This should only be calculated if the particle size distribution curve is reasonably straight between 10% and 90%, showing that the aerosol is log-normally distributed. Where a straight line is a good fit to the data, the calculation of GSD is performed by noting the particle size X at which the line crosses the 84.13% mark and the particle size Y at which the line crosses the 15.87% mark.
是解释曲线图的,不明白准确意思,讲一下意思就行。
the line crosses the 15.87% mark.这个怎么理解?