A new method for unbiased estimating standard deviation of strength of concrete of inspected lot is proposed in this paper.

给出了一种混凝土验收批强度标准差的无偏估计方法。

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A new method for unbiased estimating standard deviation of strength of concrete of inspected lot is proposed in this paper.

给出了一种混凝土验收批强度标准差的无偏估计方法。

youdao