collaborators

5 papers

cs.AI2026

Reasoning or Memorization? Direction-Aware Diversity Exploration in LLM Reinforcement Learning

Jiangnan Xia, Yucheng Shi, Yu Yang +3

Reinforcement learning has become a key paradigm for eliciting reasoning abilities in large language models, where exploration is crucial for discovering effective solution traject…

cs.CL2026

Less is Enough: Synthesizing Diverse Data in LLM Feature Space with Sparse Autoencoders

Zhongzhi Li, Xuansheng Wu, Yijiang Li +2

The diversity of post-training data is critical for effective downstream performance in large language models (LLMs). Many existing approaches to constructing post-training data qu…

cs.AI2026

From Logs to Language: Learning Optimal Verbalization for LLM-Based Recommendation at Industry Scale

Yucheng Shi, Ying Li, Yu Wang +8

Large language models (LLMs) are promising backbones for generative recommender systems, yet a key challenge remains underexplored: verbalization, i.e., converting structured user…

cs.CR2026

SpatialJB: How Text Distribution Art Becomes the "Jailbreak Key" for LLM Guardrails

Zhiyi Mou, Jingyuan Yang, Zeheng Qian +6

While Large Language Models (LLMs) have powerful capabilities, they remain vulnerable to jailbreak attacks, which is a critical barrier to their safe web real-time application. Cur…

cs.LG2024

Global Graph Counterfactual Explanation: A Subgraph Mapping Approach

Yinhan He, Wendy Zheng, Yaochen Zhu +5

Graph Neural Networks (GNNs) have been widely deployed in various real-world applications. However, most GNNs are black-box models that lack explanations. One strategy to explain G…