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.
Results
Showing 1 to 8 of 8 for “"frequency filtering"”.
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Digital noise reconstruction with a quantum sensor
… systems rely on using approximated delta-like frequency filtering to sample the noise spectrum in frequency domain using dynamical decoupling sequences. In this thesis, we propose a novel digital noise reconstruction method to reconstruct the environmental noise both in frequency and time …
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A seismic reflection study over the Bane anticline in Giles County, Virginia
… Eleven seismograms were obtained. In addition to frequency filtering, velocity filtering, and deconvolution, new methods of interpreting RMS velocity analyses were developed and applied. Persistent events at about 1.0 and 2.8 seconds were found, suggesting the presence of large reflection …
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Study of propagation and detection methods of terahertz radiation for spectroscopy and imaging
… power and the spatial resolution in particular frequency components. For continued development in THz radiation imaging, a comprehensive understanding of the role of these factors on THz radiation propagation and detection is vital. This dissertation focuses on the various aspects like …
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Towards a unified account of face (and maybe object) processing
… such as inversion, contrast reversal and spatial frequency filtering, but how or why is unclear. Most importantly, we do not understand even the basic mechanisms of face processing. We hypothesize that what makes face processing distinctive is the existence of large, coarse face templates. We test …
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Differences in image properties across facial expressions: effects on perceived contrast, stimulus efficacy and oculomotor responses
… expressions are driven by their low spatial frequency content. Unaddressed by this account, however, is the extent that expressions of fear compared to other faces differ in terms of the statistical image properties that define facial stimuli (their Fourier amplitude spectra), and the extent …
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Applications of the Radon transform, Stratigraphic filtering, and Object-based stochastic reservoir modeling
The focus of this research is to develop and extend the application of existing technologies to enhance seismic reservoir characterization. The chapters presented in this dissertation constitute five individual studies consisting of three applications of the Radon transform, one aspect of acoustic …
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Atmospheric responses to flare generated sunquakes
… clearly visible in both AIA passbands, after frequency filtering was applied to the data. The first signature of a response is detected at distances of 5.2 Mm to 25.7 Mm from the flare ribbon. Time-distance analysis was used to calculate apparent transverse velocities with maxima as high as 41 …
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Investigating Mesoscale, Submesoscale, and Mixing Ocean Dynamics in the Mozambique Channel Using Seismic and Simulation Datasets
… strategy was applied to seismic sections: frequency filtering, seabed muting, direct wave removal, and f-k filtering, followed by velocity analysis, amplitude correction, stacking and deconvolution. Detailed images of phenomena including anticyclonic and cyclonic eddy distortions, …