Sökning: "modulated"

Visar resultat 16 - 20 av 654 avhandlingar innehållade ordet modulated.

  1. 16. Analysis and Reduction of Parasitic Effects in Induction Motors With Die-Cast Rotors

    Författare :Alexander Stening; Chandur Sadarangani; Nicola Bianchi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium rotors; asynchronous torques; copper rotors; die-cast rotors; induction machines; inter-bar currents; modulated rotors; starting torque; stray losses; synchronous torques;

    Sammanfattning : This thesis presents a study of inter-bar current effects on induction motors with die-cast aluminium and die-cast copper rotors. The parasitic effects introduced by these currents are analyzed and possible solutions to these problems are presented. This is realized by developing analytical tools for the simulation of inter-bar current effects. LÄS MER

  3. 17. Temporal Modulation in Fluorescence Spectroscopy and Imaging for Biological Applications

    Författare :Gustav Persson; Jerker Widengren; Jörg Enderlein; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fluorescence; spectroscopy; microscopy; modulated excitation; intensity modulation; fluorescence correlation spectroscopy; transient states; molecular kinetics; Physics; Fysik;

    Sammanfattning : This thesis explores the benefits of intensity modulation for the purpose of extending the range of applications of fluorescence spectroscopy and imaging in cellular and molecular biology and medicine. Long-lived transient states of fluorescent molecules can, because of their long lifetimes, be used to detect subtle changes in the microenvironment of the molecule. LÄS MER

  4. 18. Between Law and Safety : Licensed Aircraft Maintenance Engineers and the Socio-professional Construction of Legality in European Civil Aviation

    Författare :John Woodlock; Rättssociologiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sectorial legal consciousness; aircraft maintenance; just culture; soft law; procedural justice; modulated derogation; legitimacy; compliance; comparative socio-legal research; occurrence reporting; safety management; safety first;

    Sammanfattning : The survey and interview-based mixed methods research presented in this compilation dissertation explores how licensed aircraft maintenance engineers in Sweden, Norway and Portugal experience working under the vertical chain of hard and soft law that makes up the European Union regulation of this sector. By focusing on occurrence reporting and the certification and release of aircraft into service, as two regulated phenomena directly shaping the everyday working lives of these maintenance engineers, the research ultimately found that a sectorial legal consciousness emerged that is characterised by normative pluralism and a shared professional cultural allegiance to a norm of putting safety first. LÄS MER

  5. 19. Optical frequency modulated continuous wave (FMCW) range and velocity measurements

    Författare :Daniel Nordin; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Electronics; Industriell elektronik;

    Sammanfattning : Today a number of different optical techniques capable of measuring range, velocity or both exist. With recent advancements in laser diode manufacturing, small tunable sources have become available. By modulating current supplied to the laser the optical output frequency can be modulated. LÄS MER

  7. 20. Robust optimization of radiation therapy accounting for geometric uncertainty

    Författare :Albin Fredriksson; Anders Forsgren; Timothy C. Y. Chan; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optimization; intensity-modulated proton therapy; uncertainty; robust planning; setup error; range error; intensity-modulated radiation therapy; multicriteria optimization;

    Sammanfattning : Geometric errors may compromise the quality of radiation therapy treatments. Optimization methods that account for errors can reduce their effects.The first paper of this thesis introduces minimax optimization to account for systematic range and setup errors in intensity-modulated proton therapy. LÄS MER