A reasoning model is described and a case matching algorithm is discussed.

According to the structure of multi-hierarchy case,the subspace of multi-hierarchy case was presented and a subspace method was proposed for multi-hierarchy case retrieval,and an algorithm of multi-hierarchy case matching was presented based on grey relational analysis.

Stamping parts case retrieval methodology based on process similarity;

Similarity analysis in nearest-neighbor case retrieval;

Rough set-based case retrieval technology in conceptual design of FMS;

This paper makes a brief introduction about the exact retrieval tool of CNKI Retrieval System,and shows it is helpful for literature characteristics recognition with practical retrieval examples for similar literature.