Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"higher-order spectra"”.
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Higher Order Spectra and Universal Shape Functions in Avalanche Models
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-24T20:30:19Z No. of bitstreams: 1 Mehta_Amit.pdf: 7026482 bytes, checksum: 1444de396ed7dcadf0f35e9a3eec8bae (MD5)
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Higher-order statistic-based detection of non-Gaussian signals
Using the Gaussian noise rejection property of higher-order spectra (HOS), HOS-based detectors can outperform conventional second-order (SOS) techniques in certain scenarios. In this thesis we study the strengths and limitations of HOS detection techniques, as well as proper applications for them. …
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Identification of Transient Nonlinear Aeroelastic Phenomena
… methodologies. In this thesis, wavelet-based higher order spectra are applied to identify different nonlinear aeroelastic phenomena as encountered in two experiments. First, the analysis is applied to a set of experiments involving a flexible semispan model (FSM) of a High Speed Civil …
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Identification of Finite-Degree-of-Freedom Models for Ship Motions
… is a combination of perturbation techniques and higher-order spectral moments. We apply this methodology to identify the nonlinear parameters that cause parametric roll resonance. The level of accuracy of the models and the parameter estimates are determined by validations of the predicted ship …
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Nonlinear System Identification of Physical Parameters for Damage Prognosis and Localization in Structures
… to damage. Additionally, vibration-based spectral quantities are related to physical properties of the structure under test. In this thesis, nonlinear response to parametric excitation is exploited for nonlinear system identification of metallic and composite beam-mass systems before …
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Analysis of surface pressure and velocity fluctuations in the flow over surface-mounted prisms
… with wind loads on structures is of the order of 10^7. This is further complicated by the high levels of turbulence fluctuations associated with strong winds. On the other hand, numerical and wind tunnel simulations are usually carried out at smaller values of Re. Consequently, the …
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On characterisation and decomposition of internet traffic dynamics
… of Time-Frequency (TF) representations and higher order spectra for validating de facto statistical assumptions on a microscopic, protocol-specific approach. Validation of Gaussianity, linearity and stationarity constitutes a core pre-requisite within the modelling process on JP networks …