当射线源比较弱、探测器探测效率低时，常常显示出统计起伏的现象。
The statistical fluctuation phenomenon will appear when the radiation source is relatively weak or the sensitivity of the detector is low.
为了克服自然伽马测井时，由于统计起伏所造成的测量曲线重复性误差而设计制造HB97型测井仪。
HB97 bigger crystal nature gamma logging tool is designed for overcoming logging curve repeating errors due to statistical variation.
本文介绍了用阶乘矩能够消除统计起伏，证明引入累积变量后可使粒子数的分布变得均匀；给出了消除粒子间关联效应的方。
The method of removing statistics fluctuation with factorial moment was introduce and the cumulant variable able to even for distribution of multiparticle production was proved.
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