Explore the Novel Relationship of Time-Frequency Domains in Multivariate Signals: A Dynamic System Perspective. - Yaru Li; Yujie Liu; Yuqing Ai; Xiang Chen; Liuchang Feng; Dezhong Yao 001; Min Li 027; Pedro A. Valdés-Sosa; Peng Ren 002 (IEEE Trans. Biomed. Eng., 2025)