hyperbolic secant distribution造句

Ding ( 2014 ) shows three occurrences of the Hyperbolic secant distribution in statistical modeling and inference.
A random variable follows a hyperbolic secant distribution if its probability density function ( pdf ) can be related to the following standard form of density function by a location and shift transformation:
The hyperbolic secant distribution shares many properties with the standard normal distribution : it is symmetric with unit variance and zero leptokurtic; that is, it has a more acute peak near its mean, and heavier tails, compared with the standard normal distribution.
It's difficult to find hyperbolic secant distribution in a sentence. 用hyperbolic secant distribution造句挺难的