Study on application of N catalyst for propylene polymerization I. Effects of pre-polymerization and pre-compounding on the polymerization of propylene with N catalyst;

In this paper,the Envelope Forecast Method is used in the traffic flow prediction.

With the status of electrical and electronic experimental teaching centre,we design and develop a system of web precontracting on experi-mental teaching,which has played a significant role in experimental teaching.

Mobile Agent-based Multilayer Distributed Intrusion Detection Network Warning System;