Search Results for author: Huayu Chen

Found 8 papers, 5 papers with code

Noise Contrastive Alignment of Language Models with Explicit Rewards

1 code implementation8 Feb 2024 Huayu Chen, Guande He, Hang Su, Jun Zhu

Existing alignment methods, such as Direct Preference Optimization (DPO), are mainly tailored for pairwise preference data where rewards are implicitly defined rather than explicitly given.

Language Modelling

Score Regularized Policy Optimization through Diffusion Behavior

1 code implementation11 Oct 2023 Huayu Chen, Cheng Lu, Zhengyi Wang, Hang Su, Jun Zhu

Recent developments in offline reinforcement learning have uncovered the immense potential of diffusion modeling, which excels at representing heterogeneous behavior policies.

D4RL

Contrastive Energy Prediction for Exact Energy-Guided Diffusion Sampling in Offline Reinforcement Learning

3 code implementations25 Apr 2023 Cheng Lu, Huayu Chen, Jianfei Chen, Hang Su, Chongxuan Li, Jun Zhu

The main challenge for this setting is that the intermediate guidance during the diffusion sampling procedure, which is jointly defined by the sampling distribution and the energy function, is unknown and is hard to estimate.

D4RL Image Generation +1

Offline Reinforcement Learning via High-Fidelity Generative Behavior Modeling

1 code implementation29 Sep 2022 Huayu Chen, Cheng Lu, Chengyang Ying, Hang Su, Jun Zhu

To address this problem, we adopt a generative approach by decoupling the learned policy into two parts: an expressive generative behavior model and an action evaluation model.

Computational Efficiency D4RL +4

Weight-based Channel-model Matrix Framework provides a reasonable solution for EEG-based cross-dataset emotion recognition

no code implementations13 Sep 2022 Huayu Chen, Huanhuan He, Jing Zhu, Shuting Sun, Jianxiu Li, Xuexiao Shao, Junxiang Li, Xiaowei Li, Bin Hu

Cross-dataset emotion recognition as an extremely challenging task in the field of EEG-based affective computing is influenced by many factors, which makes the universal models yield unsatisfactory results.

EEG Emotion Recognition

Tianshou: a Highly Modularized Deep Reinforcement Learning Library

1 code implementation29 Jul 2021 Jiayi Weng, Huayu Chen, Dong Yan, Kaichao You, Alexis Duburcq, Minghao Zhang, Yi Su, Hang Su, Jun Zhu

In this paper, we present Tianshou, a highly modularized Python library for deep reinforcement learning (DRL) that uses PyTorch as its backend.

reinforcement-learning Reinforcement Learning (RL)

A study of resting-state EEG biomarkers for depression recognition

no code implementations23 Feb 2020 Shuting Sun, Jianxiu Li, Huayu Chen, Tao Gong, Xiaowei Li, Bin Hu

Results: Functional connectivity feature PLI is superior to the linear features and nonlinear features.

EEG feature selection

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