灰色模型 | 灰色马尔科夫模型 | ||||
年份 | 实际产量/万吨 | 预测产量/万吨 | 相对误差 | 预测产量/万吨 | 相对误差 |
2004 | 87.1700 | 87.1700 | 0.0000 | ||
2005 | 95.9600 | 57.4727 | 0.4011 | 90.4440 | 0.0575 |
2006 | 109.1900 | 65.5319 | 0.3998 | 103.1268 | 0.0555 |
2007 | 111.1940 | 74.7213 | 0.3280 | 117.5880 | 0.0575 |
2008 | 110.9470 | 85.1992 | 0.2321 | 104.8219 | 0.0552 |
2009 | 114.7515 | 97.1465 | 0.1534 | 119.5208 | 0.0416 |
2010 | 117.2088 | 110.7691 | 0.0549 | 114.2480 | 0.0253 |
2011 | 121.8091 | 126.3019 | 0.0369 | 122.5697 | 0.0062 |
2012 | 139.8893 | 144.0129 | 0.0295 | 139.7573 | 0.0009 |
2013 | 159.2306 | 164.2075 | 0.0313 | 159.3551 | 0.0008 |
2014 | 187.3402 | 187.2339 | 0.0006 | 193.1142 | 0.0308 |
2015 | 216.8851 | 213.4892 | 0.0157 | 220.1941 | 0.0153 |
2016 | 235.8412 | 243.4262 | 0.0322 | 236.2329 | 0.0017 |
2017 | 280.1365 | 277.5612 | 0.0092 | 286.2784 | 0.0219 |
2018 | 369.0110 | 316.4829 | 0.1423 | 389.3736 | 0.0552 |
2019 | 441.9843 | 360.8625 | 0.1835 | 443.9745 | 0.0045 |