Essays about: "split decomposition"

Found 3 essays containing the words split decomposition.

  1. 1. Speeding up PARAFAC : Approximation of tensor rank using the Tucker core

    University essay from Uppsala universitet/Statistiska institutionen

    Author : Lukas Arnroth; [2018]
    Keywords : Tucker decomposition; PARAFAC; tensor rank; split-half analysis;

    Abstract : In this paper, the approach of utilizing the core tensor from the Tucker decomposition, in place of theuncompressed tensor, for nding a valid tensor rank for the PARAFAC decomposition is considered.Validity of the proposed method is investigated in terms of error and time consumption. READ MORE

  2. 2. Vorticity and Gravitational Wave Perturbations on Cosmological Backgrounds Using the 1+1+2 Covariant Split of Spacetime

    University essay from Umeå universitet/Institutionen för fysik

    Author : Robin Törnkvist; [2018]
    Keywords : ;

    Abstract : In this thesis we consider perturbations of a perfect fluid on locally rotationally symmetrical (LRS) class II cosmological backgrounds, with a nonvanishing vorticity of the fluid on the perturbed model. The method used is based on the 1+1+2 covariant decomposition of spacetime, motivated by the assumption of anisotropic expansion, followed by a harmonic decomposition of all gauge invariant quantities. READ MORE

  3. 3. Methods for phylogenetic analysis

    University essay from Linköpings universitet/Matematiska institutionen

    Author : Kåre Krig; [2010]
    Keywords : phylogenetic trees; tight span; split decomposition;

    Abstract : In phylogenetic analysis one study the relationship between different species. By comparing DNA from two different species it is possible to get a numerical value representing the difference between the species. For a set of species, all pair-wise comparisons result in a dissimilarity matrix d. READ MORE