FOREST RESOURCES WANAGEMENT ›› 2021›› Issue (2): 75-82.doi: 10.13466/j.cnki.lyzygl.2021.02.011
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WU Xuping1(), LV Yong1, ZHANG Xiongqing2, YI Xuan3, ZHU Guangyu1(
)
Received:
2020-12-31
Revised:
2021-03-15
Online:
2021-04-28
Published:
2021-06-03
Contact:
ZHU Guangyu
E-mail:2601405038@qq.com;zgy1111999@163.com
Tab.3
Basic models candidates
序号 | 模型名称 | 表达式 |
---|---|---|
M1 | 理查德(Richards) | G=a×(1-e(-b×T))×(SDI/1000)c |
M2 | 理查德(Richards) | G=a×(1-e(-b×T))×(N/1000)c |
M3 | 舒马克(Schumacher) | G=a×e(-b×T))×(SDI/1000)c |
M4 | 舒马克(Schumacher) | G=a×e(-b×T))×(N/1000)c |
M5 | 舒马克(Schumacher) | G=HT(a+b/T)×(SDI/1000)(c+d/T)×e(q+w/T) |
M6 | 舒马克(Schumacher) | G=HT(a+b/T)×(N/1000)(c+d/T)×e(q+w/T) |
M7 | 舒马克(Schumacher) | G=e(a+b/T)×(SDI/1000)c+d/T |
M8 | 单分子(Mitscherlish) | G=a×(1- |
Tab.5
The fitting results of candidate basic models
模型 | a | b | c | d | q | w | R2 | P/% | MAE | RMSE |
---|---|---|---|---|---|---|---|---|---|---|
M1 | 12.455 | 473.41 | 0.8146 | — | — | — | 0.6376 | 97 | 3.61 | 4.85 |
M2 | 20.551 | 472.66 | 0.3863 | — | — | — | 0.2187 | 95 | 6.16 | 8.01 |
M3 | 19.143 | 9.3464 | 0.8945 | — | — | — | 0.7118 | 97 | 3.63 | 4.86 |
M4 | 33.455 | 9.9705 | 0.4674 | — | — | — | 0.2982 | 95 | 5.76 | 7.59 |
M5 | 1.4039 | -17.978 | 0.8222 | 0.8792 | -0.3722 | 33.868 | 0.7636 | 97 | 3.08 | 4.40 |
M6 | 1.7490 | -20.861 | 0.0382 | 8.3653 | -0.3535 | 34.106 | 0.4226 | 95 | 5.12 | 6.88 |
M7 | 2.9448 | -9.9929 | 0.9145 | 10.881 | — | — | 0.7119 | 97 | 3.62 | 4.86 |
M8 | 61.762 | 0.0088 | 1.3313 | — | — | — | 0.7014 | 97 | 3.84 | 4.95 |
Tab.6
Nonlinear mixed-effect model fitting based on site type
随机效应 | 添加位置 | a | b | c | d | q | w | AIC | BIC | R2 |
---|---|---|---|---|---|---|---|---|---|---|
ST | a | 1.205 | -13.66 | 0.731 | 2.906 | 0.175 | 22.03 | 877.41 | 901.49 | 0.8857 |
ST | b | 1.254 | -14.49 | 0.772 | 2.324 | 0.035 | 24.29 | 877.91 | 901.99 | 0.8794 |
ST | c | 1.212 | -13.81 | 0.762 | 2.566 | 0.119 | 22.90 | 872.41 | 896.50 | 0.8951 |
ST | d | 1.286 | -15.12 | 0.818 | 1.686 | -0.091 | 26.51 | 873.88 | 897.97 | 0.8871 |
ST | q | 1.256 | -14.68 | 0.749 | 2.594 | 0.044 | 24.62 | 879.17 | 903.26 | 0.8785 |
ST | w | 1.306 | -15.57 | 0.786 | 2.037 | -0.099 | 27.07 | 879.65 | 903.74 | 0.8713 |
Tab.8
Fitting of nonlinear mixed effects model based on site type group
随机效应 | 添加位置 | a | b | c | d | q | w | AIC | BIC | R2 |
---|---|---|---|---|---|---|---|---|---|---|
STG | a | 1.009 | -10.04 | 0.573 | 5.879 | 0.790 | 10.76 | 750.45 | 774.53 | 0.9200 |
STG | b | 1.001 | -9.711 | 0.560 | 6.431 | 0.856 | 8.837 | 754.69 | 778.77 | 0.9175 |
STG | c | 1.166 | -12.41 | 0.613 | 5.298 | 0.359 | 17.33 | 749.40 | 770.48 | 0.9202 |
STG | d | 1.127 | -11.53 | 0.621 | 5.426 | 0.463 | 14.85 | 773.59 | 797.67 | 0.9056 |
STG | q | 1.044 | -10.56 | 0.560 | 6.097 | 0.724 | 11.68 | 751.93 | 776.01 | 0.9192 |
STG | w | 0.995 | -9.508 | 0.551 | 6.564 | 0.883 | 8.126 | 758.42 | 782.51 | 0.9156 |
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