6Liu B,Liu Y K.Expected Value of Fuzzy Variable and Fuzzy Expected Value Models [J].IEEE Transactions on Fuzzy Systems, 2002,10(4).
7Liu B D. Theory and Practice of Uncertain Programming[M]. Heidelberg: Physica -Verlag,2002.
8Cheng C H,Yang K L,Hwang C L.Evaluating Attack Helicopters by AHP Based on lnguistic Variable Weight [J].European Journal of Operational Research, 1999,116(2).
4Ramaswamy S.Portfolio selection using fuzzy decision theory[R].Working Paper of Bank for International Settlements,No.59,1998.
5Watada J.Fuzzy portfolio model for decision making in investment[A].Yoshida Y.Dynamical aspects in fuzzy decision making[C].Heidelberg:Physica-Verlag,2001:141-162.
6Abdel-Kader M G,Dugdale D.Evaluating investments in advanced manufacturing technology:a fuzzy set theory approach[J].British Accounting Review,2001,33(4):455-489.
7Liu B.Theory and practice of uncertain programming[M].Heidelberg:Physica-Verlag,2002.
8Nahmias S.Fuzzy variables[J].Fuzzy Sets and Systems,1978,1(2):97-110.
