摘要
对数正态分布是介于Г─分布和正态分布之间的重要分布律，在地质科学中有着广泛的应用；本文计算了对数正态分布的数学期望、方差和极大值，并讨论了对数正态分布的成因．
Logarithmi nomal distribution is between p-distribution and nomal distribution. It is avery lmportant distrlbution in earth science. Logarithmic nomal distribution is widely used inmany branches of earth science. The author has computed mathmatical expectation, varianceand maximum of logarithmic nomal distribution. In addition,the genesis of logarithmic nomaldistribution has been discussed.
关键词
对数正态分布
数学期望
方差
地质学
密度函数
logarithmic nomal distribution
mathmatical expectation
variance
maximum
