Sökning: "Directional statistics"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Directional statistics.

  1. 1. Bayesian Modeling of Directional Data with Acoustic and Other Applications

    Författare :Jalil Taghia; Arne Leijon; W. Bastiaan Kleijn; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Directional statistics; directional distributions; axial distributions; von Mises-Fisher distribution; complex Watson distribution; complex Bingham distribution; Bayesian inference; probabilistic modeling; variational inference; two-dimensional hidden Markov models; Markov chain; blind source separation; frequency domain BSS; underdetermined BSS; online BSS; Bayesian recursive; gene expression data; gene-microarray data; line spectral frequency; speaker identification. ii;

    Sammanfattning : A direction is defined here as a multi-dimensional unit vector. Such unitvectors form directional data. Closely related to directional data are axialdata for which each direction is equivalent to the opposite direction.Directional data and axial data arise in various fields of science. LÄS MER

  3. 2. Random networks with weights and directions, and epidemics thereon

    Författare :Kristoffer Spricer; Tom Britton; Pieter Trapman; Istvan Kiss; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Epidemics; Reproduction number; Final size; Large outbreak; Weighted network; Undirected; Partially directed; Configuration model; Copula; Mathematical Statistics; matematisk statistik;

    Sammanfattning : Networks, consisting of nodes and of edges, can be used to model numerous phenomena, e.g, web pages linking to each other or interactions between people in a population. LÄS MER

  4. 3. Suggestions how to analyse highly episodic repeated measurements

    Författare :Catrin Bergqvist; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; episodic data; growth hormone; bootstrap simulation; directional data analysis; harmonic regression; isotonic regression; harmonic regression;

    Sammanfattning : .... LÄS MER

  5. 4. Finite Element Modeling of the Human Head

    Författare :Svein Kleiven; KTH; []
    Nyckelord :Finite element method FEM ; Human head; brain; head injury; epidemiology; statistics; simulations.;

    Sammanfattning : The main objectives of the present thesis were to define the dimension of head injuries in Sweden over a longer period and to present a Finite Element (FE) model of the human head which can be used for preventive strategies in the future. The annual incidence of head injuries in Sweden between 1987 and 2000 was defined at over 22 000, cases most of which were mild head injuries. LÄS MER

  7. 5. 3D modelling of epidermal nerve fiber patterns

    Författare :Konstantinos Konstantinou; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diabetic neuropathy; Anisotropy; point processes.; epidermal nerve fibers;

    Sammanfattning : Neuropathical disorders, such as diabetic neuropathy, damage the nerve structure in the epidermis. This thesis presents statistical analyses and models for the epidermal nerve fibers (ENFs). The main objective is to improve our understanding regarding the three dimensional ENF structure and for this purpose, stochastic models are constructed. LÄS MER