Search Results for author: Linxi Fan

Found 22 papers, 12 papers with code

RubiksNet: Learnable 3D-Shift for Efficient Video Action Recognition

1 code implementation ECCV 2020 Linxi Fan, Shyamal Buch, Guanzhi Wang, Ryan Cao, Yuke Zhu, Juan Carlos Niebles, Li Fei-Fei

We analyze the suitability of our new primitive for video action recognition and explore several novel variations of our approach to enable stronger representational flexibility while maintaining an efficient design.

Action Recognition Temporal Action Localization +1

ARDuP: Active Region Video Diffusion for Universal Policies

no code implementations19 Jun 2024 Shuaiyi Huang, Mara Levy, Zhenyu Jiang, Anima Anandkumar, Yuke Zhu, Linxi Fan, De-An Huang, Abhinav Shrivastava

Sequential decision-making can be formulated as a text-conditioned video generation problem, where a video planner, guided by a text-defined goal, generates future frames visualizing planned actions, from which control actions are subsequently derived.

Decision Making Video Generation

DrEureka: Language Model Guided Sim-To-Real Transfer

no code implementations4 Jun 2024 Yecheng Jason Ma, William Liang, Hung-Ju Wang, Sam Wang, Yuke Zhu, Linxi Fan, Osbert Bastani, Dinesh Jayaraman

Transferring policies learned in simulation to the real world is a promising strategy for acquiring robot skills at scale.

Language Modelling

MimicGen: A Data Generation System for Scalable Robot Learning using Human Demonstrations

no code implementations26 Oct 2023 Ajay Mandlekar, Soroush Nasiriany, Bowen Wen, Iretiayo Akinola, Yashraj Narang, Linxi Fan, Yuke Zhu, Dieter Fox

Imitation learning from a large set of human demonstrations has proved to be an effective paradigm for building capable robot agents.

Imitation Learning

Eureka: Human-Level Reward Design via Coding Large Language Models

1 code implementation19 Oct 2023 Yecheng Jason Ma, William Liang, Guanzhi Wang, De-An Huang, Osbert Bastani, Dinesh Jayaraman, Yuke Zhu, Linxi Fan, Anima Anandkumar

The generality of Eureka also enables a new gradient-free in-context learning approach to reinforcement learning from human feedback (RLHF), readily incorporating human inputs to improve the quality and the safety of the generated rewards without model updating.

Decision Making In-Context Learning +1

AMAGO: Scalable In-Context Reinforcement Learning for Adaptive Agents

1 code implementation15 Oct 2023 Jake Grigsby, Linxi Fan, Yuke Zhu

We introduce AMAGO, an in-context Reinforcement Learning (RL) agent that uses sequence models to tackle the challenges of generalization, long-term memory, and meta-learning.

In-Context Learning Meta-Learning +2

Voyager: An Open-Ended Embodied Agent with Large Language Models

1 code implementation25 May 2023 Guanzhi Wang, Yuqi Xie, Yunfan Jiang, Ajay Mandlekar, Chaowei Xiao, Yuke Zhu, Linxi Fan, Anima Anandkumar

We introduce Voyager, the first LLM-powered embodied lifelong learning agent in Minecraft that continuously explores the world, acquires diverse skills, and makes novel discoveries without human intervention.

VIMA: General Robot Manipulation with Multimodal Prompts

2 code implementations6 Oct 2022 Yunfan Jiang, Agrim Gupta, Zichen Zhang, Guanzhi Wang, Yongqiang Dou, Yanjun Chen, Li Fei-Fei, Anima Anandkumar, Yuke Zhu, Linxi Fan

We show that a wide spectrum of robot manipulation tasks can be expressed with multimodal prompts, interleaving textual and visual tokens.

Imitation Learning Language Modelling +3

MetaMorph: Learning Universal Controllers with Transformers

2 code implementations ICLR 2022 Agrim Gupta, Linxi Fan, Surya Ganguli, Li Fei-Fei

Multiple domains like vision, natural language, and audio are witnessing tremendous progress by leveraging Transformers for large scale pre-training followed by task specific fine tuning.

Zero-shot Generalization

Pre-Trained Language Models for Interactive Decision-Making

1 code implementation3 Feb 2022 Shuang Li, Xavier Puig, Chris Paxton, Yilun Du, Clinton Wang, Linxi Fan, Tao Chen, De-An Huang, Ekin Akyürek, Anima Anandkumar, Jacob Andreas, Igor Mordatch, Antonio Torralba, Yuke Zhu

Together, these results suggest that language modeling induces representations that are useful for modeling not just language, but also goals and plans; these representations can aid learning and generalization even outside of language processing.

Imitation Learning Language Modelling

SECANT: Self-Expert Cloning for Zero-Shot Generalization of Visual Policies

1 code implementation17 Jun 2021 Linxi Fan, Guanzhi Wang, De-An Huang, Zhiding Yu, Li Fei-Fei, Yuke Zhu, Anima Anandkumar

A student network then learns to mimic the expert policy by supervised learning with strong augmentations, making its representation more robust against visual variations compared to the expert.

Autonomous Driving Image Augmentation +3

World of Bits: An Open-Domain Platform for Web-Based Agents

no code implementations ICML 2017 Tianlin Shi, Andrej Karpathy, Linxi Fan, Jonathan Hernandez, Percy Liang

While simulated game environments have greatly accelerated research in reinforcement learning, existing environments lack the open-domain realism of tasks in computer vision or natural language processing, which operate on artifacts created by humans in natural, organic settings.

reinforcement-learning Reinforcement Learning (RL)

Kernel Approximation Methods for Speech Recognition

no code implementations13 Jan 2017 Avner May, Alireza Bagheri Garakani, Zhiyun Lu, Dong Guo, Kuan Liu, Aurélien Bellet, Linxi Fan, Michael Collins, Daniel Hsu, Brian Kingsbury, Michael Picheny, Fei Sha

First, in order to reduce the number of random features required by kernel models, we propose a simple but effective method for feature selection.

feature selection speech-recognition +1

Deconstructing the Ladder Network Architecture

no code implementations19 Nov 2015 Mohammad Pezeshki, Linxi Fan, Philemon Brakel, Aaron Courville, Yoshua Bengio

Although the empirical results are impressive, the Ladder Network has many components intertwined, whose contributions are not obvious in such a complex architecture.

Denoising

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