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Zhengyi Yang

7 accepted papers

2025

AlphaDPO: Adaptive Reward Margin for Direct Preference Optimization

ICML 2025poster

Aligning large language models (LLMs) with human preferences requires balancing policy optimization with computational stability. While recent offline methods like DPO and SimPO bypass reinforcement learning’s complexity, they face critical limitations: DPO relies on static reference models that deg…

Cited by 0SourcePDFScholar
2025

On Efficiency-Effectiveness Trade-off of Diffusion-based Recommenders

NeurIPS 2025poster

Diffusion models have emerged as a powerful paradigm for generative sequential recommendation, which typically generate next items to recommend guided by user interaction histories with a multi-step denoising process. However, the multi-step process relies on discrete approximations, introducing dis…

Cited by 0SourcecodeScholar
2025

Towards Robust Alignment of Language Models: Distributionally Robustifying Direct Preference Optimization

ICLR 2025poster

This study addresses the challenge of noise in training datasets for Direct Preference Optimization (DPO), a method for aligning Large Language Models (LLMs) with human preferences. We categorize noise into pointwise noise, which includes low-quality data points, and pairwise noise, which encompasse…

2024

$\beta$-DPO: Direct Preference Optimization with Dynamic $\beta$

NeurIPS 2024poster

Direct Preference Optimization (DPO) has emerged as a compelling approach for training Large Language Models (LLMs) to adhere to human preferences. However, the performance of DPO is sensitive to the fine-tuning of its trade-off parameter $\beta$, as well as to the quality of the preference data. We…

Cited by 0SourcePDFScholar
2024

MolTC: Towards Molecular Relational Modeling In Language Models

ACL 2024findings

Molecular Relational Learning (MRL), aiming to understand interactions between molecular pairs, plays a pivotal role in advancing biochemical research. Recently, the adoption of large language models (LLMs), known for their vast knowledge repositories and advanced logical inference capabilities, has…

2024

On Softmax Direct Preference Optimization for Recommendation

NeurIPS 2024poster

Recommender systems aim to predict personalized rankings based on user preference data. With the rise of Language Models (LMs), LM-based recommenders have been widely explored due to their extensive world knowledge and powerful reasoning abilities. Most of the LM-based recommenders convert historica…

2023

Generate What You Prefer: Reshaping Sequential Recommendation via Guided Diffusion

NeurIPS 2023poster

Sequential recommendation aims to recommend the next item that matches a user’s interest, based on the sequence of items he/she interacted with before. Scrutinizing previous studies, we can summarize a common learning-to-classify paradigm— given a positive item, a recommender model performs negative…