It is thought that the independent equation of the boundary relation in the frequency-domain is composed of two curl equations and the charged continuity equation of the boundary relation.

This paper makes an analysis on the relation of the stress boundary with the critical tangential compressive stress as well as on its influence on critical internal wrinkling.

Based on the Neoinstitutional Theory. This article analysis the transactions cost, and try to explore the relation contract cost and the boundary of the contract.