After that,the current situation of research in policy based management is overviewed,including policy definition,the architecture of policy-based management ,policy language,the conflict detection of policy,policy implementation model,and the recent process.

Analysis,detection and solution of policy conflict;

Network element based method for policy conflict resolution;

Policy conflict might raise because the way of IPsec policy configure of existing IPsec system.

In this paper,we set up a three-dimensional model of international conflict strategy by adding an environmental variable to overcome the limitations of traditional two-dimensional conflict strategy model.

Workflow conflict detection algorithm based on description logic;

Application of fuzzy constraint network in conflict detection of machine tool s collaborative design;

Research on technologies of constraint-based conflict detection in collaborative design;

To improve the efficiency and scalability of conflict detection for multi-dimensional classifiers,a new algorithm,based on grid of trie(GoT) algorithm,was proposed.