Without a trusted center and modifying the shares of old participants,the protocol needs that t(t is the threshold) old participants cooperate to generate and to distribute the new share,and there are only 6t times broadcasting.

Without having a trusted center, the protocol only requires t (t is the threshold) participants?cooperation and 6t times broadcasting to generate and to distribute the new share.

The essay proposes a model of resource pooling management for virtual business based on trust governance center, through which, the author believes, coordinate management of and control over the resources among its members could be realized.

The method centers on cost program,achieves particular cost control of all process,and fulfills performance evaluation based on responsibility center.

Secondly, the thesis clearly introduces the steps of establishing responsibility center, and especially shows the disadvantages of traditional dividing responsibility center, then further differentiates responsibility center according to enterprise s value chain again.

The main work of constructing enterprise s budget executing organization is to build enterprise budget responsibility network composed of all kinds of responsibility centers.

It also gives a further definition of the central task facing both the teachers and the students;the duty and role that teachers should take and play in class;the concrete ways and procedures for teaching renovation are also provided herewith.

After China s entry into the new period,in the primary stage of socialism,with regard to the general problem of developing the productivity and realizing the modernization,Deng Xiaoping raised defi- nitely that the central task of the national work is economic development and the all-round realization of the national development.