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PTtD Path and Fluid Evolution of HighPressure Eclogites from the Dabie Mountains,Central East china

Continental Dynamics 1999年第1期 44-52页

作者： ZHANG Zeming Institute of Geology, chinese academy of Geological {2. , Beijing 100037, china WEI Bize HAN Yujing YOU Zhendong china university of Geo{2., Wuhan 430001, china

In the Dabie high pressure (HP) and ultrahigh pressure (UHP) metamorphic belts, eclogites can be divided into two types, HP eclogites (or cold eclogite) and UHP eclogites. HP eclogites occur in the southern Dabie Mountains and are characterized by the presence of glaucophane. The primary mineral assemblage of the eclogites is garnet, omphacite, phengite, epidote, glaucophane, quartz, zircon and rutile. Garnet contains abundant mineral inclusions, and exhibits apparent compositional zoning with dramatic increases in MgO and decreases in MnO from core to rim. The PTtD path indicates that supracrustal rocks were metamorphosed and deformed from epidote amphibolite to eclogite facies by subduction and collision, then uplifted to the upper crust by thrust faulting in a continuous plate convergence and reworked by retrograde metamorphism of epidote amphibolite facies and by ductile deformation. The HP metamorphic rocks were uplifted to the surface, and modified by greenschist retrograde metamorphism and ductile to brittle deformation in an extensional environment. Fluid inclusions, melt inclusions and fluid bearing minerals indicate that fluid melt rock interaction was widespread in the eclogites. Partial melting occurred during the HP metamorphism, but the migration of melt was limited, and thus magma activity was very limited. Secondary fluid inclusions are abundant in the eclogites of the Dabie Mountains. They are mainly H 2. and CO 2.rich, and halite bearing multiphase fluid inclusions. Primary fluid inclusions have not been found, possibly because rapid uplift caused decrepitation of high density inclusions.

关键词： HP eclogite PTtD path fluid and melt inclusions Dabie Mountains

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Tail estimates for one-dimensional non-nearest-neighbor random walk in random environment

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Science china Mathematics 2010年第9期53卷 475-484页

作者： GAO ZhiQiang 1,2.1 School of Mathematical sciences, Beijing Normal university, Laboratory of Mathematics and Complex Systems, Ministry of Education, Beijing 100875, {2. 2.Laboratoire de Mathatiques et Applications des Mathmatiques, Universit de Bretagne-Sud, BP 573, Vannes 56017, France 1. School of Mathematical sciences Beijing Normal University Laboratory of Mathematics and Complex Systems Ministry of Education Beijing 100875 China2. Laboratoire de Mathéatiques et Applications des Mathématiques Université de Bretagne-Sud BP 573 Vannes 56017 France

Suppose that the integers are assigned i.i.d. random variables {(β gx , . . . , β 1x , α x )} (each taking values in the unit interval and the sum of them being 1), which serve as an environment. This environment defines a random walk {X n } (called RWRE) which, when at x, moves one step of length 1 to the right with probability α x and one step of length k to the left with probability β kx for 1≤ k≤ g. For certain environment distributions, we determine the almost-sure asymptotic speed of the RWRE and show that the chance of the RWRE deviating below this speed has a polynomial rate of decay. This is the generalization of the results by Dembo, Peres and Zeitouni in 1996. In the proof we use a large deviation result for the product of random matrices and some tail estimates and moment estimates for the total population size in a multi-type branching process with random environment.

关键词： random walks in random environment large deviations

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Discovery of hydrothermal venting community at the base of Cambrian barite in Guizhou Province,Western china: Implication for the Cambrian biological explosion

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Progress in Natural Science:Materials International 2008年第1期18卷 65-70页

作者： Ruidong Yang*,Huairui Wei,Miao Bao,Wei Wang,Qiang Wang, Xiaodong Zhang,Ling Liu graduate School of Guizhou university,Guiyang 55002.,{2. graduate School of Guizhou university Guiyang 550025 China

The barite deposit in the Niutitang Formation of Lower Cambrian,in Tianzhu County,Guizhou Province,western china,is a super- large barite deposit with about 2.109tons of ***,petrological and geochemical studies reveal that this barite deposit belongs to a hydrothermal sedimentary *** observations indicate that a lot of algae,sponge spicules and tube-type fos- sils are well-preserved in this barite section,and moreover,those fossils share most characteristics of the deep-sea hydrothermal venting community in the modern *** suggest that the hydrothermal venting community was thriving in hydrothermal vent in early Cam- brian,and it is of great significance for elucidating the geological background of the‘‘Cambrian explosion’’.china *** rights reserved.

关键词： Hydrothermal community Barite Cambrian Guizhou

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Two granitic plutons in Central Western Kunlun Belt: Their ages and possible sources

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Science Bulletin 1999年第19期 3-5页

作者： YUAN Chao, SUN Min and LI Jiliang Department of Earth sciences , The university of Hong Kong , Hong Kong , {2. Institute of Geology, chinese academy of sciences , Beijing 10002., {2.

Geochronological and isotope studies have been carried out for two important plutons in the Central Western Kunlun Belt. U-Pb single grain zircon dating results show that the North Kudi Pluton (404 Ma) was produced near the end of Caledonian; whereas the previously labeled Hercynian Arkarz Mountain Pluton (2.5 Ma) is either an Indosinian pluton or a product of

关键词： granitic pluton. Central Western Kunlun Belt.

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WATER SOURCES OF DOMINANT SPECIES IN THREE ALPINE ECOSYSTEMS ON THE TIBETAN PLATEAU,china

WATER SOURCES OF DOMINANT SPECIES IN THREE ALPINE ECOSYSTEMS...

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第三世界生态高峰会

作者： Duan D.Y.~(1.2. Ouyang H.,~1 Song M.H.,~1 Hu Q.W~(1,2. Xu X.L.~1 ~1Institute of Geographical sciences and Natural Resources Research,chinese {2. of sciences.Beijing 100101.~2.4} university of chinese {2. of sciences.Beijing 100039

Variations in plant water sources and water uptake patterns were important to responses of terrestrial ecosystems to changes of precipitation *** identification of plant water sources is essential for our understanding vegetation responses to spatial and temporal changes in precipitation and assessing accurately the future vegetation distribution in senti-arid and arid *** water sources were estimated by two or three compartment linear mixing models using δD and δO values of different components such as plant xylem water,precipitation and river water as well as soil water in Tibetan Plateau in the summer of *** dominant species （Quercus aquifolioides,Pinus tabulaeformis,Salix rehderiana and Nitraria tangutorum）in three ecosystem types（forest,shrub and desert ecosystems）were investigated in this *** isotope ratios of the summer precipitations and the soil water presented variations in spatial and temporal scales.δO values of *** xylem water were constant in the whole growth season and very similar to those of deep soil *** sources for all the plants came from both precipitations and soil *** switched rapidly among different water sources when environmental water conditions changed. Rainwater had different contributions to the plants,which was influenced by amounts of *** percentage of plant xylem water derived from rainwater raised with an increase of precipitation. Water sources for broad-leaved and coniferous species were different although they grew in the same *** example,the broad-leaved species *** used mainly the water from deep

关键词： δD δ18O precipitation river water soil water the Tibetan Plateau

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Systems Biology and Complex Disease

Systems Biology and Complex Disease

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第二十六届中国控制会议

作者： Wu Jiarui1,2.1 Key Laboratory of Systems Biology,Institute of Biochemistry and Cell Biology,Shanghai Institutes for Biological sciences,chinese {2. of sciences,shanghai 2.0000 P.R.china2.Department of Systems Biology,university of Science and Technology of china,Hefei 2.0000 P.R.china

After "Human Genome Project" has been accomplished,the life science comes to a new era,the post-genome *** the post-genome era,the "big sciences" such as genomics,proteomics and metabolomics （so-called "omics"） gradually become a new popular research methodology to provide global pictures of cells or organisms,although the classical experimental biology （small sciences） such as molecular biology or cell biology is still the mainstream in life *** concept and strategy of omics is completely different from the classical experimental *** omics is called a "discovery science",of which the goal is to identify all the genes or proteins in the organisms,whereas the classical experimental biology such as molecular biology is called a "hypothesis-driven science",since the researches of these disciplines are initiated based on the scientific hypothesis and focus on studying the structure and functions of individual gene or protein.

关键词： Systems biology Complex disease Omics

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冬小麦/夏玉米轮作中NO_3^-N在土壤剖面的累积及移动

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土壤学报 2003年第4期40卷 538-546页

作者：巨晓棠刘学军张福锁中国农业大学植物营养系

通过田间试验研究了冬小麦 /夏玉米轮作中NO- 3 N在土壤剖面的累积及移动 ,结果表明 ,尿素施入旱地土壤后 ,硝化作用一般在 7d之内完成 ,NH+ 4 N只在施肥后的短期内保持较高浓度 ,其它时期NH+ 4 N含量基本在 1～ 3mgkg- 1 范围内 ,土壤... 详细信息

通过田间试验研究了冬小麦 /夏玉米轮作中NO- 3 N在土壤剖面的累积及移动 ,结果表明 ,尿素施入旱地土壤后 ,硝化作用一般在 7d之内完成 ,NH+ 4 N只在施肥后的短期内保持较高浓度 ,其它时期NH+ 4 N含量基本在 1～ 3mgkg- 1 范围内 ,土壤剖面不同层次NH+ 4 N一般也低于 4mgkg- 1 ,NH+ 4 N的含量不能反映土壤有效氮的水平。土壤剖面中的NO- 3 N随施氮量的增加而显著升高。在低施氮量条件下 (N 2.0kghm- 2.) ,NO- 3 N主要在 0～ 40cm土层内移动 ,但当施氮量高于N 2.40kghm- 2.时 ,冬小麦季即有相当数量的氮移出 0～ 10 0cm土体。NO- 3 N在土体中的移动存在着很大的年际变化 ,在干旱年份 ,即使夏玉米季 ,NO- 3 N向深层移动的可能性也很小。试验年份中 ,除 1999年夏玉米季发生了较严重的气体损失以外 (该季节特别干旱 ) ,其余季节损失的肥料氮主要以NO- 3 N的形式在深层土壤剖面中累积 ,这在两个试验点的结果相当一致。

关键词：冬小麦夏玉米轮作 NO3^-N 土壤剖面养分累积田间试验

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Experimental Investigation on Flow and Drying Characteristics of Impinging Stream Drying

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Journal of university of Science and Technology Beijing 2001年第2期8卷 141-144页

作者： Xiulan Huai, Dengying Liu, Xiaoming Cui, Qun Meng (Institute of Engineering Thermophysics, Chemise academy of sciences, P. O. Box 2.06, Beijing 100080, {2.) chinese Acad Sci Inst Engn Thermophys Beijing 100080 Peoples R China

Based on the experimental investigation of one-stage semi-circular impinging stream drying, the experiments with the two-stage semi-circular, as well as the vertical and semi-circular combined impinging stream drying were conducted. The variations of system pressure drop, the mean residence time of particles with the mass flow-rate ratio and air velocity etc, were determined. The influences of inlet air temperature, mass flow-rate ratio, initial moisture content of particles and air velocity etc. on drying characteristics were also studied. The results indicate that the vertical and semi-circular combined impinging stream drying can make full use of the advantages of both the vertical and semi-circular impinging stream drying. Reasonable mass flow-rate ratio, air velocity, and higher inlet air temperature should be used for less energy consumption and cost during drying process.

关键词： two-stage semi-circular impinging stream drying combined impinging stream drying flow characteristics drying characteristics

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台锥形液相色谱柱内谱带流型的动态可视化研究

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色谱 2003年第2期21卷 106-109页

作者：马继平陈令新朱道乾关亚风中国科学院大连化学物理研究所

利用自制的台锥形色谱柱内谱带流型可视化研究装置,对台锥形色谱柱内样品谱带的流型进行研究。将以有机玻璃为柱管、内填C18色谱固定相的色谱柱浸入无毒溶剂丙三醇池中,以消除圆柱或圆锥的透镜效应。当以环己烷为流动相时,即使在中心点... 详细信息

利用自制的台锥形色谱柱内谱带流型可视化研究装置,对台锥形色谱柱内样品谱带的流型进行研究。将以有机玻璃为柱管、内填C18色谱固定相的色谱柱浸入无毒溶剂丙三醇池中,以消除圆柱或圆锥的透镜效应。当以环己烷为流动相时,即使在中心点进样的情况下也可清晰地观察到色谱柱内有色样品碘的谱带流型。流型图像的数字信号利用数码照相机获取。通过对入口内径大于出口内径的台锥形与出入口内径相同的圆柱形柱内样品谱带的流型研究发现,在相同的实验条件下,台锥形柱内呈现与圆柱形柱内样品谱带流型曲率方向相反的抛物线流型。这是由台锥形柱特殊的结构造成的。由于台锥形柱斜面的存在使流体在管壁区的受力情况不同于圆柱的管壁区,因此通过改变台锥形柱的结构有可能获得具有塞子状的流型,这对于提高色谱柱柱效具有重要指导意义。

关键词：台锥形液相色谱柱谱带流型动态可视化液相色谱柱效

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Effect of Mixed Forests of chinese Fir and Tsoong's Tree on Soil Properties

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Pedosphere 1998年第2期 66-73页

作者： ZHENG YUSHAN 1 and DING YINGXIANG 2.1 Department of Forest Resources and Environment, Fujian Forestry College,Nanping 351001 (china) 2.College of Forest Resources and Environment, Nanjing Forestry university,Nanjing 2.0037 (china)

Ｔｓｏｏｎｇ’ｓｔｒｅ（ＴｓｏｎｇｉｏｄｅｎｄｒｏｎｏｄｏｒｕｍＣｈｕｎ）ｉｓａｎａｎｃｉｅｎｔａｎｄｖｅｓｔｉｇｅｓｐｅｃｉｅｓｗｈｉｃｈｉｓｅｘｃｌｕｓｉｖｅｌｙｄｉｓｔｒｉｂｕｔｅｄｉｎＣｈｉｎａ．Ｔｈｅｔｒｅ... 详细信息

Ｔｓｏｏｎｇ’ｓｔｒｅ（ＴｓｏｎｇｉｏｄｅｎｄｒｏｎｏｄｏｒｕｍＣｈｕｎ）ｉｓａｎａｎｃｉｅｎｔａｎｄｖｅｓｔｉｇｅｓｐｅｃｉｅｓｗｈｉｃｈｉｓｅｘｃｌｕｓｉｖｅｌｙｄｉｓｔｒｉｂｕｔｅｄｉｎＣｈｉｎａ．Ｔｈｅｔｒｅｅｇｒｏｗｓｆａｓｔａｎｄｉｔｓｗ...

关键词： chinese fir mixed forest soil properties Tsoong’s tree

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