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Träfflista för sökning "swepub srt2:(1960-1979);lar1:(uu)"

Search: swepub > (1960-1979) > Uppsala University

  • Result 1-10 of 3770
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  • Engquist, Björn, et al. (author)
  • Difference and finite element methods for hyperbolic differential equations
  • 1979
  • In: Computer Methods in Applied Mechanics and Engineering. - : Elsevier BV. - 0045-7825 .- 1879-2138. ; 17-18:3, s. 581-596
  • Journal article (peer-reviewed)abstract
    • In recent years finite element methods have started to be applied to hyperbolic equations. Since modern finite element and finite difference methods for hyperbolic equations look very much alike, new results in the analysis of difference methods are also applicable to element methods. We shall discuss propagation of sharp signals, problems with different time scales and the effect of boundaries on stability and accuracy.
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9.
  • Engquist, Björn, et al. (author)
  • Numerical solution of a PDE system describing a catalytic converter
  • 1978
  • In: Journal of Computational Physics. - : Elsevier BV. - 0021-9991 .- 1090-2716. ; 27:3, s. 295-314
  • Journal article (peer-reviewed)abstract
    • Numerical approximations are studied for a large hyperbolic system coupled to a parabolic equation and a system of algebraic equations. The equations, which all are nonlinear, describe nonviscous compressible one-dimensional gas flow in a catalytic converter. Chemical reactions within the gas are included in the model. Well-posedness of the partial differential equations is analyzed together with stability of the numerical models. In particular an investigation is made of the effect of numerical dissipation and different boundary conditions. Numerical results are presented.
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10.
  • Engquist, Björn, et al. (author)
  • Radiation boundary conditions for acoustic and elastic wave calculations
  • 1979
  • In: Communications on Pure and Applied Mathematics. - : Wiley. - 0010-3640 .- 1097-0312. ; 32:3, s. 314-358
  • Journal article (peer-reviewed)abstract
    • A technique for developing radiating boundary conditions for artificial computational boundaries is described and applied to a class of problems typical in exploration seismology involving acoustic and elastic wave equations. First, one considers a constant coefficient scalar wave equation where the artificial boundary is one edge of a rectangular domain. By using continued fraction expansions, a systematic sequence of stable highly absorbing boundary conditions with successively better absorbing properties as the order of the boundary conditions increases is obtained. There follows a systematic derivation of a hierarchy of local radiating boundary conditions for the elastic wave equation. A theoretical procedure to guarantee stability at corners of the rectangular domain is worked out. A technique for fitting the discrete radiating boundary conditions directly to the difference scheme itself is proposed.
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  • Result 1-10 of 3770
Type of publication
doctoral thesis (1384)
journal article (819)
review (635)
book (376)
editorial collection (204)
reports (141)
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book chapter (66)
research review (51)
conference paper (40)
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Type of content
other academic/artistic (2981)
peer-reviewed (673)
pop. science, debate, etc. (116)
Author/Editor
Smedby, B (98)
Tove, PA (83)
Olovsson, Ivar (47)
Engwall, Lars (31)
Burns, Tom R. (30)
Gustafsson, Lars (28)
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Kreiss, Heinz-Otto (27)
Frängsmyr, Tore (27)
Tornstam, Lars (26)
Berg, Sören (26)
Andersson, LP (25)
Sallander, Hans, 190 ... (22)
Berfenstam, R. (21)
Olsson, Bernt (21)
Petersson, CS (19)
Bergsten, Staffan (19)
Bäckström, Anders, 1 ... (19)
Karlsson, Thomas (18)
Hallberg, Peter (18)
Frykman, Erik (17)
Fredén, Gustaf (17)
Jonsson, Inge (17)
Algulin, Ingemar (16)
Sandberg, Thomas (16)
Baumgartner, Thomas (16)
Peterson, Lennart (15)
Lindberg, Helge (15)
Strömholm, Stig (14)
Linnér, Sven (14)
Bergsten, Gunilla (13)
Jonsell, Lena (13)
Lundqvist, Nils (13)
Rundgren, Frithiof (13)
Gustafsson, Bertil (12)
Norde, Herman (12)
Brunius, Teddy (12)
Segerstedt, Torgny T ... (12)
Johannesson, Kurt (12)
Bengtsson, Bertil (11)
DeVille, Philippe (11)
Hägg, Ingemund (10)
Vinge, Louise (10)
Trost, Jan, 1935- (10)
Nilsson, Nils Åke (10)
Meeker, L. David (10)
Elmevik, Lennart, 19 ... (10)
Espmark, Kjell (10)
Fries, Sigurd, 1924- ... (10)
Jöreskog, K.G. (10)
Lindström, Hans (10)
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University
Uppsala University  (3770)Undo refine
Linköping University (4)
Royal Institute of Technology (3)
The Nordic Africa Institute (3)
Umeå University (2)
Stockholm University (1)
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Jönköping University (1)
Mid Sweden University (1)
Södertörn University (1)
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Language
English (1945)
Swedish (1630)
German (106)
French (52)
Polish (9)
Danish (8)
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Norwegian (8)
Latin (3)
Spanish (3)
Russian (2)
Arabic (2)
Finnish (1)
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Research subject (UKÄ/SCB)
Humanities (1498)
Natural sciences (358)
Social Sciences (263)
Medical and Health Sciences (173)
Engineering and Technology (3)

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