Trust value calculation in domains based on grid environment

In order to achieve a reasonable evaluation of direct trust, this paper proposes a trust evaluation algorithm based on the domain, using the technique of constructing a hierarchical tree of trust evaluation subjectively. The algorithm adopts the rules of series and parallel operations in the D-S theory, acquires the results of the recommended trust problem of a single path by quadrature methods and implements the integration of multiple paths by the weighted algorithm which takes the cooperative roles and industry roles as factors. The algorithm can effectively avoid the phenomenon of a single node´s weight being too heavy and unfair treatment on recommended resource nodes and realize the trust value computation.