只有输出(入)的数据包络分析及其应用

DATAENVELOPMENTANALYSISWITHOUTPUT（OR INPUT）ONLY AND ITS APPLICATION

在根据一些性能指标评价若干个决策单元时，会遇到所有指标都是越大（或越小）越好，即决策单元只有输出（或输入）指标的情况。本文先讨论这种情况下的ＤＥＡ理论，再根据某水泥厂水泥的２８天抗折强度和耐压强度数据对（对提高水泥质量来说，这两种强度都是越大越好），找出了这些数据对所成集合中的有效点及其对应的熟料成分。

When some decision－making units（DMUs）are evaluated by some criteria，it＇s possible to be encounted that the larger（or the smaller）the value of each criterion is，the better，which means that DMUs ouly have output（or input）criteria，In this paper，I would like to discuss the theory of DEA in this case．And according to the data－pairs of cement＇s 28－day bending strength and pressure－resistant strength in a certain cement factory（for improving the quality of cement，both strengthes are the larger the better），this paper finds out the effective points of the set ofabove data－pairs with relevant grog compositions．