Blar i tittel Doktorgradsavhandlinger (Fakultet for ingeniørvitenskap og teknologi)

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    • Studies of some Operators of Harmonic Analysis in certain Function Spaces with Applications to PDEs 

      Lundberg, Staffan (Doctoral thesis; Doktorgradsavhandling, 2018-12-05)
      The study in this PhD thesis aims at development of certain mathematical methods used in applications, in particular, in the study of regularity properties of solutions in various mathematical models described by Partial Differential Equations (PDEs). To this end, we study various operators of harmonic analysis in certain function spaces, since solutions to many PDEs may be expressed in terms of ...

    • Study of Atmospheric Ice Accretion on Wind Turbine Blades 

      Jin, Jia Yi (Doctoral thesis; Doktorgradsavhandling, 2021-09-02)
      <p>This Ph.D. work concerns itself with the atmospheric ice accretion on wind turbine blades. The wind energy has been at the forefront of the renewable energy generation for the last several decades, with the amount and capacity of installed wind turbines steadily increasing. The cold climate (CC) regions around the world like Finland, Germany, Slovak Republic, Norway, Czech Republic, UK, Sweden, ...

    • A study of bounded operators on martingale Hardy spaces 

      Tutberidze, Giorgi (Doctoral thesis; Doktorgradsavhandling, 2021-12-13)
      <p>The classical Fourier Analysis has been developed in an almost unbelievable way from the first fundamental discoveries by Fourier. Especially a number of wonderful results have been proved and new directions of such research has been developed e.g. concerning Wavelets Theory, Gabor Theory, Time-Frequency Analysis, Fast Fourier Transform, Abstract Harmonic Analysis, etc. One important reason for ...

    • Study of the in-cloud dry ice accretion on cylinders for low values of the Stokes number 

      Sokolov, Pavlo (Doctoral thesis; Doktorgradsavhandling, 2021-08-31)
      The study of the atmospheric ice accretion has received some attention from the scientific community in the past, with the available knowledge spanning from the works of the Langmuir and Blodgett (1946) on the Mt. Washington Observatory till the analytical parameterization of the Finstad et al. (1988), with the latter being the current analytical benchmark and the integral part of the ISO 12494 ...

    • Voltage Control in Smart Distribution Network with High Integration of DERs 

      Wagle, Raju (Doctoral thesis; Doktorgradsavhandling, 2023-12-08)
      The thesis aims to address research questions of how the high integration of distributed energy resources (DER) influences the voltage profile of the distribution network and how the smart converters in DERs can be utilized to address voltage violations. For this purpose, the thesis investigates the coordinated active and reactive power control in smart converters to mitigate voltage violations. To ...