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Am Rande des Unendlichen: Numerische Verfahren fuer unbegrenzte Gebiete
(1999)SAM Research ReportIn diesem Artikel wird eine erste kurze Einführung in die Theorie der transparenten Randbedingungen gegeben, die ohne besondere Vorkenntnisse zugänglich ist. Solche Randbedingungen sind immer dann erforderlich, wenn die Lösung eines Streufeldproblems in einem unbegrenzten Gebiet numerisch berechnet werden soll. Zur Auswahl stehen dabei grundsätzlich zwei Verfahren: zum einen lokale Randbedingungen, die zwar leicht anwendbar aber ungenau ...Report -
Time Discretization of Parabolic Problems by the hp-Version of the Discontinuous Galerkin Finite Element Method
(1999)SAM Research ReportThe Discontinuous Galerkin Finite Element Method (DGFEM) for the time discretization of parabolic problems is analyzed in a hp-version context. Error bounds which are explicit in the time step as well as the approximation order are derived and it is shown that the hp-DGFEM gives spectral convergence in problems with smooth time dependence. In conjunction with geometric time partitions it is proved that the hp-DGFEM results in exponential ...Report -
A computer system for model helicopter flight control
(1999)Technical report / ETH, Departement InformatikWe describe a compiler, and in particular its generated code, translating from Oberon to binary code for the Strong−ARM RISC processor. It is a very compact single−pass system (< 50K bytes). Compiled modules are linked and down−loaded into the embedded processor. This memo is intended to provide programmers information about generated code patterns in order to be able to estimate the complexity of their programs.Report -
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A computer system for model helicopter flight control
(1999)Technical report / ETH, Departement InformatikReport