Focusing on the problem that current dynamic trust aggregation algorithms searching for feedback trust information is based on trust chain in broadcast way,leading to slow in convergence and bad in scalability,a new scalable feedback trust information aggregation algorithm is proposed,in which the concept and definition of direct trust tree(DTT) are presented.

subjective trust) as the background in the open network,this paper proposed a subjective trust valuation model,provided the concrete and reasonable formula of direct trust and recommendation trust valuation and the other solutions,which had solved the valuation of subjective trust.

This paper,beginning from trust relation between entities\',takes the trust domain as research range,quantifies the direct trust between entities and improves and designs it on the basis of Bayesian.

The definition is made on the administrative legal responsibility; an analysis is made on the types of the subject of the administrative legal responsibility; the focus is on the conditions under which the public officials undertake the responsibility as well as on the distinction between direct responsibility and indirect responsibility.