Reviewing the population exposure risk model,this paper develops two renewed models from it under the accident graduation,and verifies three axioms to them.

The results show it's difficult to improve the electrical conductivity by using routine method, but after deformation, the alloy that is done with classified aging can meet the requirement.

A novel real-time classification video retrieval system based on HSI model is presented.

In the practice,the anti-takeover provisions that have been widely used include staggered board provision and restrictions provision on the qualifications of directors,super-majority provision and other provisions were not applied.

Presently,anti-takeover clauses in China mainly include "super majority" clause,"staggered board" clause and clause which imposes restrictions on the qualifications of the directors,although the current legislations in China do not specifically cover the anti-takeover clauses.