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Full-Text Articles in Physical Sciences and Mathematics
Advances In Seismic First-Arrival Tomography, David Paul Gaines
Advances In Seismic First-Arrival Tomography, David Paul Gaines
Doctoral Dissertations
Seismic first-arrival tomography is a technique currently experiencing a renaissance in popularity due to the simplicity of implementation and promising results for delineating a variety of subsurface targets. The purpose of this study is to investigate seismic first-arrival tomography in a variety of settings and applications, and thus to provide a solid framework for future work. The study largely consists of two separate themes, hydrogeophysics and low-velocity anomaly detection. Hydrogeophysics is an emerging field whereby measured geophysical properties are used as proxies for physical properties of the subsurface. This study represents one of the first high-resolution hydrogeophysical investigations in the …
Understanding Wavelet Analysis And Filters For Engineering Applications, Chethan Bangalore Parameswariah
Understanding Wavelet Analysis And Filters For Engineering Applications, Chethan Bangalore Parameswariah
Doctoral Dissertations
Wavelets are signal-processing tools that have been of interest due to their characteristics and properties. Clear understanding of wavelets and their properties are a key to successful applications. Many theoretical and application-oriented papers have been written. Yet the choice of a right wavelet for a given application is an ongoing quest that has not been satisfactorily answered. This research has successfully identified certain issues, and an effort has been made to provide an understanding of wavelets by studying the wavelet filters in terms of their pole-zero and magnitude-phase characteristics. The magnitude characteristics of these filters have flat responses in both …