Modelling and Simulation in Engineering

Research Article

A New Approach to Improve Accuracy of Grey Model GMC in Time Series Prediction

Table 4

Comparison of actual values, model values, and APE of D-GMC and modified GMC models.
YearsElectricity consumption dataD-GMCModified GMC
Model value APEModel value APE
20021100,091100,091.000.000100091.000
20032106,987105,968.820.952106987.174.11 × 10−12
20043115,101117,863.182.400115101.151.29 × 10−11
20054121,240119,605.491.348121240.031.28 × 10−11
20065127,879127,053.810.645127879.261.25 × 10−11
20076133,113132,870.660.182133112.821.24 × 10−11
20087135,520137,355.471.354135520.311.24 × 10−11
20098135,181134,748.540.320135180.801.22 × 10−11
20109149,301148,048.600.839149301.141.15 × 10−11
201110148,855149,991.010.763148855.541.28 × 10−11
201211161,779169,923.115.034159807.951.22
201312164,341161,959.151.449164233.190.07
201413168,620165,305.301.966163396.003.10
Prediction.