Results 31 to 40 of about 3,102,564 (352)

The renewal equation in nonlinear approximation

Математичні Студії, 2021
The family of Markov processes are considered in the article. We study the multidimensional renewal equation in nonlinear approximation. The purpose of the work is to find the limit of renewal function.
O.A. Yarova, Ya.I. Yeleyko
doaj   +1 more source

Implementing nonlinear Compton scattering beyond the local-constant-field approximation [PDF]

Physical Review A, 2017
In the calculation of probabilities of physical processes occurring in a background classical field, the local-constant-field approximation (LCFA) relies on the possibility of neglecting the space-time variation of the external field within the region of
A. Piazza, M. Tamburini, S. Meuren, S. Meuren, C. Keitel   +4 more
semanticscholar   +1 more source

Nonlinear Methods for Model Reduction

, 2020
The usual approach to model reduction for parametric partial differential equations (PDEs) is to construct a linear space $V_n$ which approximates well the solution manifold $\mathcal{M}$ consisting of all solutions $u(y)$ with $y$ the vector of ...
Bonito, Andrea, Cohen, Albert, DeVore, Ronald, Guignard, Diane, Jantsch, Peter, Petrova, Guergana   +5 more
core   +2 more sources

An Iterative Method Based on the Marginalized Particle Filter for Nonlinear B-Spline Data Approximation and Trajectory Optimization

Mathematics, 2019
The B-spline function representation is commonly used for data approximation and trajectory definition, but filter-based methods for nonlinear weighted least squares (NWLS) approximation are restricted to a bounded definition range.
Jens Jauch, Felix Bleimund, Michael Frey, Frank Gauterin   +3 more
doaj   +1 more source

Mode coupling in the nonlinear response of black holes [PDF]

, 2003
We study the properties of the outgoing gravitational wave produced when a non-spinning black hole is excited by an ingoing gravitational wave. Simulations using a numerical code for solving Einstein's equations allow the study to be extended from the ...
C. Cutler, D. Shoemaker, E. Newman, E.E. Flanagan, H. Bondi, H.-J. Yo, H.-P. Nollert, J. Baker, J. Baker, J. Pullin, Jeffrey Winicour, L. Blanchet, L. Lehner, L. Lehner, Luis Lehner, M. Alcubierre, M. Campanelli, M.A. Scheel, N.T. Bishop, N.T. Bishop, P. Papadopoulos, P.R. Brady, R. Gomez, R. Gomez, R. Gómez, R. Gómez, R. Sachs, Roberto Gómez, S. Husa, S.A. Hughes, S.A. Teukolsky, S.A. Teukolsky, Sascha Husa, T. Damour, T.W. Baumgarte, Yosef Zlochower   +35 more
core   +3 more sources

On input/output maps for nonlinear systems via continuity in a locally convex topology [PDF]

, 1995
In this paper we show that the output of a nonlinear system with inputs in () whose state satisfies a nonlinear differential equation with standard smoothness conditions can be written as the composition of a nonlinear map with a linear Hilbert-Schmidt ...
Bagchi, Arunabha, Kannurpatti, Raghavan, Mazumdar, Ravi R.   +2 more
core   +7 more sources

Medical Image Fusion Algorithm Based on Nonlinear Approximation of Contourlet Transform and Regional Features

Journal of Electrical and Computer Engineering, 2017
According to the pros and cons of contourlet transform and multimodality medical imaging, here we propose a novel image fusion algorithm that combines nonlinear approximation of contourlet transform with image regional features.
Hui Huang, Xi'an Feng, Jionghui Jiang
semanticscholar   +1 more source

Nonlinear Approximations in Cryptanalysis Revisited

IACR Transactions on Symmetric Cryptology, 2018
This work studies deterministic and non-deterministic nonlinear approximations for cryptanalysis of block ciphers and cryptographic permutations and embeds it into the well-understood framework of linear cryptanalysis.
Christof Beierle, Anne Canteaut, Gregor Leander   +2 more
doaj   +1 more source

A Meshfree Approach for Solving Fractional Galilei Invariant Advection–Diffusion Equation through Weighted–Shifted Grünwald Operator

Mathematics, 2022
Fractional Galilei invariant advection–diffusion (GIADE) equation, along with its more general version that is the GIADE equation with nonlinear source term, is discretized by coupling weighted and shifted Grünwald difference approximation formulae and ...
Farzaneh Safari, Qingshan Tong, Zhen Tang, Jun Lu   +3 more
doaj   +1 more source

Nonlinear tensor product approximation of functions [PDF]

, 2014
We are interested in approximation of a multivariate function $f(x_1,\dots,x_d)$ by linear combinations of products $u^1(x_1)\cdots u^d(x_d)$ of univariate functions $u^i(x_i)$, $i=1,\dots,d$.
Bazarkhanov, D., Temlyakov, V.
core   +1 more source