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Shujun Liu

4 accepted papers

2025

HAF-RM: A Hybrid Alignment Framework for Reward Model Training

ACL 2025long

The reward model has become increasingly important in alignment, assessment, and data construction for large language models (LLMs). Most existing researchers focus on enhancing reward models through data improvements, following the conventional training framework for reward models that directly opt…

2025

How Jailbreak Defenses Work and Ensemble? A Mechanistic Investigation

EMNLP 2025

Jailbreak attacks, where harmful prompts bypass generative models’ built-in safety, raise serious concerns about model vulnerability. While many defense methods have been proposed, the trade-offs between safety and helpfulness, and their application to Large Vision-Language Models (LVLMs), are not w

Cited by 0SourcePDFScholar
2025

Multi-Agent Simulator Drives Language Models for Legal Intensive Interaction

NAACL 2025findings

Large Language Models (LLMs) have significantly advanced legal intelligence, but the scarcity of scenario data impedes the progress toward interactive legal scenarios. This paper introduces a Multi-agent Legal Simulation Driver (MASER) to scalably generate synthetic data by simulating interactive le…

2024

ALaRM: Align Language Models via Hierarchical Rewards Modeling

ACL 2024findings

We introduce ALaRM, the first framework modeling hierarchical rewards in reinforcement learning from human feedback (RLHF), which is designed to enhance the alignment of large language models (LLMs) with human preferences. The framework addresses the limitations of current alignment approaches, whic…