Sökning: "spectral analysis"

Visar resultat 1 - 5 av 399 avhandlingar innehållade orden spectral analysis.

  1. 1. Advanced Spectral Analysis with Applications

    Detta är en avhandling från Uppsala : Institutionen för informationsteknologi

    Författare :Niclas Sandgren; Uppsala universitet.; Uppsala universitet.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; frequency-selective spectral analysis; damped sinusoidal model; prior knowledge; multichannel spectroscopy; phantom experimental data; in-vivo in-vitro data analysis; area-selective analysis; cepstrum thresholding; total-variance reduction; two-dimensional spectral estimation; spectral smoothing; irregular sampling; CARMA signals; TECHNOLOGY Information technology Signal processing; TEKNIKVETENSKAP Informationsteknik Signalbehandling;

    Sammanfattning : Spectral analysis has advanced the last decades as a signal processing tool to extract significant information about certain properties of measured data. The practical use of spectral analysis techniques in time-series analysis has been emphasized in the immense amount of previous literature in the field and by a rapidly growing number of applications. LÄS MER

  2. 2. Type Ia Supernova Cosmology Quantitative Spectral Analysis

    Detta är en avhandling från Stockholm : Fysikum

    Författare :Gastón Folatelli; Stockholms universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supernova; Cosmology; Spectroscopy; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Sammanfattning : Type Ia supernovae have been successfully used as standardized candles to study the expansion history of the Universe. In the past few years, these studies led to the exciting result of an accelerated expansion caused by the repelling action of some sort of dark energy. LÄS MER

  3. 3. Asymptotic and universal spectral estimates with applications in many-body quantum mechanics and spectral shape optimization

    Detta är en avhandling från Stockholm, Sweden : KTH Royal Institute of Technology

    Författare :Simon Larson; KTH.; [2019]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spectral theory; shape optimization; semiclassical asymptotics; spectral inequalities; quantum mechanics; Matematik; Mathematics;

    Sammanfattning : This thesis consists of eight papers primarily concerned with the quantitative study of the spectrum of certain differential operators. The majority of the results split into two categories. LÄS MER

  4. 4. Computational Aspects of Maass Waveforms

    Detta är en avhandling från Uppsala : Matematiska institutionen

    Författare :Fredrik Strömberg; Uppsala universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical analysis; Maass waveform; Congruence subgroup; Noncongruence subgroup; Multiplier system; Theta multiplier system; Eta multiplier system; real weight; Hecke operator; Involution; Dirichlet character; Spectral Theory; Computation; Matematisk analys; MATHEMATICS Algebra; geometry and mathematical analysis Mathematical analysis; MATEMATIK Algebra; geometri och analys Analys; matematik; Mathematics;

    Sammanfattning : The topic of this thesis is computation of Mass waveforms, and we consider a number of different cases: Congruence subgroups of the modular group and Dirichlet characters (chapter 1); congruence subgroups and general multiplier systems and real weight (chapter 2); and noncongruence subgroups (chapter 3). In each case we first discuss the necessary theoretical background. LÄS MER

  5. 5. Spectral Estimation by Geometric, Topological and Optimization Methods

    Detta är en avhandling från Stockholm : KTH

    Författare :Per Enqvist; KTH.; [2001]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spectral Estimation; ARMA models; Covariance analysis; Cepstral analysis; Markov parameters; Global analysis; Convex Optimization; Continuation methods; Entropy maximization; MATHEMATICS Applied mathematics Optimization; systems theory; MATEMATIK Tillämpad matematik Optimeringslära; systemteori;

    Sammanfattning : .... LÄS MER