Sökning: "model reduction"

Visar resultat 1 - 5 av 1420 avhandlingar innehållade orden model reduction.

  1. 1. Model Order Reduction Based on Semidefinite Programming

    Detta är en avhandling från Department of Automatic Control, Lund Institute of Technology, Lund University

    Författare :Aivar Sootla; Lunds universitet.; Lund University.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; model reduction; parameterized model reduction; nu-gap metric; semidefinite programming; frequency response matching.;

    Sammanfattning : The main topic of this PhD thesis is complexity reduction of linear time-invariant models. The complexity in such systems is measured by the number of differential equations forming the dynamical system. This number is called the order of the system. LÄS MER

  2. 2. Model Reduction Using Semidefinite Programming

    Detta är en avhandling från Department of Automatic Control, Lund Institute of Technology, Lund University

    Författare :Aivar Sootla; Lunds universitet.; Lund University.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semidefinite programming; model reduction; convex optimization;

    Sammanfattning : In this thesis model reduction methods for linear time invariant systems are investigated. The reduced models are computed using semidefinite programming. Two ways of imposing the stability constraint are considered. However, both approaches add a positivity constraint to the program. LÄS MER

  3. 3. Krylov Subspace Methods for Linear Systems, Eigenvalues and Model Order Reduction

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Daniel Skoogh; Göteborgs universitet.; Gothenburg University.; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; eigenvalues; eigenvectors; sparse; parallel; rational; Krylov; shift; invert; Arnoldi; linear systems; iterative; model; reduction; passive; 65F15; 65F50; 65Y05; 65F10; 93A30; 93B40;

    Sammanfattning : New variants of Krylov subspace methods for numerical solution of linear systems, eigenvalue, and model order reduction problems are described. A new method to solve linear systems of equations with several right-hand sides is described. LÄS MER

  4. 4. Nonlinear Modeling of FETs for Microwave Switches and Amplifiers

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Ankur Prasad; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HEMT; symmetry; small-signal model; field-plate.; GaAs; GaN; nonlinear model; trap model; symmetrical model; trap; model;

    Sammanfattning : The exponential growth in wireless systems require rapid prototyping of radio frequency circuits (RF) using computer-aided design (CAD) enabled models. Most of the RF circuits (e.g. switches, amplifiers, mixers, etc. LÄS MER

  5. 5. Model Adaptivity in Elasticity

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :David Heintz; Göteborgs universitet.; Gothenburg University.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite element method; dimension reduction; a posteriori error; model error; model adaptivity;

    Sammanfattning : We consider model adaptivity in elasticity for dimensionally reduced forms, and shall treat different conceptual approaches. The basic idea, however, is to adaptively refine, not only the computational mesh, but also the underlying mathematical formulation. LÄS MER