Huang, Yongqin, Guoyan Che, Jianqiu Chen, and Guobin Gu. 2025. “Design and Research of the Signal Intelligent Operation and Maintenance System for Nanning Metro Line 4 Based on PHM Technology”. International Journal of Engineering Advances 2 (1): 72-79. https://doi.org/10.71222/hr8cnw36.