1. Peimin, Y.A.N.G.: Reflections on the development direction and analysis of current urban rail transit planning and construction in China. Urban Mass Transit 12, 13–17 (2019)
2. Yongshen, W.U., Junyan, W.A.N.G., Jingyan, L.U., Congcong, C.H.E., Yunfei, W.A.N.G., Yanhong, S.H.I.: Research on technical solutions for intelligent operation and maintenance system for urban rail vehicles. Rolling Stock 59(1), 22–26 (2021)
3. Huang, H.Q., Yu, J., Liao, X., et al.: Review on knowledge graphs. Comp. Sys. Appl. 28(6), 1–12 (2019). (in Chinese)
4. Li, J.Z., Hou, L.: Reviews on knowledge graph research. J. Shanxi Univ. (Natural Science Edition) 40(3), 454–459 (2017). (in Chinese)
5. Huang, W.: Optimization of planned maintenance mode for urban rail transit vehicles. Anhui University of Technology (2019)