Sökning: "Hyperbolic"

Visar resultat 21 - 25 av 115 avhandlingar innehållade ordet Hyperbolic.

  1. 21. Contributions to Numerical Solution of Stochastic Differential Equations

    Författare :Anders Muszta; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; adaptive method; change of time; CIR model; CKLS model; convergence order; Euler method; heavy-tailed SDE; hyperbolic SDE; geometric integration; global Lipschitz condition; Levy process; Lie group method; local Lipschitz condition; local martingales; mean reversion; Milstein method; numerical method; semimartingale; stochastic differential equation; stochastic Taylor expansion; strong approximation; symplectic integration; volatility induced stationarity; waveform relaxation; volatility induced stationarity;

    Sammanfattning : This thesis consists of four papers: Paper I is an overview of recent techniques in strong numerical solutions of stochastic differential equations, driven by Wiener processes, that have appeared the last then 10 years, or so. Paper II studies theoretical and numerical aspects of stochastic differential equations with so called volatility induced stationarity. LÄS MER

  3. 22. Uncertainty Quantification and Numerical Methods for Conservation Laws

    Författare :Per Pettersson; Jan Nordström; Gianluca Iaccarino; Gunilla Kreiss; Rémi Abgrall; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; uncertainty quantification; polynomial chaos; stochastic Galerkin methods; conservation laws; hyperbolic problems; finite difference methods; finite volume methods; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Sammanfattning : Conservation laws with uncertain initial and boundary conditions are approximated using a generalized polynomial chaos expansion approach where the solution is represented as a generalized Fourier series of stochastic basis functions, e.g. orthogonal polynomials or wavelets. LÄS MER

  4. 23. Microeconomic Policy for Development: Essays on Trade and Environment, Poverty and Education

    Författare :Miguel Quiroga; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; absenteeism; aggregation bias; comparative advantage; decomposition analysis; education; environmental endowment; environmental regulation; factor content; geography; hyperbolic discounting; living standards; mandatory attendance; non-homothetic preferences; pollution haven; Porter hypothesis; poverty; present-biased preferences; teaching; time-inconsistent preferences; trade;

    Sammanfattning : Abstracts This thesis contains three papers analyzing different issues. Paper 1: “Do Countries with Lax Environmental Regulations Have a Comparative Advantage in Polluting Industries?” We study whether lax environmental regulations induce comparative advantages, causing the least-regulated countries to specialize in polluting industries. LÄS MER

  5. 24. The Number of unbounded Components in the Poisson-Boolean Model in H2

    Författare :Johan Tykesson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bernoulli percolation; Continuum percolation; Dependent percolation; Double phase transition; Hyperbolic disc; Poisson-Boolcan model; Poisson-Boolcan model;

    Sammanfattning : .... LÄS MER

  7. 25. Finite Volume Methods on Quadrilateral and Moving Meshes

    Författare :Fredrik Svensson; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; numerisk analys; system; kontroll; systems; control; numerical analysis; finite volume method; Datalogi; Computer science; moving mesh method; higher order reconstruction; hyperbolic conservation law;

    Sammanfattning : The topic of this thesis is the study of finite volume methods for hyperbolic conservation laws on non-uniform meshes. A high-order hyperbolic reconstruction method is presented. The method is constructed for quadrilateral meshes, since more realistic hyperbolic problems involve more complicated problem domains than the standard rectangular ones. LÄS MER