NCEP/NCAR data are utilized to analyze an extreme flood year(1998) and an extreme dry year(2006) in the Sichuan-Chongqing region(SCR) and the results are as follows. The positive divergence of South Asia High(SAH) is ...NCEP/NCAR data are utilized to analyze an extreme flood year(1998) and an extreme dry year(2006) in the Sichuan-Chongqing region(SCR) and the results are as follows. The positive divergence of South Asia High(SAH) is stronger in the flood year; the position of the ridge line of SAH is southward compared with the annual average; Western Pacific Subtropical High(WPSH) extends westward and its ridge line is southward. In the drought year, the positive divergence of SAH is weaker, its ridge line is northward, and the position of WPSH is also northward. As shown in the dynamics, in drought(flood) years, negative(positive) vorticity advection in the upper atmosphere can cause the atmosphere to ascend(descend), and anomalous circulation of SAH displays divergence(convergence), and anomalous circulation of the lower atmosphere shows convergence(divergence). Thermal structure of the atmosphere shows that there is warm(cold) temperature advection in the lower atmosphere, and the vertical distribution of diabetic heating causes SAH's local circulation to display convergence(divergence) and affects vertical motion of the lower atmosphere circulation eventually. To some extent, the two extreme years in the SCR is closely related to the vertical motion of atmosphere circulation and the variation of such vertical motion is caused by differences of interactions between SAH and lower atmosphere circulations.展开更多
AIM:To analyze the changes in scientific output relating to Leber congenital amaurosis(LCA)and forecast the study trends in this field.METHODS:All of the publications in the field of LCA from 2002 to 2022 were collect...AIM:To analyze the changes in scientific output relating to Leber congenital amaurosis(LCA)and forecast the study trends in this field.METHODS:All of the publications in the field of LCA from 2002 to 2022 were collected from Web of Science(WOS)database.We analyzed the quantity(number of publications),quality(citation and H-index)and development trends(relative research interest,RRI)of published LCA research over the last two decades.Moreover,VOSviewer software was applied to define the co-occurrence network of keywords in this field.RESULTS:A total of 2158 publications were ultimately examined.We found that the focus on LCA kept rising and peaked in 2015 and 2018,which is consistent with the development trend of gene therapy.The USA has contributed most to this field with 1162 publications,56674 citations and the highest H-index value(116).The keywords analysis was divided into five clusters to show the hotspots in the field of LCA,namely mechanism-related,genotype-related,local phenotype-related,system phenotype-related,and therapy-related.We also identified gene therapy and antiretinal degeneration therapy as a major focus in recent years.CONCLUSION:Our study illustrates historical research process and future development trends in LCA field.This may help to guide the orientation for further clinical diagnosis,treatment and scientific research.展开更多
目的探讨国内外专科护士处方权护理研究热点和前沿进展。方法通过中国知网和Web of Science核心合集检索专科护士处方权研究的相关文献,为建库至2023年10月31日,并运用Cite Space软件进行分析,包括关键词共现、聚类和突现分析。结果共...目的探讨国内外专科护士处方权护理研究热点和前沿进展。方法通过中国知网和Web of Science核心合集检索专科护士处方权研究的相关文献,为建库至2023年10月31日,并运用Cite Space软件进行分析,包括关键词共现、聚类和突现分析。结果共纳入中文文献138篇、英文文献6493篇。该领域中英文发文量总体呈持续上升趋势,且近5年研究成果产出呈爆发式增长,研究热点包括药物处方、处方形式、专科护士、社区护理、癌痛管理。结论伴随着国内护士处方权的不断完善和成熟,未来相关研究可进一步探究不同专科护士领域的处方权资质,迎合本土化开业护士培养需求,构建完善的专科护士处方权护理理论和实践体系。同时,护士处方权主题呈多样化发展,未来可借鉴国外高质量研究,在药物处方及执业领域方面丰富研究类型,开展更高与更深层次的研究,推动我国护士处方权事业的发展。展开更多
为探究淡水中微塑料的研究现状、热点和趋势,以Web of Science(WOS)核心数据库为数据源,采用Citespace、VOSviewer和Bibliometrix等文献计量软件及Scimago graphica可视化工具,对2007年至2022年期间发表的淡水中微塑料相关文献进行可视...为探究淡水中微塑料的研究现状、热点和趋势,以Web of Science(WOS)核心数据库为数据源,采用Citespace、VOSviewer和Bibliometrix等文献计量软件及Scimago graphica可视化工具,对2007年至2022年期间发表的淡水中微塑料相关文献进行可视化分析。结果表明,自2014年起淡水中微塑料相关研究的发文量呈指数增长。中国在该领域具有较强的学术影响力,发文量、论文引用数、H指数等位居首位。发文量最高的作者来自于华东师范大学、中国科学院、中国科学院大学,华东师范大学是该领域主要的研究机构。高产期刊为Science of the Total Environment。热点高频关键词包括微塑料、污染、淡水、沉积物和污水处理厂等。关键词聚类表明,淡水中微塑料研究的热点主题包括“微塑料的吸附、来源和降解”“微塑料鉴定”“微塑料在淡水环境中的污染”“微塑料在生物体内的累积”和“微塑料的毒性作用”5个方面。关键词突现分析显示,偏远地区和特殊地理条件中微塑料污染及纺织品洗涤释放的纤维微塑料问题被视为该领域研究的新趋势。未来研究应关注偏远地区和特殊地理等更大范围内微塑料污染及减少来源于纺织品洗涤产生的微塑料。展开更多
为探究植物数据库的研究现状、热点和趋势,以Web of Science(WOS)核心数据集SCI-EXPANDED为数据源,运用Citespace、VOSviewer和Scimago Graphica文献计量软件和Origin数据分析工具,从发文量、作者、国家、机构和关键词等方面,对2004年至...为探究植物数据库的研究现状、热点和趋势,以Web of Science(WOS)核心数据集SCI-EXPANDED为数据源,运用Citespace、VOSviewer和Scimago Graphica文献计量软件和Origin数据分析工具,从发文量、作者、国家、机构和关键词等方面,对2004年至2022年间发表的植物数据库相关文献进行可视化分析。结果表明,该领域发文量在逐步上升,发文量最高的作者是来自中国农业大学的Su Zhen,中国、美国和德国是该领域研究的主要国家,中国科学院、法国国家科学研究中心是该领域的主要研究机构。该领域的高产期刊为Nucleic Acids Research(核酸研究),发文量占比17.09%。热点高频关键词为database、identification、evolution、resource等。根据关键词聚类主题的不同,对植物数据库进行划分:生态数据库、药用植物数据、组学数据库和遗传资源数据库。关键词突现分析结果显示,prediction、expression和diversity等是近三年出现的突现关键词,可被看作植物数据库研究领域的研究新趋势。展开更多
基金National Key Basic Research Development Program Project of China(2012CB417202)Key Project of National Natural Science Foundation(91337215)National Natural Science Foundation of China(41275051)
文摘NCEP/NCAR data are utilized to analyze an extreme flood year(1998) and an extreme dry year(2006) in the Sichuan-Chongqing region(SCR) and the results are as follows. The positive divergence of South Asia High(SAH) is stronger in the flood year; the position of the ridge line of SAH is southward compared with the annual average; Western Pacific Subtropical High(WPSH) extends westward and its ridge line is southward. In the drought year, the positive divergence of SAH is weaker, its ridge line is northward, and the position of WPSH is also northward. As shown in the dynamics, in drought(flood) years, negative(positive) vorticity advection in the upper atmosphere can cause the atmosphere to ascend(descend), and anomalous circulation of SAH displays divergence(convergence), and anomalous circulation of the lower atmosphere shows convergence(divergence). Thermal structure of the atmosphere shows that there is warm(cold) temperature advection in the lower atmosphere, and the vertical distribution of diabetic heating causes SAH's local circulation to display convergence(divergence) and affects vertical motion of the lower atmosphere circulation eventually. To some extent, the two extreme years in the SCR is closely related to the vertical motion of atmosphere circulation and the variation of such vertical motion is caused by differences of interactions between SAH and lower atmosphere circulations.
基金Supported by the National Natural Science Foundation of China (No.82171076,No.82101159)Science and Technology Commission of Shanghai Municipality (No.20Z11900400)+2 种基金Shanghai Hospital Development Center (No.SHDC2020CR2040B,No.SHDC2020CR5014)Shanghai Collaborative Innovation Center for Translational Medicine (No.TM202115PT)Shanghai Sailing Program (No.22YF1435500).
文摘AIM:To analyze the changes in scientific output relating to Leber congenital amaurosis(LCA)and forecast the study trends in this field.METHODS:All of the publications in the field of LCA from 2002 to 2022 were collected from Web of Science(WOS)database.We analyzed the quantity(number of publications),quality(citation and H-index)and development trends(relative research interest,RRI)of published LCA research over the last two decades.Moreover,VOSviewer software was applied to define the co-occurrence network of keywords in this field.RESULTS:A total of 2158 publications were ultimately examined.We found that the focus on LCA kept rising and peaked in 2015 and 2018,which is consistent with the development trend of gene therapy.The USA has contributed most to this field with 1162 publications,56674 citations and the highest H-index value(116).The keywords analysis was divided into five clusters to show the hotspots in the field of LCA,namely mechanism-related,genotype-related,local phenotype-related,system phenotype-related,and therapy-related.We also identified gene therapy and antiretinal degeneration therapy as a major focus in recent years.CONCLUSION:Our study illustrates historical research process and future development trends in LCA field.This may help to guide the orientation for further clinical diagnosis,treatment and scientific research.
文摘目的探讨国内外专科护士处方权护理研究热点和前沿进展。方法通过中国知网和Web of Science核心合集检索专科护士处方权研究的相关文献,为建库至2023年10月31日,并运用Cite Space软件进行分析,包括关键词共现、聚类和突现分析。结果共纳入中文文献138篇、英文文献6493篇。该领域中英文发文量总体呈持续上升趋势,且近5年研究成果产出呈爆发式增长,研究热点包括药物处方、处方形式、专科护士、社区护理、癌痛管理。结论伴随着国内护士处方权的不断完善和成熟,未来相关研究可进一步探究不同专科护士领域的处方权资质,迎合本土化开业护士培养需求,构建完善的专科护士处方权护理理论和实践体系。同时,护士处方权主题呈多样化发展,未来可借鉴国外高质量研究,在药物处方及执业领域方面丰富研究类型,开展更高与更深层次的研究,推动我国护士处方权事业的发展。
文摘为探究淡水中微塑料的研究现状、热点和趋势,以Web of Science(WOS)核心数据库为数据源,采用Citespace、VOSviewer和Bibliometrix等文献计量软件及Scimago graphica可视化工具,对2007年至2022年期间发表的淡水中微塑料相关文献进行可视化分析。结果表明,自2014年起淡水中微塑料相关研究的发文量呈指数增长。中国在该领域具有较强的学术影响力,发文量、论文引用数、H指数等位居首位。发文量最高的作者来自于华东师范大学、中国科学院、中国科学院大学,华东师范大学是该领域主要的研究机构。高产期刊为Science of the Total Environment。热点高频关键词包括微塑料、污染、淡水、沉积物和污水处理厂等。关键词聚类表明,淡水中微塑料研究的热点主题包括“微塑料的吸附、来源和降解”“微塑料鉴定”“微塑料在淡水环境中的污染”“微塑料在生物体内的累积”和“微塑料的毒性作用”5个方面。关键词突现分析显示,偏远地区和特殊地理条件中微塑料污染及纺织品洗涤释放的纤维微塑料问题被视为该领域研究的新趋势。未来研究应关注偏远地区和特殊地理等更大范围内微塑料污染及减少来源于纺织品洗涤产生的微塑料。
