The idea that structures are divided into different layers and substructures are synthesized layer by layer is put forward for a branch shafting system.

The pattern of magnitude distribution is characterized proximately by northeastern zones along Tangshan-Guye,Tangshan-Douhe,which correspond to the NE Tangshan fault belt.

This paper analyzes the relevant contents of forest land quality classification and evaluation,inquires into technology of forest land assessment based on forest land classification,and then studies technical framework on forest land classification and evaluation.

Finally,it is of realistic and practical significance to apply the evaluation conclusion mentioned above to security-level classification.

Along with the development of periodical undertaking and the increase of kinds of periodical in China,the department of books and intelligence,the periodical circle,the academic circle and the readers more and more pay attention to the grade division of the periodicals from objective,publish about 400 theory research paper about the grade division of the periodicals and some research results.

A framework of hiberarchy trusted network based on the grade division was put forward,and the partition rules of trusted attributes as well as the methods of grade division were explained in detail.