Results 31 to 40 of about 163,100 (319)

Application of multisection recursive convolution in 3D FETD-FABC simulations [PDF]

open access: yes, 2008
The multisection recursive convolution (MS-RC) methodology is successfully applied to the finite element time domain floquet absorbing boundary condition modeling of doubly periodic structures.
Cai, Yong   +3 more
core   +1 more source

Generalized transforms and convolutions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1997
In this paper, using the concept of a generalized Feynman integral, we define a generalized Fourier-Feynman transform and a generalized convolution product.
Timothy Huffman   +2 more
doaj   +1 more source

Hartley transform and the use of the Whitened Hartley spectrum as a tool for phase spectral processing

open access: yesThe Journal of Engineering, 2015
The Hartley transform is a mathematical transformation which is closely related to the better known Fourier transform. The properties that differentiate the Hartley Transform from its Fourier counterpart are that the forward and the inverse transforms ...
Ioannis Paraskevas   +2 more
doaj   +1 more source

Generalized convolutions V [PDF]

open access: yesStudia Mathematica, 1973
This paper is a continuation of part III, ibid. 80, 167-189 (1984; Zbl 0561.60019). It deals with generalized convolution algebras (\({\mathcal P},\circ)\), i.e. \({\mathcal P}\) is the set of all probability measures on the positive half-line and ``\(\circ ''\) is a generalized convolution of measures from \({\mathcal P}\).
openaire   +7 more sources

LSTM-CNN Architecture for Human Activity Recognition

open access: yesIEEE Access, 2020
In the past years, traditional pattern recognition methods have made great progress. However, these methods rely heavily on manual feature extraction, which may hinder the generalization model performance.
Kun Xia, Jianguang Huang, Hanyu Wang
doaj   +1 more source

Two Convolution Transforms which are Inverted by Convolutions [PDF]

open access: yesProceedings of the American Mathematical Society, 1963
Abstract : Mathematical research concerning the inversion of a convolution transform in which the kernel is a Legendre polynomial is presented. Classes of integral equations of the sort studied here arise in the determination of solutions of certain velocity-potential problems in aerodynamics. (Author)
openaire   +1 more source

Convergence of random walks on double transitive group generated by its permutational character

open access: yesVisnik Harkivsʹkogo Nacionalʹnogo Universitetu im. V.N. Karazina. Cepiâ Matematika, Prikladna Matematika i Mehanika, 2019
Let $P$ be a probability on a finite group $G$, $U(g)=\frac{1}{|G|}$ the uniform (trivial) probability on the group $G$, $P^{(n)}=P *\ldots*P$ an $n$-fold convolution of $P$.
Aleksandr L. Vyshnevetskiy
doaj   +1 more source

On an Arithmetic Convolution [PDF]

open access: yesCanadian Mathematical Bulletin, 1977
In this paper the congruence (f ∘ g)(n) = 0 (mod n) and the functional equation f ∘ f ∘ … ∘ f = g, are studied, where ∘ is an exponential regular convolution.
openaire   +2 more sources

Faster 3D finite element time domain : Floquet absorbing boundary condition modelling using recursive convolution and vector fitting [PDF]

open access: yes, 2009
A recursive convolution (RC) based on the vector fitting (VF) method and triangular temporal basis functions is employed to compute the Floquet absorbing boundary condition (FABC) formulation in the vector 3D finite element time-domain (FETD) modelling ...
Cai, Yong, Mias, Christos
core   +1 more source

A Novel Piecewise Linear Recursive Convolution Approach for Dispersive Media Using the Finite-Difference Time-Domain Method [PDF]

open access: yes, 2014
Two novel methods for implementing recursively the convolution betweenthe electric field and a time dependent electric susceptibility function inthe finite-difference time domain (FDTD) method are presented.
Giannakis, Iraklis   +2 more
core   +1 more source

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