الباحثون

Fei Shen

المنشورات 8

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ContractLens: Latent Security Knowledge for Malicious Smart Contract Detection

Shuyi Miao, Xinyi Huang, Wangjie Qiu وآخرون · 2026

Detecting malicious smart contracts is essential to safeguarding the Web3.0 ecosystem. However, existing auditing methods based on large language models (LLMs) largely rely on prompt engineering or attack-specific fine-tuning, while the internal representations that support malicious logic detection remain poorly chara …

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BARQ: Balanced Codebook Refinement for Low-Bit LLM Quantization

Chenhang Cui, Xu Xie, Linrui Xu وآخرون · 2026

As large language models (LLMs) grow in parameter count, model storage and parameter memory traffic have become major bottlenecks to efficient deployment. Codebook-based weight quantization reduces these costs, but imbalanced nearest-codeword assignments during fitting can leave some codewords insufficiently updated, l …

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Selecting What Matters: Semantic Compression-Guided Selective Pooling for Long-Context Embeddings

Zifeng Cheng, Jie Zheng, Zhiwei Jiang وآخرون · 2026

Large language models (LLMs) have shown strong potential as training-free text encoders for long-context embeddings. Existing approaches primarily improve information flow under causal attention and typically construct embeddings by uniformly averaging all token representations. However, for long documents, such mean p …

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ACTR: Aligning Thoughts and Responses for Multilingual Safety in Reasoning LLMs

Xianhui Zhang, Jian Yu, Chengyu Xie وآخرون · 2026

Ensuring the safety of reasoning large language models (LLMs) across languages is essential for their reliable deployment. However, when exposed to jailbreak attacks in non-high-resource languages, these models may generate unsafe responses even when their reasoning traces identify safety risks. To address this issue, …

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Focusing Condition: Inference-Time Self-Contrastive Steering Elicits Better Conditional Text Embeddings in LLMs

Zifeng Cheng, Lingyun Qian, Zhiwei Jiang وآخرون · 2026

Extracting conditional text embeddings from large language models (LLMs) is a promising paradigm, as it requires neither additional data nor fine-tuning. Existing methods incorporate conditions into prompts to guide LLMs to focus on specific aspects and elicit conditional text embeddings. However, relying solely on pro …

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