(3 ) features of turbopump test data both in time domain and in frequency domain are analyzed using statistical estimation methods . the value of applying these features into nd is discussed (3)应用统计特征估计方法,分别对涡轮泵试车数据的时域特征和频域特征进行了统计分析,并讨论了这些特征在新异类检测中的应用价值。