Combining BERT Model with Semi-Supervised Incremental Learning for Heterogeneous Knowledge Fusion of High-Speed Railway On-Board System

Table 1

Examples of entities in the on-board system fault KB.

Data type	Entity 1	Entity 2
Fault type	A-Kernel mode transition invalid	A mode transition invalid
Equipment phenomena	CTCS-3 exception downgraded to CTCS-2	C3 ⟶ C2
Fault cause	Wireless communication connection timeout	Infinite communication connection timeout
Treatment measure	Switching and restarting the system	Change system and reboot
Maintenance measure	Replace emergency brake relay	Check emergency brake relay