Search Results for author: Thanh V. Nguyen

Found 11 papers, 3 papers with code

Implicit Regularization for Group Sparsity

1 code implementation29 Jan 2023 Jiangyuan Li, Thanh V. Nguyen, Chinmay Hegde, Raymond K. W. Wong

We study the implicit regularization of gradient descent towards structured sparsity via a novel neural reparameterization, which we call a diagonally grouped linear neural network.

regression

Provable Compressed Sensing with Generative Priors via Langevin Dynamics

no code implementations25 Feb 2021 Thanh V. Nguyen, Gauri Jagatap, Chinmay Hegde

Deep generative models have emerged as a powerful class of priors for signals in various inverse problems such as compressed sensing, phase retrieval and super-resolution.

Retrieval Super-Resolution

Active learning of deep surrogates for PDEs: Application to metasurface design

no code implementations24 Aug 2020 Raphaël Pestourie, Youssef Mroueh, Thanh V. Nguyen, Payel Das, Steven G. Johnson

Surrogate models for partial-differential equations are widely used in the design of meta-materials to rapidly evaluate the behavior of composable components.

Active Learning

Learning Robust Models for e-Commerce Product Search

no code implementations ACL 2020 Thanh V. Nguyen, Nikhil Rao, Karthik Subbian

Showing items that do not match search query intent degrades customer experience in e-commerce.

counterfactual

Benefits of Jointly Training Autoencoders: An Improved Neural Tangent Kernel Analysis

no code implementations27 Nov 2019 Thanh V. Nguyen, Raymond K. W. Wong, Chinmay Hegde

Starting from a randomly initialized autoencoder network, we rigorously prove the linear convergence of gradient descent in two learning regimes, namely: (i) the weakly-trained regime where only the encoder is trained, and (ii) the jointly-trained regime where both the encoder and the decoder are trained.

Autoencoders Learn Generative Linear Models

no code implementations2 Jun 2018 Thanh V. Nguyen, Raymond K. W. Wong, Chinmay Hegde

For each of these models, we prove that under suitable choices of hyperparameters, architectures, and initialization, autoencoders learned by gradient descent can successfully recover the parameters of the corresponding model.

On Learning Sparsely Used Dictionaries from Incomplete Samples

no code implementations ICML 2018 Thanh V. Nguyen, Akshay Soni, Chinmay Hegde

Second, we propose an initialization algorithm that utilizes a small number of extra fully observed samples to produce such a coarse initial estimate.

Dictionary Learning

A Forward-Backward Approach for Visualizing Information Flow in Deep Networks

no code implementations16 Nov 2017 Aditya Balu, Thanh V. Nguyen, Apurva Kokate, Chinmay Hegde, Soumik Sarkar

We introduce a new, systematic framework for visualizing information flow in deep networks.

Provably Accurate Double-Sparse Coding

1 code implementation9 Nov 2017 Thanh V. Nguyen, Raymond K. W. Wong, Chinmay Hegde

To our knowledge, our work introduces the first computationally efficient algorithm for double-sparse coding that enjoys rigorous statistical guarantees.

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