Sökning: "Eigenvalue"

Visar resultat 1 - 5 av 51 uppsatser innehållade ordet Eigenvalue.

  1. 1. A numerical investigation of Anderson localization in weakly interacting Bose gases

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Crystal Ugarte; [2020]
    Nyckelord :Applied mathematics; finite elements; eigenvalue solver; eigenvalue problem; Bose-Einstein Codensate; Finita elementmetoden; tillämpad matematik; Bose-Einstein kondensat; egenvärdesalgoritm; egenvärdesproblem;

    Sammanfattning : The ground state of a quantum system is the minimizer of the total energy of that system. The aim of this thesis is to present and numerically solve the Gross-Pitaevskii eigenvalue problem (GPE) as a physical model for the formation of ground states of dilute Bose gases at ultra-low temperatures in a disordered potential. LÄS MER

  2. 2. Enhancing ESG-Risk Modelling - A study of the dependence structure of sustainable investing

    Master-uppsats, KTH/Matematisk statistik; KTH/Matematisk statistik

    Författare :Edvin Berg; Karl Wilhelm Lange; [2020]
    Nyckelord :ESG; Sustainable Investing; Dependency Structure; Correlation; Risk; Random Matrix Theory; Eigenvalue; Eigenvalue Decomposition; Minimum Variance Portfolio; ESG; Hållbar Investering; Beroendestruktur; Korrelation; Stokastisk Matristeori; Egenvärden; Egenvärdes Dekomposition; Minimal Variansportfölj;

    Sammanfattning : The interest in sustainable investing has increased significantly during recent years. Asset managers and institutional investors are urged to invest more sustainable from their stakeholders, reducing their investment universe. LÄS MER

  3. 3. Green Fuel Simulations

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Daniel Gutiérrez; [2020]
    Nyckelord :Industrial gas turbines; Combustion instabilities; Computational fluid dynamics; Acoustics; COMSOL Multiphysics; Flame transfer function;

    Sammanfattning : Many industries have entered a new global phase which takes the environment in mind. The gas turbine industry is no exception, where the utilization of green fuels is the future to spare the environment from carbon dioxide and NOx emissions. LÄS MER

  4. 4. Computation of Eigenmodes in Three-Dimensional Structures

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI); KTH/Skolan för teknikvetenskap (SCI)

    Författare :Daniel Lilja; Olof Hummelgren; [2020]
    Nyckelord :;

    Sammanfattning : In this thesis the eigenmodes and eigenvalues of three dimensional structures are analyzed using the Python environment FEniCS in combination with an implementation of the Arnoldi method in MATLAB for calculation of eigenpairs. This is done by considering separable solutions of the wave equation and subsequently expressing these as the solutions to an eigenvalue problem. LÄS MER

  5. 5. Seismic evaluation and retrofitting of an existing building in Athens using pushover analysis

    Master-uppsats, KTH/Betongbyggnad

    Författare :Angelos Lazaris; [2019]
    Nyckelord :Earthquakes; seismic analysis; retrofitting; pushover analysis; concrete building; steel bracing; fibre reinforced plastic;

    Sammanfattning : Earthquakes are one of the biggest problems in civil engineering all over the world. Due to earthquakes, great disasters in cities with collapsed structures and human losses have been caused. LÄS MER