Multisubject Task-Related fMRI Data Processing via a Two-Stage Generalized Canonical Correlation Analysis

no code implementations • 16 Oct 2022 • Paris A. Karakasis, Athanasios P. Liavas, Nicholas D. Sidiropoulos, Panagiotis G. Simos, Efrosini Papadaki

Task-related fMRI data processing aims to determine which brain areas are activated when a specific task is performed and is usually based on the Blood Oxygen Level Dependent (BOLD) signal.

An Accelerated Stochastic Gradient for Canonical Polyadic Decomposition

no code implementations • 28 Sep 2021 • Ioanna Siaminou, Athanasios P. Liavas

We consider the problem of structured canonical polyadic decomposition.

Accelerated Stochastic Gradient for Nonnegative Tensor Completion and Parallel Implementation

no code implementations • 20 Sep 2021 • Ioanna Siaminou, Ioannis Marios Papagiannakos, Christos Kolomvakis, Athanasios P. Liavas

We consider the problem of nonnegative tensor completion.

Matrix Completion

A Flexible and Efficient Algorithmic Framework for Constrained Matrix and Tensor Factorization

no code implementations • 13 Jun 2015 • Kejun Huang, Nicholas D. Sidiropoulos, Athanasios P. Liavas

We propose a general algorithmic framework for constrained matrix and tensor factorization, which is widely used in signal processing and machine learning.

Dictionary Learning