基于DTM模型和文本特征分析的基金项目新兴趋势探测研究<sup>* </sup>——以NSF石墨烯领域为例

基于DTM模型和文本特征分析的基金项目新兴趋势探测研究^*——以NSF石墨烯领域为例

徐路路, 王效岳, 白如江, 周彦廷

Detecting Emerging Trends of Funds Based on DTM Model and Text Analytics: Case Study of NSF Graphene Field

Xu Lulu,Wang Xiaoyue,Bai Rujiang,Zhou Yanting

表6 DV_t计算结果

主题	2008	2009	2010	2011	2012	2013	2014	2015	2016
Topic0		0.536806	0.385843	0.701674	0.660604	1.065147	1.033578	1.946747	1.308421
Topic1	0.679784	0.818186	0.658238	1.208104	1.047232	1.070715	1.442418	1.041759	1.504981
Topic2	1.121281	0.818186	0.801484	0.699304	0.811001	1.070715	0.96507	1.182918	0.58696
Topic3				0.916347	0.979223	1.070715	1.033578	1.845305	1.218901
Topic4			0.658238	0.787752	0.84818	0.903286	0.979223	0.94795	0.819842
Topic5	0.679784	2.794199	1.407899	0.913776	0.653303	0.84818	1.442418	0.970248	0.952771
Topic6	1.373507	2.794199	1.201312	1.308421	0.750168	0.84818	0.710484	0.755196	0.674185
Topic7				0.916347	0.653303	0.703973	1.033578	1.493767	1.208104
Topic8	1.373507	2.794199	1.201312	1.308421	1.845305	2.767026	1.507944	1.041759	2.190124
Topic9	1.121281	1.116123	1.201312	1.208104	1.918824	0.84818	0.710484	0.755196	0.548143