Research on the Prediction of the Water Demand of Construction Engineering Based on the BP Neural Network

Table 8

Calculation results with different numbers of input variables.

Input variables	Average error (%)	Maximum error (%)
r1, r2, r4, and r5	4.06	4.74
r1, r2, and r4	7.43	10.15
r1, r2, and r5	9.55	14.28
r1, r4, and r5	8.90	15.69
r2, r4, and r5	7.05	12.73
r1, r2, r3, r4, and r5	3.67	4.21
r1, r2, r3, r4, r5, and r6	3.31	3.96