专利文献技术要素识别方法研究——以纳米肥料领域为例
李晓曼, 张学福, 宋红燕, 孙巍
Research on Selection and Identification of Technical Elements for Patent Technological Evolution Analysis: A Case Study on Nano Fertilizer
Li Xiaoman, Zhang Xuefu, Song Hongyan, Sun Wei
图书情报工作
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2020, (6): 59
-68
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DOI: 10.13266/j.issn.0252-3116.2020.06.008
