Search for dissertations about: "Fourier Analysis"
Showing result 1 - 5 of 225 swedish dissertations containing the words Fourier Analysis.
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1. Computer methods for voice analysis
Abstract : This thesis consists of five articles and a summary. Thethesis deals with methods for measuring properties of thevoice. The methods are all computer-based, but utilisedifferent approaches for measuring different aspects of thevoice. Paper I introduces the Visual Sort and Rate (VSR) method forperceptual rating of voice quality. READ MORE
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2. Propagation of singularities for pseudo-differential operators and generalized Schrödinger propagators
Abstract : In this thesis we discuss different types of regularity for distributions which appear in the theory of pseudo-differential operators and partial differential equations. Partial differential equations often appear in science and technology. READ MORE
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3. Deciphering the role of genetics and circadian rhythm in cluster headache
Abstract : Cluster headache (CH) is a complex neurovascular disorder with a distinct circadian attack pattern. Although many aspects of the disease’s pathophysiology remain to be elucidated, it is likely caused by a combination of different genetic and environmental risk factors. READ MORE
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4. Some new Fourier multiplier results of Lizorkin and Hörmander types
Abstract : This PhD Thesis is devoted to the study of Fourier series and Fourier transform multipliers and it contains four papers (papers A - D) together with an introduction, which put these papers into a general frame. This extensive introduction can also be seen as an independent description of this important area including the historical development and the most important results. READ MORE
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5. Relations between functions from some Lorentz type spaces and summability of their Fourier coefficients
Abstract : This Licentiate Thesis is devoted to the study of summability of the Fourier coefficients for functions from some Lorentz type spaces and contains three papers (papers A - C) together with an introduction, which put these papers into a general frame.Let $\Lambda_p(\omega),\;\; p>0,$ denote the Lorentz spaces equipped with the (quasi) norm$$\|f\|_{\Lambda_p(\omega)}:=\left(\int_0^1\left(f^*(t)\omega(t)\right)^p\frac{dt}{t}\right)^{\frac1p}$$for a function $f$ on [0,1] and with $\omega$ positive and equipped with some additional growth properties. READ MORE
