Research Article

Prediction of Water Consumption in Hospitals Based on a Modified Grey GM (0, 1∣sin) Model of Oscillation Sequence: The Example of Wuhan City

Table 2

The predicted values by different models and their relative error.

Time IDActual valueGM (0, 1∣sin) modelModified GM (0, 1∣sin) model
Predicted valuesRelative error (%)Predicted valuesRelative error (%)

1264.3264.30.00264.30.00
2327.1295.4−9.69302.1−7.64
3317.6280.8−11.59284.4−10.45
4286.2293.62.59300.14.86
5292.2300.42.81308.55.58
6300.5291.4−3.03297.6−0.97
7324.4320.1−1.33333.12.68
8300.1291.6−2.83298.0−0.70
9360.0336.8−6.44354.3−1.58
10328.5296.6−9.71304.4−7.34
11368.9347.8−5.72368.5−0.11
12307.6307.60.00318.23.45

MAPE (%)4.643.77

0.630.68