Papers by Sijia Wen

2 papers
Detecting Stealthy Backdoor Samples based on Intra-class Distance for Large Language Models (2025.findings-emnlp)

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Challenge: Existing detectors use classifier-style probability signals or rely on rewriting, which can degrade quality and introduce new triggers.
Approach: They propose to efficiently remove poisoned examples before or during fine-tuning .
Outcome: The proposed method outperforms prior detectors on two machine translation datasets and one QA dataset.
Beyond the Surface: A Solution-Aware Retrieval Model for Competition-level Code Generation (2025.findings-emnlp)

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Challenge: Existing retrieval models emphasize surface-level semantic similarity, neglecting deeper solution-level logical similarities.
Approach: They propose a solution-aware ranking model empowered by synthetic data for competitive programming tasks.
Outcome: The proposed ranking model outperforms existing retrieval models in precision and recall metrics.

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