Sökning: "Problem formulation"

Visar resultat 11 - 15 av 409 avhandlingar innehållade orden Problem formulation.

1. 11. Shape Optimization for Electromagnetic and Quasimagnetostatic Applications

   Författare :Per Jacobsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shape optimization; continuum sensitivity; electromagnetic scattering; adjoint problem;

   Sammanfattning : This thesis uses a continuum formulation of sensitivity for shape optimization in two-dimensional microwave scattering and quasimagnetostatic problems. The continuum sensitivity is obtained by solving an appropriate adjoint problem. LÄS MER

3. 12. Torken : tvångsvården av alkoholmissbrukare i Sverige 1940-1981

   Författare :Johan Edman; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; alcoholic care institutions; compulsory care; gender; implementation; problem definitions; recommodification; social criticism; social problems; treatment of alcoholics; History subjects; Historieämnen;

   Sammanfattning : This dissertation investigates compulsory care of alcohol abusers in Sweden during the years 1940 to 1981. The purposes of the dissertation are twofold: in part to determine the concrete forms which care services for alcohol abusers took during the years focused on, in part to analyze what connections existed between the development of services and conceptions of the reasons for, consequences of and possible solutions to alcohol abuse. LÄS MER

4. 13. Adaptive Finite Element Methods for the Reynolds Thin Film Model with Cavitation

   Författare :Bertil Nilsson; Sweden Gothenburg Chalmers University of Technology Department of Applied Mechanics; []
   Nyckelord :tribology; Reynolds equation; cavitation; FEM; adaptivity; variational inequality; penalty formulation; error estimation; residual; duality;

   Sammanfattning : The main purpose of this thesis is to use modern goal-oriented adaptive finite element techniques in order to improve the numerical simulation of tribology. Two novel adaptive finite element methods for the Reynolds thin film model including cavitation are presented and their different strategies are compared. LÄS MER

5. 14. Adaptive variational multiscale methods

   Författare :Axel Målqvist; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; finite element method; Galerkin; duality; a posteriori error estimation; adaptivity; variational multiscale method; mixed formulation; multi-physics; oil reservoir simulation; finite element method;

   Sammanfattning : In this thesis we present a new adaptive multiscale method for solving elliptic partial differential equations. The method is based on numerical solution of decoupled local fine scale problems on patches. LÄS MER

7. 15. Finite element procedures for virtual tribology

   Författare :Bertil Nilsson; Göteborgs universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Tribology; Reynolds equation; Stokes equation; cavitation; FEM; adaptivity; variational inequality; penalty formulation; error estima- tion; residual; duality.;

   Sammanfattning : The main purpose of this thesis is to use modern goal-oriented adap- tive finite element techniques in order to improve the numerical simulation of tribology. Two novel adaptive finite element methods for the Reynolds thin film model, and Stokes model including cavitation are presented and their different strategies are compared. LÄS MER