Research on Selection and Identification of Technical Elements for Patent Technological Evolution Analysis: A Case Study on Nano Fertilizer

doi:10.13266/j.issn.0252-3116.2020.06.008

Li Xiaoman, Zhang Xuefu, Song Hongyan, Sun Wei

Library and Information Service ›› 2020, Vol. 64 ›› Issue (6) : 59-68.

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Library and Information Service ›› 2020, Vol. 64 ›› Issue (6) : 59-68. DOI: 10.13266/j.issn.0252-3116.2020.06.008

Research on Selection and Identification of Technical Elements for Patent Technological Evolution Analysis: A Case Study on Nano Fertilizer

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{{article.zuoZheEn_L}}. {{article.title_en}}[J]. {{journal.qiKanMingCheng_EN}}, 2020, 64(6): 59-68 https://doi.org/10.13266/j.issn.0252-3116.2020.06.008

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Received	Revised	Published
2019-05-23	2019-09-22	2020-03-20
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2020-03-20

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