Search
Results
-
Alignment of nucleotide with peptide sequences
(1992)ETH, Eidgenössische Technische Hochschule Zürich, Departement Informatik, Institut für Wissenschaftliches RechnenReport -
Automatic tuning of data placement and load balancing in disk arrays
(1992)ETH, Eidgenössische Technische Hochschule Zürich, Departement Informatik, Institut für Informationssysteme 175Report -
Limit computation in computer algebra
(1992)ETH, Eidgenössische Technische Hochschule Zürich, Departement Informatik, Institut für Wissenschaftliches RechnenReport -
Is the transonic flow around a cylinder always periodic?
(1992)SAM Research ReportThe inviscid transonic flow about a circular cylinder is investigated at large times. For this scope the Euler equations are integrated numerically, according to a time dependent technique. The integration is based on an high resolution finite volume upwind method. Transitions to qualitatively different families of solutions have been observed by increasing the value of the free stream Mach number from 0.5 up to 1. In particular the ...Report -
Integration of stiff mechanical systems by Runge-Kutta methods
(1992)SAM Research ReportThe numerical integration of stiff mechanical systems is studied in which a strong potential forces the motion to remain close to a manifold. The equations of motion are written as a singular singular perturbation problem with a small stiffness parameter $\epsilon$. Smooth solutions of such systems are characterized, in distinction to highly oscillatory general solutions. Implicit Runge-Kutta methods using step sizes larger than $\epsilon$ ...Report -
Numerical Solution of the Riemann Problem for Two-Fimensional Gas Dynamics
(1992)SAM Research ReportThe Riemann problem for two-dimensional gas dynamics with isentropic and polytropic gas is considered. The initial data is constant in each quadrant and chosen so that only a rarefaction wave, shock wave or slip line connects two neighboring constant initial states. With this restriction sixteen (resp. fifteen) genuinely different wave combinations for isentropic (resp. polytropic) gas exist. For each configuration the numerical solution ...Report -
Smooth attractive invariant manifolds of singularly perturbed ODE's
(1992)SAM Research ReportUnder hypotheses suitable for applications an invariant manifold result for singularly perturbed ODE's is proved with sharp smoothness properties of the manifold.Report -
One-dimensional front tracking based on high resolution wave propagation methods
(1992)SAM Research ReportWe present a simple approach to shock tracking in conjunction with conservative high resolution shock-capturing methods in one space dimension. An underlying uniform grid is used with additional grid interfaces introduced at appropriate points for tracked shocks. Conservative high resolution methods based on the large time step wave propagation approach are used on the resulting nonuniform grid. This method is stable even if some of the ...Report -
GIPSY: a generator for incremental programming systems
(1992)TIK ReportGIPSY (Generator for Incremental Programming Systems) is an experimental system, which produces incremental programming environments from a given language definition. Besides its tasks in a conventional environment, the compiler of a GIPSY generated system serves as a program base by making syntax and semantic information about a program accessible to other tools. The compiler manages a program internally in a general data model and offers ...Report -
The influence of a source term, an example: chemically reacting hypersonic flow
(1992)SAM Research ReportWe show, by way of an example, that the solution of a system of hyperbolic conservation laws exhibits an unexpected behavior if a source term is present. The example is the system of Euler equations for N species in two space dimensions. If the source term is not present and in the initial and inflow conditions a fixed mixture of species is prescribed then the solution basically behaves like the flow of an ideal gas, except that there are ...Report