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Yan Han

7 accepted papers

2025

Extracting and Understanding the Superficial Knowledge in Alignment

NAACL 2025long

Alignment of large language models (LLMs) with human values and preferences, often achieved through fine-tuning based on human feedback, is essential for ensuring safe and responsible AI behaviors. However, the process typically requires substantial data and computation resources. Recent studies hav…

2025

Stepwise Perplexity-Guided Refinement for Efficient Chain-of-Thought Reasoning in Large Language Models

ACL 2025finding

Chain-of-Thought (CoT) reasoning, which breaks down complex tasks into intermediate reasoning steps, has significantly enhanced the performance of large language models (LLMs) on challenging tasks. However, the detailed reasoning process in CoT often incurs long generation times and high computation…

Cited by 0SourcePDFScholar
2025

Towards Patronizing and Condescending Language in Chinese Videos: A Multimodal Dataset and Detector

ICASSP 2025accepted

Patronizing and Condescending Language (PCL) is a form of discriminatory toxic speech targeting vulnerable groups, threatening both online and offline safety. While toxic speech research has mainly focused on overt toxicity, such as hate speech, microaggressions in the form of PCL remain underexplor…

Cited by 0SourceScholar
2023

Graph Mixture of Experts: Learning on Large-Scale Graphs with Explicit Diversity Modeling

NeurIPS 2023poster

Graph neural networks (GNNs) have found extensive applications in learning from graph data. However, real-world graphs often possess diverse structures and comprise nodes and edges of varying types. To bolster the generalization capacity of GNNs, it has become customary to augment training graph str…

2023

PINAT: A Permutation INvariance Augmented Transformer for NAS Predictor

AAAI 2023technical

Time-consuming performance evaluation is the bottleneck of traditional Neural Architecture Search (NAS) methods. Predictor-based NAS can speed up performance evaluation by directly predicting performance, rather than training a large number of sub-models and then validating their performance. Most p…