Sökning: "Eigenvalue"

Visar resultat 6 - 10 av 72 uppsatser innehållade ordet Eigenvalue.

  1. 6. Approximating Quasistationary Distributions Using Deep Learning

    Master-uppsats, KTH/Matematisk statistik

    Författare :Björn Wehlin; [2022]
    Nyckelord :Applied Mathematics; Deep Learning; Probability Theory; Stochastic Processes; Ito Diffusions; Quasistationary Distributions; Tillämpad matematik; djupinlärning; sannolikhetsteori; stokastiska processer; Ito-diffusioner; kvasistationära fördelningar;

    Sammanfattning : We study a class of It\={o} diffusion processes on domains with smooth boundary, at which the process is killed. Such a process, when conditioned on non-extinction, gives rise to a stationary state known as a \emph{quasistationary distribution} (QSD). LÄS MER

  3. 7. Extrapolation of polynomial nets and their generalization guarantees

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

    Författare :Yongtao Wu; [2022]
    Nyckelord :Polynomial neural networks; Neural tangent kernel; Extrapolation; Polynomial neural networks; Neural tangent kernel; Extrapolation;

    Sammanfattning : Polynomial neural networks (NNs-Hp) have recently demonstrated high expressivity and efficiency across several tasks. However, a theoretical explanation toward such success is still unclear, especially when compared to the classical neural networks. LÄS MER

  4. 8. Exploring and extending eigensolvers for Toeplitz(-like) matrices : A study of numerical eigenvalue and eigenvector computations combined with matrix-less methods

    Kandidat-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Martin Knebel; Fredrik Cers; Oliver Groth; [2022]
    Nyckelord :Toeplitz matrices; eigenvalue computation; eigenvector computation; matrix-less methods;

    Sammanfattning : We implement an eigenvalue solving algorithm proposed by Ng and Trench, specialized for Toeplitz(-like) matrices, utilizing root finding in conjunction with an iteratively calculated version of the characteristic polynomial. The solver also yields corresponding eigenvectors as a free bi-product. LÄS MER

  5. 9. Analysis, Implementation and Evaluation of Direction Finding Algorithms using GPU Computing

    Master-uppsats, Linköpings universitet/Institutionen för datavetenskap

    Författare :Regina Andersdotter; [2022]
    Nyckelord :GPU; GPU Computing; Direction Finding; GPU Suitability; CUDA; Multiple Signal Classification; Weighted Subspace Fitting; Correlative Interferometer; runtime; angle resolution; block size;

    Sammanfattning : Direction Finding (DF) algorithms are used by the Swedish Defence Research Agency (FOI) in the context of electronic warfare against radio. Parallelizing these algorithms using a Graphics Processing Unit (GPU) might improve performance, and thereby increase military support capabilities. LÄS MER

  7. 10. Rotor Dynamic Modeling of Hydropower Rotors by 3D-Finite Element Analysis

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

    Författare :Simon Pääjärvi; [2022]
    Nyckelord :Rotordynamics; Applied Mechanics; Dynamics; Rotor; Finite Element Analysis; Hydropower; Solid Mechanics; Energy Production;

    Sammanfattning : By using the rotor dynamic capabilities of Simcenter Nastran Rotordynamics, an eigenvalue analysis of 3D-finite element models of the Jeffcott rotor and the overhung rotor were conducted and compared to the results with beam-based, lumped parameter models. The first two critical speeds of the Jeffcott rotor were estimated with variations of 3. LÄS MER