Eigenfunction is used to describe ambiguity sets for analog circuit diagnosis. Fault isolation and conditional fault isolation are proposed to identify isolation ability of test node.

采用故障特征函数描述模拟电路故障字典法中的模糊集，提出了节点故障隔离度和条件故障隔离度的概念，用其描述节点对故障的区分能力。

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Even aid truly intended for development has often been--through the fault of the donors--too uncoordinated, too conditional and too thinly dispersed to have had any real impact on poverty.

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