Non-Classification Case Retrieval Based on Rank Correlation

In order to overcome the limitation of the existing alignment measures which need to set threshold for non-classification case-based reasoning systems,rank correlation is introduced to determine whether a case met CBR(case-based reasoning) hypothesis,in terms of which a few evaluation indicators for non-classification case-based reasoning systems are presented.The experiment is performed by testing 55 air investigation reports from Canadian Transportation Safety Board. The result shows that the rank correlation alignment method an acquire higher accuracy(10.91%and 16.37%,than case alignment and weighted correlation method respectively) in non-classification case retrieval.