Table 4 Weighted values of keywords in unit-level accidents (top 30)
From: A chemical accident cause text mining method based on improved accident triangle
No | Keywords | TF-IDF | No | Keywords | TF-IDF | No | Keywords | TF-IDF |
|---|---|---|---|---|---|---|---|---|
1 | Scene | 0.1000 | 11 | Pipeline | 0.0437 | 21 | Display | 0.0306 |
2 | Central control room | 0.0954 | 12 | Compressor | 0.0427 | 22 | Stop | 0.0304 |
3 | Coke oven gas | 0.0795 | 13 | Load | 0.0393 | 23 | Pressure relief | 0.0304 |
4 | Interlock | 0.0729 | 14 | Liquid level | 0.0390 | 24 | Supercharger | 0.0304 |
5 | Gasifier | 0.0604 | 15 | Slag lock bucket | 0.0376 | 25 | Synthesis | 0.0300 |
6 | Scheduling | 0.0544 | 16 | Running | 0.0372 | 26 | Close | 0.0300 |
7 | Workshop | 0.0497 | 17 | Work | 0.0371 | 27 | Methanol | 0.0296 |
8 | Notice | 0.0490 | 18 | Pressure | 0.0365 | 28 | Main operation | 0.0289 |
9 | Induced draft fan | 0.0447 | 19 | Overhaul | 0.0320 | 29 | Water seal | 0.0286 |
10 | Reactor | 0.0441 | 20 | Flow | 0.0313 | 30 | Check | 0.0285 |