interclass

Note：Letter alike，interclass difference quiet；letter different，interclass difference patency.

注：字母相同，组间差异不显著；字母不同，组间差异显著。

The interclass difference matrix is calculated by using the fault class feature data from simulation in order to determinate the ambiguity sets.

法电路仿真特征数据计的类间差异矩阵，从而完成类模糊集的确定。