Search for dissertations about: "clustered sources."

Showing result 1 - 5 of 8 swedish dissertations containing the words clustered sources..

  2. 1. Performance Analysis of Parametric Spectral Estimators

    Author : Björn Völcker; KTH; []
    Keywords : Parameter estimation; line spectral estimation; estimator design; wideband signals; clustered sources.;

    Abstract : .... READ MORE

  4. 2. Earthquake Sources, the Stress Field and Seismic Hazard : A Study in Eritrea and its Surrounding

    Author : Lijam Zemichael Hagos; Roland Roberts; Hossein Shomali; Kuvvet Atakan; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Seismic hazard; Focal mechanism; Moment tensor inversion; Stress field; Afar depression; Eritrea; Geovetenskap; Earth sciences; Geovetenskap;

    Abstract : Presented in this thesis are some basic concepts and applications of seismic hazard analysis and the elements that influence the amplitude and geometric attenuation of earthquake ground motion. This thesis centers on the identification of the styles of failure, focal mechanisms, and the state of regional stress in the study area. READ MORE

  5. 3. Managerial perceptions of the cultural distance basis for internationalization decisions by firms : implications for 'low-tech' industries

    Author : Goudarz Azar; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Abstract : The role of managerial perceptions of cultural distance in the internationalization decisions of 'LOW-TECH' firms is explored in this thesis. A first empirical study examined managers' perceptions of dissimilarity in food culture in foreign markets (food culture distance), as an antecedent to adaptation of an export marketing strategy for food companies. READ MORE

  6. 4. Simulations of Cosmic Reionization : Shapes & Sizes of H II regions around Galaxies and Quasars

    Author : Martina M. Friedrich; Garrelt Mellema; Jonathan Pritchard; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; astronomi;

    Abstract : After the era of recombination, roughly 360 000 years after the big bang (redshift 1100), the universe was neutral, continued to expand and eventually the first gravitationally collapsed structures capable of forming stars, formed. Observations show that approximately 1 billion years later (redshift 6), the Universe had become highly ionized. READ MORE

  7. 5. Sparse Modeling of Grouped Line Spectra

    Author : Ted Kronvall; Statistical Signal Processing Group; []
    Keywords : 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;

    Abstract : 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. READ MORE