The article describes reservoir macroscopic heterogeneity with statistical method,logarithmic normal curve method and Lohreng curve method.

To analyze these two important factors at the same time,this paper uses the Lognormal distribution curve as the income distribution curve to establish a vehicle ownership forecast model.

Based on the classical demonstration methods of GJB,fuzzy demonstration of maintainability index is offered,and fuzzy hypothesis test for the parameter of lognormal distribution is studied.

This article is aimed to describe the distribution figure on the frequency histogram of geotechnical parameters which obey lognormal distribution,the method of normal checking on the cumulative frequency probability grid paper as well as the statistical method for finding characteristic figure values of parameters,and finally to make the statistics of geotechnical parameters more rational.

They also have suggested that the lognormal distribution of quantitative trait would be more reasonable.

With the help of the large quantity of flight data,We research the distribution of the compared damage that was caused by flying,consist of normal,lognormal and weibull distribution.

Odd-even steps interpolation algorithm for logarithmic curve in multi-axis control;

The research results show that the triaxial frost heaving stress-strain curve can be fitted with a logarithmic curve,and test-force-ring stiffnes,initial axial pressure and confining pressure have a great effect on the frost heaving stress and strain of frozen saturated clay.