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JRM Vol.30 No.6 pp. 958-964
doi: 10.20965/jrm.2018.p0958
(2018)

Paper:

Improved Synthetic Weighted Algorithm of Ontology-Based Semantic Similarity Computation

Yuan Liu*, Haiquan Wang**, and Xiguang Zhang**

*School of Mechatronics Engineering, Zhengzhou University of Aeronautics
No.15 Wenyuan Road, Zhengzhou 450015, China

**Zhongyuan Petersburg Aviation College, Zhongyuan University of Technology
No.41 Zhongyuan Road, Zhengzhou 450007, China

Received:
May 8, 2018
Accepted:
October 17, 2018
Published:
December 20, 2018
Keywords:
semantic similarity, path coincidence degree, shortest distance, degree of concept, LCA density
Abstract
Improved Synthetic Weighted Algorithm of Ontology-Based Semantic Similarity Computation

Similarity tendency of different methods

To solve the problems of incomplete consideration and low precision in existing domain ontology semantic similarity computation, an improved synthetic weighted algorithm of ontology-based semantic similarity computation is proposed, mixing path coincidence degree, the shortest distance, and concept property methods. First, the depths of lowest common ancestor (LCA) and an ontology tree are added to the formula of path coincidence degree for distinguishing the influence of LCA depth on similarity when multiple inheritances occur. Second, the analysis of similarity algorithm based on the shortest distance cannot distinguish two situations with the same path distance. One is when the density of LCA is different. The other is a depth difference in the concept pair. So, the number of direct subnodes of the LCA and the depth difference are added to the formula of the shortest distance. Meanwhile, the switch of density factor is set to ensure similarity calculation results between [0,1]. Then, a synthetic weighted algorithm of semantic similarity computation is constructed using the weighting path coincidence degree, the shortest distance, and the concept property. Finally, this algorithm and the other three algorithms in the literature are used to calculate semantic similarity in tea ontology. The results show that this algorithm is closest to expert experience.

Cite this article as:
Y. Liu, H. Wang, and X. Zhang, “Improved Synthetic Weighted Algorithm of Ontology-Based Semantic Similarity Computation,” J. Robot. Mechatron., Vol.30, No.6, pp. 958-964, 2018.
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Last updated on Jul. 19, 2019