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 “"pre-whitening"”.
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Validation of statistical methods used in task fMRI studies
… timing correction, registration to common space, pre-whitening, hemodynamic response function modelling and multiple comparison correction. As most of these methods were introduced when fMRI was in its infancy, and were initially validated only for small datasets, it is questionable whether the …
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Biologically inspired feature extraction for rotation and scale tolerant pattern analysis
… framework of non-uniform log-polar transform is presented. For the space invariant connectivity model characterized by Topelitz-Block-Toeplitz matrix, the overall network response is obtained without matrix inverse operations providing the connection matrix generating function is bound by unity. …
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Models and methods for computationally efficient analysis of large spatial and spatio-temporal data
… removing orthonormal transformation named "pre-whitening" is described. This transformation is based on a singular value decomposition and results in the removal of spatial structure from the data. Circulant embedding technique further simplifies the calculation of eigenvalues and …
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Contributions to Robust Adaptive Signal Processing with Application to Space-Time Adaptive Radar
… utilize assumptions in their derivation. The presence of adequate Gaussian and independent and identically distributed (i.i.d.) input data are central among such assumptions. However, classical processors have a tendency to suffer a degradation in performance when assumptions like these are …
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Blind separation of noisy multivariate data using second-order statistics
… of noisy instantaneous linear mixtures is presented and analyzed for the case where the signal order k and noise covariance GG-H are unknown. Only a data set X of dimension n > k and of sample size m is observed, where X = AP + GW. The quality of separation depends on source-observation …
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Requirements for the detection of atherosclerosis lesions in carotid arteries with SPECT
… using the output values of a 3D moving Non Pre-Whitening Matched Filter (30 mNPWMF) with the .Localization Receiver Operating Characteristics (LROC) paradigm. We simulated SPECT images of the neck using SimSPECT, our in-house analog Monte Carlo radiation transport code. We used 400 64x64 …
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Irradiance forecasting and dispatching central station photovoltaic power plants
… site is stripped of its periodicities using a pre-whitening process which involves parameterization of certain known atmospheric phenomena. The pre-whitened data series is considered stationary, although some non-stationarity might be introduced by the discontinuities in the data collection …