Sökning: "Counting models"

Visar resultat 11 - 15 av 42 avhandlingar innehållade orden Counting models.

  1. 11. Stochastic modelling in disability insurance

    Författare :Björn Löfdahl; Boualem Djehiche; Mogens Steffensen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis consists of two papers related to the stochastic modellingof disability insurance. In the first paper, we propose a stochastic semi-Markovian framework for disability modelling in a multi-period discrete-time setting. LÄS MER

  2. 12. The Powers of Perturbation Theory : Loops and Gauge Invariance in Particle Physics

    Författare :Johan Löfgren; Rikard Enberg; Kimmo Kainulainen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Beyond the Standard Model; Electroweak phase transition; Perturbation theory; High Energy Physics; Högenergifysik;

    Sammanfattning : The Standard Model is the best particle physics theory we have, but there are still phenomena that it cannot explain. In this thesis I have worked on two different projects that connect to two of the biggest unsolved questions of the Standard Model. LÄS MER

  3. 13. Extending the reach of uncertainty quantification in nuclear theory

    Författare :Isak Svensson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The theory of the strong interaction—quantum chromodynamics (QCD)—is unsuited to practical calculations of nuclear observables and approximate models for nuclear interaction potentials are required. In contrast to phenomenological models, chiral effective field theories (χEFTs) of QCD grant a handle on the theoretical uncertainty arising from the truncation of the chiral expansion. LÄS MER

  4. 14. Origin-destination matrix estimation from traffic counts

    Författare :Anders Peterson; Henrik Edwards; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : For most kind of analyses in the field of traffic modeling, there is a need for origin-destination (OD) matrices, which specify the travel demands between the origin and destination nodes in the network. The process of obtaining OD-matrices is long, complicated and expensive. LÄS MER

  5. 15. Properties and tests for some classes of life distributions

    Författare :Bengt Klefsjö; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Life distribution; survival function; exponential distribution; IFR; IFRA; NBUE; DMRL; HNBUE; shock model; total time on test transform; testing of exponentiality;

    Sammanfattning : A life distribution and its survival function F = 1 - F with finitemean y = /q F(x)dx are said to be HNBUE (HNWUE) if F(x)dx < (>)U exp(-t/y) for t > 0. The major part of this thesis deals with the classof HNBUE (HNWUE) life distributions. LÄS MER