2Mitcheel J S.Machinery analysis and monitoring[M].Pennwell Publishing Company,1981.
3Frank P M.Analytical and qualitative mode based fault diagnosis:a survey and some new results[J].European J.Control,1989,5(2):6-28.
4Chen Y B,Li X,Orady E.Integrated diagnosis using informationgain-weighted radial basis function neural networks[J].Computers Industrial Engineering,1996,30(2):243-255.
5Gau W L,Buehrer D J.Vague sets[J].IEEE Trans on Systems.Man and Cybernetics,1993,23(2):610-614.
6Chen S M.Measures of similarity between vague sets[J].Fuzzy Sets and Systems,1995,74(2):217-223.
7Bustine H,Burillo P.Vague sets are intuitionistic fuzzy sets[J].Fuzzy Sets and Systems,1996,79(3):403-405.
8Hong D H,Kim C.A note on similarity measures between vague sets and between elements[J].Information Sciences,1999,115(1-4):83-96.