Sökning: "Ali Dorostkar"

Hittade 2 avhandlingar innehållade orden Ali Dorostkar.

1. 1. Analysis and Implementation of Preconditioners for Prestressed Elasticity Problems : Advances and Enhancements

   Författare :Ali Dorostkar; Maya Neytcheva; Thomas Huckle; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; FEM; Saddle point matrix; Preconditioning; Schur complement; Generalized Locally Toeplitz; Prestressed elasticity; Scientific Computing; Beräkningsvetenskap;

   Sammanfattning : In this work, prestressed elasticity problem as a model of the so-called glacial isostatic adjustment (GIA) process is studied. The model problem is described by a set of partial differential equations (PDE) and discretized with a mixed finite element (FE) formulation. LÄS MER

3. 2. Developments in preconditioned iterative methods with application to glacial isostatic adjustment models

   Författare :Ali Dorostkar; Maya Neytcheva; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Scientific Computing; Beräkningsvetenskap;

   Sammanfattning : This study examines the block lower-triangular preconditioner with element-wise Schur complement as the lower diagonal block applied on matrices arising from an application in geophysics. The element-wise Schur complement is a special approximation of the exact Schur complement that can be constructed in the finite element framework. LÄS MER