| 参数 | 值 | 参数 | 值 | 参数 | 值 | 
| booster | gbtree | max_depth | 5 | lambda | 0.01 | 
| n_estimator | 42 | min_child_weight | 7 | alpha | 0.87 | 
| eta | 0.13 | subsample | 0.6 | objective | reg:linear | 
| gamma | 0 | colsample_bytree | 0.3 | 
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