Sökning: "wavelets"

Visar resultat 21 - 25 av 42 avhandlingar innehållade ordet wavelets.

  1. 21. Wavelet Galerkin methods for elastic multibody systems with unilateral contact constraints

    Författare :José Díaz López; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer science; Elastic MBS; Contact; Unilateral Contraints; Wavelet; DAE; Daubechies; numerical analysis; systems; control; Datalogi; numerisk analys; system; kontroll;

    Sammanfattning : In this thesis we investigate the applicability of wavelets to simulate the time behavior of elastic multibody systems (MBS) with contact constraints. For this end, a wavelet element method (WEM) was implemented, exploiting the special structure of the coupled ODE/PDE equations that govern elastic MBS. LÄS MER

  3. 22. Orthogonal Polynomials, Operators and Commutation Relations

    Författare :John Musonda; Sergei Silvestrov; Sten Kaijser; Anatoliy Malyarenko; Natan Kruglyak; Irina Asekritova; Viktor Abramov; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics Applied Mathematics; matematik tillämpad matematik;

    Sammanfattning : Orthogonal polynomials, operators and commutation relations appear in many areas of mathematics, physics and engineering where they play a vital role. For instance, orthogonal functions in general are central to the development of Fourier series and wavelets which are essential to signal processing. LÄS MER

  4. 23. Sensors, signals and systems for electromagnetic radiation experiments in physics

    Författare :Maxim Minerskjöld; KTH; []
    Nyckelord :;

    Sammanfattning : I discuss in this thesis new instrumentation, measurements, and techniques that 1 have worked on that could benefit different stages of the process of detecting electromagnetic radiation and charge particles. The thesis describes a complete generic detector system, from the initial detection stage through the data analysis stage, and where in each stage my work was involved. LÄS MER

  5. 24. Wavelet theory and some of its applications

    Författare :Elin Johansson; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Sammanfattning : This thesis deals with applied mathematics with wavelets as a joint subject. There is an introduction and two extensive papers, of which one is already published in an international journal. LÄS MER

  7. 25. Essays in Empirical Finance: Volatility, Interdependencies, and Risk in Emerging Markets

    Författare :Anders C Johansson; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Emerging markets; Asia; China; Stock markets; Bond markets; Exchange rates; Causality; Cointegration; Multivariate GARCH; Dynamic correlation; Timescales; Wavelet analysis; Heterogeneous markets; Multivariate stochastic volatility; Markov chain Monte Carlo; Country risk; Conditional beta;

    Sammanfattning : The four essays in this thesis deal with emerging markets and their empirical characteristics. They mainly explore the relationship among different markets and the thesis cover several asset classes, including stocks, bonds, and exchange rates. LÄS MER