Search Results for author: Chih-Wei Hsu

Found 12 papers, 3 papers with code

DynaMITE-RL: A Dynamic Model for Improved Temporal Meta-Reinforcement Learning

no code implementations25 Feb 2024 Anthony Liang, Guy Tennenholtz, Chih-Wei Hsu, Yinlam Chow, Erdem Biyik, Craig Boutilier

We introduce DynaMITE-RL, a meta-reinforcement learning (meta-RL) approach to approximate inference in environments where the latent state evolves at varying rates.

Continuous Control Meta Reinforcement Learning

Preference Elicitation with Soft Attributes in Interactive Recommendation

no code implementations22 Oct 2023 Erdem Biyik, Fan Yao, Yinlam Chow, Alex Haig, Chih-Wei Hsu, Mohammad Ghavamzadeh, Craig Boutilier

Leveraging concept activation vectors for soft attribute semantics, we develop novel preference elicitation methods that can accommodate soft attributes and bring together both item and attribute-based preference elicitation.

Attribute Recommendation Systems

Factual and Personalized Recommendations using Language Models and Reinforcement Learning

no code implementations9 Oct 2023 Jihwan Jeong, Yinlam Chow, Guy Tennenholtz, Chih-Wei Hsu, Azamat Tulepbergenov, Mohammad Ghavamzadeh, Craig Boutilier

Recommender systems (RSs) play a central role in connecting users to content, products, and services, matching candidate items to users based on their preferences.

Language Modelling Recommendation Systems +1

Demystifying Embedding Spaces using Large Language Models

no code implementations6 Oct 2023 Guy Tennenholtz, Yinlam Chow, Chih-Wei Hsu, Jihwan Jeong, Lior Shani, Azamat Tulepbergenov, Deepak Ramachandran, Martin Mladenov, Craig Boutilier

Embeddings have become a pivotal means to represent complex, multi-faceted information about entities, concepts, and relationships in a condensed and useful format.

Dimensionality Reduction Recommendation Systems

Discovering Personalized Semantics for Soft Attributes in Recommender Systems using Concept Activation Vectors

2 code implementations6 Feb 2022 Christina Göpfert, Alex Haig, Yinlam Chow, Chih-Wei Hsu, Ivan Vendrov, Tyler Lu, Deepak Ramachandran, Hubert Pham, Mohammad Ghavamzadeh, Craig Boutilier

Interactive recommender systems have emerged as a promising paradigm to overcome the limitations of the primitive user feedback used by traditional recommender systems (e. g., clicks, item consumption, ratings).

Recommendation Systems

RecSim NG: Toward Principled Uncertainty Modeling for Recommender Ecosystems

1 code implementation14 Mar 2021 Martin Mladenov, Chih-Wei Hsu, Vihan Jain, Eugene Ie, Christopher Colby, Nicolas Mayoraz, Hubert Pham, Dustin Tran, Ivan Vendrov, Craig Boutilier

The development of recommender systems that optimize multi-turn interaction with users, and model the interactions of different agents (e. g., users, content providers, vendors) in the recommender ecosystem have drawn increasing attention in recent years.

counterfactual Probabilistic Programming +1

Differentiable Meta-Learning of Bandit Policies

no code implementations NeurIPS 2020 Craig Boutilier, Chih-Wei Hsu, Branislav Kveton, Martin Mladenov, Csaba Szepesvari, Manzil Zaheer

Exploration policies in Bayesian bandits maximize the average reward over problem instances drawn from some distribution P. In this work, we learn such policies for an unknown distribution P using samples from P. Our approach is a form of meta-learning and exploits properties of P without making strong assumptions about its form.

Meta-Learning

Meta-Learning Bandit Policies by Gradient Ascent

no code implementations9 Jun 2020 Branislav Kveton, Martin Mladenov, Chih-Wei Hsu, Manzil Zaheer, Csaba Szepesvari, Craig Boutilier

Most bandit policies are designed to either minimize regret in any problem instance, making very few assumptions about the underlying environment, or in a Bayesian sense, assuming a prior distribution over environment parameters.

Meta-Learning Multi-Armed Bandits

Differentiable Bandit Exploration

no code implementations NeurIPS 2020 Craig Boutilier, Chih-Wei Hsu, Branislav Kveton, Martin Mladenov, Csaba Szepesvari, Manzil Zaheer

In this work, we learn such policies for an unknown distribution $\mathcal{P}$ using samples from $\mathcal{P}$.

Meta-Learning

RecSim: A Configurable Simulation Platform for Recommender Systems

1 code implementation11 Sep 2019 Eugene Ie, Chih-Wei Hsu, Martin Mladenov, Vihan Jain, Sanmit Narvekar, Jing Wang, Rui Wu, Craig Boutilier

We propose RecSim, a configurable platform for authoring simulation environments for recommender systems (RSs) that naturally supports sequential interaction with users.

Recommendation Systems reinforcement-learning +1

Empirical Bayes Regret Minimization

no code implementations4 Apr 2019 Chih-Wei Hsu, Branislav Kveton, Ofer Meshi, Martin Mladenov, Csaba Szepesvari

In this work, we pioneer the idea of algorithm design by minimizing the empirical Bayes regret, the average regret over problem instances sampled from a known distribution.

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