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Bo Cheng

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#artificial intelligence Preprint Aug 2025

From Isolation to Alignment: Unified LoRA for Efficient Multi-Task Learning

This work reveals a paradox where a simplified, router-free multi-head model with high inter-head redundancy outperforms complex, diversity-driven baselines and proposes Align-LoRA, a unified and efficient framework that shifts the focus from architectural isolation to representation alignment.

Jinda Liu, Bo Cheng, Yi Chang et al. · 1 citation
Preprint Aug 2026

Thinking vs. NoThinking: Towards Interpreting Reasoning Mechanisms of Large Language Models via Sparse Autoencoders

This work applies Top-K Sparse Autoencoders to the intermediate representations of DeepSeek-R1-Distill-Qwen-7B and examines the model's divergent behaviors across math-solving tasks of three distinct difficulty levels, identifying a clear distinction in how the model functions under two reasoning modes.

Bo Cheng, Qiaolin Lu, Yi Chang et al. · 0 citations

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