The inherent structure theory of networks and concentrated ordering of lumping fuzzy suggestions are combined to solve the centralized placement of multi-branch filter.

This paper expounds the three levels of the integration of fixed network and mobile network, introduces the main functions of IMS (IP Multimedia Subsystem), compares IMS with soft switch, and researches the strategies and steps of the integration of China Telecom network base on IMS.

In future, the mixture of 3G and fixed network are also an inevitable trend.

The radial distribution function of nitrogen-nitrogen atoms calculated by molecular dynamics simulation was used as the criterion for the homogeneity of the solidified product, and it is indicated that the product made by the partial mixing shows better homogeneity than that by the full mixing.