国内知识产权信息服务研究主题演化分析

为梳理国内知识产权信息服务的研究主题及变化情况，以CNKI数据库收录的2006—2020年与知识产权信息服务相关的中文论文为研究对象，使用隐含狄利克雷分布（LDA）模型提取研究主题，根据文档-主题概率分布和主题-词项概率分布结果进行主题演化分析。结果表明，2006—2020年知识产权信息服务的服务内容、服务范围和服务模式都出现一定程度的继承和演化，而有关档案管理方面的知识产权信息服务没有得到持续的关注与研究。

Evolution Analysis of Domestic Intellectual Property Information Service Research Topics

In order to sort out the research topics and evolution of intellectual property information services in China, taking the Chinese papers related to intellectual property information services from 2006 to 2020 included in CNKI database as the research object, the Latent Dirichlet Allocation (LDA) model is used to conduct the topic evolution analysis based on the document-topic probability distribution and subject-item probability distribution results.The results show that the service content, service scope and service mode of intellectual property information service from 2006 to 2020 have been inherited and evolved into to a certain degree,while the intellectual property information service related to archives management has not received continuous attention and research.