Because of the price bottle-neck,efficiency of the auctions is affected by the price bottle-neck very much,this paper presents a new secure efficient electronic auction using knapsack theory and secret sharing scheme.

Based on its own structure information restriction and the restriction conditions of inclusion principle of large scale systems,a new decomposing method is presented.

A new strategy for choosing overlapping decomposition complementary matrices is presented in the framework of the inclusion principle,and the influence of different complementary matrices to control performances is analyzed.

By means of the restriction conditions of the system inclusion principle and LQ optimal control algorithm,a decentralized control based on the two single-area subsystems is proposed for two-area overlapping interconnected power system .

Directed toward it’s defects,we put forward a plan which is based on envelope principle to variate gear form ,obtain dedendum transition curve of greater trochanter which is based on envelope p.