共 18 条
[3]
基于全域专利共被引的世界500强企业技术竞争的专利地图分析[J]. 王贤文,丁堃,张曦. 报学报. 2011 (07)
[4]
Patent citation analysis.A closer look at the basic input data from patent search reports[J] . Jacques Michel,Bernd Bettels.  Scientometrics . 2001 (1)
[6]
How to normalize cooccurrence data?an analysis of some well-known similarity measures. VAN ECK NEES J,LUDO W. Journal of the American Society for Information Science and Technology . 2009
[7]
Using patent citation to explore knowledge flow between different industries. LAI K K,CHANG S M,CHANG S B. Picemet2007Proceedings . 2007
[8]
Patent co-ciation analysis of Eli Lilly&Co.pa-tents. MOGEE M E. Research Technology Management . 1991
[9]
Patent citation indexing and notions of novelty,similarity and revelance. GARFIELD E. Journal of Chemical Documenta-tion . 1966