Search Results for author: Dawen Liang

Found 14 papers, 6 papers with code

A Generative Product-of-Filters Model of Audio

1 code implementation20 Dec 2013 Dawen Liang, Matthew D. Hoffman, Gautham J. Mysore

We propose the product-of-filters (PoF) model, a generative model that decomposes audio spectra as sparse linear combinations of "filters" in the log-spectral domain.

Speaker Identification

On the challenges of learning with inference networks on sparse, high-dimensional data

1 code implementation17 Oct 2017 Rahul G. Krishnan, Dawen Liang, Matthew Hoffman

We study parameter estimation in Nonlinear Factor Analysis (NFA) where the generative model is parameterized by a deep neural network.

Variational Inference

Variational Autoencoders for Collaborative Filtering

18 code implementations16 Feb 2018 Dawen Liang, Rahul G. Krishnan, Matthew D. Hoffman, Tony Jebara

This non-linear probabilistic model enables us to go beyond the limited modeling capacity of linear factor models which still largely dominate collaborative filtering research. We introduce a generative model with multinomial likelihood and use Bayesian inference for parameter estimation.

Bayesian Inference Collaborative Filtering +2

The Deconfounded Recommender: A Causal Inference Approach to Recommendation

no code implementations20 Aug 2018 Yixin Wang, Dawen Liang, Laurent Charlin, David M. Blei

To this end, we develop a causal approach to recommendation, one where watching a movie is a "treatment" and a user's rating is an "outcome."

Causal Inference Recommendation Systems

Correlated Variational Auto-Encoders

2 code implementations ICLR Workshop DeepGenStruct 2019 Da Tang, Dawen Liang, Tony Jebara, Nicholas Ruozzi

Variational Auto-Encoders (VAEs) are capable of learning latent representations for high dimensional data.

Clustering Link Prediction

Learning Correlated Latent Representations with Adaptive Priors

no code implementations14 Jun 2019 Da Tang, Dawen Liang, Nicholas Ruozzi, Tony Jebara

Variational Auto-Encoders (VAEs) have been widely applied for learning compact, low-dimensional latent representations of high-dimensional data.

Clustering Link Prediction

Local Policy Improvement for Recommender Systems

no code implementations22 Dec 2022 Dawen Liang, Nikos Vlassis

The conventional way to address this problem is through importance sampling correction, but this comes with practical limitations.

Causal Inference Self-Supervised Learning +1

Large Language Models as Zero-Shot Conversational Recommenders

1 code implementation19 Aug 2023 Zhankui He, Zhouhang Xie, Rahul Jha, Harald Steck, Dawen Liang, Yesu Feng, Bodhisattwa Prasad Majumder, Nathan Kallus, Julian McAuley

In this paper, we present empirical studies on conversational recommendation tasks using representative large language models in a zero-shot setting with three primary contributions.

Risk-Sensitive RL with Optimized Certainty Equivalents via Reduction to Standard RL

no code implementations10 Mar 2024 Kaiwen Wang, Dawen Liang, Nathan Kallus, Wen Sun

We study Risk-Sensitive Reinforcement Learning (RSRL) with the Optimized Certainty Equivalent (OCE) risk, which generalizes Conditional Value-at-risk (CVaR), entropic risk and Markowitz's mean-variance.

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