目的:基于CiteSpace对国内外有关分娩恐惧的研究现状、热点和趋势进行可视化分析。方法:检索Web of Science核心合集(WOS)和中国知网(CNKI)相关文献记录,通过CiteSpace 5.8.R3对作者、国家、机构和关键词等内容进行可视化分析。结果:共...目的:基于CiteSpace对国内外有关分娩恐惧的研究现状、热点和趋势进行可视化分析。方法:检索Web of Science核心合集(WOS)和中国知网(CNKI)相关文献记录,通过CiteSpace 5.8.R3对作者、国家、机构和关键词等内容进行可视化分析。结果:共纳入中文文献119篇、外文文献916篇;发文量呈持续增长趋势,居前5位的国家分别为瑞典、美国、英国、澳大利亚和爱尔兰;研究热点集中在影响因素、评估工具、产前照护、分娩经历、分娩方式、焦虑等。结论:通过CiteSpace软件直观展现国内外分娩恐惧研究热点,可为研究者提供新的研究视角。展开更多
The adsorption and diffusion of N atoms on the three low-index Cu planes were studied using 5-parameter Morse potential (5-MP) method, and the best theory-experiment agreement was obtained. N atom of Cu(100) surface s...The adsorption and diffusion of N atoms on the three low-index Cu planes were studied using 5-parameter Morse potential (5-MP) method, and the best theory-experiment agreement was obtained. N atom of Cu(100) surface sit on the fourfold hollow site with the vertical height of 0.018 nm closely coplanar with the topmost copper layer, and the four CuN bond lengths are 0.182 nm and the fifth CuN distance is 0.199 nm. For Cu(111) system, the existence of aberrant Cu(100) reconstructed structure is approved at higher coverage, and at low coverage the structure is almost an ideal Cu(111) surface structure. With respect to Cu(110) system, the N atoms are adsorbed at LB and H3 sites, not at SB site. The diffusion passage and diffusion barrier of adsorbed N atoms were also studied.展开更多
文摘目的:基于CiteSpace对国内外有关分娩恐惧的研究现状、热点和趋势进行可视化分析。方法:检索Web of Science核心合集(WOS)和中国知网(CNKI)相关文献记录,通过CiteSpace 5.8.R3对作者、国家、机构和关键词等内容进行可视化分析。结果:共纳入中文文献119篇、外文文献916篇;发文量呈持续增长趋势,居前5位的国家分别为瑞典、美国、英国、澳大利亚和爱尔兰;研究热点集中在影响因素、评估工具、产前照护、分娩经历、分娩方式、焦虑等。结论:通过CiteSpace软件直观展现国内外分娩恐惧研究热点,可为研究者提供新的研究视角。
基金Project supported by the Community of Shandong Natural Science Foundation (No. Y2002B09).
文摘The adsorption and diffusion of N atoms on the three low-index Cu planes were studied using 5-parameter Morse potential (5-MP) method, and the best theory-experiment agreement was obtained. N atom of Cu(100) surface sit on the fourfold hollow site with the vertical height of 0.018 nm closely coplanar with the topmost copper layer, and the four CuN bond lengths are 0.182 nm and the fifth CuN distance is 0.199 nm. For Cu(111) system, the existence of aberrant Cu(100) reconstructed structure is approved at higher coverage, and at low coverage the structure is almost an ideal Cu(111) surface structure. With respect to Cu(110) system, the N atoms are adsorbed at LB and H3 sites, not at SB site. The diffusion passage and diffusion barrier of adsorbed N atoms were also studied.
