Research Article
An Improved Nonlinear Grey Bernoulli Model Combined with Fourier Series
Table 1
Forecasted results from the grey models.
| | Original value | GM (1, 1) |
Optimized GM (1, 1)
|
Original NGBM (1, 1)
, |
Optimized NGBM (1, 1)
, |
F-NGBM (1, 1)
, | | | | | MAPE (%) | | MAPE (%) | | MAPE (%) | | MAPE (%) | | MAPE (%) |
| | 5 | 5 | 0 | 5 | 0 | 5 | 0 | 5 | 0.1 | 5 | 0 | | 6 | 5.084 | 15.26 | 5.488 | 8.527 | 6.499 | 8.31 | 6.00 | 0.00 | 6 | 0 | | 4 | 5.634 | 40.86 | 5.866 | 46.66 | 4.921 | 23.03 | 4.828 | 20.70 | 4 | 0 | | 7 | 6.920 | 10.80 | 6.271 | 10.42 | 6.986 | 0.2 | 6.946 | 0.77 | 7 | 0 | | MAPE (%) | | | 16.73 | | 16.42 | | 7.89 | | 7.16 | | 0.00 |
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