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| Titel |
Stochastic formalism-based seafloor feature discrimination using multifractality of time-dependent acoustic backscatter |
| VerfasserIn |
K. Haris, B. Chakraborty |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 21, no. 1 ; Nr. 21, no. 1 (2014-01-10), S.101-113 |
| Datensatznummer |
250120877
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| Publikation (Nr.) |
 copernicus.org/npg-21-101-2014.pdf |
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| Zusammenfassung |
| Dual-frequency echo-envelope data acquired using the normal-incidence
single-beam echosounder system (SBES) have been examined to study its scale
invariant properties. The scaling and multifractality of the SBES echo
envelopes (at 33 and 210 kHz) were validated by applying a stochastic-based
multifractal analysis technique. The analyses carried out substantiate the
hierarchy of multiplicative cascade dynamics in the echo envelopes,
demonstrating a first-order multifractal phase transition. The resulting
scale invariant parameters (α, C1, and H) establish gainful
information that can facilitate distinctive delineation of the sediment
provinces in the central part of the western continental shelf of India. The
universal multifractal parameters among the coarse and fine sediments exhibit
subtle difference in α and H, whereas the codimension parameter
C1 representing the sparseness of the data varies. The C1 values are
well clustered at both the acoustic frequencies, demarcating the coarse and
fine sediment provinces. Statistically significant correlations are
noticeable between the computed C1 values and the ground truth sediment
information. The variations in the multifractal parameters and their behavior
with respect to the ground truth sediment information are in good
corroboration with the previously estimated sediment geoacoustic inversion
results obtained at the same locations. |
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