RANDN (n) is an N-by-N matrix with random entries, chosen from a normal distribution with mean zero, variance one and standard deviation one.

是一个n - n矩阵随机作品，选自正态分布均值为零，方差一个标准偏差为一。

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The relative standard deviation (RSD) of this method is less than 5 % and this method has been used to determine trace amounts of n...

该方法用于聚氨酯中微量游离异氰酸酯基的测定，相对标准偏差小于5%，具有简便、快速、准确、可靠的特点。

youdao

The relative standard deviation (RSD) of this method is less than 5 % and this method has been used to determine trace amounts of n...

该方法用于聚氨酯中微量游离异氰酸酯基的测定，相对标准偏差小于5%，具有简便、快速、准确、可靠的特点。

youdao