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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 0Source ↗Scholar ↗
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 0Source ↗Scholar ↗