Based on the qualitative analysis to inverse dynamics of delay system, through modifying conventional fuzzy controller, a new control method which is fit for delay system is presented.

In conventional test data analysis, a qualitative method is often used, in which modes of data display are different, thus different test conclusions will be obtained.

Owing to a small fluid flowing rate, it is difficult to measure and interpret the physical parameters of low permeability tight rocks by use of conventional core analysis method.