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 4 of 4 for “"Wave scattering and diffraction"”.
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Road traffic noise barrier design : measurements and models concerning multiple-walls and augmented earth mounds
… the use of multiple-walls on the ground and on top of earth mound type barriers.</p> <p>As part of this research, a comprehensive up-to-date review of the research carried out on noise barriers was undertaken. A number of areas requiring further research were identified. The discussion of …
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Imaging Resolution of the 410-km and 660-km Discontinuities
… discontinuities at depths of about 410 km and 660 km provides important constraints on mantle convection as the associated mineral phase transformations in the transition zone are sensitive to thermal perturbations. Teleseismic P-to-S receiver functions have been widely used to map the …
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Wavefront Healing and Tomographic Resolution of Mantle Plumes
… of the anti-correlation between bulk sound speed and S wave speed imaged in the lowermost mantle, we use a Spectral Element Method (SEM) to simulate global seismic wave propagation in 3-D wavespeed models and measure frequency-dependent P-, S-, Pdiff- and Sdiff-wave traveltime anomalies caused by …
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Detection and Kirchhoff-type migration of seismic events by use of a new characteristic function
… localization is based on the picking of body wave arrivals, ray tracing and inversion of travel time data. Travel time picks with small uncertainties are required to produce reliable and accurate results with this kind of source localization. Hence recordings, with a low Signal-to-Noise Ratio …