英语词汇variance of sum怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

1
?总和方差
... 方差-协方差矩阵 variance-covariance matrix 总和方差 variance of sum 带间方差 between-zone variance ...

1
The optional polynomial order is selected through the test of the partial fitting square sum on the basis of the variance analysis of the fitting equation.
对拟合方程进行方差分析并在此基础上利用偏拟合平方和的检验确定拟合多项式的最佳阶数。
2
It is proved that the combining ridge and principal components regression have the minimum variance sum in the class of reduced-dimension estimators.
证明了在一类岭型降维估计中，岭型主成分估计的方差和最小。

单词	variance of sum
释义	variance of sum 简明释义和方差网络释义 1 ?总和方差 ... 方差-协方差矩阵 variance-covariance matrix 总和方差 variance of sum 带间方差 between-zone variance ... 双语例句 1 The optional polynomial order is selected through the test of the partial fitting square sum on the basis of the variance analysis of the fitting equation. 对拟合方程进行方差分析并在此基础上利用偏拟合平方和的检验确定拟合多项式的最佳阶数。 2 It is proved that the combining ridge and principal components regression have the minimum variance sum in the class of reduced-dimension estimators. 证明了在一类岭型降维估计中，岭型主成分估计的方差和最小。
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