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Tang Sui

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#machine learning Preprint Oct 2026

SPD-MetaFormer is what you need for small-data brain decoding

This work examines two representative architectures, MAtt and GBWAtt, and finds that their learned attention weights remain close to uniform after training, and introduces SPD-MetaFormer, an attention-free architecture built on uniformly weighted Fr\'echet aggregation under log-Euclidean geometry.

Zhi-Da Wang, Wei Lyu, Yu Guo et al. · 0 citations
Preprint Aug 2026

Beyond Invariant Dictionary: Data-Driven Koopman Spectral Recovery with Filtered Extended Dynamic Mode Decomposition

The Projected Koopman Operator Approximation framework for constructing Filtered EDMD operators is introduced, and under independent noiseless sampling and exact-rank identifiability, the resulting empirical operators converge almost surely to their population counterparts.

Si-Jin Chen, Igor Mezić, Tang Sui · 0 citations

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