In this study,soil formation rates(SR) of the purple soils(a Regosols) in the hilly area of Sichuan,China were determined by Barth equation(SR-estimated) and field measurements(SR-measured) with the three treatments of soil types(J1s,J3s,and J3p soils),vegetations(wheat-maize,loquat tree,and ryegrass),and soil depths(10,20,40,and 60 cm).

The indexes are used to control the fill rate of embankment in order to assure embankment construction quality.

crystallization kinetics was studied for dipentaerythritol and pentaerythritol by analyzing the nexus of crystal size and crystal population density and the nexus of crystal growth rate and nucleation rate.

The nucleation rate indicated by inducement temporal hour was measured.

The nucleation rates exceeding 10 35 m -3 s -1 were determined in molecular dynamics simulations at 300K to 600K for the freezing of molten (RbCl) 108 clusters.

The results demonstrate that the formation rate of CO2 hydrate is rather slow in a quiescent system without surfactant,and hydrates are formed only at the gas-water interface.

Then the data were analyzed combined with the calculation theories of hydrate's induction time,formation rate and void fraction.

This paper analyzes the mechanism of methyl acetate formation, the influencing factors of ester formation rate in the terephthalic acid production process, and also analyzes the improvement of Amoco process variables.