为全面认识国际汶川地震研究的合作与主题态势,利用科睿唯安Web of Science数据库采集了3 158篇汶川地震研究论文,使用科学计量学方法对国际汶川地震研究的国家/地区、机构和作者合作网络进行了分析。采用关键词词频和共词分析的方法,...为全面认识国际汶川地震研究的合作与主题态势,利用科睿唯安Web of Science数据库采集了3 158篇汶川地震研究论文,使用科学计量学方法对国际汶川地震研究的国家/地区、机构和作者合作网络进行了分析。采用关键词词频和共词分析的方法,对国际汶川地震研究热点、主题类团和新兴主题进行了研究。研究结果表明:关于汶川地震的研究从2008—2009年开始显著增长,之后保持平稳;我国产出量第一,且在汶川地震研究合作中处于国家/地区的核心,与美国、日本和英格兰合作密切;机构层面上,中国科学院和中国地震局位于核心位置;徐锡伟和黄润秋是汶川地震研究中的代表作者;国际汶川地震热点主题涉及了滑坡、泥石流、芦山地震、创伤后应激障碍、地理信息系统、遥感等方面,并围绕高频关键词形成了"地震对人心理的影响(例如PTSD)"、"地理信息系统和遥感技术在汶川地震中应用"、"汶川地震引起的地质灾害和数值分析"以及"龙门山断裂带与汶川和芦山地震"4大主题聚类,其中"地震对人心理的影响(例如PTSD)"和"龙门山断裂带与汶川和芦山地震"是目前活跃的主题聚类。展开更多
The preparation and adsorption of thiourea modified glutaraldehyde-crosslinked chitosan resin （Thio-chitosan） using cyanuric chloride as activator was studied. The adsorptive capacity of thio-chitosan with 15% appar...The preparation and adsorption of thiourea modified glutaraldehyde-crosslinked chitosan resin （Thio-chitosan） using cyanuric chloride as activator was studied. The adsorptive capacity of thio-chitosan with 15% apparent degree of crosslinking （DC, mass ration of glutaraldehyde to chitosan） to Cu（Ⅱ） was 160mg/g （dry weight）. The adsorption of Cu（Ⅱ） was correlated with Freundlich and Langmuir isotherm equation. Cu（Ⅱ） adsorbed on thio-chitosan column （ 1cm×10cm） was eluted with 0.5mol/L H2SO4, 6mol/L HCI and 3% thiourea solution with the recovery of 88.3%, 86.1% and 95.3%, respectively. The thio-chitosan resin can be applied to the separation and recovery of metal ions.展开更多
This paper studies pool fires in open air and their damage laws. First, it discusses the damage criteria of thermal radiation, then presents an algorithm to predict damage radii of pool fires, and performs numerical c...This paper studies pool fires in open air and their damage laws. First, it discusses the damage criteria of thermal radiation, then presents an algorithm to predict damage radii of pool fires, and performs numerical calculations by using a software called POOLFIRE, which has been developed by the authors, finally discusses the possible ways to improve the algorithm and gives the conclusions obtained from the study.展开更多
文摘为全面认识国际汶川地震研究的合作与主题态势,利用科睿唯安Web of Science数据库采集了3 158篇汶川地震研究论文,使用科学计量学方法对国际汶川地震研究的国家/地区、机构和作者合作网络进行了分析。采用关键词词频和共词分析的方法,对国际汶川地震研究热点、主题类团和新兴主题进行了研究。研究结果表明:关于汶川地震的研究从2008—2009年开始显著增长,之后保持平稳;我国产出量第一,且在汶川地震研究合作中处于国家/地区的核心,与美国、日本和英格兰合作密切;机构层面上,中国科学院和中国地震局位于核心位置;徐锡伟和黄润秋是汶川地震研究中的代表作者;国际汶川地震热点主题涉及了滑坡、泥石流、芦山地震、创伤后应激障碍、地理信息系统、遥感等方面,并围绕高频关键词形成了"地震对人心理的影响(例如PTSD)"、"地理信息系统和遥感技术在汶川地震中应用"、"汶川地震引起的地质灾害和数值分析"以及"龙门山断裂带与汶川和芦山地震"4大主题聚类,其中"地震对人心理的影响(例如PTSD)"和"龙门山断裂带与汶川和芦山地震"是目前活跃的主题聚类。
基金Project Supported by： The Natural Science Foundation of Anhui Educational Committee （No. 2004kj066）
文摘The preparation and adsorption of thiourea modified glutaraldehyde-crosslinked chitosan resin （Thio-chitosan） using cyanuric chloride as activator was studied. The adsorptive capacity of thio-chitosan with 15% apparent degree of crosslinking （DC, mass ration of glutaraldehyde to chitosan） to Cu（Ⅱ） was 160mg/g （dry weight）. The adsorption of Cu（Ⅱ） was correlated with Freundlich and Langmuir isotherm equation. Cu（Ⅱ） adsorbed on thio-chitosan column （ 1cm×10cm） was eluted with 0.5mol/L H2SO4, 6mol/L HCI and 3% thiourea solution with the recovery of 88.3%, 86.1% and 95.3%, respectively. The thio-chitosan resin can be applied to the separation and recovery of metal ions.
文摘This paper studies pool fires in open air and their damage laws. First, it discusses the damage criteria of thermal radiation, then presents an algorithm to predict damage radii of pool fires, and performs numerical calculations by using a software called POOLFIRE, which has been developed by the authors, finally discusses the possible ways to improve the algorithm and gives the conclusions obtained from the study.
