Based on determination of the kinetic model equation of TPD,a new simulation method used to characterize the surface acid strength was developed by using one group of TPD experimental data.

On the methods to increase the surface strength of finished paper;

Effects of wetting rate on soil surface strength and aggregate stability;

The effect of fiber composition and beating process on surface strength of off-set printing paper;

The results showed that the pore structure and surface acidity of carrier were affected by treating time,space velocity and calcination temperature evidentially.

The results showed that the F-existing on the the surface of catalyst changed the surface acidity,increased the amount of absorbed organism.

Study on surface acidity of Al_2O_3 by base gas adsorption and TPD method;

The surface acidity was determined by Hammett indicator meth.

Cluster models of pure SiO2 and SO2-4/SiO2 were built up,and density functional theory calculations on pyridine adsorption were carried out to analyze the surface acidity of SO24/SiO2.

The acidity of hydrogen fluoride solution is different between its high concentration and its low concentration.

In this work,a linear regeession equation of the relationship between acidity PK a?and topological index Y of hydrides is obtained: PK a=34.