The key problem in the numerical simulation is how to transform the given peening parameters into the equivalent nodal forces, which is solved by the equivalent deformation method proposed by the author.

In this paper, a method of determination of equivalent suction based on the principle of equivalence of deformation and the stress-strain curves obtained by triaxial compression tests of intact saturated and unsaturated loess is proposed.

Based on the equivalence principle and the reciprocity theorem, the multiple scattering up to Nth-order by N parallel 2-D targets arbitrarily located in a plane wave/Gaussian beam is considered.

A new equivalence principle of current control for shunt active power filters is introduced, which having no use for measurement of harmonic and reactive currents of nonlinear loads.

In accordance with Landau s thinking, on the basis of the principle of equivalence, from the gravitational field equation, we have rigorously reconsidered the concrete deductive process of the expression of energy-momentum pseudotensor of the pure gravitational field and the result is in good agreement .