A lot of papers have been published for designing appropriate similarity measurements.
given the word w i , w j , we use the notation P (w i ) to denote the occurrence counts of word w i in the corpus C. P (w i , w j ) denotes the co-occurrence counts of word w i and w j in C. In this paper we employ the corpus-based version of the three well-known similarity measurements: Jaccard, Dice and PMI.