Results 11 to 20 of about 302,091 (291)

Using an Opportunity Matrix to Select Centers for RBF Neural Networks

open access: yesAlgorithms, 2023
When designed correctly, radial basis function (RBF) neural networks can approximate mathematical functions to any arbitrary degree of precision. Multilayer perceptron (MLP) neural networks are also universal function approximators, but RBF neural ...
Daniel S. Soper
doaj   +1 more source

Zeros of Approximate Functional Approximations [PDF]

open access: yesMathematics of Computation, 1967
The gN(s) are of interest as approximations to the Riemann zeta function. Let s = or + it. In [1], it was shown that for t sufficiently large, gi(s) and g2(s) have their zeros on the critical line ar = 2. After encountering analytical difficulties in attempting to extend this theorem to further N, the calculations described below were undertaken.
openaire   +2 more sources

Linear and Quadratic Interpolators Using Truncated-Matrix Multipliers and Squarers

open access: yesComputers, 2015
This paper presents a technique for designing linear and quadratic interpolators for function approximation using truncated multipliers and squarers. Initial coefficient values are found using a Chebyshev-series approximation and then adjusted through ...
E. George Walters III
doaj   +1 more source

On the Universally Optimal Activation Function for a Class of Residual Neural Networks

open access: yesAppliedMath, 2022
While non-linear activation functions play vital roles in artificial neural networks, it is generally unclear how the non-linearity can improve the quality of function approximations.
Feng Zhao, Shao-Lun Huang
doaj   +1 more source

Optimization of Turbulence Model Parameters Using the Global Search Method Combined with Machine Learning

open access: yesMathematics, 2022
The paper considers the slope flow simulation and the problem of finding the optimal parameter values of this mathematical model. The slope flow is modeled using the finite volume method applied to the Reynolds-averaged Navier–Stokes equations with ...
Konstantin Barkalov   +5 more
doaj   +1 more source

Approximate Atomic Green Functions [PDF]

open access: yesMolecules, 2021
In atomic and many-particle physics, Green functions often occur as propagators to formally represent the (integration over the) complete spectrum of the underlying Hamiltonian. However, while these functions are very crucial to describing many second- and higher-order perturbation processes, they have hardly been considered and classified for complex ...
Stephan Fritzsche, Andrey Surzhykov
openaire   +4 more sources

Approximately Subharmonic Functions [PDF]

open access: yesProceedings of the American Mathematical Society, 1952
for 0
openaire   +1 more source

Uniform Approximation of Functions with Discrete Approximation Functionals

open access: yesJournal of Approximation Theory, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chandler, Colston, Gibson, Archie G.
openaire   +1 more source

THE SOLUTION OF THE APPROXIMATION PROBLEM OF NONLINEAR DEPENDANCES USING ARTIFICIAL NEURAL NETWORKS

open access: yesНаучный вестник МГТУ ГА, 2018
The paper discusses issues connected with the use of an artificial neural network (ANN) to approximate the experimental data. One of the problems in the development of the ANN is the choice of an appropriate activation function for neurons of the hidden ...
V. N. Ageyev
doaj   +1 more source

Approximations to Kelvin Functions [PDF]

open access: yesMathematics of Computation, 1963
While preparing a digital computer program to examine the behavior of largetaper hub flanges, it was found necessary to use approximations to the Kelvin functions ber x, bei x, ker x, and kei x, and to their first derivatives. To obtain full machine accuracy, the approximations were required to be correct to nine significant figures.
openaire   +2 more sources

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