Sökning: "temperature"

Visar resultat 1 - 5 av 5331 avhandlingar innehållade ordet temperature.

  1. 1. Thermo-electric temperature measurements in friction stir welding Towards feedback control of temperature

    Detta är en avhandling från Trollhättan : University West

    Författare :Ana Magalhães; Gunnar Bolmsjö; Jeroen De Backer; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FSW; Robotic; Temperature; TWT; Plunge; Control; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : Friction Stir Welding has seen a fast uptake in many industry segments. Mechanical properties superior to fusion welding, the ability to weld "unweldable" aluminium alloys and low distortion are often described as the main reasons for the fast industrial implementation of FSW. Most existing applications consist of long straight welding joints. LÄS MER

  2. 2. Compartment Fire Temperature Calculations and Measurements

    Detta är en avhandling från Luleå University of Technology

    Författare :Alexandra Byström; Ulf Wickström; Sven Thelandersson; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; compartment fire temperature; heat transfer; FEM; calculation of temperature; temperature measurement; fire scenario; validation; flashover; Stålbyggnad; Steel Structures;

    Sammanfattning : This thesis is devoted to heat transfer and fire dynamics in enclosures. It consists of a main part which summarizes and discusses the theory of heat transfer, conservation of energy, fire dynamics and specific fire scenarios that have been studied. LÄS MER

  3. 3. Bacterial and fungal growth in soil: The effect of temperature and substrate addition

    Detta är en avhandling från Department of Biology, Lund University

    Författare :Stephanie Reischke; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bacterial growth; Fungal growth; Respiration; Carbon loading; Glucose mineralisation; Temperature adaptation; Temperature sensitivity; Temperature dependence;

    Sammanfattning : Bacteria and fungi are the main agents in decomposition of soil organic matter. Their activity is determined by the availability and quality of substrate, especially its content of carbon, but also nitrogen and phosphorus. Other environmental factors, which affect the activity of the microbial community in soil, are temperature, moisture and pH. LÄS MER

  4. 4. Spatial variations of the urban climate and its influence on thermal comfort and behaviour

    Detta är en avhandling från Göteborg : Göteborg University

    Författare :Fredrik Lindberg; Göteborgs universitet.; Gothenburg University.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sky view factor; air temperature; surface temperature; GIS; raster modelling; mean radiant temperature; globe temperature; the SOLWIEG-model; human behaviour; outdoor activity;

    Sammanfattning : The increased number of people living in urban areas emphasises the need for an improved understanding of how the urban climate affects human activity and behaviour. The spatial and temporal variation of climate within cities is an important factor in people’s health and well-being. LÄS MER

  5. 5. Low-temperature District Heating : Various Aspects of Fourth-generation Systems

    Detta är en avhandling från Lund : Lund University

    Författare :Helge Averfalk; Sven Werner; Brian Elmegaard; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; District heating; low temperature; three-pipe systems; 4GDH-3P;

    Sammanfattning : With decreasing heat demand and less availability of high-temperature heat supply in future energy systems, the current district heating systems may experience increased competition on the heat market. A viable option to mitigate increasing competition is to operate systems with lower temperature levels, and the most conceivable way to achieve lower temperature levels is to decrease return temperatures. LÄS MER