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Efficient inversion methods in under...

Ma, Xiaoqun.

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Efficient inversion methods in underwater acoustics.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Efficient inversion methods in underwater acoustics./
Author:	Ma, Xiaoqun.
Description:	92 p.
Notes:	Adviser: Zoi-Heleni Michalopoulou.
Contained By:	Dissertation Abstracts International62-10B.
Subject:	Mathematics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3029211
ISBN:	0493415041

Efficient inversion methods in underwater acoustics.
Ma, Xiaoqun.

Efficient inversion methods in underwater acoustics. - 92 p.

Adviser: Zoi-Heleni Michalopoulou.

Thesis (Ph.D.)--New Jersey Institute of Technology, 2001.

This dissertation describes efficient methods developed and implemented for source localization and sound speed and bottom depth estimation using sound propagation in the ocean. The proposed inversion techniques are based on the linearization of the generally non-linear inverse problem of parameter estimation in underwater acoustics. These techniques take into account properties of the ocean environment and are accurate in their estimation results without being prohibitively computationally intensive. For the inversion, select ray paths are taken into account: the direct, first surface bounce, and first bottom bounce. Ray travel time derivatives with respect to parameters that affect path arrival times are obtained analytically. These derivatives and a first order expansion are then used to find estimates of unknown parameters through replica and true paths; replica paths are generated using ray theory for underwater sound propagation and true paths are identified from measured time series. The linearization scheme works efficiently for the estimation of geometric parameters such as the source and receiver location coordinates and the depth of the water column. It is also successful in estimating the sound speed profile in the ocean using empirical orthogonal functions. In this work, the linearization inversion technique is applied to marine mammal tracking, and it is also used with real data collected during the Haro Strait experiment for source and receiver localization. For the Haro Strait data, inversion using linearization is also compared to matched-field processing, which estimates source location and geoacoustic parameters through a full field matching approach.

ISBN: 0493415041Subjects--Topical Terms:

515831
Mathematics.

Efficient inversion methods in underwater acoustics.
LDR:02581nam 2200277 a 45 001 931400
005 20110429
008 110429s2001 eng d
020 $a 0493415041
035 $a (UnM)AAI3029211
035 $a AAI3029211
040 $a UnM $c UnM
100 1 $a Ma, Xiaoqun. $3 1254942
245 1 0 $a Efficient inversion methods in underwater acoustics.
300 $a 92 p.
500 $a Adviser: Zoi-Heleni Michalopoulou.
500 $a Source: Dissertation Abstracts International, Volume: 62-10, Section: B, page: 4580.
502 $a Thesis (Ph.D.)--New Jersey Institute of Technology, 2001.
520 $a This dissertation describes efficient methods developed and implemented for source localization and sound speed and bottom depth estimation using sound propagation in the ocean. The proposed inversion techniques are based on the linearization of the generally non-linear inverse problem of parameter estimation in underwater acoustics. These techniques take into account properties of the ocean environment and are accurate in their estimation results without being prohibitively computationally intensive. For the inversion, select ray paths are taken into account: the direct, first surface bounce, and first bottom bounce. Ray travel time derivatives with respect to parameters that affect path arrival times are obtained analytically. These derivatives and a first order expansion are then used to find estimates of unknown parameters through replica and true paths; replica paths are generated using ray theory for underwater sound propagation and true paths are identified from measured time series. The linearization scheme works efficiently for the estimation of geometric parameters such as the source and receiver location coordinates and the depth of the water column. It is also successful in estimating the sound speed profile in the ocean using empirical orthogonal functions. In this work, the linearization inversion technique is applied to marine mammal tracking, and it is also used with real data collected during the Haro Strait experiment for source and receiver localization. For the Haro Strait data, inversion using linearization is also compared to matched-field processing, which estimates source location and geoacoustic parameters through a full field matching approach.
590 $a School code: 0152.
650 4 $a Mathematics. $3 515831
650 4 $a Physics, Acoustics. $3 1019086
690 $a 0405
690 $a 0986
710 2 0 $a New Jersey Institute of Technology. $3 1028843
773 0 $t Dissertation Abstracts International $g 62-10B.
790 $a 0152
790 1 0 $a Michalopoulou, Zoi-Heleni, $e advisor
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3029211