Sökning: "Third Pole"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Third Pole.

  1. 1. Towards an improved understanding of precipitation variations over the Tibetan Plateau

    Författare :Hui-Wen Lai; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Third Pole; Tibetan Plateau; precipitation; Asian summer monsoon; westerly jets; Regional Climate Model; satellite observation;

    Sammanfattning : The Tibetan Plateau (TP) and surrounding regions are known as the ``Third Pole'' because of their polar-like environment and large reservoirs of fresh water. Due to the latter aspect, the TP is also considered the ``Water Tower of Asia'', providing essential water resources to the surrounding regions. LÄS MER

  3. 2. Climate and development at the third pole : dynamics of power and knowledge reshaping community forest governance in Nepal

    Författare :Dil Khatri Bahadur; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : Given the international climate objectives of adaptation and REDD+ being adopted in many developing countries there are growing concerns about their effects. This thesis seeks to investigate the implications of implementing climate objectives for community forestry governance. LÄS MER

  4. 3. Electromagnetic Analysis of Hydroelectric Generators

    Författare :Martin Ranlöf; Urban Lundin; Georg Traxler-Samek; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Contra-rotating rotors; damping torque; damper winding; finite element method; hydroelectric generators; permeance model; pole shoe shape; rotational losses; single machine infinite bus; slot ripple; synchronizing torque; synchronous machines; voltage waveform.; Engineering physics; Teknisk fysik; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Hydropower maintains its position as the most important source of renewable electric energy in the world. The efficiency of large hydropower plants is unsurpassed, and after more than hundred years of development, the technology is mature and highly reliable. LÄS MER

  5. 4. Measurement and modelling of unbalanced magnetic pull in hydropower generators

    Författare :Mattias Wallin; Urban Lundin; Antero Arkkio; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Damper winding; eddy currents; field winding short circuit; finite element method; hydropower generator; parallel circuits; rotor eccentricity; salient poles; synchronous generators; synchronous machines; UMP; unbalanced magnetic pull.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Hydropower research is often perceived to be an old and exhausted field of study but with ageing equipment and the need for more intermittent operation caused by an increased share of other renewable energy sources new challenges lie ahead.The main focus of this dissertation are the electromagnetic forces resulting from nonuniform air gap flux, whether it be caused by rotor eccentricity or a faulty field winding. LÄS MER

  7. 5. Frequency Domain Aspects of Modeling and Control in Adaptive Systems

    Författare :Svante Gunnarsson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Frequency domain aspects; Adaptive systems;

    Sammanfattning : In this thesis various aspects of modeling and control in adaptive systems are presented from a frequency domain viewpoint.The thesis consists of three parts, where the first part contains a general introduction and background information concerning the problems that will be treated. LÄS MER