no code implementations • 14 Feb 2023 • Seo Taek Kong, Saptarshi Mandal, Dimitrios Katselis, R. Srikant
After separating tasks by type, any Dawid-Skene algorithm (i. e., any algorithm designed for the Dawid-Skene model) can be applied independently to each type to infer the truth values.
no code implementations • 17 Oct 2020 • Xiaotian Xie, Dimitrios Katselis, Carolyn L. Beck, R. Srikant
Incoming edges to a node in the graph indicate that the state of the node at a particular time instant is influenced by the states of the corresponding parental nodes in the previous time instant.
no code implementations • 19 Dec 2016 • Dimitrios Katselis, Carolyn L. Beck, R. Srikant
For a network with $p$ nodes, where each node has in-degree at most $d$ and corresponds to a scalar Bernoulli process generated by a BAR, we provide a greedy algorithm that can efficiently learn the structure of the underlying directed graph with a sample complexity proportional to the mixing time of the BAR process.
no code implementations • 5 Aug 2015 • Rodrigo Carvajal, Juan C. Agüero, Boris I. Godoy, Dimitrios Katselis
In this paper, Bayesian parameter estimation through the consideration of the Maximum A Posteriori (MAP) criterion is revisited under the prism of the Expectation-Maximization (EM) algorithm.
no code implementations • 26 Jul 2015 • Dimitrios Katselis, Cristian R. Rojas, Carolyn L. Beck
The separation of the system estimator from the experiment design is done within this new framework by choosing and fixing the estimation method to either a maximum likelihood (ML) approach or a Bayesian estimator such as the minimum mean square error (MMSE).