Sökning: "multinomial estimation"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden multinomial estimation.

  1. 1. A Universal Source Coding Perspective on PPM

    Författare :Jan Åberg; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; coding with side information; multinomial estimation; maximum probability codes; MDL estimation; PPM; hierarchical source coding; universal source coding; text compression; lossless data compression; Automation; robotics; control engineering; Automatiska system; robotteknik; reglerteknik;

    Sammanfattning : The PPM (Prediction by Partial Matching) family of text compression algorithms has several members that have shown to be very efficient in practice. This thesis treats PPM algorithms from an information-theoretical point of view, based on results and methods from universal source coding theory. LÄS MER

  3. 2. Structural Models of Network Contacts Between Actors Governed by Activity and Attraction

    Författare :Zhi Geng; Statistiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Directed graph; Ego-nets; EM algorithm; Gibbs sampling; Multinomial distribution; Hypergeometric distribution; Vertex covariates; Clustering coefficient; Taylor expansion;

    Sammanfattning : This thesis consists of five papers on the subject of statistical modeling of stochastic networks. The NG-model proposed in Paper I combines a block structure with parameters that capture the identities of vertices and thus the new approach stresses the concept of ego-nets, which describes the structure around identified vertices. LÄS MER

  4. 3. Applied Methods for Analysis of Economic Structure and Change

    Författare :Christer Anderstig; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economic structure; Input-output models; Information theory; Multinomial logit; Housing choice; Spectral analysis; Urban development;

    Sammanfattning : The thesis comprises five papers and an introductory overview of applied models and methods. The papers concern interdependences and interrelations in models applied to empirical analyses of various problems related to production, consumption, location and trade. LÄS MER

  5. 4. Income Generation in the African and Coloured Population: Three essays on the origins of household incomes in South Africa

    Författare :Sten Dieden; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Africa; South Africa; household incomes; income sources; inequality; labour; unemployment; core; periphery; multinomial logit; endogeneity;

    Sammanfattning : The dissertation comprises three empirical analyses focusing on the origins of South African households? income sources. The income sources are categorized to reflect the households? varying extent of economic core sector integration. LÄS MER

  7. 5. Estimation of wood fibre length distributions from censored mixture data

    Författare :Ingrid Svensson; Sara Sjöstedt - de Luna; Lennart Bondesson; Aila Särkkä; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; censoring; fibre length distribution; identifiability; increment core; length bias; mixture; stochastic EM algorithm; Mathematical statistics; Matematisk statistik;

    Sammanfattning : The motivating forestry background for this thesis is the need for fast, non-destructive, and cost-efficient methods to estimate fibre length distributions in standing trees in order to evaluate the effect of silvicultural methods and breeding programs on fibre length. The usage of increment cores is a commonly used non-destructive sampling method in forestry. LÄS MER