Sökning: "device modelling"

Visar resultat 1 - 5 av 81 avhandlingar innehållade orden device modelling.

  1. 1. Optical modelling of conjugated polymers : from materials to devices

    Detta är en avhandling från Linköping : Linköpings universitet

    Författare :Nils-Krister Persson; Andy Monkman; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spectroscopic ellipsomctry; optical modelling; organic solar cell; conjugated polymer; polyfluorene; polythiophene; copolymer; fullerene blend; photovoltaic device; dielectric function; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : Measurements and modelling of theoretical properties of polymer-based photovoltaic devices, PPVDs, are the subjects of this thesis. Modelling refers both to modelling of materials, based on extraction of the dielectric function, and to modelling of devices by computer simulation of the optical electrical field inside PPVDs. LÄS MER

  2. 2. Investigation of Forces and Contact Area for Modelling Turning Processes

    Detta är en avhandling från Stockholm : KTH

    Författare :Ove Bayard; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Modelling; turning processes; cutting forces; contact length; Quick Stop Device; QSD; simulation programs; FEM; predictive models.; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : This thesis is focused on an investigation of forces andcontact area for modelling turning processes. The primary taskin short term research has been to take a first steptowards animproved model of the cutting process. LÄS MER

  3. 3. Frost modelling and pavement temperatures summer pavement temperaures and frost modelling

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Åke Hermansson; [2000]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Geoteknik; Soil Mechanics;

    Sammanfattning : Three papers form the present thesis. In paper I a numerical model for calculation of surface temperatures on a highway is presented. The model takes all relevant factors into consideration, i.e. LÄS MER

  4. 4. Nonlinear Characterisation and Modelling of Microwave Semiconductor Devices

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Mattias Thorsell; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; noise modelling; nonlinear measurement; active load-pull; noise measurement; thermal characterisation; AlGaN GaN HEMT; nonlinear modelling;

    Sammanfattning : There is an increasing need for more accurate models taking into account the nonlinearities and memory effects of microwave transistors. The memory effects are especially important for transistor technologies suffering from relatively large low frequency dispersion, such as GaN baed HEMTs. LÄS MER

  5. 5. Characterisation and Modelling of Graphene FETs for Terahertz Mixers and Detectors

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :MICHAEL ANDERSSON; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; graphene; millimetre and submillimetre waves; power detectors; nonlinear device modelling; microwave amplifiers; nanofabrication; integrated circuits; noise modelling; Field-effect transistors FETs ; terahertz detectors; Volterra; subharmonic resistive mixers;

    Sammanfattning : Graphene is a two-dimensional sheet of carbon atoms with numerous envisaged applications owing to its exciting properties. In particular, ultrahigh-speed graphene field effect transistors (GFETs) are possible due to the unprecedented carrier velocities in ideal graphene. LÄS MER