Cao, Lu, Yang Chen, Zhaochen Shen, Qiang Fang, Yun Gao, Shipeng Yu, Shenqiu Han, Binqiang Sun, Jian Qiu, and Zhongyan Huo. 2026. “Riemannian Geometric Characterization of Underwater Biological Signals via Fisher-Optimized SPD Manifolds”. Archives of Acoustics, June. https://doi.org/10.24423/archacoust.2026.4499.