Sökning: "fast wave"

Visar resultat 1 - 5 av 153 avhandlingar innehållade orden fast wave.

  1. 1. Elastic properties and structural stabilities of elements and compounds

    Författare :Lars Fast; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

    Sammanfattning : A first principles study of the elastic and structural properties of selected elements and compounds is presented. The theoretical basis for these investigations is the density functional theory, in combination with a full potential linear muffin-tin orbital method. LÄS MER

  3. 2. Fast wave heating and current drive in tokamaks

    Författare :Martin Laxåback; Torbjörn Hellsten; Raymond Koch; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tokamak; JET; ITER; thermonuclear fusion; fast wave; heating; current drive; ion cyclotron resonance; polychromatic; finite orbit widths; RF-induced transport; neutral beam injection; fusion born alpha particles; magnetosonic eigenmodes; parasitic absorption; modelling; weighted Monte Carlo scheme; Fysik; Physics; Fysik;

    Sammanfattning : This thesis concerns heating and current drive in tokamak plasmas using the fast magnetosonic wave in the ion cyclotron range of frequencies. Fast wave heating is a versatile heating method for thermonuclear fusion plasmas and can provide both ion and electron heating and non-inductive current drive. LÄS MER

  4. 3. Fast wave heating of cyclotron resonant ions in tokamaks

    Författare :Thomas Johnson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fusion plasma; tokamak; RF heating; fast wave heating; fast wave current drive; ion cyclotron resonance; ICRH; ICRF; ICCD; RF induced rotation; RF induced transport; RF induced pinch; RF pinch; finite orbit width; fast wave current drive; self-consi; Engineering physics; Teknisk fysik;

    Sammanfattning : .... LÄS MER

  5. 4. Millimeter-wave Communication and Radar Sensing — Opportunities, Challenges, and Solutions

    Författare :Sining An; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dynamic; BiCMOS; OFDM; synchronization; Millimeter-wave; range accuracy; radar; communication system; micrometer; high data rate; frequency divider; wideband; phase modulated; monitoring; carrier recovery; distance measurement; mobile network; sensing; fast Fourier transformation FFT .; SiGe;

    Sammanfattning : With the development of communication and radar sensing technology, people are able to seek for a more convenient life and better experiences. The fifth generation (5G) mobile network provides high speed communication and internet services with a data rate up to several gigabit per second (Gbps). LÄS MER

  7. 5. Om implementation of maximally fast wave digital filters

    Författare :Mark Vesterbacka; Markuu Renfors; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : An approach to design and implement fixed-function digital filters using bit-serial arithmetic is proposed. The resulting implementations are maximally fast, i.e., the maximal sample frequency fmax is equal to the upper bound on the sample frequency given by the recursive parts of the algorithm. LÄS MER