基于语料库的中国生态形象演变研究——信息贡献度与主题建模的语义分析

Corpus-Based Study on the Evolution of China’s Ecological Image:Semantic Analysis through Informativeness and Topic Modeling

本研究运用信息贡献度与主题建模的文本挖掘方法,对中国生态话语对外报道主题进行历时性研究,深入探索中国生态形象的发展历程。研究发现,与前一阶段(2001—2012年)相比,2012—2024年生态话语对外报道的总量显著增加,共现主题词呈现延续性与深化性特征。“生态环境保护”“城市与经济发展”“政府政策调控”是两个时期持续关注的重点,中国从生态基础建设转变为生态绿色体系战略,习近平生态文明思想的战略引领作用日益凸显。2012—2024年报道还聚焦两个特有主题,即“国际交流合作”和“生态旅游文化”,彰显了中国在全球生态文明建设中的责任担当,展示了独特的生态文化和崭新的乡村形象。研究揭示了中国生态形象动态化、多元化的发展轨迹,体现了“以人为本”的核心生态价值观。

This study examines the evolution of China’s ecological image through a diachronic analysis of the keywords in external publicity media using informativeness and topic modeling methods.The study reveals a significant increase in ecological discourse from 2012 to 2024,compared to the period from 2001 to 2012.The co-occurring keywords exhibit continuity and deepening,with“ecological environmental protection,”“urban and economic development”and“government policy regulation”remain focal points in both periods.There is a transition from ecological infrastructure construction to an ecological green system,with Xi Jinping’s thoughts on eco-civilization becoming increasingly prominent.Additionally,the 2012-2024 period also introduces the keywords of“international exchange and cooperation”and“ecological tourism culture,”highlighting China’s role in global ecological civilization and showcasing its distinctive ecological culture and rural image.The study elucidates the dynamic and diversified evolution of China’s ecological image,underscoring a human-centered ecological value system.