Results 221 to 230 of about 281,878 (266)

Computation of Invariant Tori by the Fourier Methods

SIAM Journal on Scientific Computing, 1997
Summary: We study systems of functional equations (FEs) and first-order partial differential equations (PDEs) suggested in [\textit{L. Dieci, J. Lorenz} and \textit{R. D. Russell}, SIAM J. Sci. Stat. Comput. 12, 607-647 (1991; Zbl 0725.65074) and \textit{A. C. Morlet} and \textit{J. Lorenz}, SIAM J. Numer. Anal. 29, No.
Mingyou Huang, Tassilo Küpper, Norbert Masbaum   +2 more
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The Fourier Method

1993
A survey of the basic features of the Fourier method for a grid represention of quantum mechanical wavefunctions is presented. The intention is to gain insight into the connection between the mathematical foundations and the physical applications.
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Fourier Methods

2021
Fernando Sansò, Daniele Sampietro
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The evaluation of fourier transforms by the sampling method

Automatica, 1968
The sampling method is a well known method for evaluating Fourier transforms. Since the conditions imposed by the sampling theorem cannot, generally, be satisfied exactly when one is dealing with experimental responses and signals, a number of authors have used weighted sampling methods which reduce, more or less, the error due to frequency folding ...
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Evaluation of Fourier transforms by a Fourier synthesis method

Acta Crystallographica, 1948
A convenient numerical method is developed for evaluating the Fourier transforms of arbitrary functions by the use of Beevers-Lipson strips. A detailed procedure is worked out for the determination of the radial distribution curve of an amorphous material from the X-ray diffraction intensity curve, but the method is generally applicable provided that ...
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A Block Fourier Decomposition Method

2002
In this paper, we present a parallel block decomposition method for a special class of block tridiagonal matrices K ? Rpq × pq of the form K = block-tridiag [B,A,B] and its variants, where A and B, A,B, ? Rp×p, are general square matrices. Our decomposition method is closely related to the classical fast Poisson solver using Fourier analysis (simply ...
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The Fourier Method of Crystal Structure Analysis

Nature, 1948
Alternative methods which could be used to derive accurate atomic co-ordinates from the data provided by an X-ray investigation of a crystal structure are discussed. It is shown that the customary Fourier series method is closely related to the least-squares method applied to this problem by Hughes.
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Fourier Methods

2022
Matteo Bachetti, Daniela Huppenkothen
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Fourier Methods.

The American Mathematical Monthly, 1951
J. W. Green, Philip Franklin
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A method for the discrete fractional Fourier transform computation

IEEE Transactions on Signal Processing, 2003
Min-Hung Yeh, Soo-Chang Pei
exaly