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 3 of 3 for “"Approximate Fourier"”.
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Wavelets for approximate Fourier transform and data compression
… the first part, we develop a wavelet-based fast approximate Fourier transform algorithm. The second part is devoted to the developments of several wavelet-based data compression techniques for image and seismic data. We propose an algorithm that uses the discrete wavelet transform (DWT) as a tool …
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Improved Gaussian process approximations for spatial and flow fields
… in different settings. Firstly, I consider approximate learning of low dimensional spatial fields. In Chapter 2, I argue for precomputable variational approximations, which only access the training data once during learning. These lead to significant computational savings, but are limited to …
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Interferometric Methods
Future radio telescopes promise great advances in resolution and sensitivity. These include the Square Kilometer Array, a two array instrument, in South Africa and Australia. Similarly, the next generation Very Large Array (ngVLA) is being designed for construction in North America. These arrays …