doi: 10.17586/2226-1494-2016-16-2-324-330


EVALUATION OF SEMANTIC SIMILARITY FOR SENTENCES IN NATURAL LANGUAGE BY MATHEMATICAL STATISTICS METHODS

A. E. Pismak, A. E. Kharitonova, E. A. Tsopa, S. V. Klimenkov


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For citation: Pismak A.E., Kharitonova A.E., Tsopa E.A., Klimenkov S.V. Evaluation of semantic similarity for sentences in natural language by mathematical statistics methods. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2016, vol. 16, no. 2, pp. 324–330. doi:10.17586/2226-1494-2016-16-2-324-330

Abstract

Subject of Research. The paper is focused on Wiktionary articles structural organization in the aspect of its usage as the base for semantic network.  Wiktionary community references, article templates and articles markup features are analyzed. The problem of numerical estimation for semantic similarity of structural elements in Wiktionary articles is considered. Analysis of existing software for semantic similarity estimation of such elements is carried out; algorithms of their functioning are studied; their advantages and disadvantages are shown. Methods. Mathematical statistics methods were used to analyze Wiktionary articles markup features. The method of semantic similarity computing based on statistics data for compared structural elements was proposed.Main Results. We have concluded that there is no possibility for direct use of Wiktionary articles as the source for semantic network. We have proposed to find hidden similarity between article elements, and for that purpose we have developed the algorithm for calculation of confidence coefficients proving that each pair of sentences is semantically near. The research of quantitative and qualitative characteristics for the developed algorithm has shown its major performance advantage over the other existing solutions in the presence of insignificantly higher error rate.  Practical Relevance. The resulting algorithm may be useful in developing tools for automatic Wiktionary articles parsing. The developed method could be used in computing of semantic similarity for short text fragments in natural language in case of algorithm performance requirements are higher than its accuracy specifications.


Keywords: semantic similarity, mathematical statistics, sets, tokens, Wiktionary, semantic analysis, text

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