为探究当前国内外节水灌溉研究趋势和热点,基于CNKI和WOS核心数据库,检索2002-2021年关于节水灌溉的科技文献,利用VOSviewer可视化分析软件及数据库分析结果,对年发文量、发文国家和机构、发文期刊、高产作者和高引文献、研究主题以及...为探究当前国内外节水灌溉研究趋势和热点,基于CNKI和WOS核心数据库,检索2002-2021年关于节水灌溉的科技文献,利用VOSviewer可视化分析软件及数据库分析结果,对年发文量、发文国家和机构、发文期刊、高产作者和高引文献、研究主题以及关键词进行分析。结果表明:在2002-2021年,CNKI数据库年发文量波动较大,而WOS数据库发文量总体呈上升趋势,其中中国科研机构已经成为WOS数据库发文主力军;该领域文献主要发表在《节水灌溉》、《中国农村水利水电》、《灌溉排水学报》、《Agricultural Water Management》等期刊上,其中,《节水灌溉》发文量最高(752篇);该领域CNKI数据库发文量最高的作者为河海大学彭世彰教授,发文量为42篇,而WOS数据库发文量最高的作者为佛罗里达大学Dukes Michael D教授,发文量为28篇;该领域研究方向主要集中在灌溉方式、灌溉制度、水分利用效率等方面。节水灌溉研究在今后仍然是热点问题,我国科研工作者在该领域具有重大贡献,并且未来节水灌溉的发展方向应该是区域化、智能化、精准化。展开更多
The interaction of Si anions with Al sites during the hydration process was observed by NMR, IR and SEM to understand the reaction mechanism of the hydrates formation mixed with oil shale calcined at different tempera...The interaction of Si anions with Al sites during the hydration process was observed by NMR, IR and SEM to understand the reaction mechanism of the hydrates formation mixed with oil shale calcined at different temperatures. As the reaction progressed, the coordination of Al （Ⅳ, Ⅴ, and Ⅵ） changed almost completely to Ⅳ, when mixed with oil shale calcined at 700 ℃. However, when mixed with oil shale calcined at 400 ℃, some 6-coordination of Al still remained in the hydrates. Under the function of alkaline solutions, which were produced with the hydration of clinker, a certain amount of Si and Al atoms dissolved or hydrolyzed from aluminosilicate, formed geomonomers in solutions, and then polycondensed to form networks.展开更多
文摘为探究当前国内外节水灌溉研究趋势和热点,基于CNKI和WOS核心数据库,检索2002-2021年关于节水灌溉的科技文献,利用VOSviewer可视化分析软件及数据库分析结果,对年发文量、发文国家和机构、发文期刊、高产作者和高引文献、研究主题以及关键词进行分析。结果表明:在2002-2021年,CNKI数据库年发文量波动较大,而WOS数据库发文量总体呈上升趋势,其中中国科研机构已经成为WOS数据库发文主力军;该领域文献主要发表在《节水灌溉》、《中国农村水利水电》、《灌溉排水学报》、《Agricultural Water Management》等期刊上,其中,《节水灌溉》发文量最高(752篇);该领域CNKI数据库发文量最高的作者为河海大学彭世彰教授,发文量为42篇,而WOS数据库发文量最高的作者为佛罗里达大学Dukes Michael D教授,发文量为28篇;该领域研究方向主要集中在灌溉方式、灌溉制度、水分利用效率等方面。节水灌溉研究在今后仍然是热点问题,我国科研工作者在该领域具有重大贡献,并且未来节水灌溉的发展方向应该是区域化、智能化、精准化。
基金Supported by the National Science and Technology (2006BAE03A11)the National Natural Science Foundation of China(50674062)
文摘The interaction of Si anions with Al sites during the hydration process was observed by NMR, IR and SEM to understand the reaction mechanism of the hydrates formation mixed with oil shale calcined at different temperatures. As the reaction progressed, the coordination of Al （Ⅳ, Ⅴ, and Ⅵ） changed almost completely to Ⅳ, when mixed with oil shale calcined at 700 ℃. However, when mixed with oil shale calcined at 400 ℃, some 6-coordination of Al still remained in the hydrates. Under the function of alkaline solutions, which were produced with the hydration of clinker, a certain amount of Si and Al atoms dissolved or hydrolyzed from aluminosilicate, formed geomonomers in solutions, and then polycondensed to form networks.
