Search Results for author: Ali Mohammad-Djafari

Found 3 papers, 0 papers with code

Dynamical System Identification, Model Selection and Model Uncertainty Quantification by Bayesian Inference

no code implementations30 Jan 2024 Robert K. Niven, Laurent Cordier, Ali Mohammad-Djafari, Markus Abel, Markus Quade

For multivariate Gaussian likelihood and prior distributions, the Bayesian formulation gives Gaussian posterior and evidence distributions, in which the numerator terms can be expressed in terms of the Mahalanobis distance or ``Gaussian norm'' $||\vy-\hat{\vy}||^2_{M^{-1}} = (\vy-\hat{\vy})^\top {M^{-1}} (\vy-\hat{\vy})$, where $\vy$ is a vector variable, $\hat{\vy}$ is its estimator and $M$ is the covariance matrix.

Bayesian Inference Model Selection +1

Deep Learning and Bayesian inference for Inverse Problems

no code implementations28 Aug 2023 Ali Mohammad-Djafari, Ning Chu, Li Wang, Liang Yu

However, accounting for the uncertainties, we need first understand the Bayesian Deep Learning and then, we can see how we can use them for inverse problems.

Bayesian Inference

A generalized multivariate Student-t mixture model for Bayesian classification and clustering of radar waveforms

no code implementations29 Jul 2017 Guillaume Revillon, Ali Mohammad-Djafari, Cyrille Enderli

The classification method focuses on the introduction of a new prior distribution for the model hyper-parameters that gives us the possibility to handle sensitivity of mixture models to initialization and to allow a less restrictive modeling of data.

Classification Clustering +1

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