In order to adapt to the complicated mobile multicast environment,this paper brings forward a priority-based datagram management mechanism which endues different datagram with different priorities,and advances an adaptive mobile multicast protocol for the network based on the hierarchical architecture.Adopt bi-directional tunneling mechanism in the subnet and adopt the integration of bi-directional tunneling and remote subscription in the region.The protocol can deliver the datagram reliably and efficiently,and it also can get a balance between the shortest delivery route and the reduction of multicast tree’s reconstruction cost.

This paper brings forward a strategy to meet the high demand for reliability in the field of power grid’s main- tenance scheduling arrangement. The technologyof artificial intelligence expert system is used to solve the non-algorithm problem. Frame representation is used to describe the knowledge of the power grid’s structure and production is used to represent the power grid’s special rule. In order to implement the intelligent analysis, to optimizethe time of maintenance, to avoid the collision caused by device’s maintenance and to ensure the maintenance scheduling scientific and rational, the paper introduces a method which use AND/OR tree to match the facts and data with the strategy of depth-first and for- ward matching.