The Researching on Similarity Calculation Based on HNC

In the classification of text and retrieval of information, because the redundancy of information and complex computing problems are aroused from synonymous phenomenon between sentences, this paper give a calculation model about semantic similarity of sentences: start with the semantic similarity of words and phrases, then analyze sentence category, and introduce semantic similarity to syntaxes, finally calculate semantic similarity of a sentence. Through the analysis of examples, we can see that the grammar and semantics of sentence are inseparable, it is necessary to consider both.