Author

Kai-Xuan Ding

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#artificial intelligence Preprint Aug 2026

REINS: Refusal-Enhanced Inhibitory Steering with Sparse Autoencoder Features

Refusal-Enhanced INhibitory Steering is proposed, which suppresses harmful continuation features and enhances safe refusal features in the same SAE feature space, and substantially reduces harmful responses, markedly improves safe refusals and largely preserves general capabilities.

Kai-Xuan Ding, Hao-Yang Xu, Jihua Peng et al. · 0 citations

#small language model Preprint Aug 2026

Short Horizons and Sparse Concepts: a Mathematical View of the Readout in the J-lens

The Jacobian lens (J-lens) has been proposed as a way to read verbalizable representations from language models. However, its principle and meaning lack a detailed and theoretical discussion. We provide a mathematical view of this interpretation and of its assumed causal structure. Besides treating the J-lens as a heur...

Shi-Qi Yan, Kai-Xuan Ding, Chao-Hong Tan et al. · 0 citations