利用ArcGIS Living Atlas of the World,基于“木里藏族自治县3.28森林火灾”受灾区域的地形、降雨量和植被等资料,采用GIS技术和加权综合法,对研究区域的山体滑坡敏感性进行分析评价。结果发现,研究区以中高风险区为主,占整个研究区总...利用ArcGIS Living Atlas of the World,基于“木里藏族自治县3.28森林火灾”受灾区域的地形、降雨量和植被等资料,采用GIS技术和加权综合法,对研究区域的山体滑坡敏感性进行分析评价。结果发现,研究区以中高风险区为主,占整个研究区总面积的71%,是发生山体滑坡风险的主体部分。高风险区域有两条道路经过,需要重点防范。通过使用Living Atlas数据来查找森林火灾过火区域内绿色植被较少、坡度较高和降雨水平较高的区域,可以有效地节省人力物力,并实现长期快速检测。展开更多
A series of novel Sm3＋-doped LiY（MoO4）2 red phosphors under the UV excitation were synthesized by solid state reaction at 800 ℃ for 7 h. The data measured by X-ray diffraction （XRD） indicated that the samples we...A series of novel Sm3＋-doped LiY（MoO4）2 red phosphors under the UV excitation were synthesized by solid state reaction at 800 ℃ for 7 h. The data measured by X-ray diffraction （XRD） indicated that the samples were all pure phases of LiY（MoO4）2. Their excitation spectra had a broad band ranging from 250 to 350 nm and several sharp peaks. The centers of the peaks were located at about 365 nm （6H5/2→4D3/2）, 378 nm （6H5/2→rp7/2）, 406 nm （6H5/2→4FT/2）, 420 nm （6H5/2→6ps/2）, 442 nm （6H5/2→4Gg/2）, 471 nm （6H5/2→4I13/2） and 482 nm （6H5/2→419/2）, respectively. The strongest emission was excited by 406 nm, and the main emissions were located at 568 nm （4G5/2→6Hs/2）, 610 nm （4Gs/2→rH7/2）, 649 nm （4G5/2→6H9/2） and 710 nm （4Gs/2→6HII/2）. Photoluminescence prop- erties were determined for various concentrations of Sm3＋-doped LiY（MoO4）2 host, and the luminescence intensity had the best value when x=0.02 in LiYix（MoO4）2：xSm3＋.展开更多
文摘利用ArcGIS Living Atlas of the World,基于“木里藏族自治县3.28森林火灾”受灾区域的地形、降雨量和植被等资料,采用GIS技术和加权综合法,对研究区域的山体滑坡敏感性进行分析评价。结果发现,研究区以中高风险区为主,占整个研究区总面积的71%,是发生山体滑坡风险的主体部分。高风险区域有两条道路经过,需要重点防范。通过使用Living Atlas数据来查找森林火灾过火区域内绿色植被较少、坡度较高和降雨水平较高的区域,可以有效地节省人力物力,并实现长期快速检测。
基金Project supported by National Natural Science Foundation of China(51202053)Natural Science Foundation of Hebei Province(Q2012061)China Postdoctoral Science Foundation(2013M530884)
文摘A series of novel Sm3＋-doped LiY（MoO4）2 red phosphors under the UV excitation were synthesized by solid state reaction at 800 ℃ for 7 h. The data measured by X-ray diffraction （XRD） indicated that the samples were all pure phases of LiY（MoO4）2. Their excitation spectra had a broad band ranging from 250 to 350 nm and several sharp peaks. The centers of the peaks were located at about 365 nm （6H5/2→4D3/2）, 378 nm （6H5/2→rp7/2）, 406 nm （6H5/2→4FT/2）, 420 nm （6H5/2→6ps/2）, 442 nm （6H5/2→4Gg/2）, 471 nm （6H5/2→4I13/2） and 482 nm （6H5/2→419/2）, respectively. The strongest emission was excited by 406 nm, and the main emissions were located at 568 nm （4G5/2→6Hs/2）, 610 nm （4Gs/2→rH7/2）, 649 nm （4G5/2→6H9/2） and 710 nm （4Gs/2→6HII/2）. Photoluminescence prop- erties were determined for various concentrations of Sm3＋-doped LiY（MoO4）2 host, and the luminescence intensity had the best value when x=0.02 in LiYix（MoO4）2：xSm3＋.
