Sökning: "Lukas Arnroth"

Hittade 2 uppsatser innehållade orden Lukas Arnroth.

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

    Master-uppsats, Uppsala universitet/Statistiska institutionen

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

    Sammanfattning : 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. LÄS MER

  3. 2. Supervised Learning Techniques : A comparison of the Random Forest and the Support Vector Machine

    Kandidat-uppsats, Uppsala universitet/Statistiska institutionen

    Författare :Lukas Arnroth; Jonni Fiddler Dennis; [2016]
    Nyckelord :machine learning; biomarkers; cross-validation; receiver operating characteristic; k-means clustering; feature selection; binary classification;

    Sammanfattning : This thesis examines the performance of the support vector machine and the random forest models in the context of binary classification. The two techniques are compared and the outstanding one is used to construct a final parsimonious model. The data set consists of 33 observations and 89 biomarkers as features with no known dependent variable. LÄS MER