Sökning: "causal models"

Visar resultat 1 - 5 av 100 avhandlingar innehållade orden causal models.

  1. 1. Probabilistic Sequence Models with Speech and Language Applications

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Gustav Eje Henter; KTH.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Time series; acoustic modelling; speech synthesis; stochastic processes; causal-state splitting reconstruction; robust causal states; pattern discovery; Markov models; HMMs; nonparametric models; Gaussian processes; Gaussian process dynamical models; nonlinear Kalman filters; information theory; minimum entropy rate simplification; kernel density estimation; time-series bootstrap;

    Sammanfattning : Series data, sequences of measured values, are ubiquitous. Whenever observations are made along a path in space or time, a data sequence results. To comprehend nature and shape it to our will, or to make informed decisions based on what we know, we need methods to make sense of such data. LÄS MER

  2. 2. On the Application of Short-term Causal Models

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Anders Baudin; Umeå universitet.; [1977]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Causal (econometric) models are often employed as instruments for for-casting in short-term planning within organizations. The aim of this work is to contribute to an understanding of the short-term aspects of causal model building. LÄS MER

  3. 3. Covariate selection and propensity score specification in causal inference

    Detta är en avhandling från Umeå : Statistik

    Författare :Ingeborg Waernbaum; Umeå universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Covariate selection; graphical models; matching; observational studies; treatment effects; unconfoundedness; SOCIAL SCIENCES Statistics; computer and systems science Statistics; SAMHÄLLSVETENSKAP Statistik; data- och systemvetenskap Statistik;

    Sammanfattning : This thesis makes contributions to the statistical research field of causal inference in observational studies. The results obtained are directly applicable in many scientific fields where effects of treatments are investigated and yet controlled experiments are difficult or impossible to implement. LÄS MER

  4. 4. Arbetstillfredsställelse och frånvaro

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Jonas Höög; Umeå universitet.; [1985]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Job satisfaction; abscence; work environment; consciousness; job-factors; social background; life situation; causal models; path analysis;

    Sammanfattning : .... LÄS MER

  5. 5. Attrition in Studies of Cognitive Aging

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Maria Josefsson; Umeå universitet.; [2013]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Attrition; missing data; age-related cognitive change; non- ignorable dropout; monotone missing pattern; mixture models; pattern- mixture models; imputation; Statistics; statistik;

    Sammanfattning : Longitudinal studies of cognition are preferred to cross-sectional stud- ies, since they offer a direct assessment of age-related cognitive change (within-person change). Statistical methods for analyzing age-related change are widely available. LÄS MER