请就《中美社论中在重大事件与热点问题上关键词的变化：一个时间序列分析研究2008-2021》这一标题生成论文

《中美社论中在重大事件与热点问题上关键词的变化：一个时间序列分析研究（2008-2021）》论文

摘要：本文通过对中美社论中的关键词进行时间序列分析，研究了2008年至2021年期间中美关系中重大事件和热点问题的演变趋势。本研究发现，随着时间的推移，中美社论中关注的重点从经贸合作逐渐转向了安全政治领域，尤其是南海争端、朝鲜核问题、台湾问题等。同时，在热点问题上，南海争端、贸易战、人权问题等成为了中美社论中关注度最高的话题。此外，本研究还发现，中美关系的发展变化也会对社论中的关键词产生影响，比如在2020年新冠疫情期间，疫情成为了中美社论中的重要话题。

关键词：中美关系；社论；重大事件；热点问题；时间序列分析

Abstract: This paper studies the evolution trend of major events and hot issues in Sino-US relations from 2008 to 2021 by conducting time series analysis on the keywords in Sino-US editorials. This study found that as time goes by, the focus of Sino-US editorials has gradually shifted from economic and trade cooperation to the security and political field, especially the South China Sea dispute, North Korea nuclear issue, and Taiwan issue. At the same time, in terms of hot issues, the South China Sea dispute, trade war, human rights issues have become the most concerned topics in Sino-US editorials. In addition, this study also found that the development changes of Sino-US relations will also have an impact on the keywords in editorials. For example, during the COVID-19 pandemic in 2020, the epidemic became an important topic in Sino-US editorials.

Keywords: Sino-US relations; editorials; major events; hot issues; time series analysis