Study on the instant message presence service based on IMS

A CAPP software package is developed with three layer structures (the database, the Web server and the client server) to realize CAPP online services.

Based on the ant colony optimization,a new algorithm is proposed for the project risk programming of online services enterprise.

Personalized on-line service based on classification algorithm of crystalline increment;

The paper gives out a brief introduction of concept and meaning of information diathesis, illustrates the basic requirements for on-line serviced librarian and presents the means and methods to optimize the information diathesis of on-line serviced librarian.