On Exponential Convergence of Self-Learning Observers for Fault Reconstruction via Halanay's Inequality Approach. - Lining Tan; Ruiqiu Lu; Hui-jie Sun; Lianren Zhang; Jin Wu 002; Dezhi Xu; Chengxi Zhang (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2026)