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What drove late Mesozoic extension of the northern China-Mongolia tract?

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What drove late Mesozoic extension of the northern China-Mon...

中国科学院地质与地球物理研究所2.03.术年会

作者： Qing-Ren Meng~* institute of Geology and Geophysics,chinese {2. of {3.,PO Box 982.,beijing 10002.,China

The northern China-Mongolia tract exhibited a tectonic transition from contractional to extensional deformation in late Mesozoic *** Middle to early Late Jurassic crustal shortening is widely thought to have resulted from collision of an amalgamated North China-Mongolia block and the Siberian plate,but widespread late Late Jurassic-Early Cretaceous extension has not been satisfactorily explained by existing *** prominent features of the extensional tectonics of the northern China-Mongolia tract are:(1) Late Jurassic voluminous volcanism prior to Early Cretaceous large-magnitude rapid extension;(2. overlapping in time of contractional deformation in the Yinshan-Yanshan belt with development of extension-related basins in the interior of the northern China-Mongolia tract;and(3. widespread occurrence of alkali granitic plutonism. extensional basins and metamorphic core complexes in the Early Cretaceous.A new explanation is advanced in this study for this sequence of *** collision of amalgamated North China-Mongolia with Siberia led to crustal overthickening of the northern China-Mongolia tract and formation of a high-standing *** breakoff at depth of the north-dipping Mongol-Okhotsk oceanic slab is suggested as the main trigger for late Mesozoic lithospheric extension of that *** breakoff resulted in mantle lithospheric stretching of the adjacent northern China-Mongolia tract with subsequent ascent of hot asthenosphere and magmatic underplating at the base of the ***,these phenomena triggered gravitational collapse of the previously thickened crust,leading to late Late Jurassic-Early Cretaceous crustal extension,and importantly, coeval contraction along the southern margin of the plateau in the Yinshan-Yanshan *** proposed model provides a framework for interpreting the spatial and temporal relationships of distinct processes and reconciling some seemingly contradictory phenomena,such as the synchronous ext

关键词： Crustal extension Gravitational collapse Yinshan Daqing Shan Northern China and Mongolia

Symmetry of Y_5 Deformation and Two-Level Model

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chinese journal of nuclear physics 1994年第4期 337-343页

作者： Zhang Xi-zhen~(1,2. Dong Bao-guo~(1)(1 China institute of Atomic Energy,P.O.Box 2.5(18),beijing 102.1{2.(2.institute of Theoretical Physics,{{2. academy of Science,beijing 100080)

The symmetry of Y5μ-deformed fields are classified and the one-particlespectra in two-level model coupled by Y5μ fields are discussed.

关键词： Y5μ-deformed clusters Two-level model Single particle

Research on Electric Field Confinement Effect in Silicon LED Fabricated by Standard CMOS Technology

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Semiconductor Photonics and Technology 2010年第Z1期 83-86+91页

作者： YANG Guanghua1,2.WANG Wei3.1.Electronic and Information School,Tianjin University,Tianjin 3.0072.CHN 2.Information and Communication Inst.,Tianjin Polytechnic University,Tianjin 3.0160,CHN 3.institute of Semiconductors of chinese {2. of {3.,beijing 100083.CHN)

The wedge-shaped and leaf-type silicon light-emitting devices(LED)are designed and fabricated with the Singapore Chartered Semi Inc.'s dual-gate standard 0.3.μm CMOS *** basic structure of the two devices is N well-P+ junction.P+ area is the wedge-shaped structure,which is embedded in N *** leaf-type silicon LED device is a combination of the three wedge-shaped LED *** main difference between the two devices is their different electrode distribution,which is mainly in order to analyze the application of electric field confinement(EFC).The devices' micrographs were measured with the Olympus IC test *** forward and reverse bias electrical characteristics of the devices were *** measurements of the devices show that the electrode layout is very important when the electric field confinement is applied.

关键词： silicon LED standard CMOS technology electric field confinement effect

Study on the Ultrastructures of Antennal Sensilla in Helicoverpa armigera

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Agricultural sciences in China 2002年第8期1卷 896-899页

作者： WANG Gui-rong, GUO Yu-yuan and WU Kong-ming( State Key Laboratory of Plant Disease and Insect Pests, The institute of Plant Protection , chinese {2. of Agricultural {3., beijing 100094 , P. R . China ) State Key Laboratory of Plant Disease and Insect Pests The Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100094 P. R . China

The morphology and structures of antennal sensilla of Helicoverpa armigera are observed under scanning and transmission electron microscopes. Antennae of Helicoverpa armigera are made up of scapus, pedicel and flagellum that the latter consists of 70 - 82.segments. The inner side surface of antenna is cat-aphracted and most of the antennal sensilla lie on its outer, upper and lower surfaces. Both the antennae of male and female contain five kinds of antennal sensilla, namely, sensillum trichodeum, sensillum basicon-icum, sensillum chaeticum, ear-shaped sensillum and sensillum coeloconicum, and the kinds, number and distribution of antennal sensilla of both sexes are similar. There are a large number of serrate cuticular processes on antennal surface, especially on the middle and basic parts of antenna. Sensillum trichodeum and sensillum basiconicum, the main chemical odor receptors on antennae of Helicoverpa armigera, consist of cuticular-wall, sheath cells, lymph and dendrites. There are significant differences between the internal structures of the two kinds of sensilla. In sensillum trichodeum, the cuticular-wall is thicker, less lipophilic pore channels and has one or a few dendrites, while in sensillum basiconicum, the cuticular-wall is thinner, abundant lipophilic pore channels and has much more dendrites.

关键词： Helicoverpa armigera Antennal sensillum Ultrastructures Scanning electron microscope Transmission electron microscope

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黑水县芦花沟泥石流灾害治理现状与建议

山地学报 2006年第2期24卷 181-185页

作者：张金山王士革孟国才张桂香中国科学院水利部成都山地灾害与环境研究所中国科学院水利部成都山地灾害与环境研究所四川成都610041 四川成都610041中国科学院研究生院北京100049

芦花沟是岷江水系黑水河中游右岸一级支流,历史上曾多次暴发泥石流,对黑水县城芦花镇造成了严重的危害和威胁。自上世纪80年代对其进行综合治理后,泥石流得到了有效控制。但由于工程年久失修,加之近几年降水量偏高,该沟泥石流有进一步... 详细信息

芦花沟是岷江水系黑水河中游右岸一级支流,历史上曾多次暴发泥石流,对黑水县城芦花镇造成了严重的危害和威胁。自上世纪80年代对其进行综合治理后,泥石流得到了有效控制。但由于工程年久失修,加之近几年降水量偏高,该沟泥石流有进一步活跃的趋势。仅2.04年就发生了3.泥石流,其中09-3.泥石流冲出物近1×104m3.规模较大,并在排导槽中产生堵塞,幸得当地政府及时启动紧急预案进行了疏通,县城才得以平安。为了消除隐患,减轻灾害,我们对该沟泥石流进行了调查分析,提出了相应的应急措施和进一步防治对策。

关键词：芦花沟泥石流治理

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句子重音对汉语同音异义词的解歧作用

心理学报 2003年第3期35卷 333-339页

作者：仲晓波吕士楠北京师范大学心理学系中国科学院声学研究所北京100080

通过针对包含两对汉语同音异义词 (“qui(4)shi(4)”(“趣事”或“去世”和“sheng(1 )xue(2.)”(“声学”或“升学”) )的 1 0个发音人语料的声学特征分析和知觉实验 ,结果发现 :消除这两对同音异义词歧义的不是词重音而是句子重音。... 详细信息

通过针对包含两对汉语同音异义词 (“qui(4)shi(4)”(“趣事”或“去世”和“sheng(1 )xue(2.)”(“声学”或“升学”) )的 1 0个发音人语料的声学特征分析和知觉实验 ,结果发现 :消除这两对同音异义词歧义的不是词重音而是句子重音。这个研究结果说明

关键词：同音异义词词重音句子重音解歧

Contrasting Provenance of Late Archean Metasedimentary rocks from the Wutai Complex, North China Craton: Detrital zircon U-Pb, Sm-Nd and geochemical data

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Contrasting Provenance of Late Archean Metasedimentary rocks...

2.06年全国岩石学与地球动力学研讨会

作者： Qiugen Li, Shuwen Liu , Zongqi Wang , Zhuyin Chu , Biao Song , Yanbin Wang , Chaohui Liu, Shengqiang Yu & Tao Wang ( institute of Geology, chinese academy of geological sciences,{2., People '' s Republic of China The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space {3., Peking University, beijing 100871, People '' s Republic of China geological and Geophysical institute, chinese academy of {3., beijing 10002., People '' s Republic of China )

＜正＞Sedimentary rocks are principal proxies for past conditions on the Earth’s surface, and may provide the available clues to trace the nature of old crustal development, when the original source rocks are not longer preserved due to decomposition and erosion （Gao and Wedepohl, 1995;Yamashita and Creaser, 1999）. Furthermore, geochemical method is increasingly applied as a

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Heat Sensitivel is essential for protecting editing of accD chloroplast transcripts and chloroplast biogenesis in Arabidopsis under heat stress

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Heat Sensitivel is essential for protecting editing of accD ...

2.11全国植物生物学研讨会

作者： Linlin Zhong,Congming Lu~* Key Laboratory of Photobiology,institute of Botany,chinese {2. of {3.,beijing 100093. China

High temperature is one of the major environmental stresses that greatly depress the growth of *** plants have evolved multiple mechanisms to adapt to heat stress,the detailed molecular mechanisms remain be *** this study,we characterized the heat sensitive1(hs1) mutant of Arabidopsis thaliana,which showed albino phenotype under heat stress(3.℃) but had no significant difference with wild type under normal growth temperature(2.℃).Under heat stress condition,hs1 had lower photosystemⅠandⅡactivity,and chloroplast development was arrested. Immunoblot analyses showed that the levels of plastid-encoded proteins were reduced

关键词： Chloroplast biogenesis Heat Sensitive1 heat stress RNA editing accD Arabidopsis

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人类基因组突变热点区的简并度特异基因

生物化学与生物物理进展 2004年第12期31卷 1091-1098页

作者：刘强徐军陈润生中国科学院生物物理研究所北京100101 Department of Physiological Science and Laboratory of Neuroendocrinology of The Brain Research institute University of California

突变热点区域是基因突变相对集中的区域 ,在生物的遗传和变异中有特殊的地位 .针对特殊条件下发生突变形成的突变热点区域进行了相关研究 .而人类基因组序列的测定和人类基因框架图的绘制 ,为在全基因组范围内进行突变热点研究提供了条... 详细信息

突变热点区域是基因突变相对集中的区域 ,在生物的遗传和变异中有特殊的地位 .针对特殊条件下发生突变形成的突变热点区域进行了相关研究 .而人类基因组序列的测定和人类基因框架图的绘制 ,为在全基因组范围内进行突变热点研究提供了条件 .分析了人类基因组中 2.83.个基因突变热点区域上简并度的性质 ,对突变热点区集中在高简并度区或者低简并度区的基因生物学功能进行了分析和分类 .研究的焦点集中在某类功能的基因简并度特性一致的情况上 .对搜集到的基因简并度特性利用聚类计算进行分析 ,找到了一些特殊的功能类 ,属于其中某类功能的基因能够通过聚类分析聚合到一起 ,从而说明简并度特性也是相近的。

关键词：突变热点,简并度,聚类分析,人类基因组,单核苷酸多态性(SNP)