Sökning: "Uncertainties"

Visar resultat 16 - 20 av 1001 avhandlingar innehållade ordet Uncertainties.

  1. 16. Aircraft composites and aeroelastic tailoring

    Författare :Jakob Kuttenkeuler; KTH; []
    Nyckelord :polymer composites; testing; resin; transfer molding; RTM; process parameters; mechanical properties; aircraft; impact damage; BVID; modal; inverse method; uncertainties; aeroelasticity; optimization; wind tunnel; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : This thesis treats various aspects of structural polymercomposites in aircraft applications. The mechanical performanceand quality of resin transfer molded (RTM) carbon fiberreinforced epoxy composites is studied. LÄS MER

  3. 17. Design and Optimization under Uncertainties : A Simulation and Surrogate Model Based Approach

    Författare :Johan Persson; Johan Ölvander; David Aspenberg; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : This thesis deals with development of complex products via modeling and simulation, and especially the use of surrogate models to decrease the computational efforts when probabilistic optimizations are performed. Many methods that can be used to perform probabilistic optimizations exist and this thesis strives to present and demonstrate the capabilities of a few of them. LÄS MER

  4. 18. Coupled processes in seasonally frozen soils : Merging experiments and simulations

    Författare :Mousong Wu; Per-Erik Jansson; Bjorn Klove; KTH; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Frozen soil; Coupled transport; Energy balance; Uncertainties; Merged study; 冻土；水热盐运移；耦合关系；水热平衡；不确定性; Mark- och vattenteknik; Land and Water Resources Engineering;

    Sammanfattning : Soil freezing/thawing is of importance in the transport of water, heat and solute, with coupled effects. Due to complexity in soil freezing/thawing, uncertainty could be influential in both experimentation and simulation work in frozen soils. LÄS MER

  5. 19. Be lean to be resilient : Setting capabilities for turbulent times

    Författare :Seyoum Eshetu Birkie; Matti Kaulio; Paolo Trucco; Jussi Heikkilä; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Resilience; lean production; synergy; supply chain disruption; dynamic capabilities; mixed method approach; uncertainties; Industriell ekonomi och organisation; Industrial Engineering and Management;

    Sammanfattning : Businesses globally are challenged to innovate their operations strategies and practices towards tighter delivery times, better quality and cheaper prices to remain profitable in addition to managing unpredictable circumstances well in today’s turbulent business environment. They often have to deal with the apparent paradox of advancing efficiency-fostering approaches such as lean production, and enhancing operational resilience against unanticipated disruptions. LÄS MER

  7. 20. Developing and evaluating dose calculation models for verification of advanced radiotherapy

    Författare :Jörgen Olofsson; Mikael Karlsson; Anders Ahnesjö; Crister Ceberg; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiation therapy; high-energy photons; dose calculation; multi-source model; pencil kernel; uncertainties; action levels; Radiological physics; Radiofysik;

    Sammanfattning : A prerequisite for modern radiotherapy is the ability to accurately determine the absorbed dose (D) that is given to the patient. The subject of this thesis has been to develop and evaluate efficient dose calculation models for high-energy photon beams delivered by linear accelerators. LÄS MER