ABSTRACT
In the problem tree, when the each problem transformed into data, the data exist redundancy, with the data accumulation, the redundancy will augment, non-conductive to upper diagnosis[1]. Therefor, the research content of this paper as follows:
1 Creating pruned model high-eectively. This model has lesser time and space complexity. Because of the data are unlimited and the store of computer is limited, they are an unavoidable conflict, so how to take advantage of both is the research content of this paper.
