In the measurement of low-level radioactivity, instead of Poisson distribution, a negative binomial distribution is proposed to denote the probability distribution of actual counts.
在低水平放射性测量中，建议采用负二项式分布代替泊松分布来描述真实测量计数的几率分布。
It is necessity that stratified sampling is used to investigate to the trees and the new stumps, and the spatial distributing pattern of the red turpentine beetles was Negative Binomial Distribution.
红脂大小蠹寄生的树木和新伐桩有分层抽样的必要及其空间分布格局经拟合为负二项聚集分布。
The results are as follows: The distribution pattern of larvae is aggregative ( negative binomial distribution) . The aggregation dose not change with the densities of population of leaf miner.
结果表明：烟草潜叶蛾幼虫在田间呈聚集分布，聚集强度不因种群密度的改变而改变。
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