Sökning: "data- och systemvetenskap Statistik"

Visar resultat 6 - 10 av 22 avhandlingar innehållade orden data- och systemvetenskap Statistik.

  1. 6. Computer Experiments Designed to Explore and Approximate Complex Deterministic Models

    Författare :Davood Shahsavani; Anders Grimvall; Stefano Tarantola; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistics; computer and systems science; Statistik; data- och systemvetenskap;

    Sammanfattning : Computer experiments are widely used to investigate how technical, economic, and ecological systems respond to changes in inputs or driving forces. This thesis is focused on design of computer experiments that can help us better understand the output from complex computer code models. LÄS MER

  3. 7. Stochastic Modeling and Operational Optimization in District Heating Systems

    Författare :Lars Arvastson; Matematisk statistik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistik; actuarial mathematics; programming; operations research; Statistics; Matematik; optimization; Mathematics; simulation; prediction; District heating; grey-box modeling; operationsanalys; programmering; aktuariematematik; Systems engineering; computer technology; Data- och systemvetenskap;

    Sammanfattning : Operation of a district heating system is accomplished via a sequence of decisions by the operators controlling the system. These decisions are based on expectations of conditions in the system that are not known at decision time. LÄS MER

  4. 8. Aspects of analysis of small-sample right censored data using generalized Wilcoxon rank tests

    Författare :Marie-Louise Öhman; Hans Nyquist; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Censored generalized Wilcoxon rank test statistics; Variance estimation; Jackknifing; Influence function; Gross error sensitivity; Break-Down point; Sensitivity curve; Location parameter estimation; Product-Limit estimator and Monte-Carlo Simulation; Statistics; computer and systems science; Statistik; data- och systemvetenskap; Statistics; statistik;

    Sammanfattning : The estimated bias and variance of commonly applied and jackknife variance estimators and observed significance level and power of standardised generalized Wilcoxon linear rank sum test statistics and tests, respectively, of Gehan and Prentice are compared in a Monte Carlo simulation study. The variance estimators are the permutational-, the conditional permutational- and the jackknife variance estimators of the test statistic of Gehan, and the asymptotic- and the jackknife variance estimators of the test statistic of Prentice. LÄS MER

  5. 9. Distribution of expected utility in second-order decision analysis

    Författare :David Sundgren; Högskolan i Gävle; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; beslutsanalys; andra ordningens fördelningar; förväntad nytta; Computer and systems science; Data- och systemvetenskap;

    Sammanfattning : In decision analysis maximising the expected utility is an often used approach in choosing the optimal alternative. But when probabilities and utilities are vague or imprecise expected utility is fraught with complications. LÄS MER

  7. 10. Developing Median Regression for SURE Models : With Application to 3-Generation Immigrants' Data in Sweden

    Författare :Zangin Zeebari; Ghazi Shukur; Håkan Locking; Växjö universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistics; computer and systems science; Statistik; data- och systemvetenskap; Computer and Information Sciences Computer Science; Data- och informationsvetenskap;

    Sammanfattning : .... LÄS MER