Sökning: "convergence"

Visar resultat 11 - 15 av 822 avhandlingar innehållade ordet convergence.

1. 11. Convergence Acceleration for Flow Problems

   Författare :Henrik Brandén; Sverker Holmgren; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computational fluid dynamics; convergence acceleration; semicirculant preconditioning; fundamental solutions; Numerical Analysis; Numerisk analys;

   Sammanfattning : Convergence acceleration techniques for the iterative solution of system of equations arising in the discretisations of compressible flow problems governed by the steady state Euler or Navier-Stokes equations is considered. The system of PDE is discretised using a finite difference or finite volume method yielding a large sparse system of equations. LÄS MER

3. 12. G-convergence and homogenization for some monotone operators with multiple scales

   Författare :Liselott Flodén; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; G-convergence; homogenization; monotone operators; multiscale convergence; parabolic equations; MATHEMATICS; MATEMATIK;

   Sammanfattning : This thesis deals with questions concerning the convergence of sequences of functions and operators. G-convergence is studied for elliptic and parabolic equations and the necessary investigations of the properties of certain monotone operators are made. LÄS MER

4. 13. G-Convergence and Homogenization of some Monotone Operators

   Författare :Marianne Olsson; Anders Holmbom; Nils Svanstedt; Mårten Gulliksson; Jan Françu; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; G-convergence; homogenization; two-scale convergence; MATHEMATICS; MATEMATIK;

   Sammanfattning : In this thesis we investigate some partial differential equations with respect to G-convergence and homogenization. We study a few monotone parabolic equations that contain periodic oscillations on several scales, and also some linear elliptic and parabolic problems where there are no periodicity assumptions. LÄS MER

5. 14. Svensk och finsk upphinnartillväxt : Faktorpris- och produktivitetsutjämning mellan Finland och Sverige 1950-2000

   Författare :Jonatan Svanlund; Magnus Lindmark; Christer Lundh; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economic history; Sweden; Finland; Convergence; Catch-Up Growth; Productivty; Factor Prices; Wage moderation; Shift-Share analysis; growth accounting; neo-classical growth theory; Economic history; Ekonomisk historia; ekonomisk historia; Economic History;

   Sammanfattning : The aim of this thesis is to gain improved understanding of the income convergence between Finland and Sweden 1950-2000 with a focus on catch-up growth, wage formation, productivity growth, migration and structural change in a setting of structural and institutional differences on the factor markets. Earlier studies of Finnish and Swedish convergence has overlooked the international perspective and therefore missed the general European – US convergence during the period. LÄS MER

7. 15. Convergence analysis of domain decomposition methods : Nonlinear elliptic and linear parabolic equations

   Författare :Emil Engström; Matematik LTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nonoverlapping domain decomposition; Steklov--Poincaré operator; Robin--Robin method; Convergence; Nonlinear elliptic equation; Space-time;

   Sammanfattning : Domain decomposition methods are widely used tools for solving partial differential equations in parallel. However, despite their long history, there is a lack of rigorous convergence theory for equations with non-symmetric differential operators. This includes both nonlinear elliptic equations and linear parabolic equations. LÄS MER