Search Results for author: Longchao Da

Found 13 papers, 8 papers with code

CoMAL: Collaborative Multi-Agent Large Language Models for Mixed-Autonomy Traffic

1 code implementation18 Oct 2024 Huaiyuan Yao, Longchao Da, Vishnu Nandam, Justin Turnau, Zhiwei Liu, Linsey Pang, Hua Wei

It utilizes a Perception Module to observe surrounding agents and a Memory Module to store strategies for each agent.

Autonomous Vehicles

Segment as You Wish -- Free-Form Language-Based Segmentation for Medical Images

no code implementations2 Oct 2024 Longchao Da, Rui Wang, Xiaojian Xu, Parminder Bhatia, Taha Kass-Hout, Hua Wei, Cao Xiao

Medical imaging is crucial for diagnosing a patient's health condition, and accurate segmentation of these images is essential for isolating regions of interest to ensure precise diagnosis and treatment planning.

Anatomy Image Segmentation +5

SynTraC: A Synthetic Dataset for Traffic Signal Control from Traffic Monitoring Cameras

1 code implementation18 Aug 2024 Tiejin Chen, Prithvi Shirke, Bharatesh Chakravarthi, Arpitsinh Vaghela, Longchao Da, Duo Lu, Yezhou Yang, Hua Wei

This paper introduces SynTraC, the first public image-based traffic signal control dataset, aimed at bridging the gap between simulated environments and real-world traffic management challenges.

Management Traffic Signal Control

Shaded Route Planning Using Active Segmentation and Identification of Satellite Images

no code implementations18 Jul 2024 Longchao Da, Rohan Chhibba, Rushabh Jaiswal, Ariane Middel, Hua Wei

Heatwaves pose significant health risks, particularly due to prolonged exposure to high summer temperatures.

LLM Uncertainty Quantification through Directional Entailment Graph and Claim Level Response Augmentation

no code implementations1 Jul 2024 Longchao Da, Tiejin Chen, Lu Cheng, Hua Wei

The Large language models (LLMs) have showcased superior capabilities in sophisticated tasks across various domains, stemming from basic question-answer (QA), they are nowadays used as decision assistants or explainers for unfamiliar content.

Hallucination Uncertainty Quantification

Privacy-preserving Fine-tuning of Large Language Models through Flatness

no code implementations7 Mar 2024 Tiejin Chen, Longchao Da, Huixue Zhou, Pingzhi Li, Kaixiong Zhou, Tianlong Chen, Hua Wei

The privacy concerns associated with the use of Large Language Models (LLMs) have grown recently with the development of LLMs such as ChatGPT.

Knowledge Distillation Privacy Preserving +3

CityFlowER: An Efficient and Realistic Traffic Simulator with Embedded Machine Learning Models

1 code implementation9 Feb 2024 Longchao Da, Chen Chu, Weinan Zhang, Hua Wei

Addressing these limitations, we introduce CityFlowER, an advancement over the existing CityFlow simulator, designed for efficient and realistic city-wide traffic simulation.

Probabilistic Offline Policy Ranking with Approximate Bayesian Computation

no code implementations17 Dec 2023 Longchao Da, Porter Jenkins, Trevor Schwantes, Jeffrey Dotson, Hua Wei

In this paper, we present Probabilistic Offline Policy Ranking (POPR), a framework to address OPR problems by leveraging expert data to characterize the probability of a candidate policy behaving like experts, and approximating its entire performance posterior distribution to help with ranking.

Off-policy evaluation

Prompt to Transfer: Sim-to-Real Transfer for Traffic Signal Control with Prompt Learning

1 code implementation28 Aug 2023 Longchao Da, Minquan Gao, Hao Mei, Hua Wei

In this work, we leverage LLMs to understand and profile the system dynamics by a prompt-based grounded action transformation.

Reinforcement Learning (RL) Traffic Signal Control

LibSignal: An Open Library for Traffic Signal Control

2 code implementations19 Nov 2022 Hao Mei, Xiaoliang Lei, Longchao Da, Bin Shi, Hua Wei

This paper introduces a library for cross-simulator comparison of reinforcement learning models in traffic signal control tasks.

reinforcement-learning Reinforcement Learning +2

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