With the extreme drought(flood)event in southern China from July to August in 2022(1999)as the research object,based on the comprehensive diagnosis and composite analysis on the anomalous drought and flood years from ...With the extreme drought(flood)event in southern China from July to August in 2022(1999)as the research object,based on the comprehensive diagnosis and composite analysis on the anomalous drought and flood years from July to August in 1961-2022,it is found that there are significant differences in the characteristics of the vertically integrated moisture flux(VIMF)anomaly circulation pattern and the VIMF convergence(VIMFC)anomaly in southern China in drought and flood years,and the VIMFC,a physical quantity,can be regarded as an indicative physical factor for the"strong signal"of drought and flood in southern China.Specifically,in drought years,the VIMF anomaly in southern China is an anticyclonic circulation pattern and the divergence characteristics of the VIMFC are prominent,while those are opposite in flood years.Based on the SST anomaly in the typical draught year of 2022 in southern China and the SST deviation distribution characteristics of abnormal draught and flood years from 1961 to 2022,five SST high impact areas(i.e.,the North Pacific Ocean,Northwest Pacific Ocean,Southwest Pacific Ocean,Indian Ocean,and East Pacific Ocean)are selected via the correlation analysis of VIMFC and the global SST in the preceding months(May and June)and in the study period(July and August)in 1961-2022,and their contributions to drought and flood in southern China are quantified.Our study reveals not only the persistent anomalous variation of SST in the Pacific and the Indian Ocean but also its impact on the pattern of moisture transport.Furthermore,it can be discovered from the positive and negative phase fitting of SST that the SST composite flow field in high impact areas can exhibit two types of anomalous moisture transport structures that are opposite to each other,namely an anticyclonic(cyclonic)circulation pattern anomaly in southern China and the coastal areas of east China.These two types of opposite anomalous moisture transport structures can not only drive the formation of drought(flood)in southern China but also exert its influence on the persistent development of the extreme weather.展开更多
背景近年来有关将人工智能(AI)应用于胃癌诊治的研究日益增多,但目前尚未有研究者使用文献计量学分析法对其进行系统的分析。目的对将AI应用于胃癌诊治的相关研究进行分析,探讨2003-2022年研究的热点及发展趋势。方法于2022-11-06,计算...背景近年来有关将人工智能(AI)应用于胃癌诊治的研究日益增多,但目前尚未有研究者使用文献计量学分析法对其进行系统的分析。目的对将AI应用于胃癌诊治的相关研究进行分析,探讨2003-2022年研究的热点及发展趋势。方法于2022-11-06,计算机检索Web of Science(WOS)核心合集数据库,获取将AI应用于胃癌诊治的相关研究。通过文献计量学分析法,采用VOSviewer 1.6.18软件对国家(地区)间、机构间、作者间的合作情况、共被引作者情况、关键词共现与叠加情况进行可视化分析,采用CiteSpace 5.7.R5软件进行机构中介中心性分析、期刊双图叠加分析、近6年共被引文献聚类分析、共被引文献聚类时间线图分析及参考文献突现分析。采用Excel 2019软件绘制发文量条形图,以及国家(地区)、机构、期刊、作者、共被引作者、引用参考文献和关键词的描述性分析表格。结果共纳入703篇文献,2003-2022年将AI应用于胃癌诊治的相关研究年发文量整体呈上升趋势,2017年后年发文量快速增长,其中2019-2021年增长最为迅速。发文量最多的国家(地区)、机构和作者分别为中国、中国科学院和TADA TOMOHIRO。共被引次数排在前3的作者BRAY FREDDIE、HIRASAWA TOSHIAKI和JIANG YUMING对该领域做出了重要贡献。Frontiers in Oncology是发文量最多的期刊,Gastrointestinal Endoscopy是刊载将AI应用于胃癌诊治相关研究、发文量排在前10的期刊中最具影响力的期刊。施引期刊的所属领域主要集中在“Medicine,Medical,Clinical”(“药物,医学,临床”)、“Molecular,Biology,Immunology”(“分子,生物学,免疫学”)2个领域;被引期刊的所属领域主要集中在“Molecular,Biology,Genetics”(“分子,生物学,遗传学”)、“Health,Nursing,Medicine”(“健康,护理,药物”)2个领域。共被引次数排在首位的参考文献为Global cancer statistics 2018:GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries。根据关键词聚类结果可将所有关键词分为4类:AI辅助胃癌的生物学研究、AI辅助胃癌的内镜诊断、AI辅助胃癌的病理诊断和AI辅助胃癌的非内镜治疗及预后预测。深度学习、卷积神经网络、影像组学、消化道内镜、病理学和免疫治疗是目前的研究热点。结论AI在胃癌诊治中具有广阔的应用前景,越来越多的学者致力于开展胃癌诊治的AI研究。目前,AI在胃癌的生物学、诊断、分期、疗效评估和预后预测方面得到了广泛的研究。本研究结果可为从事AI与胃癌相关研究工作的学者提供参考。展开更多
基金The Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(2019QZKK0105)the Science and Technology Development Fund of the Chinese Academy of Meteorological Sciences(2022KJ022)+2 种基金Special Fund for the Basic Scientific Research Expenses of the Chinese Academy of Meteorological Sciences(2021Z013)the Science and Technology Development Fund of the Chinese Academy of Meteorological Sciences(2022KJ021)Major Projects of the Natural Science Foundation of China(91337000)。
文摘With the extreme drought(flood)event in southern China from July to August in 2022(1999)as the research object,based on the comprehensive diagnosis and composite analysis on the anomalous drought and flood years from July to August in 1961-2022,it is found that there are significant differences in the characteristics of the vertically integrated moisture flux(VIMF)anomaly circulation pattern and the VIMF convergence(VIMFC)anomaly in southern China in drought and flood years,and the VIMFC,a physical quantity,can be regarded as an indicative physical factor for the"strong signal"of drought and flood in southern China.Specifically,in drought years,the VIMF anomaly in southern China is an anticyclonic circulation pattern and the divergence characteristics of the VIMFC are prominent,while those are opposite in flood years.Based on the SST anomaly in the typical draught year of 2022 in southern China and the SST deviation distribution characteristics of abnormal draught and flood years from 1961 to 2022,five SST high impact areas(i.e.,the North Pacific Ocean,Northwest Pacific Ocean,Southwest Pacific Ocean,Indian Ocean,and East Pacific Ocean)are selected via the correlation analysis of VIMFC and the global SST in the preceding months(May and June)and in the study period(July and August)in 1961-2022,and their contributions to drought and flood in southern China are quantified.Our study reveals not only the persistent anomalous variation of SST in the Pacific and the Indian Ocean but also its impact on the pattern of moisture transport.Furthermore,it can be discovered from the positive and negative phase fitting of SST that the SST composite flow field in high impact areas can exhibit two types of anomalous moisture transport structures that are opposite to each other,namely an anticyclonic(cyclonic)circulation pattern anomaly in southern China and the coastal areas of east China.These two types of opposite anomalous moisture transport structures can not only drive the formation of drought(flood)in southern China but also exert its influence on the persistent development of the extreme weather.
文摘背景近年来有关将人工智能(AI)应用于胃癌诊治的研究日益增多,但目前尚未有研究者使用文献计量学分析法对其进行系统的分析。目的对将AI应用于胃癌诊治的相关研究进行分析,探讨2003-2022年研究的热点及发展趋势。方法于2022-11-06,计算机检索Web of Science(WOS)核心合集数据库,获取将AI应用于胃癌诊治的相关研究。通过文献计量学分析法,采用VOSviewer 1.6.18软件对国家(地区)间、机构间、作者间的合作情况、共被引作者情况、关键词共现与叠加情况进行可视化分析,采用CiteSpace 5.7.R5软件进行机构中介中心性分析、期刊双图叠加分析、近6年共被引文献聚类分析、共被引文献聚类时间线图分析及参考文献突现分析。采用Excel 2019软件绘制发文量条形图,以及国家(地区)、机构、期刊、作者、共被引作者、引用参考文献和关键词的描述性分析表格。结果共纳入703篇文献,2003-2022年将AI应用于胃癌诊治的相关研究年发文量整体呈上升趋势,2017年后年发文量快速增长,其中2019-2021年增长最为迅速。发文量最多的国家(地区)、机构和作者分别为中国、中国科学院和TADA TOMOHIRO。共被引次数排在前3的作者BRAY FREDDIE、HIRASAWA TOSHIAKI和JIANG YUMING对该领域做出了重要贡献。Frontiers in Oncology是发文量最多的期刊,Gastrointestinal Endoscopy是刊载将AI应用于胃癌诊治相关研究、发文量排在前10的期刊中最具影响力的期刊。施引期刊的所属领域主要集中在“Medicine,Medical,Clinical”(“药物,医学,临床”)、“Molecular,Biology,Immunology”(“分子,生物学,免疫学”)2个领域;被引期刊的所属领域主要集中在“Molecular,Biology,Genetics”(“分子,生物学,遗传学”)、“Health,Nursing,Medicine”(“健康,护理,药物”)2个领域。共被引次数排在首位的参考文献为Global cancer statistics 2018:GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries。根据关键词聚类结果可将所有关键词分为4类:AI辅助胃癌的生物学研究、AI辅助胃癌的内镜诊断、AI辅助胃癌的病理诊断和AI辅助胃癌的非内镜治疗及预后预测。深度学习、卷积神经网络、影像组学、消化道内镜、病理学和免疫治疗是目前的研究热点。结论AI在胃癌诊治中具有广阔的应用前景,越来越多的学者致力于开展胃癌诊治的AI研究。目前,AI在胃癌的生物学、诊断、分期、疗效评估和预后预测方面得到了广泛的研究。本研究结果可为从事AI与胃癌相关研究工作的学者提供参考。
