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 9 of 9 for “"Geoacoustic inversion"”.
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Geoacoustic inversion by mode amplitude perturbation
… introduces an algorithm for inverting for the geoacoustic properties of the seafloor in shallow water. The input data required by the algorithm are estimates of the amplitudes of the normal modes excited by a low-frequency pure-tone sound source, and estimates of the water column sound speed …
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Geoacoustic inversion by mode amplitude perturbation
… introduces an algorithm for inverting for the geoacoustic properties of the seafloor in shallow water. The input data required by the algorithm are estimates of the amplitudes of the normal modes excited by a low-frequency pure-tone sound source, and estimates of the water column sound speed …
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Optimization for source localization and geoacoustic inversion in underwater acoustics
Matched-field inversion techniques are widely used for source localization and geoacoustic parameter estimation. These inversion methods correlate the received data with modeled data and find the model parameters which provide the maximum correlation. However, when a large number of unknown …
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Deep learning framework for solving geoacoustic inversion problems using normal mode theory
Geoacoustic inversion, the process of estimating seafloor properties from acoustic measurements, is crucial for applications ranging from sonar performance prediction to environmental monitoring. However, traditional inversion methods are often computationally intensive, limiting real-time analysis …
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Geoacoustic inversion in laterally varying shallow-water environments using high-resolution wavenumber estimation
… necessary to obtain reliable estimates of bottom geoacoustic properties that can be used in acoustic propagation codes. In this thesis, perturbative inversion methods and exact inverse methods are discussed as a means for inferring geoacoustic properties of the bottom. For each of these methods, …
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Geoacoustic inversion in laterally varying shallow-water experiments using high-resolution wavenumber estimation
… necessary to obtain reliable estimates of bottom geoacoustic properties that can be used in acoustic propagation codes. In this thesis, perturbative inversion methods and exact inverse methods are discussed as a means for inferring geoacoustic properties of the bottom. For each of these methods, …
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Sub-bottom profiling using an Autonomous Underwater Vehicle equipped with a sound source and towed hydrophone array
… layer thickness of the seabed through Bayesian geoacoustic inversion. This method provides range-dependent geoacoustic parameters with a resolution on the order of 10 meters. Numerical studies indicate that, for timing data with low variance, arrival times can be used to accurately estimate …
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Sub-Bottom Profiling Using an Autonomous Underwater Vehicle Equipped With a Sound Source and Towed Hydrophone Array
… layer thickness of the seabed through Bayesian geoacoustic inversion. This method provides range-dependent geoacoustic parameters with a resolution on the order of 10 meters. Numerical studies indicate that, for timing data with low variance, arrival times can be used to accurately estimate …
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Advances in Symbolic Regression: From Generalized Formulation to Density Estimation and Inverse Problem
… inverse kinematics problem, and notably, a geoacoustic inversion problem in oceanography aimed at inferring posterior distributions of underlying seabed parameters from acoustic signals. The diverse findings of this thesis not only contribute to advancing the field of Symbolic Regression, …