“variace-covariance matrix”的概念、定义、翻译、参考文献-科学参考

单词	variace-covariance matrix
释义	variace-covariance matrix Encyclopedia 工学精度释 variace-covariance matrix方差-协方差矩阵随机变量的方差和协方差的集合。是以随机变量的方差为主对角元素，随机变量间的协方差为非主对角元素构成的一个对称方阵。
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