Sökning: "tower"

Visar resultat 16 - 20 av 86 avhandlingar innehållade ordet tower.

  1. 16. Resistance of Friction Connections with Open Slotted Holes in Towers for Wind Turbines

    Författare :Christine Heistermann; Peter Schaumann; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel Structures; Stålbyggnad;

    Sammanfattning : The most common solutions for in-situ connections of steel tubular towersegments of onshore wind turbines are ring flange connections. These havecertain drawbacks, such as e.g. costly production, long delivery time and ratherlow fatigue endurance. LÄS MER

  3. 17. Evaporative Cycles - in Theori and in Practise

    Författare :Per M Rosén; Kraftverksteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Motors and propulsion systems; Trigeneration; Combustion Engines; Gas Turbines; CHAT; HAM; HAT; Evaporative Cycles; EvGT; Motorer; framdrivningssystem; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik;

    Sammanfattning : The thesis is based on applied research, rather closed to industrial development. The developed simulation model, for pre-design of evaporative gas turbine cycles, has been validated in a 600 kW pilot plant and in rebuilt turbo-charged diesel engines. LÄS MER

  4. 18. Att ordna, från ordning till ordning. Yngre förskolebarns matematiserande

    Författare :Maria Reis; Högskolan i Borås; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; variationsteori; differentiera; toddlare; matematik; yngre barn; dimensioner av variation; lärande i förskolan; Teacher Education and Education Work; Lärarutbildning och pedagogisk yrkesverksamhet; matematik; yngre barn; variationsteori; dimensioner av variation; differentiera; lärande i förskolan; toddlare;

    Sammanfattning : A starting point for this study was an interest based in my earlier experience that most of the youngest children’s mathematizing in everyday life was unspoken and unknown. The aim of this thesis is to contribute to the knowledge about how toddlers mathematize and develop mathematical knowledge and understanding through activities with concrete material. LÄS MER

  5. 19. Radar Measurements of Temporal Variation in a Boreal Forest

    Författare :Albert Monteith; Chalmers tekniska högskola; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; remote sensing; temporal variation; tomography; antenna array; temporal coherence; Synthetic aperture radar SAR ;

    Sammanfattning : Synthetic aperture radar (SAR) on a satellite platform is a suitable technique for all-weather global monitoring of forest parameters such as biomass. This is important for increasing the accuracy of the global terrestrial carbon flux, the largest uncertainty in our current understanding of the Earth’s carbon cycle. LÄS MER

  7. 20. Studying Buoy Motion for Wave Power : Experiments at the Lysekil Research Site

    Författare :Simon Tyrberg; Uppsala universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Since 2002, the Division for Electricity at Uppsala University has been running the Lysekil project. The project is an attempt to construct and evaluate a technology for extracting electrical energy from the motion of ocean waves. The idea is to let this up-and-down motion drive a linear generator. LÄS MER