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1三种釉色钧官瓷和现代高档钧瓷的中子活化分析显示文摘用中子活化分析(neutron activation analyses,NAA)技术测定了一组古钧官瓷和3个不同窑口现代高档钧瓷样品中25种元素的含量,从这些元素中筛选出能比较好的区分古钧官瓷和现代高档钧瓷的指纹元素,对这些指纹元素进行散布分析。结果表明:古钧官瓷的胎料来源比较集中,古钧官瓷胎和现代高档钧瓷胎的原料来源和分类关系明显不同;古钧官瓷釉和现代高档钧瓷釉的原料来源、配方和分类关系也明显不同,用NAA和指纹元素散布分析可以区分古钧官瓷和现代高档钧瓷样品。分析结果可为深入研究古钧官瓷和不同窑口现代高档钧瓷的原料来源、分类关系、鉴别以及提高仿古钧瓷的质量提供科学依据。李国霞 孙洪巍 李融武 赵维娟 赵青云 孙新民 赵文军 郭敏 谢建忠 高正耀 冯松林 杨勇 田红宇 杨大伟 2008硅酸盐学报2008,36,6:7
2Heavy mineral stratigraphy of sediments from the southern outer shelf of the East China Sea since the last glaciation using fuzzy C-means cluster method显示文摘Correspondence analysis and fuzzy C-means cluster methods were used to divide the stratigraphy of heavy mineral assemblages,and the sediment sources and depositional dynamics of the environment reconstructed.The assemblages were taken from marine sediments from the late Pleistocene to the Holocene in Core Q43 situated on the outer shelf of the East China Sea.Based on the variable boundaries of the mineral assemblage at 63 and 228 cmbsf (cm below sea floor),the core might have previously been divided into three sediment strata marked with units I,II and III,which would be consistent with the divided sediment stratum of the core using minor element geochemistry.The downcore distribution of heavy minerals divided the sedimentary sequence into three major units,which were further subdivided into four subunits.The interval between 0 and 63 cmbsf of the core (unit I),which spans the Holocene and the uppermost late Pleistocene,is characterized by a hornblende-epidote-pyroxene assemblage,and contains relatively a smaller amount of schistic mineral and authigenic pyrite.In comparison,the interval between 63 and 228 cmbsf (unit II),is representative of the Last Glacial Maximum (LGM),and features a hornblende-epidote-magnetite-ilmenite assemblage containing the highest concentrations of heavy minerals and opaque minerals.However,the interval between 228 and 309 cmbsf (unit III),which spans the subinterglacial period,is characterized by a hornblende-authigenic-pyrite-mica assemblage.Relative ratios of some heavy minerals can be used as tracers of clastic sediment sources.The lower part of the sediment core shows the highest magnetite/ilmenite ratio and relatively high hornblende/augite and hornblende/epidote ratios.The middle core shows the highest hornblende/augite and hornblende/epidote ratios,and the lowest magnetite/ilmenite ratio.The upper part exhibits a slightly higher magnetite/ilmenite ratio,and also the lowest hornblende/augite and hornblende/epidote ratios.The distribution of the mineral ratio is consistent with stratigraphic division in heavy mineral data using correspondence analysis and fuzzy C-means clustering.Variations in heavy mineral association and mineral ratio in core Q43 revealed changes in provenance and depositional environment of the southern outer shelf of the East China Sea since the late Pleistocene,well corresponding to interglacial and glacial cycles.林晓彤 李巍然 杜树杰 林振宏 2010Chinese Journal of Oceanology and Limnology2010,28,1:1
3Proton induced X-ray emission (PIXE) analysis of sources of porcelain body of Ru Guan and Jun Guan porcelains显示文摘34 samples of Ru Guan porcelain body and 50 samples of Jun Guan porcelain body (both kinds being in different body colors) were selected with the purpose of finding out the source of raw materials and their classification relationship so as to search for ways of non-destructive discrimination. Proton induced X-ray emission (PIXE) has been applied to these samples to determine their chemical elements. The data of seven major chemical elements collected from these samples were further studied through fuzzy cluster analysis. Results indicate that the origin of raw materials of Jun Guan porcelain body samples is comparatively more concentrated in certain places, while that of Ru Guan porcelain body samples is scattered about. The places of origin of raw materials of the majority of Ru Guan and Jun Guan porcelain body samples have something in common, but some differences still exist. It might be an important way for non-destructive discrimination among Ru Guan and Jun Guan porcelains by combining PIXE with fuzzy cluster analysis.LI Guoxia1, ZHAO Weijuan1, LI Rongwu2, SUN Hongwei1, GUO Min1, WANG Yanfang1, LIU Hui1, ZHAO Qingyun3, SUN Xinmin3, ZHAO Wenjun3 & CHENG Huansheng4 1. Faculty of Physical Engineering, Zhengzhou University, Zhengzhou 450052, China 2. Department of Physics, Beijing Normal University, Beijing 100875, China 3. Institute of Cultural Relic and Archaeology of Henan Province, Zhengzhou 450000, China 4. Institute of Modern Physics, Fudan University, Shanghai 200433, China 2006Science China(Physics,Mechanics & Astronomy)2006,49,4:1
4暖棚‘绿蓓3810’西葫芦栽培管理技术显示文摘文章从种子处理、营养土配制、播种、整地施肥、高垄定植、定植初期管理等方面,详细介绍‘绿蓓3810’西葫芦栽培管理技术。史影辉 李敬岩 沈淑芬 崔巨波 付志晶 2014中国园艺文摘2014,30,2:0
5对人口计生宣传教育工作的思考显示文摘0引言 自从我国在上世纪80年代初,把计划生育作为一项基本国策以来,这一基本国策已经实行30多年。在这30多年里,老百姓的生产生活和思想观念发生了巨大变化,我国的人口再生产类型实现了由高出生、低死亡、高增长向低出生、低死亡、低增长的历史性转变。同时,人口和计划生育工作也出现了许多新情况、新问题,特别是随着外来务工人群的大流动、异地婚姻的显著增加,使得计生服务的范围不断拓展,服务规模不断壮大,使计划生育工作覆盖面更宽,工作战线更长,计划生育工作难度越来越大。不断创新宣传教育的方式和方法,进一步转变广大育龄群众的婚育观念,势在必行。陆春燕 2014世界最新医学信息文摘2014,14,2:0
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