Search Results for author: Liyuan Mao

Found 6 papers, 2 papers with code

DecisionNCE: Embodied Multimodal Representations via Implicit Preference Learning

no code implementations28 Feb 2024 Jianxiong Li, Jinliang Zheng, Yinan Zheng, Liyuan Mao, Xiao Hu, Sijie Cheng, Haoyi Niu, Jihao Liu, Yu Liu, Jingjing Liu, Ya-Qin Zhang, Xianyuan Zhan

Multimodal pretraining has emerged as an effective strategy for the trinity of goals of representation learning in autonomous robots: 1) extracting both local and global task progression information; 2) enforcing temporal consistency of visual representation; 3) capturing trajectory-level language grounding.

Contrastive Learning Decision Making +1

ODICE: Revealing the Mystery of Distribution Correction Estimation via Orthogonal-gradient Update

1 code implementation1 Feb 2024 Liyuan Mao, Haoran Xu, Weinan Zhang, Xianyuan Zhan

To resolve this issue, we propose a simple yet effective modification that projects the backward gradient onto the normal plane of the forward gradient, resulting in an orthogonal-gradient update, a new learning rule for DICE-based methods.

Imitation Learning Offline RL +1

MADiff: Offline Multi-agent Learning with Diffusion Models

1 code implementation27 May 2023 Zhengbang Zhu, Minghuan Liu, Liyuan Mao, Bingyi Kang, Minkai Xu, Yong Yu, Stefano Ermon, Weinan Zhang

To the best of our knowledge, MADiff is the first diffusion-based multi-agent offline RL framework, which behaves as both a decentralized policy and a centralized controller.

Offline RL Trajectory Prediction

Word Embedding and Topic Modeling Enhanced Multiple Features for Content Linking and Argument / Sentiment Labeling in Online Forums

no code implementations WS 2017 Lei Li, Liyuan Mao, Moye Chen

Multiple grammatical and semantic features are adopted in content linking and argument/sentiment labeling for online forums in this paper.

Clustering Sentence +3

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