First,the nature of the interactions at the basic level is decisive to the form at the systematic level,and the form plays reactive functions for the initial level of the production relations.

The economic and political conditions determine that the construction of the central villages should be taken as the basic level of township.

the basic level and the target level.

Reliability calculation of the urban road network based on hierarchical network

Study of hierarchical network model of bluetooth scatternet

The major characterizations of hierarchical network and basic structure of space-based information network are introduced.

In view of problem that existed in the current network foundation lesson teaching of the vocational high schools, such as: Students character is low, disobeying the discipline at class, the teaching quantity is difficult in guarantee, the teacher teaches while the students play at class, the teaching efficiency is low, etc, which cause the teacher cannot finish the teaching task.