Search Results for author: Zheyuan Hu

Found 16 papers, 6 papers with code

ASGN: An Active Semi-supervised Graph Neural Network for Molecular Property Prediction

1 code implementation7 Jul 2020 Zhongkai Hao, Chengqiang Lu, Zheyuan Hu, Hao Wang, Zhenya Huang, Qi Liu, Enhong Chen, Cheekong Lee

Here we propose a novel framework called Active Semi-supervised Graph Neural Network (ASGN) by incorporating both labeled and unlabeled molecules.

Active Learning Molecular Property Prediction +1

Heterogeneous Risk Minimization

1 code implementation9 May 2021 Jiashuo Liu, Zheyuan Hu, Peng Cui, Bo Li, Zheyan Shen

In this paper, we propose Heterogeneous Risk Minimization (HRM) framework to achieve joint learning of latent heterogeneity among the data and invariant relationship, which leads to stable prediction despite distributional shifts.

When Do Extended Physics-Informed Neural Networks (XPINNs) Improve Generalization?

no code implementations20 Sep 2021 Zheyuan Hu, Ameya D. Jagtap, George Em Karniadakis, Kenji Kawaguchi

Specifically, for general multi-layer PINNs and XPINNs, we first provide a prior generalization bound via the complexity of the target functions in the PDE problem, and a posterior generalization bound via the posterior matrix norms of the networks after optimization.

Kernelized Heterogeneous Risk Minimization

1 code implementation24 Oct 2021 Jiashuo Liu, Zheyuan Hu, Peng Cui, Bo Li, Zheyan Shen

The ability to generalize under distributional shifts is essential to reliable machine learning, while models optimized with empirical risk minimization usually fail on non-$i. i. d$ testing data.

Integrated Latent Heterogeneity and Invariance Learning in Kernel Space

no code implementations NeurIPS 2021 Jiashuo Liu, Zheyuan Hu, Peng Cui, Bo Li, Zheyan Shen

The ability to generalize under distributional shifts is essential to reliable machine learning, while models optimized with empirical risk minimization usually fail on non-$i. i. d$ testing data.

Enhancing Collaborative Filtering Recommender with Prompt-Based Sentiment Analysis

1 code implementation19 Jul 2022 Elliot Dang, Zheyuan Hu, Tong Li

We build the recommenders on the Amazon US Reviews dataset, and tune the pretrained BERT and RoBERTa with the traditional fine-tuned paradigm as well as the new prompt-based learning paradigm.

Collaborative Filtering Sentiment Analysis

Dexterous Manipulation from Images: Autonomous Real-World RL via Substep Guidance

no code implementations19 Dec 2022 Kelvin Xu, Zheyuan Hu, Ria Doshi, Aaron Rovinsky, Vikash Kumar, Abhishek Gupta, Sergey Levine

In this paper, we describe a system for vision-based dexterous manipulation that provides a "programming-free" approach for users to define new tasks and enable robots with complex multi-fingered hands to learn to perform them through interaction.

reinforcement-learning Reinforcement Learning (RL)

Tackling the Curse of Dimensionality with Physics-Informed Neural Networks

no code implementations23 Jul 2023 Zheyuan Hu, Khemraj Shukla, George Em Karniadakis, Kenji Kawaguchi

We demonstrate in various diverse tests that the proposed method can solve many notoriously hard high-dimensional PDEs, including the Hamilton-Jacobi-Bellman (HJB) and the Schr\"{o}dinger equations in tens of thousands of dimensions very fast on a single GPU using the PINNs mesh-free approach.

REBOOT: Reuse Data for Bootstrapping Efficient Real-World Dexterous Manipulation

no code implementations6 Sep 2023 Zheyuan Hu, Aaron Rovinsky, Jianlan Luo, Vikash Kumar, Abhishek Gupta, Sergey Levine

We demonstrate the benefits of reusing past data as replay buffer initialization for new tasks, for instance, the fast acquisition of intricate manipulation skills in the real world on a four-fingered robotic hand.

Imitation Learning Reinforcement Learning (RL)

Bias-Variance Trade-off in Physics-Informed Neural Networks with Randomized Smoothing for High-Dimensional PDEs

no code implementations26 Nov 2023 Zheyuan Hu, Zhouhao Yang, Yezhen Wang, George Em Karniadakis, Kenji Kawaguchi

To optimize the bias-variance trade-off, we combine the two approaches in a hybrid method that balances the rapid convergence of the biased version with the high accuracy of the unbiased version.

Computational Efficiency

Hutchinson Trace Estimation for High-Dimensional and High-Order Physics-Informed Neural Networks

1 code implementation22 Dec 2023 Zheyuan Hu, Zekun Shi, George Em Karniadakis, Kenji Kawaguchi

We further showcase HTE's convergence to the original PINN loss and its unbiased behavior under specific conditions.

SERL: A Software Suite for Sample-Efficient Robotic Reinforcement Learning

no code implementations29 Jan 2024 Jianlan Luo, Zheyuan Hu, Charles Xu, You Liang Tan, Jacob Berg, Archit Sharma, Stefan Schaal, Chelsea Finn, Abhishek Gupta, Sergey Levine

We posit that a significant challenge to widespread adoption of robotic RL, as well as further development of robotic RL methods, is the comparative inaccessibility of such methods.

reinforcement-learning Reinforcement Learning (RL)

Score-Based Physics-Informed Neural Networks for High-Dimensional Fokker-Planck Equations

no code implementations12 Feb 2024 Zheyuan Hu, Zhongqiang Zhang, George Em Karniadakis, Kenji Kawaguchi

The score function, defined as the gradient of the LL, plays a fundamental role in inferring LL and PDF and enables fast SDE sampling.

Yell At Your Robot: Improving On-the-Fly from Language Corrections

no code implementations19 Mar 2024 Lucy Xiaoyang Shi, Zheyuan Hu, Tony Z. Zhao, Archit Sharma, Karl Pertsch, Jianlan Luo, Sergey Levine, Chelsea Finn

In this paper, we make the following observation: high-level policies that index into sufficiently rich and expressive low-level language-conditioned skills can be readily supervised with human feedback in the form of language corrections.

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