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MyJournals.org - Science - 'Algorithms, Vol. 16, Pages 245: Consensus Big Data Clustering for Bayesian Mixture Models' (Algorithms)

MyJournals.org - Science - Algorithms, Vol. 16, Pages 245: Consensus Big Data Clustering for Bayesian Mixture Models (Algorithms) ....

Monte Carlo ,

"Emulation of greenhouse-gas sensitivities using variational autoencode" by Laura Cartwright, Andrew Zammit-Mangion et al.

Flux inversion is the process by which sources and sinks of a gas are identified from observations of gas mole fraction. The inversion often involves running a Lagrangian particle dispersion model (LPDM) to generate simulations of the gas movement over a domain of interest. The LPDM must be run backward in time for every gas measurement, and this can be computationally prohibitive. To address this problem, here we develop a novel spatio-temporal emulator for LPDM sensitivities that is built using a convolutional variational autoencoder (CVAE, a two-piece neural network capable of condensing and reconstructing images). With the encoder segment of the CVAE, we obtain approximate (variational) posterior distributions over latent variables in a low-dimensional space. We then use a spatio-temporal Gaussian process emulator on the low-dimensional space to emulate new variables at prediction locations and time points. Emulated variables are then passed through the decoder segment of the CVAE ....

Environmental Statistics , Lux Inversion , Gaussian Process , Agrangian Particle Dispersion Modeling , Machine Learning ,