Sökning: "mixture theory"

Visar resultat 16 - 20 av 146 avhandlingar innehållade orden mixture theory.

  1. 16. Essays on Sample Surveys : Design and Estimation

    Författare :Edgar Bueno; Per Gösta Andersson; Maria Giovanna Ranalli; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; GREG estimator; mixture distribution; probability proportional to size sampling; sampling algorithms; sampling design; sampling strategy; survey sampling; stratified sampling; Statistics; statistik;

    Sammanfattning : Sampling is a core stage in every survey. A sampling design carefully elaborated may imply not only a more accurate estimation of the parameters of interest, but also a reduction in the required sample size in a study. In this thesis we consider two particular but connected subjects. LÄS MER

  3. 17. Methods for longitudinal brain imaging studies with dropout

    Författare :Tetiana Gorbach; Xavier de Luna; Anders Lundquist; Martin A. Lindquist; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Missing data; nonignorable dropout; sensitivity analysis; uncertainty intervals; pattern-mixture models; aging; cognition; MRI; brain structure; resting-state functional connectivity; Statistics; statistik;

    Sammanfattning : One of the challenges in aging research is to understand the brain mechanisms that underlie cognitive development in older adults. Such aging processes are investigated in longitudinal studies, where the within-individual changes over time are observed. However, several methodological issues exist in longitudinal analyses. LÄS MER

  4. 18. L'Effet-sincérité : L'Autobiographie littéraire vue à travers la critique journalistique : L'Exemple de La Force des choses de Simone de Beauvoir

    Författare :Vivi-Anne Lennartsson; Franska; []
    Nyckelord :HUMANIORA; HUMANITIES; La Force des choses Force of Circumstance ; Simone de Beauvoir; literary criticism; theory of autobiography; theory of literary evaluation; sincerity effect; textual engagement; emotional textual quality; style evaluation; autobiographical style; Simone de Beauvoir s style; Les Mandarins The Mandarins ; Georges Gusdorf; Björn Larsson; Philippe Lejeune; Morten Nøjgaard.; Fransk litteratur; French literature; autobiography; Reception; General and comparative literature; literature criticism; literary theory; Allmän och jämförande litteratur; litteraturkritik; litteraturteori;

    Sammanfattning : In light of autobiographical theory, this study deals with the critics' reception of Simone de Beauvoir's La Force des choses when the book was first published in 1963 in France. The three main parts examine the critical comments on the genre, the final controversial words expressing the author's disappointment, and the evaluation of her style. LÄS MER

  5. 19. Spatio-Temporal Estimation for Mixture Models and Gaussian Markov Random Fields - Applications to Video Analysis and Environmental Modelling

    Författare :Johan Lindström; Matematisk statistik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; vegetation; time series analysis; video segmentation; spatio-temporal modelling; precipitation; Markov chain Monte Carlo; Gaussian Markov random fields; expectation maximisation; change point detection; Bayesian recursive estimation; African Sahel; adaptive Gaussian mixtures;

    Sammanfattning : In this thesis computationally intensive methods are used to estimate models and to make inference for large, spatio-temporal data sets. The thesis is divided into two parts: the first two papers are concerned with video analysis, while the last three papers model and investigate environmental data from the Sahel area in northern Africa. LÄS MER

  7. 20. Unpacking Sanitation Planning Comparing Theory and Practice

    Författare :Jennifer R Mc Conville; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Participation; Sustainability; Urban; Procedural planning theory; Decision-making; Sanitation; Process; Planning practice;

    Sammanfattning : Lack of proper sanitation is linked to significant negative impacts on environmental and public health, economy, and human dignity. Despite the efforts made to reach the United Nations Millennium Development Goals, the world will miss its target of halving the percentage of people without access to improved sanitation by 2015; and there is general agreement within the field of sanitation that the sector has failed to deliver substantial improvements to the most needy. LÄS MER