Sökning: "partial observations"

Visar resultat 1 - 5 av 88 avhandlingar innehållade orden partial observations.

  1. 1. Partial Discharges at Fast Rising Voltages

    Författare :Thomas Hammarström; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; short rise time; cavities; high dV dt.; measurements; Partial discharges; square like voltages; repetitive voltages;

    Sammanfattning : The present demand for higher efficiency and flexibility in the energy sector has led to an increased use of power electronic generated waveforms as these allow energy conversion between different frequencies including DC. The generated waveforms are usually synthesized by so called Pulse Width Modulation (PWM) techniques, where the desired waveform is approximated by a number of square shaped pulses with a short rise time. LÄS MER

  2. 2. Case studies in omniparametric simulation

    Författare :Fredrik Lundin; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :growth model; Ising model; Markov chain; omnithermal simulation; omniparametric simulationpercolatiion; Potts model; parameter estimation; partial observations; random cluster model; Richardson model; simulation driven parameter estimation; two-type Richardson model; omnithermal simulation;

    Sammanfattning : In the eld of particle systems and growths models simulation is an important tool. When explicit calculations are too complex or impossible to perform we may use simulations instead. We adapt a new technique here denoted omniparametric simulation, to the two-type Richardson, Ising and Potts models. LÄS MER

  3. 3. Gayted Communities : Marginalized Sexualities in Lebanon

    Författare :Erica Li Lundqvist; Centrum för teologi och religionsvetenskap; []
    Nyckelord :HUMANIORA; HUMANITIES; Queer Theory; Gay; Homosexuality; LGBTQ; Sexuality; Islam; Muslims; Religion; Orientation; Masculinity; Filedwork; Observations; Interviews; Lebanon;

    Sammanfattning : This dissertation offers a unique examination of Muslim masculinities and marginalized sexualities in Lebanon, and is a contribution to the growing body of gay and lesbian studies with a focus on Muslims living in The Middle East. It contributes to the theoretical and methodological development of Islamic studies by introducing and using a queer approach to study marginalized sexualities in relation to Islam. LÄS MER

  4. 4. The Problem of Partial Migration - the Case of the Blue Tit

    Författare :Anna Nilsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Naturvetenskap; Natural science; Djurekologi; Animal ecology; Ekologi; Ecology; weather; personality; partial migration; metabolic rate; evolution of migration; dominance; Cyanistes caeruleus; climate change; blue tit; behavioural strategies; bird migration;

    Sammanfattning : In the evolution of bird migration, partial migration is assumed to be an important intermediate step between migration and residency. Partial migration is characterised by the existence of both migratory and resident individuals in a given population. LÄS MER

  5. 5. The Effect of HV Impulses on Partial Discharge Activity and on the Dielectric Response in Oil-impregnated Paper Insulation

    Författare :Respicius Clemence Kiiza; Hans Edin; Jörgen Blennow; KTH; []
    Nyckelord :Partial discharge; high voltage impulses; oil-impregnated paper; dielectric spectroscopy; Finite Element Method.;

    Sammanfattning : This work investigates how HV impulses affect the behavior of partial discharge (PD) activity and the low voltage dielectric response of oil-impregnated paper insulation. It also investigates how the change in the PD activity is related to the degradation level of oil-impregnated paper insulation. LÄS MER