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New multi-stage similarity measure for calculation of pairwise patent similarity in a patent citation network

Title
New multi-stage similarity measure for calculation of pairwise patent similarity in a patent citation network
Author
김병훈
Keywords
Patent citation network; Adjacency matrix; Similarity measure; US class code; Jaccard similarity index; Co-citation; Indirect citation
Issue Date
2015-05
Publisher
SPRINGER
Citation
SCIENTOMETRICS, v. 103, No. 2, Page. 565-581
Abstract
Being able to effectively measure similarity between patents in a complex patent citation network is a crucial task in understanding patent relatedness. In the past, techniques such as text mining and keyword analysis have been applied for patent similarity calculation. The drawback of these approaches is that they depend on word choice and writing style of authors. Most existing graph-based approaches use common neighbor-based measures, which only consider direct adjacency. In this work we propose new similarity measures for patents in a patent citation network using only the patent citation network structure. The proposed similarity measures leverage direct and indirect co-citation links between patents. A challenge is when some patents receive a large number of citations, thus are considered more similar to many other patents in the patent citation network. To overcome this challenge, we propose a normalization technique to account for the case where some pairs are ranked very similar to each other because they both are cited by many other patents. We validate our proposed similarity measures using US class codes for US patents and the well-known Jaccard similarity index. Experiments show that the proposed methods perform well when compared to the Jaccard similarity index.
URI
https://link.springer.com/article/10.1007/s11192-015-1531-8http://repository.hanyang.ac.kr/handle/20.500.11754/105988
ISSN
0138-9130; 1588-2861
DOI
10.1007/s11192-015-1531-8
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > INDUSTRIAL AND MANAGEMENT ENGINEERING(산업경영공학과) > Articles
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