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中文摘要：
传统的DEA模型（CCR、BCC）的径向效率度量是不完全的。它们只是分别地度量输入效率与输出效率,且效率度量没有考虑非零的输入松弛与输出松弛。修正的Russell方法消除了这些缺陷。基于修正的Russell方法,利用可信度方法,模糊DEA模型得以建立并求解。一个算例佐证了这一方法。
英文摘要：
The radial measures of classical DEA models（CCR,BCC） are incomplete, they are only separate measures of input and output efficiency and their efficiency index omit the non-zero input and output slacks.Enhanced Russell graph measure（ERM） eliminates these deficiencies.Based on ERM model,a fuzzy DEA model is proposed to deal with the efficiency evaluation problem with the given fuzzy input and output data,by using credibility measure,the efficiency of a DMU is obtained as representative of its possible range.A numerical example is used to illustrate the approach.
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