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Yuzi Yan

5 accepted papers

2025

3D-Properties: Identifying Challenges in DPO and Charting a Path Forward

ICLR 2025poster

Aligning large language models (LLMs) with human preferences has gained significant attention, with Proximal Policy Optimization (PPO) as a standard yet computationally expensive method and Direct Preference Optimization (DPO) as a more efficient alternative. While DPO offers simplicity, it remains…

Cited by 10Source ↗PDF ↗Scholar ↗
2024

Exploring the LLM Journey from Cognition to Expression with Linear Representations

ICML 2024poster

This paper presents an in-depth examination of the evolution and interplay of cognitive and expressive capabilities in large language models (LLMs), with a specific focus on Baichuan-7B and Baichuan-33B, an advanced bilingual (Chinese and English) LLM series. We define and explore the model's cognit…

Cited by 3Source ↗PDF ↗Scholar ↗
2023

Approximation Error Back-Propagation for Q-Function in Scalable Reinforcement Learning with Tree Dependence Structure

ICASSP 2023accepted

This paper applies the exponential decay property of scalable RL theory to a specific scenario where the network structure is a tree, and use KL (Kullback-Leibler) divergence to analyze the propagation of approximation error along the structure over time, in order to quantify its backtracking result…

Cited by 0Source ↗Scholar ↗
2022

Relative Distributed Formation and Obstacle Avoidance with Multi-agent Reinforcement Learning

ICRA 2022poster

Multi-agent formation as well as obstacle avoid-ance is one of the most actively studied topics in the field of multi-agent systems. Although some classic controllers like model predictive control (MPC) and fuzzy control achieve a certain measure of success, most of them require precise global infor…

Cited by 24Source ↗Scholar ↗
2021

Adaspeech 2: Adaptive Text to Speech with Untranscribed Data

ICASSP 2021accepted

Text to speech (TTS) is widely used to synthesize personal voice for a target speaker, where a well-trained source TTS model is fine-tuned with few paired adaptation data (speech and its transcripts) on this target speaker. However, in many scenarios, only untranscribed speech data is available for…

Cited by 0Source ↗Scholar ↗