Table 7 Cloud digital characteristics of different data sources.

From: A collapse risk assessment method for subway foundation pit based on cloud model and improved Dempster–Shafer evidence theory

Data source

Evaluation interval

Cloud digital characteristics (Ex, En, He)

Survey and design (E)

Site inspection (F)

Video monitoring (H)

[0.0, 2.5]

(1.25, 1.062, 0.01)

[2.5, 5.0]

(3.75, 1.062, 0.01)

[5.0, 7.5]

(6.25, 1.062, 0.01)

[7.5, 10]

(8.75, 1.062, 0.01)

Instrument monitoring (G)

[0.0, 0.6]

(0.30, 0.255, 0.01)

[0.6, 0.8]

(0.70, 0.085, 0.01)

[0.8, 1.0]

(0.90, 0.085, 0.01)

[1.0, 1.2]

(1.10, 0.085, 0.01)