Sökning: "matrix"

Visar resultat 1 - 5 av 2522 avhandlingar innehållade ordet matrix.

  1. 1. Software tools for matrix canonical computations and web-based software library environments

    Författare :Pedher Johansson; Bo Kågström; Erik. Elmroth; Alan Edelman; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Canonical structure; Jordan canonical form; controllability; StratiGraph; Matlab toolbox; Kronecker canonical form; matrix; matrix pencil; perturbation theory; closure hirerarchy; matrix stratification; control system; observability; Numerical analysis; Numerisk analys;

    Sammanfattning : This dissertation addresses the development and use of novel software tools and environments for the computation and visualization of canonical information as well as stratification hierarchies for matrices and matrix pencils. The simplest standard shape to which a matrix pencil with a given set of eigenvalues can be reduced is called the Kronecker canonical form (KCF). LÄS MER

  2. 2. Matrix composition in Zircaloy

    Författare :Boel Wadman; Chalmers University of Technology; []
    Nyckelord :zircaloy-2; zircaloy-4; corrosion resistance; uniform corrosion; matrix composition; thin oxide layers; atom probe analysis; annealing parameter;

    Sammanfattning : .... LÄS MER

  3. 3. Response Matrix Reloaded : for Monte Carlo Simulations in Reactor Physics

    Författare :Mickus Ignas; Jan Dufek; Jaakko Leppänen; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kärnenergiteknik; Nuclear Engineering;

    Sammanfattning : This thesis investigates Monte Carlo methods applied to criticality and time-dependent problems in reactor physics. Due to their accuracy and flexibility, Monte Carlo methods are considered as a “gold standard” in reactor physics calculations. However, the benefits come at a significant computing cost. LÄS MER

  4. 4. On the Ising problem and some matrix operations

    Författare :Daniel Andrén; Roland Häggkvist; Henrik Eriksson; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Ising problem; phase tansition; matrix multiplicatoin; matrix inversion; Discrete mathematics; Diskret matematik;

    Sammanfattning : The first part of the dissertation concerns the Ising problem proposed to Ernst Ising by his supervisor Wilhelm Lenz in the early 20s. The Ising model, or perhaps more correctly the Lenz-Ising model, tries to capture the behaviour of phase transitions, i.e. how local rules of engagement can produce large scale behaviour. LÄS MER

  5. 5. Towards surgical use of matrix metalloproteinase biology

    Författare :Björn Pasternak; Per Aspenberg; Pentti Tengvall; Yrjö T Konttinen; Linköpings universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Achilles tendon; colon; tetracyclines; tissue inhibitor of metalloproteinases TIMP ; wound healing.; colorectal surgery; extracellular matrix; humans; matrix metalloproteinases MMPs ; rats; surgical anastomosis; sutures; tendon injuries; Orthopaedics; Ortopedi;

    Sammanfattning : Matrix metalloproteinases (MMPs), such as collagenases, are a family of enzymes capable of degrading most constituents of the extracellular matrix. MMPs are thought to be involved in the aetiopathogenesis of tendon rupture. Additionally, failure of healing has in some instances been associated with elevated levels of MMPs. LÄS MER