
中美科技文献时滞差异及主题演化对比分析研究——以农业领域为例
杨金庆, 吴乐艳
中美科技文献时滞差异及主题演化对比分析研究——以农业领域为例
A Comparative Analysis of the TimeLag Differences and Topic Evolution of Scientific Literature between China and America:A Case Study in the Agricultural Fields
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