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Bibliografie

Conference Paper (international conference)

Bayesian Estimation of Source Term of Atmospheric Radiation Release with Interval Prior

Tichý Ondřej, Šmídl Václav, Hofman Radek

: Proceedings of the 8th International Congress on Environmental Modelling and Software (iEMSs), p. 357-364

: The 8th International Congress on Environmental Modelling and Software (iEMSs), (Toulouse, FR, 10.07.2016-14.07.2016)

: 7F14287, GA MŠk

: Source term estimation, Variational Bayes inference, Gamma dose rate measurement, CVX optimization toolbox, Covariance matrix model

: http://library.utia.cas.cz/separaty/2016/AS/tichy-0460818.pdf

(eng): Detection of release of an atmospheric pollutant is a problem of interest in environmental sciences. We are concerned with estimation of unknown source term of the release. Formally, the problem is formulated as a linear model where measurements are explained using source-receptor-sensitivity matrix obtained from atmospheric transport model and source term vector which has to be estimated. Specifically, we estimate the release of radioactivity from measurements of gamma dose rate (GDR). The problem of isolation of activity of individual nuclides is poorly conditioned. We propose a probabilistic model with the prior information on intervals of nuclide ratios. The model parameters are estimated using the Variational Bayes method. The proposed algorithm is tested on simulated scenario with 16 nuclides and compared with state-of-the-art optimization approaches.

: BB