Then a scheme of limited thrust guidance with virtual reentry point compensation was put forward to eliminate planning error and the selection of shutdown parameter was analyzed briefly.

By using the modern computer science,classical ancient books can be transformed into ancient book database to realize the share of ancient resource and the virtual reappearance of ancient book - storage buildings.

The text calculates the executives’number of shares by EVA(Economic Value Added) created by the executives, and then the exectives gain virtual shares.

Road network model based on virtual node joint;

Study on road network model based on virtual node joint

A method on uncertainty knowledge representation is proposed by introducing the concept of virtual node into the Bayesian network while retrieving the land surface vegetation parameters.