Sökning: "Extreme values"

Visar resultat 16 - 20 av 100 avhandlingar innehållade orden Extreme values.

  1. 16. Change point detection with respect to variance

    Författare :Elias Erdtman; Martin Singull; Dietrich von Rosen; Nader Tajvidi; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis examines a simple method for detecting a change with respect to the variance in a sequence of independent normally distributed observations with a constant mean. The method filters out observations with extreme values and divides the sequence into equally large subsequences. LÄS MER

  3. 17. On Degree Variance in Random Graphs

    Författare :Jan Hagberg; Ove Frank; Tom A.B. Snijders; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Degree Sequences; Uniform Random Graphs; Bernoulli Graphs; Degree Moments; Degree Statistics; Degree Variance; Gamma Approximation; Centrality Testing; Integer Sequences; Statistics; Statistik;

    Sammanfattning : This thesis is concerned with degree moments and degree variance in random graphs. The degree of vertex i in a graph is the number of edges incident to vertex i.In the first paper, degree moments and functions of degree moments are investigated for three random graph models. LÄS MER

  4. 18. Estimating inclusion content in high performance steels

    Författare :Jens Ekengren; Jens Bergström; Christer Burman; Hans Nordberg; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Engineering; Materialteknik;

    Sammanfattning : Non-metallic inclusions in steel pose a major problem for the fatigue resistance, especially regarding fatigue at very long lives corresponding to low cyclic stress levels, as well as being detrimental to material toughness and polishability.The largest inclusions are quite rare, which makes conventional detection methods timeconsuming if reliable results are to be obtained. LÄS MER

  5. 19. Estimation of Nonlinear Latent Variable and Mixture Models

    Författare :Johan Vegelius; Shaobo Jin; Fan Yang-Wallentin; Melanie Wall; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; structural equation modeling; semiparametric; EM algorithm; adaptive Gauss-Hermite quadrature approximation; Laplace approximation; zero inflation; Statistics; Statistik;

    Sammanfattning : In this thesis methods are developed for estimation of latent variable models. In particular nonlinear structural equation models are estimated in the presence of ordinal data and mixture models for count data. LÄS MER

  7. 20. Head Movement Correlates to Focus Assignment in Swedish

    Författare :Sonia Sangari; Bertil Lydberg; Lars Ahrenberg; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Speech communication normally involves not only speech but also face and head movements. In the present investigation, the correlation between head movement and focus assignment is studied, both in the laboratory and in spontaneous speech, with the aim of finding out what these head movements look like in detail. LÄS MER