Sökning: "pseudo-likelihood"

Hittade 3 uppsatser innehållade ordet pseudo-likelihood.

  1. 1. Reconstruction of Fire Spread with a Markov Random Field Mixture Model

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Marcus Gehrmann; [2023]
    Nyckelord :Forest fire; fire scars; spatial statistics; Markov random field; EM-algorithm; pseudo-likelihood; Mathematics and Statistics;

    Sammanfattning : This thesis revolves around reconstructing fire sizes for historical fires in Jämtgaveln, Sweden based on data of fire scars in trees. We propose a Hidden Markov Model (HMM), where the domain is divided into quadratic grid cells of 250 $\times$ 250 m and with these grid cells we associate a binary Markov random field taking values 0 or 1 corresponding to no fire and fire respectively. LÄS MER

  2. 2. Optimal Auxiliary Variable Assisted Two-Phase Sampling Designs.

    Master-uppsats, Göteborgs universitet/Institutionen för matematiska vetenskaper

    Författare :Henrik Imberg; [2016-06-22]
    Nyckelord :Anticipated variance; Auxiliary information in design; Maximum pseudolikelihood; Optimal designs; Poisson sampling; Two-phase sampling;

    Sammanfattning : Two-phase sampling is a procedure in which sampling and data collection is conducted in two phases, aiming at achieving increased precision in estimation at reduced cost. The rst phase typically involves sampling a large number of elements and collecting data on variables that are easy to measure. LÄS MER

  3. 3. Detecting contacts in protein folds by solving the inverse Potts problem - a pseudolikelihood approach

    Magister-uppsats, KTH/Matematisk statistik

    Författare :Magnus Ekeberg; [2012]
    Nyckelord :;

    Sammanfattning : Abstract  Spatially proximate amino acid positions in a protein tend to co-evolve, so a protein's 3D-structure leaves an echo of correlations in the evolutionary record. Reverse engineering 3D-structures from such correlations is an open problem in structural biology, pursued with increasing vigor as new protein sequences continue to fill the data banks. LÄS MER