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Usman A. Khan

4 accepted papers

2021

A Decentralized Variance-Reduced Method for Stochastic Optimization Over Directed Graphs

ICASSP 2021accepted

In this paper, we propose a decentralized first-order stochastic optimization method Push-SAGA for finite-sum minimization over a strongly connected directed graph. This method features local variance reduction to remove the uncertainty caused by random sampling of the local gradients, global gradie…

Cited by 4SourceScholar
2016

Measurement partitioning and observational equivalence in state estimation

ICASSP 2016accepted

This paper studies observability of linear systems from both algebraic and graph-theoretic arguments, and further draws a parallel between the two. We show that a set of critical measurements (for state-space observability) can be partitioned into two types: α and β. This partitioning is driven by d…

Cited by 13SourceScholar