Essays about: "feluppskattningar"

Found 5 essays containing the word feluppskattningar.

  1. 1. Discrepancy of sequences and error estimates for the quasi-Monte Carlo method

    University essay from Karlstads universitet

    Author : Niklas Vesterinen; [2020]
    Keywords : discrepancy; low discrepancy sequences; van der Corput; quasi-Monte Carlo; Koksma inequality; error estimates; diskrepans; lågdiskrepanstalföljder; van der Corput; kvasi-Monte Carlo; Koksmas olikhet; feluppskattningar;

    Abstract : We present the notions of uniform distribution and discrepancy of sequences contained in the unit interval, as well as an important application of discrepancy in numerical integration by way of the quasi-Monte Carlo method. Some fundamental (and other interesting) results with regards to these notions are presented, along with some detalied and instructive examples and comparisons (some of which not often provided by the literature). READ MORE

  3. 2. Approximating extrema of quadratic forms using Krylov subspaces

    University essay from Lunds universitet/Matematik LTH

    Author : Simon Hallborn; [2017]
    Keywords : Approximations; Quadratic forms; Krylov subspaces; Eigenvalue problems; Norms; Logarithmic norms; Mathematics and Statistics;

    Abstract : In this thesis approximations to quadratic forms using Krylov subspaces are presented. These quantities are approximations of the norm and logarithmic norm of a matrix. In order to find these quantities an eigenvalue problem has to be solved, but because of limited storage and time, this is not feasible in practice with large matrices. READ MORE

  4. 3. An Adaptive Surface Finite Element Method for the Laplace-Beltrami Equation

    University essay from KTH/Numerisk analys, NA

    Author : Gökce Tuba Masur; [2017]
    Keywords : ;

    Abstract : In this thesis, we present an adaptive surface finite element method for the Laplace-Beltrami equation. The equation is known as the manifold equivalent of the Laplace equation. READ MORE

  5. 4. Error estimates for finite element approximations of effective elastic properties of periodic structures

    University essay from Uppsala universitet/Avdelningen för teknisk databehandling

    Author : Klas Pettersson; [2010]
    Keywords : error estimation; finite elements;

    Abstract : Techniques for a posteriori error estimation for finite element approximations of an elliptic partial differential equation are studied.This extends previous work on localized error control in finite element methods for linear elasticity.The methods are then applied to the problem of homogenization of periodic structures. READ MORE

  6. 5. Lake Evaporation Estimation by Isotope, Energy Balance and Bulk Aerodynamic Methods

    University essay from Uppsala universitet/Institutionen för geovetenskap

    Author : Christian Jaedicke; [1997]
    Keywords : ;

    Abstract : Lake evaporation from a shallow lake in central Sweden has been estimated using three independent methods from measurements during summer 1995. The applied isotope method is a combination of the water and isotope mass balance. Its main feature is that inflows need not to be measured. Only knowledge of their isotopic content is sufficient. READ MORE