Sökning: "stochastic assessment"

Visar resultat 21 - 25 av 46 avhandlingar innehållade orden stochastic assessment.

  1. 21. Significance of transport dynamics on concentration statistics and expected mass fraction based risk assessment in the subsurface

    Författare :Veljko Srzic; Vladimir Cvetkovic; Olaf A. Cirpka; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Local scale dispersion; Heterogeneity structure; Concentration moments; Moment collapse; Expected mass fraction;

    Sammanfattning : This thesis relies on a Langrangian framework used for conservative tracer transport simulations through 2-D heterogeneous porous media. Conducted numerical simulations enable large sets of concentration values in both spatial and temporal domains. LÄS MER

  3. 22. Development of Risk Oriented Accident Analysis Methodology for Assessment of Effectiveness of Severe Accident Management Strategy in Nordic BWR

    Författare :Sergey Galushin; Pavel Kudinov; Harri Tuomisto; KTH; []
    Nyckelord :Severe accident management; sensitivity; uncertainty; MELCOR; ROAAM; Svår haverihantering; känslighet och osäkerhetsanalys; MELCOR; ROAAM; Fysik; Physics;

    Sammanfattning : Nordic Boiling Water Reactor (BWR) design employs ex-vessel debris coolability as a severe accident management strategy (SAM). In case of a severe accident, the debris ejected from the vessel are expected to fragment, quench and form a debris bed, which is coolable by a natural circulation of water. LÄS MER

  4. 23. Computational methods for Bayesian inference in macroeconomic models

    Författare :Ingvar Strid; Handelshögskolan i Stockholm; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The New Macroeconometrics may succinctly be described as the application of Bayesian analysis to the class of macroeconomic models called Dynamic Stochastic General Equilibrium (DSGE) models. A prominent local example from this research area is the development and estimation of the RAMSES model, the main macroeconomic model in use at Sveriges Riksbank. LÄS MER

  5. 24. Damage evolution in laminates with manufacturing defects

    Författare :Yongxin Huang; Kristofer Gamstedt; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

    Sammanfattning : In this thesis, experimental investigations and theoretical studies on the stochastic matrix cracking evolution under static loading in composite laminates with manufacturing defects are presented. The presented work demonstrates a methodology that accounts for the statistically distributed defects in damage mechanics models for the assessment of the integrity of composites and for the structural design of composites. LÄS MER

  7. 25. Shaped by the past: Resilience and ecological memory in microbial communities

    Författare :Sophia Renes; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Microorganisms play a fundamental role in global biogeochemical cycles, which are increasingly being altered by the current rapid changes in the environment, threatening biodiversity and the provisioning of key ecosystem services. This thesis addresses key uncertainties surrounding the assessment of ecological resilience and the role of previous disturbances in shaping the stability especially of microbial communities to future disturbances. LÄS MER