They are especially challenging when the functions involved fluctuate wildly in certain parts of the domain, or if the domain is high dimensional. Ideally,
Xin Tong   +9 more
doaj   +1 more source

GENERALIZED ATOMIC WAVELETS

open access: yesРадіоелектронні і комп'ютерні системи, 2018
The problem of big data sets processing is considered. Efficiency of algorithms depends mainly on the appropriate mathematical tools. Now there exists a wide variety of different constructive tools for information analysis.
Iryna Victorivna Brysina   +1 more
doaj   +1 more source

Adaptive Galerkin approximation algorithms for partial differential equations in infinite dimensions [PDF]

open access: yes, 2011
Space-time variational formulations of infinite-dimensional Fokker-Planck (FP) and Ornstein-Uhlenbeck (OU) equations for functions on a separable Hilbert space $H$ are developed.
Schwab, Christoph, Suli, Endre
core   +2 more sources

Simple Synchronous and Asynchronous Algorithms for Distributed Minimax Optimization

open access: yesSICE Journal of Control, Measurement, and System Integration, 2017
Synchronous and asynchronous algorithms are presented for distributed minimax optimization. The objective here is to realize the minimization of the maximum of component functions over the standard multi-agent network, where each node of the network ...
Kenta Hanada   +3 more
doaj   +1 more source

Approximation method for a fractional order transfer function with zero and pole

open access: yesArchives of Control Sciences, 2014
The paper presents an approximation method for elementary fractional order transfer function containing both pole and zero. This class of transfer functions can be applied for example to build model - based special control algorithms. The proposed method
Oprzędkiewicz Krzysztof
doaj   +1 more source

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