Alessandra Guglielmi, Mario Beraha
DMAT - Politecnico di Milano
Politecnico di Milano - online event organized via Microsoft Teams
September 21st, 2021
4.00 pm
Contacts:
Elisabetta Di Nitto
Research Line:
Advanced software architectures and methodologies
Sommario
On September 21st, 2021 at 4.00 pm, within the context of the DataCloud activities, Proff. Alessandra Guglielmi and Mario Beraha of DMAT Department - Politecnico di Milano, will hold the online seminar titled "High-dimensional MCMC algorithms for Bayesian models".In this talk we will introduce the Bayesian approach to inferential statistics and sketch Markov chain Monte Carlo (MCMC) algorithms, that are a class of simulation methods typically used to approximate integrals with respect to probability measures involved in posterior inferences. In general, Bayesian models consider a very large number of parameters, and hence MCMC algorithms with a highly dimensional parameter space need to be designed, with extremely large associated computational cost. As an illlustration we will consider some applications where the goal is (model-based) clustering the data. We use Bayesian mixture models and we will see that, in case of high-dimensional data, the corresponding MCMC algorithms are computationally very demanding.
The event will be held online by Microsoft Teams