Sökning: "Euler equation"

Visar resultat 1 - 5 av 50 avhandlingar innehållade orden Euler equation.

  1. 1. Group theoretical methods for solving multidimensional nonlinear partial differential equations

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Marianna Euler; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Sammanfattning : New methods for constructing both exact and approximate solutions of multidimensional nonlinear partial differential equations are developed. The basis of the methods is taken from the classical Lie transformation group theory. LÄS MER

  2. 2. On Numerical Methods for the Diffusion Equation Subject to Non-Local Boundary Conditions

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Gunnar Ekolin; Göteborgs universitet.; Gothenburg University.; [1992]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; forward Euler method; backward Euler method; the Crank-Nicolson method; heat equation; Galerkin finite element methods; backward Euler method; heat equation; the Crank-Nicolson method; Galerkin finite element methods;

    Sammanfattning : In the first paper three different finite difference methods for solving the heat equation in one space dimension with boundary conditions containing integrals over the interior of the interval are considered. The schemes are based on the forward Euler, the backward Euler and the Crank-Nicolson methods. Error estimates are derived in maximum norm. LÄS MER

  3. 3. Finite element approximation of the linear stochastic Cahn-Hilliard equation

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Ali Mesforush; Göteborgs universitet.; Gothenburg University.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cahn-Hilliard-Cook equation; finite element method; backward Euler method; error estimate; strong convergence; backward Euler method; error estimate; finite element method; strong convergence;

    Sammanfattning : The linearized Cahn-Hilliard-Cook equation is discretized in the spatial variables by a standard finite element method. Strong convergence estimates are proved under suitable assumptions on the covariance operator of the Wiener process, which is driving the equation. The backward Euler time stepping is also studied. LÄS MER

  4. 4. Data Assimilation in Fluid Dynamics using Adjoint Optimization

    Detta är en avhandling från Matematiska institutionen

    Författare :Johan Lundvall; Vladimir Kozlov; Per Weinerfelt; Matts Karlsson; Anders Szepessy; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Data assimilation; Inverse problem; Adjoint optimization; Burgers equation; nonlinear; Landweber; Initial pressure; Euler flow; MATHEMATICS Applied mathematics; MATEMATIK Tillämpad matematik;

    Sammanfattning : Data assimilation arises in a vast array of different topics: traditionally in meteorological and oceanographic modelling, wind tunnel or water tunnel experiments and recently from biomedical engineering. Data assimilation is a process for combine measured or observed data with a mathematical model, to obtain estimates of the expected data. LÄS MER

  5. 5. Essays on Consumption - Aggregation, Asymmetry and Asset Distributions

    Detta är en avhandling från Växjö : Växjö University Press

    Författare :Mårten Bjellerup; Jan Ekberg; Katarina Juselius; [2005]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Aggregate consumption; Aggregation; Asymmetry; Wealth distribution; Income distribution; Concavity; Permanent Income Hypothesis; Buffer stock saving; Precautionary saving; consumption; saving; Euler equation; error correction; skew-t distribution; gamma distribution; dispersion; non-linear model; durable goods; nondurable goods; household level data; consumption function; marginal propensity to consume; current resources; consumption expenditure; life-cycle model; univariate test; multivariate test; Sweden; SOCIAL SCIENCES Business and economics Economics; SAMHÄLLSVETENSKAP Ekonomi Nationalekonomi; Economics; Nationalekonomi;

    Sammanfattning : The dissertation consists of four self-contained essays on consumption. Essays 1 and 2 consider different measures of aggregate consumption, and Essays 3 and 4 consider how the distributions of income and wealth affect consumption from a macro and micro perspective, respectively. LÄS MER