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Hongyu Zang

10 accepted papers

2025

Learning Fused State Representations for Control from Multi-View Observations

ICML 2025poster

Multi-View Reinforcement Learning (MVRL) seeks to provide agents with multi-view observations, enabling them to perceive environment with greater effectiveness and precision. Recent advancements in MVRL focus on extracting latent representations from multiview observations and leveraging them in con…

2024

Learning Latent Dynamic Robust Representations for World Models

ICML 2024poster

Visual Model-Based Reinforcement Learning (MBRL) promises to encapsulate agent's knowledge about the underlying dynamics of the environment, enabling learning a world model as a useful planner. However, top MBRL agents such as Dreamer often struggle with visual pixel-based inputs in the presence of…

2023

Behavior Prior Representation learning for Offline Reinforcement Learning

ICLR 2023poster

Offline reinforcement learning (RL) struggles in environments with rich and noisy inputs, where the agent only has access to a fixed dataset without environment interactions. Past works have proposed common workarounds based on the pre-training of state representations, followed by policy training.…

2023

Principled Offline RL in the Presence of Rich Exogenous Information

ICML 2023poster

Learning to control an agent from offline data collected in a rich pixel-based visual observation space is vital for real-world applications of reinforcement learning (RL). A major challenge in this setting is the presence of input information that is hard to model and irrelevant to controlling the…

Cited by 4SourcePDFScholar
2023

Representation Learning in Deep RL via Discrete Information Bottleneck

AISTATS 2023poster

Several self-supervised representation learning methods have been proposed for reinforcement learning (RL) with rich observations. For real world applications of RL, recovering underlying latent states is crucial, particularly when sensory inputs can contain irrelevant and exogenous information. In…

Cited by 11SourcePDFScholar
2023

Understanding and Addressing the Pitfalls of Bisimulation-based Representations in Offline Reinforcement Learning

NeurIPS 2023poster

While bisimulation-based approaches hold promise for learning robust state representations for Reinforcement Learning (RL) tasks, their efficacy in offline RL tasks has not been up to par. In some instances, their performance has even significantly underperformed alternative methods. We aim to unde…

2023

WaveForM: Graph Enhanced Wavelet Learning for Long Sequence Forecasting of Multivariate Time Series

AAAI 2023technical

Multivariate time series (MTS) analysis and forecasting are crucial in many real-world applications, such as smart traffic management and weather forecasting. However, most existing work either focuses on short sequence forecasting or makes predictions predominantly with time domain features, which…

2022

Discrete Compositional Representations as an Abstraction for Goal Conditioned Reinforcement Learning

NeurIPS 2022accept

Goal-conditioned reinforcement learning (RL) is a promising direction for training agents that are capable of solving multiple tasks and reach a diverse set of objectives. How to \textit{specify} and \textit{ground} these goals in such a way that we can both reliably reach goals during training as…

Cited by 10SourcePDFScholar
2022

SimSR: Simple Distance-Based State Representations for Deep Reinforcement Learning

AAAI 2022technical

This work explores how to learn robust and generalizable state representation from image-based observations with deep reinforcement learning methods. Addressing the computational complexity, stringent assumptions and representation collapse challenges in existing work of bisimulation metric, we devi…