Sökning: "multivariate test"

Visar resultat 21 - 25 av 169 avhandlingar innehållade orden multivariate test.

  1. 21. Some Investigations into the Class of Exponential Power Distributions

    Författare :Lukas Arnroth; M. Rauf Ahmad; Patrik Andersson; Matúš Maciak; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Exponential power distribution; Skewed exponential power distribution; linear mixed models; score test; Lp-quantiles; quantile regression; posterior convergence rate; Statistics; Statistik;

    Sammanfattning : In this thesis, methods are developed relating to the exponential power class of distributions.Paper I considers Bayesian linear mixed models where the usual normality assumption is replaced by the multivariate exponential power distribution. Particular focus lies on Bayesian testing of the fixed effects. LÄS MER

  3. 22. A strategy for ranking environmentally occuring chemicals

    Författare :Lennart Eriksson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; QSAR; hazard ranking; statistical design; multivariate modelling; halogenated aliphatics; PCA; PLS;

    Sammanfattning : A systematic methodology for quantitative structure-activity relationship (QSAR) development in environmental toxicology is provided. The methodology is summarized in a strategy with six sequential steps. LÄS MER

  4. 23. Development of Protocols for Metabolomics in Biomedical Research using Chemometrics

    Författare :Anders Danielsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mass spectrometry; gas chromatography; design of experiments; Metabolomics; chemometrics; diabetes; metabolism; multivariate analysis;

    Sammanfattning : Metabolomics is a rapidly growing research field. It aims for quantification of all the metabolites in a biological sample such as plasma, saliva, cerebrospinal fluid or cells. LÄS MER

  5. 24. Site variability and settlement patterns : an analysis of the hunter-gatherer settlement system in the Lule River Valley, 1500 B.C.-B.C./A.D

    Författare :Lars L. Forsberg; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Hunter-gatherers; intrasite patterning; multivariate analysis; resource exploitation; settlement patterns; site function;

    Sammanfattning : This thesis deals with questions concerning prehistoric hunter-gatherer society on the River Luleälv in Northern Sweden from c. 1500 B.C. to B. LÄS MER

  7. 25. Acidification trends in Swedish lakes : an assessment of past water chemistry conditions using lake sediments

    Författare :Tom Korsman; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Palaeolimnology; acidification history; alkalization; acid deposition; land-use; lake sediments; near infrared spectroscopy; diatoms; multivariate calibration; Sweden;

    Sammanfattning : This thesis presents temporal perspectives of lake acidification in Sweden. Sediment records have been used to study timing, trends and causes of acidification, and two different techniques for assessing past lake-water acidity are presented. LÄS MER