情报学报  2024, Vol. 43 Issue (5): 616-632    DOI: 10.3772/j.issn.1000-0135.2024.05.010
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Thematic Analysis and Development Trend Research of Science and Technology in the United States Policy in the 21st Century
Cao Lingjing1,2, Zhang Zhiqiang3,4
1.School of Information Management, Zhengzhou University, Zhengzhou 450001
2.Research Center for “Double World-Class Project” of Henan Province, Zhengzhou 450001
3.National Science Library (Chengdu), Chinese Academy of Sciences, Chengdu 610299
4.Department of Information Resource Management, School of Economics and Management, University of Chinese Academy of Sciences, Beijing 100190