The double negation structure is a special structure of"expressing positive meaning through two nega-tions",in which the two negations have an important impact on the semantic analysis and emotional classification in natural language processing.Taking"--P==＞P"as the prototype,this paper examines the"negation word+negation word"structures in modern Chinese,and divides them into 3 categories,25 sub-categories and 132 con-structions in total.Then this paper proposes three conditions for the establishment of the double negation structure,and a rule-based method to identify the double negation.The accuracy rate of recognition of the double negation structure is 98.80％,the recall rate is 98.90％,and the F1 value is 98.95％.The proposed method could identify 8 640 sentences with 99.20％true double negation structure from 96 281 sentences.
维普
万方数据