Sökning: "equations"

Visar resultat 11 - 15 av 1692 avhandlingar innehållade ordet equations.

  1. 11. Dynamic higher order equations for structural elements

    Författare :Hossein Abadikhah; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Eigenfrequency; Micropolar; Series expansion; Beam; Plate equations; Torsion;

    Sammanfattning : The subject of this thesis is to derive and evaluate governing equations and corresponding boundary conditions for solid isotropic cylinders and isotropic micropolar rectangular plates. This is achieved by a systematic power series expansion approach, by either adopting a generalized Hamilton's principle or a direct approach. LÄS MER

  3. 12. Initial-Boundary-Value Problems for the Stokes and Navier–Stokes Equations on Staggered Grids

    Författare :Jonas Nilsson; Bertil Gustafsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Stokes equations; Navier-Stokes equations; boundary conditions; staggered grids; higher-order methods; Numerical Analysis; Numerisk analys;

    Sammanfattning : In the first part of the thesis various types of boundary conditions for the steady state Stokes equations are considered. We formulate the boundary conditions in a new way, such that the boundary value problem becomes non-singular, and derive estimates of the solution. LÄS MER

  4. 13. Dynamical Properties of Quasi-periodic Schrödinger Equations

    Författare :Kristian Bjerklöv; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Schrödinger equations; Schrödinger operators; positive Lyapunov exponents; invariant measures; minimality; measure of spectrum; MATHEMATICS; MATEMATIK;

    Sammanfattning : .... LÄS MER

  5. 14. Teaching systems of linear equations in Sweden and China: What is made possible to learn?

    Författare :Johan Häggström; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; mathematics education; school algebra; systems of equations; simultaneous equations; variation theory; international comparison; mathematics teaching;

    Sammanfattning : .... LÄS MER

  7. 15. Stable FEM-FDTD Hybrid Method for Maxwell's Equations

    Författare :Thomas Rylander; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite Element Method; scattering; antennas; stability analysis; edge elements; Maxwell s equations; NASA almond; microwave circuits; mass lumping; proof of stability; explicit-implicit time-stepping; Finite-Differences Time-Domain;

    Sammanfattning : In this thesis edge elements are applied to solve several problems in computational electromagnetics. In particular, a hybrid scheme joining the Finite Element Method (FEM) and the Finite-Difference Time-Domain (FDTD) algorithm is developed, tested and exploited. LÄS MER