Search for dissertations about: "Nonlinearity"

Showing result 21 - 25 of 171 swedish dissertations containing the word Nonlinearity.

  2. 21. Physical effects of nonlinearity in discrete onedimensional systems with spatial variations

    Author : Erik Lennholm; Luis Mario Floria; Linköpings universitet; []
    Keywords : ;

    Abstract : Physical properties of a solid are affected, to a very high degree, by the spatial structure of the material at hand. This thesis is concerned with such effects in nonlinear systems. In itself, nonlinearity is a subject on the move, and more and more areas of physics tend to take nonlinear effects into account. READ MORE

  4. 22. Theoretical studies of acoustic waves with consideration of nonlinearity, dispersion, dissipation and diffraction

    Author : Henrik Sandqvist; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  5. 23. Optical Transmission Systems Based on Phase-Sensitive Amplifiers

    Author : Samuel L I Olsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; optical injection locking; fiber nonlinearities; optical fiber communication; fiber nonlinearity mitigation; four-wave mixing; fiber optic parametric amplification; low-noise amplification; phase-sensitive amplification; fibre optics;

    Abstract : The capacity and reach of today's long-haul fiber optical communication systems is limited by amplifier noise and fiber nonlinearities. Conventional, phase-insensitiveamplifiers (PIAs), have a quantum limited noise figure (NF) of 3 dB at high gain, meaning that with a shot-noise limited input signal the signal-to-noise ratio (SNR)is degraded by at least 3 dB. READ MORE

  6. 24. An Integration-Reduction Scheme for Simulation of Large Systems with Local Nonlinearity and Uncertainty - Application to moving load problems in railway mechanics

    Author : Sadegh Rahrovani; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Monte-Carlo simulations; time-integration; moving load problems; reliability analysis; exponential integrator; symplectic integrator; modal dominancy analysis;

    Abstract : The focus of this research is mainly on computational efficiency, as future work is planned for reliability analysis that will be combined with design optimisation. Both these fields are known to be notoriously computationally demanding. READ MORE

  7. 25. Nonlinear Pulse Propagation in Optical Fibres

    Author : Anders Berntson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Pulse propagation in optical fibre communication systems is affected by the fibre nonlinearity even at relatively low power levels (.... READ MORE