Sökning: "arbitrary"

Visar resultat 1 - 5 av 624 avhandlingar innehållade ordet arbitrary.

  1. 1. Analysis of Dipole and Patch Antennas in Cylindrical Structures

    Författare :Peter Slättman; Chalmers University of Technology; []
    Nyckelord :Fourier transform; cross-section; patch; slot; arbitrary; EFIE; trough guide; cylindrical; dipole; moment method; antenna; aperture coupled;

    Sammanfattning : This thesis deals with the analysis of dipoles, patches, and aperture coupled patches located in an infinitely long cylindrical structure with arbitrary cross-section. The analysis exploits the two-dimensional nature of the structure by expanding all fields and currents in spatial harmonics along the cylinder axis, and solving the subsequent spectral two-dimensional problems by the moment method. LÄS MER

  2. 2. Technology and Sexual Difference

    Författare :Monica Obreja; Nina Lykke; Cathrine Egeland; Linköpings universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Sexual difference; technology; gender-technology co-construction; gender; sex; arbitrary; contingent; historical association; masculin ity; weak thesis; strong thesis; Luce Irigaray; the feminine; Könsskillnad; teknik; genus-teknik-samkonstruktion; genus; kön; arbiträrt; kontingent; historical association; maskulinitet; weak thesis; strong thesis; Luce Irigaray; det feminina;

    Sammanfattning : The aim of this thesis is to interrogate a particular understanding of gender and technology as co-constructed from the standpoint of sexual difference theory by showing what this conceptualization of gender and technology excludes. It is also an attempt to enable an understanding of what is excluded by elaborating upon the conditions for thinking technology, gender and sexual difference differently. LÄS MER

  3. 3. Arbitrary thin-walled cross sections : theory and computer implementation

    Författare :Stefan Edlund; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  4. 4. Characterization of Electrical Insulation Exposed to Arbitrary Voltage Waveforms

    Författare :Björn Sonerud; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; arbitrary voltage waveforms; partial discharge; diagnostics; dielectric response measurement; signal processing; electrical treeing; dielectric heating.;

    Sammanfattning : The extensive use of power electronics in power systems today gives rise to other voltage waveforms than the conventional 50/60 Hz sinusoidal and consequently other types of electric stress act on high voltage insulating materials. Previous studies has shown that Pulse Width Modulated (PWM) voltages and similar waveforms increase stress in Adjustable Speed Drives (ASD) as compared with sinusoidal waveforms and it has also been shown that partial discharge (PD) activity is intensified during PWM voltages and that rise time of square like pulses affect PD inception voltage. LÄS MER

  5. 5. Numerical simulation of thermomechanical rolling contact using an arbitrary Lagrangian-Eulerian formulation

    Författare :Andreas Draganis; Chalmers University of Technology; []
    Nyckelord :rolling contact; finite element method; thermomechanical analysis; arbitrary Lagrangian--Eulerian;

    Sammanfattning : In the endeavour to further the understanding of thermomechanical rolling contact, numerical simulations serve as an important complement to laboratory and full-scale testing. In the development of numerical simulation methods, the challenge is to enhance predictive capabilities while keeping computational efforts reasonable. LÄS MER