The industrial production, especially the contemporary Hi-tech economy, is featured by a comprehensive penetration of science into production with the shift of knowledge-scarce production to knowledge-intensive production.

The phase penetration is analyzed for the reflection delay on the Distributed Bragg Reflectors(DBRs)from the new vertical-cavity semiconductor optical amplifiers (VCSOAs)symmetrical model.

To judge the safety rank of Yunlong Reservoir during the first storing-up period,based on the data monitored from the beginning of the project to the time when the water level reached the normal water level,the seepage pressure,seepage water level,seepage around the dam abutment and seepage discharge of the dam are analyzed in this paper,and seepage lines are also drawn.