There is a wide range of particle sizes which approximate the log normaldistributionlaw.
实验发现 ，颗粒粒度的分布服从对数正态分布规律。
2
For products without historical data, this paper gives the minimum decision values based on normaldistributionlaw and practical experience.
对没有历史资料的产品开发的决策，本文按正态分布规律并结合实践也给出了可开发的最低决策值。
3
The paper points out that the finish error of blades does not conform to normaldistributionlaw, hence the error probability distribution function is derived for this specific process.