Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of the fitting and predicting MAPEs of the previous and proposed GM(1,1) models.
| GM(1,1) | Fitting MAPEs (rank) | Predicting MAPEs (rank) |
|---|---|---|
| Typical GM(1,1) | 4.399448 (4) | 5.040509 (4) |
| Previous model 1: GA-Based GM(1,1) | 3.603791 (1) | 4.840301 (3) |
| Previous model 2: GM(1,1;λ) with constrained linear least squares | 4.182273 (3) | 3.296336 (1) |
| Proposed GM(1,1) | 4.090405 (2) | 3.775669 (2) |
