Search Results for author: Le Thi Khanh Hien

Found 13 papers, 7 papers with code

Block Majorization Minimization with Extrapolation and Application to $β$-NMF

1 code implementation12 Jan 2024 Le Thi Khanh Hien, Valentin Leplat, Nicolas Gillis

We propose a Block Majorization Minimization method with Extrapolation (BMMe) for solving a class of multi-convex optimization problems.

Deep Nonnegative Matrix Factorization with Beta Divergences

2 code implementations15 Sep 2023 Valentin Leplat, Le Thi Khanh Hien, Akwum Onwunta, Nicolas Gillis

Deep Nonnegative Matrix Factorization (deep NMF) has recently emerged as a valuable technique for extracting multiple layers of features across different scales.

Anomaly detection with semi-supervised classification based on risk estimators

no code implementations1 Sep 2023 Le Thi Khanh Hien, Sukanya Patra, Souhaib Ben Taieb

A significant limitation of one-class classification anomaly detection methods is their reliance on the assumption that unlabeled training data only contains normal instances.

One-Class Classification

Multiblock ADMM for nonsmooth nonconvex optimization with nonlinear coupling constraints

no code implementations19 Jan 2022 Le Thi Khanh Hien, Dimitri Papadimitriou

This paper proposes a multiblock alternating direction method of multipliers for solving a class of multiblock nonsmooth nonconvex optimization problem with nonlinear coupling constraints.

Block Alternating Bregman Majorization Minimization with Extrapolation

1 code implementation9 Jul 2021 Le Thi Khanh Hien, Duy Nhat Phan, Nicolas Gillis, Masoud Ahookhosh, Panagiotis Patrinos

In this paper, we consider a class of nonsmooth nonconvex optimization problems whose objective is the sum of a block relative smooth function and a proper and lower semicontinuous block separable function.

A Framework of Inertial Alternating Direction Method of Multipliers for Non-Convex Non-Smooth Optimization

1 code implementation10 Feb 2021 Le Thi Khanh Hien, Duy Nhat Phan, Nicolas Gillis

In this paper, we propose an algorithmic framework, dubbed inertial alternating direction methods of multipliers (iADMM), for solving a class of nonconvex nonsmooth multiblock composite optimization problems with linear constraints.

An Inertial Block Majorization Minimization Framework for Nonsmooth Nonconvex Optimization

1 code implementation23 Oct 2020 Le Thi Khanh Hien, Duy Nhat Phan, Nicolas Gillis

In this paper, we introduce TITAN, a novel inerTIal block majorizaTion minimizAtioN framework for non-smooth non-convex optimization problems.

Matrix Completion

Algorithms for Nonnegative Matrix Factorization with the Kullback-Leibler Divergence

1 code implementation5 Oct 2020 Le Thi Khanh Hien, Nicolas Gillis

Nonnegative matrix factorization (NMF) is a standard linear dimensionality reduction technique for nonnegative data sets.

Dimensionality Reduction

Accelerating Block Coordinate Descent for Nonnegative Tensor Factorization

no code implementations13 Jan 2020 Andersen Man Shun Ang, Jeremy E. Cohen, Nicolas Gillis, Le Thi Khanh Hien

This paper is concerned with improving the empirical convergence speed of block-coordinate descent algorithms for approximate nonnegative tensor factorization (NTF).

Multi-block Bregman proximal alternating linearized minimization and its application to orthogonal nonnegative matrix factorization

1 code implementation4 Aug 2019 Masoud Ahookhosh, Le Thi Khanh Hien, Nicolas Gillis, Panagiotis Patrinos

We introduce and analyze BPALM and A-BPALM, two multi-block proximal alternating linearized minimization algorithms using Bregman distances for solving structured nonconvex problems.

Optimization and Control Numerical Analysis Numerical Analysis

Inertial Block Proximal Methods for Non-Convex Non-Smooth Optimization

no code implementations ICML 2020 Le Thi Khanh Hien, Nicolas Gillis, Panagiotis Patrinos

We propose inertial versions of block coordinate descent methods for solving non-convex non-smooth composite optimization problems.

Distributionally Robust and Multi-Objective Nonnegative Matrix Factorization

no code implementations30 Jan 2019 Nicolas Gillis, Le Thi Khanh Hien, Valentin Leplat, Vincent Y. F. Tan

We propose to use Lagrange duality to judiciously optimize for a set of weights to be used within the framework of the weighted-sum approach, that is, we minimize a single objective function which is a weighted sum of the all objective functions.

Dimensionality Reduction

Accelerated Randomized Mirror Descent Algorithms For Composite Non-strongly Convex Optimization

no code implementations23 May 2016 Le Thi Khanh Hien, Cuong V. Nguyen, Huan Xu, Can-Yi Lu, Jiashi Feng

Avoiding this devise, we propose an accelerated randomized mirror descent method for solving this problem without the strongly convex assumption.

Cannot find the paper you are looking for? You can Submit a new open access paper.