Research on Deformation Prediction of Foundation Pit Based on PSO-GM-BP Model

Table 14

Comparison of three models.

Period	Actual value	Predicted value
		PSO-GM (1, 1)	PSO-BP	PSO-GM-BP
13	31.23	31.9099	31.1965	31.2924
14	31.92	32.5515	31.6132	31.8863
15	32.44	33.1876	32.1754	32.5039