Search Results for author: José Henrique de Morais Goulart

Found 7 papers, 1 papers with code

Performance Gaps in Multi-view Clustering under the Nested Matrix-Tensor Model

1 code implementation16 Feb 2024 Hugo Lebeau, Mohamed El Amine Seddik, José Henrique de Morais Goulart

We study the estimation of a planted signal hidden in a recently introduced nested matrix-tensor model, which is an extension of the classical spiked rank-one tensor model, motivated by multi-view clustering.

Clustering

On the Accuracy of Hotelling-Type Asymmetric Tensor Deflation: A Random Tensor Analysis

no code implementations28 Oct 2023 Mohamed El Amine Seddik, Maxime Guillaud, Alexis Decurninge, José Henrique de Morais Goulart

This work introduces an asymptotic study of Hotelling-type tensor deflation in the presence of noise, in the regime of large tensor dimensions.

Hotelling Deflation on Large Symmetric Spiked Tensors

no code implementations20 Apr 2023 Mohamed El Amine Seddik, José Henrique de Morais Goulart, Maxime Guillaud

This paper studies the deflation algorithm when applied to estimate a low-rank symmetric spike contained in a large tensor corrupted by additive Gaussian noise.

Majorization-minimization for Sparse Nonnegative Matrix Factorization with the $β$-divergence

no code implementations13 Jul 2022 Arthur Marmin, José Henrique de Morais Goulart, Cédric Févotte

It is well known that the norm of the other factor (the dictionary matrix) needs to be controlled in order to avoid an ill-posed formulation.

A Random Matrix Perspective on Random Tensors

no code implementations2 Aug 2021 José Henrique de Morais Goulart, Romain Couillet, Pierre Comon

A numerical verification provides evidence that the same holds for orders 4 and 5, leading us to conjecture that, for any order, our fixed-point equation is equivalent to the known characterization of the ML estimation performance that had been obtained by relying on spin glasses.

Community Detection

On the Realization of Impulse Invariant Bilinear Volterra Kernels

no code implementations12 Jul 2021 Phillip M. S. Burt, José Henrique de Morais Goulart

As previously shown, the direct extension of the impulse invariance principle to Volterra kernels has to be modified in order to provide a condition for the exact modeling of mixed-signal chains.

Joint Majorization-Minimization for Nonnegative Matrix Factorization with the $β$-divergence

no code implementations29 Jun 2021 Arthur Marmin, José Henrique de Morais Goulart, Cédric Févotte

Our new updates are derived from a joint majorization-minimization (MM) scheme, in which an auxiliary function (a tight upper bound of the objective function) is built for the two factors jointly and minimized at each iteration.

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