A Novel Case Retrieval Method Based on Weighted Gray Correlation Degree

In the similar case retrieval process, in order to consider the correlation between property cases, we introduced gray correlation theory to construct similar case retrieval based on weighted gray correlation model. Using AHP, entropy method and coefficient of variation combination portfolio weighting method, while avoiding the limitations of attribute weights to determine the main objective weighting method. Finally, through concrete examples we prove that this method can effectively improve case retrieval algorithm in term of the efficiency and quality of the search, but also has better resolution.