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Weixian Waylon Li

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#machine learning Preprint Sep 2026

When Can Attention Heads Be Statically Defined?

Some attention heads learn similar patterns across inputs. Reusing these patterns could reduce training cost by avoiding repeated query-key score computation and softmax. Through controlled pretraining comparisons, we identify Selective Attention Freezing (SAF), which selects heads with low attention-pattern variance a...

Weixian Waylon Li, Yin-Tao Tai, Marcio Fonseca et al. · 0 citations
Preprint Sep 2026

SAVLA: Symmetry-Aware Vision-Language-Action Models for Robotic Manipulation

Vision-language-action (VLA) models have become the dominant paradigm for language-conditioned robot manipulation. However, although images and language instructions inherently encode geometric information, VLAs acquire their spatial competence purely from demonstrations. As a result, they are reliable only within the...

Jun-Le Li, Weixian Waylon Li, Fu-Xiang Wu et al. · 0 citations

Summoning the Oracle to Slay It: Mitigating Look-Ahead Bias in Financial Backtesting with Large Language Models

FinCAD is proposed, an inference-time adaptation of Context-Aware Decoding that attenuates contributions from memorised historical outcomes without retraining and raises the subset-averaged in-sample/out-of-sample Spearman correlation on an eleven-model leaderboard.

Weixian Waylon Li, Mengyu Wang, Tiejun Ma · 2 citations

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