Table 8 Comparison of construction cost prediction results of different models.
Month | True value | SSA-PGNN prediction value | SSA-BP prediction value | PGNN prediction value |
|---|---|---|---|---|
3 | 263,324.88 | 265,356.00 | 274,987.44 | 272,039.04 |
4 | 44,951.66 | 44,975.43 | 46,698.14 | 46,406.48 |
5 | 37,861.71 | 38,043.00 | 39,309.70 | 39,303.79 |
6 | 42,269.57 | 42,449.07 | 43,860.44 | 42,221.06 |
7 | 215,982.71 | 219,069.40 | 225,061.55 | 223,178.05 |
8 | 230,316.48 | 226,773.60 | 240,520.56 | 237,943.92 |
9 | 302,193.60 | 304,266.00 | 315,579.42 | 312,197.64 |
MAPE | 2.99% | 3.88% | 5.15% | |
R2 | 0.9819 | 0.9643 | 0.9290 | |
RMSE | 0.1358 | 0.1683 | 0.2041 | |
