A simplified way of calculation based on the concept of equivalent regular wave was proposed for calculation of the combined stressinduced damage to the longitudinal structures during overal longitudinal bending of ship.

According to the requirements of social network structure analysis,the group analysis method based on regular equivalence group and the force-directed layout algorithm based on group and role analysis under this ontology model have been presented.

From frequency equation represented by flexibility matrix,according to equivalent rules of equal structure period,total base shear and top-point displacement,three-degrees equivalent model for regular high-rising isolated structure was deduced,and simplified computing formula for model parameters has been given after numerical analysis.

Pragmatic Markedness Equivalence Principle——On New Development of Translation Theory;