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Träfflista för sökning "L773:0036 1399 srt2:(1985-1989)"

Search: L773:0036 1399 > (1985-1989)

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1.
  • Bamberger, A, et al. (author)
  • Higher order paraxial wave equation approximations in heterogeneous media
  • 1988
  • In: SIAM Journal on Applied Mathematics. - : Society for Industrial & Applied Mathematics (SIAM). - 0036-1399 .- 1095-712X. ; 48, s. 129-154
  • Journal article (peer-reviewed)abstract
    • A new family of paraxial wave equation approximations is derived. These approximations are of higher order accuracy than the parabolic approximation and they can be applied to the same computational problems, e.g., in seismology, underwater acoustics and as artificial boundary conditions. The equations are written as systems which simplify computations. The support and singular support are studied; energy estimates are given which prove the well-posedness. The reflection and transmission are shown to be continuously dependent on material interfaces in heterogeneous media
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2.
  • Bamberger, A, et al. (author)
  • Parabolic wave equation approximations in heterogenous media
  • 1988
  • In: SIAM Journal on Applied Mathematics. - 0036-1399 .- 1095-712X. ; 48, s. 99-128
  • Journal article (peer-reviewed)abstract
    • The properties of different variants of parabolic approximations of scalar wave equations are analyzed. These equations are of general form which includes those used in seismology, underwater acoustics and other applications. A new version of the parabolic approximation is derived for heterogeneous media. It has optimal properties with respect to wave reflection at material interfaces. The amplitud of the reflected and transmitted waves depend continuously on the interface. Existence, uniqueness and energy estimates are proved.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Bamberger, A. (2)
Engquist, Björn (2)
Halpern, L (2)
Joly, P (2)
University
Royal Institute of Technology (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)
Year
1988 (2)

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