Number of NAWL words (n = 2902) representing distinct basic emotions as classified with different methods [7, 16].

For Euclidean distance (ED) based classification method following threshold values were used: 2.5 for happiness, 5.5 for anger, sadness, fear, disgust; 2.5 for the neutral class.

针对基于欧氏距离（Euclidean distance，ED）的分类方法，所采用的阈值设置如下：快乐类阈值为2.5，愤怒、悲伤、恐惧、厌恶四类阈值均为5.5；中性类阈值为2.5。