Safety Early Warning Research for Highway Construction Based on Case-Based Reasoning and Variable Fuzzy Sets

Table 2

Historical data sheet.

Project number	Warning degree	Workload when working at height	Safety protection level	Engineering geological conditions	Installation and usage of machinery	Workers without safety training	Organizational ability	Safety material status
1	2	0.3	82	2	82	0.14	68	1
2	2	0.38	64	0	72	0.15	84	1
3	1	0.2	73	2	93	0.11	84	1
4	1	0.34	83	2	91	0.12	82	2
5	2	0.22	74	0	94	0.1	88	2
6	1	0.32	94	2	95	0.2	80	2
⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮
30	1	0.34	85	2	83	0.12	79	0
31	2	0.35	65	2	81	0.08	70	2
32	1	0.3	90	1	85	0.15	88	2
33	2	0.35	72	1	72	0.14	65	1
34	1	0.22	68	1	85	0.04	88	1
35	1	0.25	85	2	80	0.12	85	1
36	2	0.35	70	1	68	0.14	70	1