It realizes the function of material processing by employing the technology of dictionary strengthening automatically and material matching,and uses the technology of B_tree dynamic index to realize language material retrieval and the functions of statistics and analyses,which cut down the time spending on retrieval.

Based on the influence from human to data,a non-uniform data accessing conception,dynamic index and buffer pool basing on attention degree were put forward,and a double-index application pattern was designed.

This paper introduces the three coloring problem,expounds upon backtracking algorithm and static search tree,puts forward the concept of dynamic search tree,and proposes a backtracking algorithm based on a dynamic search tree.

Practical Certificate Revocation System Based on B_tree

A Temporal Data-Model based on Dynamic- Multilevel Index and Two-way Chain Technology;

The model,using technology of version management-dynamic correlation and dynamic hierarchy index,realizes the storage management and inquiry for temporal geographic data.