Sökning: "SPECTRA"

Visar resultat 1 - 5 av 876 avhandlingar innehållade ordet SPECTRA.

  1. 1. Sparse Modeling of Grouped Line Spectra

    Detta är en avhandling från Centre for Mathematical Sciences, Lund University

    Författare :Ted Kronvall; Lunds universitet.; Lund University.; Lund University.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; line spectra; parameter estimation; convex optimization; group-sparsity; block-sparsity; dictionary learning; ADMM; adaptive penalty; total variation; multi-pitch estimation; chroma; audio processing; TDOA; near-field localization; amplitude modulation;

    Sammanfattning : This licentiate thesis focuses on clustered parametric models for estimation of line spectra, when the spectral content of a signal source is assumed to exhibit some form of grouping. Different from previous parametric approaches, which generally require explicit knowledge of the model orders, this thesis exploits sparse modeling, where the orders are implicitly chosen. LÄS MER

  2. 2. Modélisation théorique de la spectroscopie d'actinides des solvatés

    Detta är en avhandling från Stockholm : Department och Physics, Stockholm University

    Författare :Cecile Danilo; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Actinides; spectra; solution; NATURAL SCIENCES Physics Atomic and molecular physics Chemical physics; NATURVETENSKAP Fysik Atom- och molekylfysik Kemisk fysik; Chemical Physics; kemisk fysik;

    Sammanfattning : The framework of this PhD is the interpretation of Nuclear Magnetic Relaxation Dispersion experiments performed on solvated U4+, NpO2+ and PuO22+, which all have an f2 configuration. Unexpectedly the two actinyl ions have a much higher relaxivity than U4+. LÄS MER

  3. 3. Mean Wind and Turbulence Conditions in the Boundary Layer above Forests

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Johan Arnqvist; Uppsala universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wind power; Forest; Turbulence; Waves; Spectra; Wind model; Atmospheric stability; Vindkraft; Skog; Turbulens; Vågor; Spektra; Modell; Atmosfärisk stabilitet;

    Sammanfattning : As wind turbines have grown, new installation areas become possible. Placing wind turbines in forested landscapes introduce uncertainties to the wind resource estimation. LÄS MER

  4. 4. Bergman space methods and integral means spectra of univalent functions

    Detta är en avhandling från Stockholm : KTH

    Författare :Alan Sola; KTH.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Univalent functions; integral means spectra; Bergman spaces; MATHEMATICS Algebra; geometry and mathematical analysis; MATEMATIK Algebra; geometri och analys;

    Sammanfattning : We study universal integral means spectra of certain classes of univalent functions defined on subsets of the complex plane. After reformulating the definition of the integral means spectrum of a univalent function in terms of membership in weighted Bergman spaces, we describe the Hilbert space techniques that can be used to estimate universal means spectra from above. LÄS MER

  5. 5. Investigations in the band-spectra of some diatomic hydrides : the spectra of the hydrides of the CH, BH and NH type groups ; predissociation phenomena in CuH

    Detta är en avhandling från Stockholm : Hæggströms boktr

    Författare :Bengt Kleman; Stockholms högskola.; [1953]

    Sammanfattning : .... LÄS MER