Search Results for author: Longchao Da

Found 7 papers, 4 papers with code

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

no code implementations9 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.

Open-TI: Open Traffic Intelligence with Augmented Language Model

1 code implementation30 Dec 2023 Longchao Da, Kuanru Liou, Tiejin Chen, Xuesong Zhou, Xiangyong Luo, Yezhou Yang, Hua Wei

Transportation has greatly benefited the cities' development in the modern civilization process.

Language Modelling

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)

Uncertainty-aware Grounded Action Transformation towards Sim-to-Real Transfer for Traffic Signal Control

1 code implementation23 Jul 2023 Longchao Da, Hao Mei, Romir Sharma, Hua Wei

Traffic signal control (TSC) is a complex and important task that affects the daily lives of millions of people.

Reinforcement Learning (RL)

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 (RL)

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