The state-selective cross section data are useful for understanding and modeling the x-ray emission in celestial observations.In the present work,using the cold target recoil ion momentum spectroscopy,for the first ti...The state-selective cross section data are useful for understanding and modeling the x-ray emission in celestial observations.In the present work,using the cold target recoil ion momentum spectroscopy,for the first time we investigated the state-selective single electron capture processes for S^(q+)–He and H_(2)(q=11–15)collision systems at an impact energy of q×20 keV and obtained the relative state-selective cross sections.The results indicate that only a few principal quantum states of the projectile energy level are populated in a single electron capture process.In particular,the increase of the projectile charge state leads to the population of the states with higher principal quantum numbers.It is also shown that the experimental averaged n-shell populations are reproduced well by the over-barrier model.The database is openly available in Science Data Bank at 10.57760/sciencedb.j00113.00091.展开更多
目的分析全球三阴性乳腺癌脑转移文献的分布规律和研究前沿,对三阴性乳腺癌脑转移的研究进行整体文献计量评价,为此后的相关研究提供方向。方法研究数据均来自WOS核心数据库,使用CiteSpace文献计量软件,对三阴性乳腺癌脑转移研究的作者...目的分析全球三阴性乳腺癌脑转移文献的分布规律和研究前沿,对三阴性乳腺癌脑转移的研究进行整体文献计量评价,为此后的相关研究提供方向。方法研究数据均来自WOS核心数据库,使用CiteSpace文献计量软件,对三阴性乳腺癌脑转移研究的作者、机构及国家分布、研究热点与演进趋势等进行数据可视化处理以及相关分析。结果共分析了2007年到2021年12月31日期间发表的文献共计393篇,出版物发表数量呈波动性上升的趋势,发表数量最多的一年为2021年,全球共计发表相关文献60篇。主要研究机构有丹娜·法伯癌症研究院(Dana-Farber Cancer Institute)、北卡罗来纳大学(The University of North Carolina System)等。关键词分析得到350个关键词、20簇主要关键词聚类和14个突现关键词,研究热点主要集中在治疗、肿瘤分型、生存期等方面。突变点分析显示,三阴性乳腺癌脑转移的趋势集中在信号通路以及细胞增殖研究上。结论本研究成果为三阴性乳腺癌脑转移提供了研究重点以及未来发展方向,可以进一步准确地指导学者的研究。展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.2017YFA0402400)the National Natural Science Foundation of China(Grant Nos.11974358 and 11934004)+1 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB34020000)the Heavy Ion Research Facility in Lanzhou(HIRFL).
文摘The state-selective cross section data are useful for understanding and modeling the x-ray emission in celestial observations.In the present work,using the cold target recoil ion momentum spectroscopy,for the first time we investigated the state-selective single electron capture processes for S^(q+)–He and H_(2)(q=11–15)collision systems at an impact energy of q×20 keV and obtained the relative state-selective cross sections.The results indicate that only a few principal quantum states of the projectile energy level are populated in a single electron capture process.In particular,the increase of the projectile charge state leads to the population of the states with higher principal quantum numbers.It is also shown that the experimental averaged n-shell populations are reproduced well by the over-barrier model.The database is openly available in Science Data Bank at 10.57760/sciencedb.j00113.00091.
文摘目的分析全球三阴性乳腺癌脑转移文献的分布规律和研究前沿,对三阴性乳腺癌脑转移的研究进行整体文献计量评价,为此后的相关研究提供方向。方法研究数据均来自WOS核心数据库,使用CiteSpace文献计量软件,对三阴性乳腺癌脑转移研究的作者、机构及国家分布、研究热点与演进趋势等进行数据可视化处理以及相关分析。结果共分析了2007年到2021年12月31日期间发表的文献共计393篇,出版物发表数量呈波动性上升的趋势,发表数量最多的一年为2021年,全球共计发表相关文献60篇。主要研究机构有丹娜·法伯癌症研究院(Dana-Farber Cancer Institute)、北卡罗来纳大学(The University of North Carolina System)等。关键词分析得到350个关键词、20簇主要关键词聚类和14个突现关键词,研究热点主要集中在治疗、肿瘤分型、生存期等方面。突变点分析显示,三阴性乳腺癌脑转移的趋势集中在信号通路以及细胞增殖研究上。结论本研究成果为三阴性乳腺癌脑转移提供了研究重点以及未来发展方向,可以进一步准确地指导学者的研究。
