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An optimal 9-point, finite-difference, frequency-space, 2-D scalar wave extrapolator

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Authors
Jo, Churl-Hyun; Shin, Changsoo; Suh, Jung Hee
Issue Date
1996
Publisher
Society of Exploration Geophysicists (SEG)
Citation
Geophysics, 61, 529-537
Abstract
In this study, a new finite-difference technique is
designed to reduce the number of grid points needed in
frequency-space domain modeling. The new algorithm
uses optimal nine-point operators for the approximation
of the Laplacian and the mass acceleration terms. The
coefficients can be found by using the steepest descent
method so that the best normalized phase curves can be
obtained.
ABSTRACT
This method reduces the number of grid points per
wavelength to 4 or less, with consequent reductions of
computer memory and CPU time that are factors of tens
less than those involved in the conventional secondorder
approximation formula when a band type solver is
used on a scalar machine.
ISSN
0016-8033
Language
English
URI
http://hdl.handle.net/10371/6111
DOI
https://doi.org/10.1190/1.1443979
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Energy Systems Engineering (에너지시스템공학부)Journal Papers (저널논문_에너지시스템공학부)
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