Zhengyu Chen


2024

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Scaling Laws Across Model Architectures: A Comparative Analysis of Dense and MoE Models in Large Language Models
Siqi Wang | Zhengyu Chen | Bei Li | Keqing He | Min Zhang | Jingang Wang
Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing

The scaling of large language models (LLMs) is a critical research area for the efficiency and effectiveness of model training and deployment. Our work investigates the transferability and discrepancies of scaling laws between Dense Models and Mixture of Experts (MoE) models. Through a combination of theoretical analysis and extensive experiments, including consistent loss scaling, optimal batch size/learning rate scaling, and resource allocation strategies scaling, our findings reveal that the power-law scaling framework also applies to MoE Models, indicating that the fundamental principles governing the scaling behavior of these models are preserved, even though the architecture differs. Additionally, MoE Models demonstrate superior generalization, resulting in lower testing losses with the same training compute budget compared to Dense Models. These findings indicate the scaling consistency and transfer generalization capabilities of MoE Models, providing new insights for optimizing MoE Model training and deployment strategies.

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Let’s Ask GNN: Empowering Large Language Model for Graph In-Context Learning
Zhengyu Hu | Yichuan Li | Zhengyu Chen | Jingang Wang | Han Liu | Kyumin Lee | Kaize Ding
Findings of the Association for Computational Linguistics: EMNLP 2024

Textual Attributed Graphs (TAGs) are crucial for modeling complex real-world systems, yet leveraging large language models (LLMs) for TAGs presents unique challenges due to the gap between sequential text processing and graph-structured data. We introduce AskGNN, a novel approach that bridges this gap by leveraging In-Context Learning (ICL) to integrate graph data and task-specific information into LLMs. AskGNN employs a Graph Neural Network (GNN)-powered structure-enhanced retriever to select labeled nodes across graphs, incorporating complex graph structures and their supervision signals. Our learning-to-retrieve algorithm optimizes the retriever to select example nodes that maximize LLM performance on graph. Experiments across three tasks and seven LLMs demonstrate AskGNN’s superior effectiveness in graph task performance, opening new avenues for applying LLMs to graph-structured data without extensive fine-tuning.

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FinNLP-AgentScen-2024 Shared Task: Financial Challenges in Large Language Models - FinLLMs
Qianqian Xie | Jimin Huang | Dong Li | Zhengyu Chen | Ruoyu Xiang | Mengxi Xiao | Yangyang Yu | Vijayasai Somasundaram | Kailai Yang | Chenhan Yuan | Zheheng Luo | Zhiwei Liu | Yueru He | Yuechen Jiang | Haohang Li | Duanyu Feng | Xiao-Yang Liu | Benyou Wang | Hao Wang | Yanzhao Lai | Jordan Suchow | Alejandro Lopez-Lira | Min Peng | Sophia Ananiadou
Proceedings of the Eighth Financial Technology and Natural Language Processing and the 1st Agent AI for Scenario Planning

2023

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MAPO: Boosting Large Language Model Performance with Model-Adaptive Prompt Optimization
Yuyan Chen | Zhihao Wen | Ge Fan | Zhengyu Chen | Wei Wu | Dayiheng Liu | Zhixu Li | Bang Liu | Yanghua Xiao
Findings of the Association for Computational Linguistics: EMNLP 2023

Prompt engineering, as an efficient and effective way to leverage Large Language Models (LLM), has drawn a lot of attention from the research community. The existing research primarily emphasizes the importance of adapting prompts to specific tasks, rather than specific LLMs. However, a good prompt is not solely defined by its wording, but also binds to the nature of the LLM in question. In this work, we first quantitatively demonstrate that different prompts should be adapted to different LLMs to enhance their capabilities across various downstream tasks in NLP. Then we novelly propose a model-adaptive prompt optimizer (MAPO) method that optimizes the original prompts for each specific LLM in downstream tasks. Extensive experiments indicate that the proposed method can effectively refine prompts for an LLM, leading to significant improvements over various downstream tasks.