Image analysis by Hahn moments of two variables;

Generalized variational principles with two kinds of variables of initial value problems in general mechanics;

By using "the method of two-variable"and introducing four small parameters, the problem of the non-linear unsymme trical bending for cylindrically ortropic circular thin plato with linear vari able thickness is studied, and the uniformly valid asymptotie soltion of Nth order for ε1 and Mth-order for ε2 is obtainod.

Dual Structure, Two Cost-ignoring, Two Variables and Peasant Issue of Ancient China: A Study of the Relationship between State and Peasant in Ancient China;