Sökning: "Egenvärden"

Visar resultat 1 - 5 av 22 uppsatser innehållade ordet Egenvärden.

  1. 1. Simulations of a self-stabilizing fully submerged hydrofoil

    Master-uppsats, KTH/Matematik (Avd.)

    Författare :Henry Jacobson; [2023]
    Nyckelord :Hydrofoil; Self-Stabilizing; Lifting Line Theory; Fluid Mechanics; Numerical Methods; Backward Differentiation Formula; Fully Submerged Hydrofoil; Bärplan; bärplansbåt; självstabiliserande; lyftande linjeteori; strömningsme- kanik; numeriska metoder; Backward Differentiation Formula; fullt nedsänkt bärplan;

    Sammanfattning : Two models of a self-stabilizing hydrofoil system is developed where the effects from the struts and hydrofoil give torques for angular rotations. Lifting line theory for the hydrofoil which can twist is used. Nonlinear versions of the models are also developed and compared to find that the linear models use valid approximations. LÄS MER

  3. 2. Fibonaccitalen och matristeori : Fibonacci Numbers and Matrix Theory

    Kandidat-uppsats, Uppsala universitet/Matematiska institutionen

    Författare :Haya Hendi; [2022]
    Nyckelord :talföljd; determinanter; egenvärden; egenvektorer; inverser; minimerande och maximerande matriser; absolut dominanta vektorer;

    Sammanfattning : Syftet med denna uppsats är att studera kopplingar mellan Fibonaccitalen och matristeori. Det matematiska innehållet utgår till största delen från artikeln A contribution to the connections between Fibonacci numbers and matrix theory, skriven av Miriam Farber och Abraham Berman. LÄS MER

  4. 3. Relating the Arnoldi approximation to the best Chebyshev approximation of the characteristic polynomial - A study using a complex valued variant of the Remez algorithm

    Kandidat-uppsats, Lunds universitet/Matematik (naturvetenskapliga fakulteten); Lunds universitet/Matematikcentrum

    Författare :Thomas Renström; [2022]
    Nyckelord :Chebyshev; Arnoldi; Remez; Tang; approximation; matrix; complex; characteristic polynomial; Mathematics and Statistics;

    Sammanfattning : The Remez algorithm is a beautiful algorithm that finds the best approximation to a function by finding points satisfying the alternation condition. In 1987 Ping Tang published his doctoral thesis detailing a version of the Remez algorithm modified for functions of complex values with complex coefficients. LÄS MER

  5. 4. Predicting eigenvalues and eigenmodes in non-rectangular rooms with machine learning techniques

    Master-uppsats, KTH/Teknisk akustik

    Författare :Oscar Lundin; [2022]
    Nyckelord :Machine learning; Finite elements; Plane wave decomposition; ResNet; Room acoustics; Tensorflow; Keras; Eigenfrequency prediction; Maskininlärning; Finita elementmetoden; Planvåguppdelning decomposition; Rumsakustik; ResNet; Tensorflow; Keras; Prediktering av egenvärden; Egenfrekvenser; Egenmoder.;

    Sammanfattning : Knowing the eigenfrequencies and eigenmodes is of great importance to interior design and a common acoustic engineering problem. Challenges in noise control makes knowing the lower eigenfrequencies particularly important. LÄS MER

  7. 5. A Trust-Region Method for Multiple Shooting Optimal Control

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Shaohui Yang; [2022]
    Nyckelord :Trust Region Method; Optimal Control; Model Predictive Control; Sequential Quadratic Programming; Quadratic Programming; Inde_nte Hessian; Mobile Robots; Trust Region Method; Optimal Control; Model Predictive Control; Sekventiell kvadratisk programmering; kvadratisk programmering; obestämd hessian; mobila robotar;

    Sammanfattning : In recent years, mobile robots have gained tremendous attention from the entire society: the industry is aiming at selling more intelligent products while the academia is improving their performance from all perspectives. Real world examples include autnomous driving vehicles, multirotors, legged robots, etc. LÄS MER