Results 1 to 10 of about 90,056 (287)

Optimizing the neural network and iterated function system parameters for fractal approximation using a modified evolutionary algorithm [PDF]

Scientific Reports
Fractal interpolation has gained significant attention due to its ability to model complex, self-similar structures with high precision. However, optimizing the parameters of Iterated Function System (IFS)-based fractal interpolants remains a challenging
Sana Abdulla, K. Mahipal Reddy
doaj   +2 more sources

Approximating Probability Densities by Iterated Laplace Approximations [PDF]

Journal of Computational and Graphical Statistics, 2011
The Laplace approximation is an old, but frequently used method to approximate integrals for Bayesian calculations. In this paper we develop an extension of the Laplace approximation, by applying it iteratively to the residual, i.e., the difference ...
Ardia D., Björn Bornkamp, Goldfarb D., Minka T.   +3 more
core   +2 more sources

Optimization of the mean-square approximation procedures for iterated Stratonovich stochastic integrals of multiplicities 1 to 3 with respect to components of the multi-dimensional Wiener process based on Multiple Fourier–Legendre series [PDF]

MATEC Web of Conferences, 2022
The article is devoted to approximation of iterated Ito and Stratonovich stochastic integrals of multiplicities 1 to 3 by the method of multiple Fourier–Legendre series.
Kuznetsov Dmitriy, Kuznetsov Mikhail
doaj   +1 more source

Analyzing Approximate Value Iteration Algorithms [PDF]

Mathematics of Operations Research, 2022
In this paper, we consider the stochastic iterative counterpart of the value iteration scheme wherein only noisy and possibly biased approximations of the Bellman operator are available. We call this counterpart the approximate value iteration (AVI) scheme.
Arunselvan Ramaswamy, Shalabh Bhatnagar
openaire   +2 more sources

Homogeneous Approximation of One- Dimensional Series of Iterated Integrals and Time Optimality

Journal of Optimization, Differential Equations and Their Applications, 2023
In the paper we consider nonlinear systems depending linearly on control with one-dimensional output. As is well known, under the analyticity requirement, the output can be expressed as a series of iterated integrals of controls with scalar coefficients.
Daria M. Andreieva, Svetlana Yu. Ignatovich   +1 more
doaj   +1 more source

Accelerated Iterated Filtering

Austrian Journal of Statistics, 2023
Simulation-based inferences have attracted much attention in recent years, as the direct computation of the likelihood function in many real-world problems is difficult or even impossible.
Dao Nguyen
doaj   +1 more source

An Iterative Process for Approximating Subactions [PDF]

, 2021
We describe a procedure based on the iteration of an initial function by an appropriated operator, acting on continuous functions, in order to get a fixed point. This fixed point will be a calibrated subaction for the doubling map on the circle and a fixed Lipschitz potential.
Ferreira, Hermes H., Lopes, Artur O., Oliveira, Elismar R.   +2 more
openaire   +2 more sources

Homogeneous approximation for minimal realizations of series of iterated integrals

Visnik Harkivsʹkogo Nacionalʹnogo Universitetu im. V.N. Karazina. Cepiâ Matematika, Prikladna Matematika i Mehanika, 2022
In the paper, realizable series of iterated integrals with scalar coefficients are considered and an algebraic approach to the homogeneous approximation problem for nonlinear control systems with output is developed.
D. M. Andreieva, S. Yu. Ignatovich
doaj   +1 more source

Approximate iterations for structured matrices [PDF]

Numerische Mathematik, 2008
The paper deals with the evaluation of a matrix-valued function \(f(A)\), where \(A\) is a large matrix with a special structure. The authors present a transformation of an iterative fixed-point like process, under certain general assumptions, into another process which preserves the convergence rate and benefits from the underlying structure ...
Wolfgang Hackbusch, Boris N. Khoromskij, Eugene E. Tyrtyshnikov   +2 more
openaire   +1 more source

Iterative Thresholding for Sparse Approximations [PDF]

Journal of Fourier Analysis and Applications, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Blumensath, Thomas, Davies, Mike E.
openaire   +2 more sources