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 6 of 6 for “"Frequency of the wave"”.
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Frequency-scale effect in elastic periodic muti-layered media
… a reservoir is formed by laminated layers of shale, sand, and other types of lithologies. Each layer has different elastic properties that are described by its own stiffness tensor, density, and thickness. A periodic medium is defined as the stack of homogeneous layers with different …
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Optimal control of wave-induced vibrations in semisubmersible structures with flexible superstructures
This dissertation is concerned with controlling the motion of a semisubmersible structure induced by high-frequency waves. The structure consists of a rigid platform and a flexible superstructure. Motion of a structure in fluids generates forces depending on the motion itself. The added mass and …
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Surface acoustic wave probes for chemical analysis
Surface Acoustic Wave delay lines have been used as probes for chemical analysis. The interaction between matter adjacent to the SAW device surface and the propagating Raleigh wave caused measurable changes in the amplitude, phase and resonant frequency of the wave. The effectiveness of various …
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On the paradox of convectively-coupled waves
This thesis investigates the forced response of waves on a linearized, shallow water beta-plane in an attempt to develop some gross understanding of the properties of convectively coupled waves. Two concepts are central to this new theory: (i) a convectively coupled wave is a forced wave; (ii) a …
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Laboratory measurements of the sound generated by breaking waves
Breaking waves dissipate energy, transfer momentum from the wind to surface currents and breaking enhances the transfer of gas and mass across the air-sea interface. Breaking waves are believed to be the dominant source of sea surface sound at frequencies greater than 500 Hz and the presence of …
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Approximation of wave packets on the whole real line
In this thesis we compare six different orthonormal systems in L₂(R) which can be used in the construction of a spectral method for solving the semi-classically scaled time dependent linear Schrödinger equation (TDSE) on the real line. All bases have banded skew-symmetric (or skew-Hermitian) …