Search for dissertations about: "thomas eriksson"

Showing result 1 - 5 of 38 swedish dissertations containing the words thomas eriksson.

  1. 1. High Voltage Insulation Diagnostics Utilizing HTS-SQUID Based Amplifiers

    Author : Thomas Eriksson; Chalmers University of Technology; []
    Keywords : dielectric response; current amplifier; partial discharge; Rogowski sensor; SQUID; voltage amplifier;

    Abstract : In the design and development of high voltage insulation systems, different diagnostic methods are often used for system characterization. It is therefore crucial to continuously improve existing methods and to develop new ones. READ MORE

  2. 2. Speech coding from a variable rate perspective

    Author : Thomas Eriksson; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; CELP; variable rate coding; speech coding;

    Abstract : .... READ MORE

  3. 3. Vector Quantization in Speech Coding. Variable Rate, Memory and Lattice Quantization

    Author : Thomas Eriksson; Chalmers University of Technology; []
    Keywords : ;

    Abstract : This dissertation focuses on different quantization methods in speech coding. Variable rate quantization has the potential to substantially reduce the bit rate requirements in speech coding. READ MORE

  4. 4. Stable Numerical Methods with Boundary and Interface Treatment for Applications in Aerodynamics

    Author : Sofia Eriksson; Jan Nordström; Gunilla Kreiss; Thomas Hagstrom; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; summation by parts; simultaneous approximation term; accuracy; stability; finite difference methods; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Abstract : In numerical simulations, problems stemming from aerodynamics pose many challenges for the method used. Some of these are addressed in this thesis, such as the fluid interacting with objects, the presence of shocks, and various types of boundary conditions. READ MORE

  5. 5. Control of Wave Energy Converters in arrays

    Author : Simon Thomas; Jens Engström; Mikael Eriksson; Jan Isberg; Erland Strömstedt; Axel Bochert; Uppsala universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

    Abstract : One way to lower the levelized cost of energy for wave power plants and paving so the way for commercial success, is to increase the power absorption by use of advanced control algorithms. This thesis investigates the influence of the generator inertia, the generator damping and the layout on power absorption and presents a new model free strategy of controlling wave energy converters. READ MORE