Search Results for author: Lawson L. S. Wong

Found 22 papers, 7 papers with code

Vision and Language Navigation in the Real World via Online Visual Language Mapping

no code implementations16 Oct 2023 Chengguang Xu, Hieu T. Nguyen, Christopher Amato, Lawson L. S. Wong

Directly transferring SOTA navigation policies trained in simulation to the real world is challenging due to the visual domain gap and the absence of prior knowledge about unseen environments.

Vision and Language Navigation

Can Euclidean Symmetry be Leveraged in Reinforcement Learning and Planning?

no code implementations17 Jul 2023 Linfeng Zhao, Owen Howell, Jung Yeon Park, Xupeng Zhu, Robin Walters, Lawson L. S. Wong

In robotic tasks, changes in reference frames typically do not influence the underlying physical properties of the system, which has been known as invariance of physical laws. These changes, which preserve distance, encompass isometric transformations such as translations, rotations, and reflections, collectively known as the Euclidean group.

reinforcement-learning

The Surprising Effectiveness of Equivariant Models in Domains with Latent Symmetry

no code implementations16 Nov 2022 Dian Wang, Jung Yeon Park, Neel Sortur, Lawson L. S. Wong, Robin Walters, Robert Platt

Extensive work has demonstrated that equivariant neural networks can significantly improve sample efficiency and generalization by enforcing an inductive bias in the network architecture.

Inductive Bias

Scaling up and Stabilizing Differentiable Planning with Implicit Differentiation

no code implementations24 Oct 2022 Linfeng Zhao, Huazhe Xu, Lawson L. S. Wong

To alleviate this issue, we propose to differentiate through the Bellman fixed-point equation to decouple forward and backward passes for Value Iteration Network and its variants, which enables constant backward cost (in planning horizon) and flexible forward budget and helps scale up to large tasks.

Visual Navigation

Robust Imitation of a Few Demonstrations with a Backwards Model

no code implementations17 Oct 2022 Jung Yeon Park, Lawson L. S. Wong

On continuous control domains, we evaluate the robustness when starting from different initial states unseen in the demonstration data.

Continuous Control Imitation Learning

Binding Actions to Objects in World Models

1 code implementation27 Apr 2022 Ondrej Biza, Robert Platt, Jan-Willem van de Meent, Lawson L. S. Wong, Thomas Kipf

We study the problem of binding actions to objects in object-factored world models using action-attention mechanisms.

Hard Attention Object

Factored World Models for Zero-Shot Generalization in Robotic Manipulation

1 code implementation10 Feb 2022 Ondrej Biza, Thomas Kipf, David Klee, Robert Platt, Jan-Willem van de Meent, Lawson L. S. Wong

In this paper, we learn to generalize over robotic pick-and-place tasks using object-factored world models, which combat the combinatorial explosion by ensuring that predictions are equivariant to permutations of objects.

Object Zero-shot Generalization

Natural Language for Human-Robot Collaboration: Problems Beyond Language Grounding

no code implementations9 Oct 2021 Seth Pate, Wei Xu, ZiYi Yang, Maxwell Love, Siddarth Ganguri, Lawson L. S. Wong

To enable robots to instruct humans in collaborations, we identify several aspects of language processing that are not commonly studied in this context.

Hierarchical Robot Navigation in Novel Environments using Rough 2-D Maps

no code implementations7 Jun 2021 Chengguang Xu, Christopher Amato, Lawson L. S. Wong

In this work, we propose an approach that leverages a rough 2-D map of the environment to navigate in novel environments without requiring further learning.

Navigate Robot Navigation

Action Priors for Large Action Spaces in Robotics

1 code implementation11 Jan 2021 Ondrej Biza, Dian Wang, Robert Platt, Jan-Willem van de Meent, Lawson L. S. Wong

This paper proposes an alternative approach where the solutions of previously solved tasks are used to produce an action prior that can facilitate exploration in future tasks.

reinforcement-learning Reinforcement Learning (RL) +2

Model-based Navigation in Environments with Novel Layouts Using Abstract $2$-D Maps

no code implementations1 Jan 2021 Linfeng Zhao, Lawson L. S. Wong

To learn this ability, we need to efficiently train an agent on environments with a small proportion of training maps and share knowledge effectively across the environments.

Decision Making

Deep Imitation Learning for Bimanual Robotic Manipulation

1 code implementation NeurIPS 2020 Fan Xie, Alexander Chowdhury, M. Clara De Paolis Kaluza, Linfeng Zhao, Lawson L. S. Wong, Rose Yu

Compared to baselines, our model generalizes better and achieves higher success rates on several simulated bimanual robotic manipulation tasks.

Imitation Learning

Accurately and Efficiently Interpreting Human-Robot Instructions of Varying Granularities

1 code implementation21 Apr 2017 Dilip Arumugam, Siddharth Karamcheti, Nakul Gopalan, Lawson L. S. Wong, Stefanie Tellex

In this work, by grounding commands to all the tasks or subtasks available in a hierarchical planning framework, we arrive at a model capable of interpreting language at multiple levels of specificity ranging from coarse to more granular.

Specificity

Object-based World Modeling in Semi-Static Environments with Dependent Dirichlet-Process Mixtures

no code implementations2 Dec 2015 Lawson L. S. Wong, Thanard Kurutach, Leslie Pack Kaelbling, Tomás Lozano-Pérez

We refer to this attribute-based representation as a world model, and consider how to acquire it via noisy perception and maintain it over time, as objects are added, changed, and removed in the world.

Attribute Clustering

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