基于LDA模型和分类号的专利技术演化研究
Publisher: 国家哲学社会科学学术期刊数据库
E-ISSN: 1008-0821|37|5|13-18
ISSN: 1008-0821
Source: 现代情报, Vol.37, Iss.5, 2017-01, pp. : 13-18
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Abstract