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- W1577112154 abstract "It is well known that in the scattering of elastic waves from localized inhomogeneities the scattering amplitudezA is proportional to the square of the frequency win the Rayleigh {long wavelength) regime, i.e., A= A?w + ... This talk deals with the problem of {1) extracting A from experimental scattering data, {2) calculating A? for an assumed scatterer and {3) deducing the p~bperties of the scatterer from a set of values of A measured for various transducer configurations. A review of experimental and theoretical results for~?. will be presented for the case.of spheroidal voids and the remaining discrepancies between the two kinas of results will be discussed. The inverse problem {i.e., deducing the scatterer properties from the scattering measurements) will be discussed in detail. The probabilistic inverse problem, which provides the appropriate framework for the interpretation of real data, will be covered at greater length. In the case in which it is assumed that the scatterer is an ellipsoid void, those size, shape and orientation are unknown~ priori, a number of computational results involving best estimates and associated measures of significance will be given. Analogous results will be derived for parameters related to fracture mechanics." @default.
- W1577112154 created "2016-06-24" @default.
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- W1577112154 date "1979-01-01" @default.
- W1577112154 modified "2023-09-23" @default.
- W1577112154 title "Direct and Inverse Problems Pertaining to the Scattering of Elastic Waves in the Rayleigh (Long Wavelength) Regime" @default.
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