Athanasios A. Rontogiannis — accepted AI-conference papers

2021

Rank-Revealing Block-Term Decomposition for Tensor Completion

Athanasios A. Rontogiannis, Paris V. Giampouras, Eleftherios Kofidis

ICASSP 2021accepted

The so-called block-term decomposition (BTD) tensor model has been recently receiving increasing attention due to its enhanced ability of representing systems and signals that are composed of blocks of rank higher than one, a scenario encountered in numerous and diverse applications. In this paper,…

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2019

A Projected Newton-type Algorithm for Nonnegative Matrix Factorization with Model Order Selection

Paris V. Giampouras, Athanasios A. Rontogiannis, Konstantinos D. Koutroumbas

ICASSP 2019accepted

Nonnegative matrix factorization (NMF) has attracted considerable attention over the past few years as is met in many modern machine learning applications. NMF presents some inherent challenges when it comes both to its theoretical understanding and the task of devising efficient algorithmic tools.…

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