Calculates the linear regression of a set and returns the coefficient of determination, R2. 对集进行线性回归计算,并返回确定系数R2。
BNC was positively correlated with alkaline hydrolysable for all treatments,but the coefficient of determination(R~2)is lower than 0.400 0. 江苏省196个田块土壤碱解氮含量与基础供氮量呈现出线性正相关的趋势(R2<0.
After we training and testing water level forecasted model, the average coefficient of determination (R2) of water level at three hour later is 0.918, the root-mean square error (RMSE) is 0.319m. 水位预测模式经过训练与测试之后，预测未来3小时的变化，其平均判定系数R2为0.
In the condition of the same premium and premium rate, the adjustment coefficient of stop-loss reinsurance can't bo smaller than other reinsurance's adjustment coefficient. 另外在保费和费率相等的前提下，停止损失再保险的调节系数不可能比其他再保险方式的调节系数小。