Search Results for author: Lifeng Zhou

Found 11 papers, 2 papers with code

Challenges Faced by Large Language Models in Solving Multi-Agent Flocking

no code implementations6 Apr 2024 Peihan Li, Vishnu Menon, Bhavanaraj Gudiguntla, Daniel Ting, Lifeng Zhou

Flocking is a behavior where multiple agents in a system attempt to stay close to each other while avoiding collision and maintaining a desired formation.

Decision Making

Dynamic Adversarial Attacks on Autonomous Driving Systems

no code implementations10 Dec 2023 Amirhosein Chahe, Chenan Wang, Abhishek Jeyapratap, Kaidi Xu, Lifeng Zhou

Moreover, our method utilizes dynamic patches displayed on a screen, allowing for adaptive changes and movement, enhancing the flexibility and performance of the attack.

Adversarial Attack Autonomous Driving +3

Learning Decentralized Flocking Controllers with Spatio-Temporal Graph Neural Network

no code implementations29 Sep 2023 Siji Chen, Yanshen Sun, Peihan Li, Lifeng Zhou, Chang-Tien Lu

However, it has been observed that relying solely on the states of immediate neighbors is insufficient to imitate a centralized control policy.

Imitation Learning

Context-Aware Entity Grounding with Open-Vocabulary 3D Scene Graphs

1 code implementation27 Sep 2023 Haonan Chang, Kowndinya Boyalakuntla, Shiyang Lu, Siwei Cai, Eric Jing, Shreesh Keskar, Shijie Geng, Adeeb Abbas, Lifeng Zhou, Kostas Bekris, Abdeslam Boularias

We present an Open-Vocabulary 3D Scene Graph (OVSG), a formal framework for grounding a variety of entities, such as object instances, agents, and regions, with free-form text-based queries.

Navigate Object +2

Graph Neural Networks for Decentralized Multi-Agent Perimeter Defense

no code implementations23 Jan 2023 Elijah S. Lee, Lifeng Zhou, Alejandro Ribeiro, Vijay Kumar

In this work, we study the problem of decentralized multi-agent perimeter defense that asks for computing actions for defenders with local perceptions and communications to maximize the capture of intruders.

Imitation Learning

An Energy-Efficient Reconfigurable Autoencoder Implementation on FPGA

no code implementations17 Jan 2023 Murat Isik, Matthew Oldland, Lifeng Zhou

We compare the different results achieved with the FPGA and GPU-based implementations and then discuss the pros and cons of each implementation.

Data Compression Image Classification

Learning Decentralized Strategies for a Perimeter Defense Game with Graph Neural Networks

no code implementations24 Sep 2022 Elijah S. Lee, Lifeng Zhou, Alejandro Ribeiro, Vijay Kumar

We consider the problem of finding decentralized strategies for multi-agent perimeter defense games.

Graph Neural Networks for Decentralized Multi-Robot Submodular Action Selection

1 code implementation18 May 2021 Lifeng Zhou, Vishnu D. Sharma, QingBiao Li, Amanda Prorok, Alejandro Ribeiro, Pratap Tokekar, Vijay Kumar

We demonstrate the performance of our GNN-based learning approach in a scenario of active target tracking with large networks of robots.

Decision Making Motion Planning

Risk-Aware Planning and Assignment for Ground Vehicles using Uncertain Perception from Aerial Vehicles

no code implementations25 Mar 2020 Vishnu D. Sharma, Maymoonah Toubeh, Lifeng Zhou, Pratap Tokekar

Deep learning techniques can be used for semantic segmentation of the aerial image to create a cost map for safe ground robot navigation.

Robotics

Distributed Attack-Robust Submodular Maximization for Multi-Robot Planning

no code implementations2 Oct 2019 Lifeng Zhou, Vasileios Tzoumas, George J. Pappas, Pratap Tokekar

Since, DRM overestimates the number of attacks in each clique, in this paper we also introduce an Improved Distributed Robust Maximization (IDRM) algorithm.

Motion Planning

An Approximation Algorithm for Risk-averse Submodular Optimization

no code implementations24 Jul 2018 Lifeng Zhou, Pratap Tokekar

We formulate a discrete submodular maximization problem for selecting a set using Conditional-Value-at-Risk (CVaR), a risk metric commonly used in financial analysis.

Combinatorial Optimization

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