Papers by Rui Ha
DSG-MCTS: A Dynamic Strategy-Guided Monte Carlo Tree Search for Diversified Reasoning in Large Language Models (2025.emnlp-main)
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| Challenge: | Large language models (LLMs) have shown strong potential in complex reasoning tasks, but their performance often degrades, resulting in hallucinations, errors, and logical inconsistencies. |
| Approach: | They propose a framework that integrates multiple reasoning strategies to expand the reasoning space and a dynamic strategy selection mechanism that adapts to the task context. |
| Outcome: | The proposed framework outperforms existing state-of-the-art methods on a set of reasoning benchmarks. |
Beyond Surface-Level Detection: Towards Cognitive-Driven Defense Against Jailbreak Attacks via Meta-Operations Reasoning (2026.acl-long)
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| Challenge: | Existing defenses rely on shallow pattern matching, which struggles to generalize to novel and unseen attack strategies. |
| Approach: | They propose a framework which emulates human cognitive reasoning through a structured reasoning chain. |
| Outcome: | The proposed framework achieves state-of-the-art performance and exhibits strong generalization to unseen attacks. |
BaitAttack: Alleviating Intention Shift in Jailbreak Attacks via Adaptive Bait Crafting (2024.emnlp-main)
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| Challenge: | Existing attacks focus on meticulously constructing prompts to disguise harmful intentions . however, incorporation of disguising prompts may incur the challenge of "intention shift" |
| Approach: | They propose a jailbreak attack component, BaitAttack, to alleviate the effects of intention shift . Bait provides a response to the query, prompting LLMs to rectify or supplement the knowledge within the bait . |
| Outcome: | The proposed component, BaitAttack, reduces the effects of intention shift within jailbreak attacks. |
From "Aha Moments" to Controllable Thinking: Toward Meta-Cognitive Reasoning in LRMs via Decoupled Reasoning and Control (2026.acl-long)
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| Challenge: | Large Reasoning Models exhibit step-by-step reasoning, reflection, and backtracking, but these behaviors are often unregulated, leading to overthinking. |
| Approach: | They propose a meta-cognitive reasoning framework that decouples reasoning from control to enable independent optimization of control strategies. |
| Outcome: | Experiments show that the proposed model improves efficiency and accuracy across reasoning benchmarks. |
Batch-ICL: Effective, Efficient, and Order-Agnostic In-Context Learning (2024.findings-acl)
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| Challenge: | In-context learning (ICL) is a meta-optimization process that affects performance . we develop a batch-based inference algorithm that is order-agnostic to ICL examples . |
| Approach: | They develop an order-agnostic inference algorithm that aggregates ICL examples in batches . they find it outperforms most permutations of ICL, and it even exceeds the best order . |
| Outcome: | The proposed method outperforms standard ICL examples while reducing computational resources. |