The precision of an analytical procedure is usually expressed as the standard deviation or relative standard deviation (coefficient of variation) of a series of measurements.

分析规程的精密度通常以一系列测量数值的标准差或相对标准差(变异系数)来表示。

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A function of probability distribution of fading is derived and the deviation coefficient and probability coefficient of field strength are obtained.

并研究场强沿铁路的起伏规律，导出场强起伏的概率分布函数，得到场强偏差系数和概率系数。

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It has also been shown that this deviation is more than just addition of linear loss coefficient especially when long haul fiber optic systems with inline amplifiers are considered.

同时也显示出，该结果的背离不仅仅是线性损耗系数的简单叠加，特别是在长久光纤系统中存在同轴信号放大器的情况下。

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Once you know the average return, the standard deviation of each index and the correlation coefficient between each pair of indexes, the rest is math.

FORBES: Asset Allocation and the Efficient Frontier