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- W1968366558 abstract "This paper develops a probabilistic two-dimensional (2D) inversion for geoacoustic seabed and water-column parameters in a strongly range-dependent environment. Range-dependent environments in shelf and shelf-break regions are of increasing importance to the acoustical-oceanography community, and recent advances in nonlinear inverse theory and sampling methods are applied here for efficient probabilistic inversion in 2D. The 2D seabed and water column are parameterized by highly efficient, self-adapting irregular grids which match the local resolving power of the data and provide parsimonious solutions requiring few parameters to capture complex environments. The self-adapting parameterization in the water-column and seabed is achieved by implementing the irregular grid as a trans-dimensional hierarchical Bayesian model which is sampled with the Metropolis-Hastings-Green algorithm. To improve sampling, population Monte Carlo is applied with a large number of interacting parallel Markov chains employing a load balancing algorithm on a computer cluster. The inversion is applied to simulated data for a vertical line array and several source locations to several kilometers range. Complex pressure fields are computed using a parabolic equation model and results are considered in terms of 2D ensemble parameter estimates and marginal uncertainty distributions. [Supported by NSERC]" @default.
- W1968366558 created "2016-06-24" @default.
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- W1968366558 date "2013-01-01" @default.
- W1968366558 modified "2023-10-12" @default.
- W1968366558 title "Probabilistic two dimensional joint water-column and seabed inversion" @default.
- W1968366558 doi "https://doi.org/10.1121/1.4800601" @default.
- W1968366558 hasPublicationYear "2013" @default.
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