Search for dissertations about: "least squares optimization"

Showing result 1 - 5 of 49 swedish dissertations containing the words least squares optimization.

  2. 1. Algorithms for overdetermined systems of equations

    Author : Mårten Gulliksson; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; least squares; weights; lp; approximation; optimization;

    Abstract : .... READ MORE

  4. 2. Topics in Sparse Least Squares Problems

    Author : Mikael Adlers; Michael A. Saunders; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis addresses topics in sparse least squares computation. A stable method for solving the least squares problem, min ||Ax-b||2 is based on the QR factorization.Here we have addressed the difficulty for storing the orthogonal matrix Q. READ MORE

  5. 3. Algorithms for the Weighted Orthogonal Procrustes Problem and other Least Squares Problems

    Author : Thomas Viklands; Per-Åke Wedin; Lars Eldén; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Procrustes; weighted; orthogonal; algorithms; global optimization.; Numerical analysis; Numerisk analys;

    Abstract : In this thesis, we present algorithms for local and global minimization of some Procrustes type problems. Typically, these problems are about rotating and scaling a known set of data to fit another set with applications related to determination of rigid body movements, factor analysis and multidimensional scaling. READ MORE

  6. 4. System Identification with Multi-Step Least-Squares Methods

    Author : Miguel Galrinho; Håkan Hjalmarsson; Manfred Deistler; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Abstract : The purpose of system identification is to build mathematical models for dynam-ical systems from experimental data. With the current increase in complexity of engineering systems, an important challenge is to develop accurate and computa-tionally simple algorithms, which can be applied in a large variety of settings. READ MORE

  7. 5. Numerical Algorithms for Optimization Problems in Genetical Analysis

    Author : Kateryna Mishchenko; Sverker Holmgren; Dmitrii Silvestrov; Lars Rönnegård; Ann-Charlotte Berglund Sonnhammer; Mälardalens högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantitative Trait Loci QTL ; restricted maximum likelihood REML ; variance components; average information AI matrix; Local optimization; Quasi-Newton method; Active Set method; Hessian approximation; BFGS update; Applied mathematics; Tillämpad matematik; Matematik tillämpad matematik;

    Abstract : The focus of this thesis is on numerical algorithms for efficient solution of QTL analysis problem in genetics.Firstly, we consider QTL mapping problems where a standard least-squares model is used for computing the model fit. READ MORE