public static string Memebership2Grade(DenseVector memebershipVector)
{
int maxIndex=memebershipVector.MaximumIndex();
if(maxIndex>EvaluatedFiveGrades.Count-1||maxIndex<0)
{
throw (new Exception("隶属度向量数量大于评估指标分级数"));
}
return EvaluatedFiveGrades[maxIndex];
}