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Barium Anomaly and Its Geochemical Significance

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Continental Dynamics 1999年第1期 84-87页

作者： WANYusheng Institute of Geology, chinese Academy of Geological sciences, {2. 10003. ,{3.

In the MORBnormalized multi element variation diagram given by Pearce(1983. ,the depletions of Ba relativeto Rb and Th are differentfor *** the case ofthe Eu anomaly ,the Ba anomaly can be defined and calculated . The Ba and Eu anomalies show close positive relationships with each other. The geochemicalsignificance ofthe Ba anomaly is discussed in this paper. Key words: Ba anomaly ; Eu anomaly; GeochemistryBarium Anomaly and Its GeochemicalSignificance WANYusheng Institute of Geology, chinese Academy of Geological sciences, {2. 10003. ,{3. Abstract In the MORBnormalized multi element variation diagram given by Pearce(1983. ,the depletions of Ba relativeto Rb and Th are differentfor *** the case ofthe Eu anomaly ,the Ba anomaly can be defined and calculated . The Ba and Eu anomalies show close positive relationships with each other. The geochemicalsignificance ofthe Ba anomaly is discussed in this paper.

关键词： Ba anomaly Eu anomaly Geochemistry

Fast and Robust Control of Excitation Systems: A Finite-time Method

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Journal of Systems Science and Systems Engineering 2001年第2期13卷 148-161页

作者： WANG Yu-zhen, CHENG Dai-zhan, HONG Yi-guang, QIN Hua-shuInstitute of Systems Science, Academy of Mathematics and System sciences,chinese Academy of sciences, {3. 100080, china Institute of Systems Science Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

Using finite-time control approach, this paper proposes a new design method for nonlinear robust excitation control of a widely used 5th-order model of synchronous generators. The finite-time excitation controller achieved here can improve the system′s behaviors in some aspects such as quick convergence and robustness for uncertainties. Simulations demonstrate that the finite-time excitation controller is more effective than some other excitation controllers.

关键词： finite-time control homogeneity excitation control robustness

A numerical study of the impact of SST anomaly in the warm pool area on atmospheric circulation in winter

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Acta Oceanologica Sinica 1992年第4期11卷 559-572页

作者： Dong Min, Chen Longxun and Liao Hong 1. chinese Academy of Meteorological Science, beijing 100081,{2.

In this paper the impacts of the anomalous SST in the warm pool area of the Western Equatorial Pacific on the winter time circulation and the East Asian monsoon are studied by using the NCAR CCM. It is found that the abnormal heating in the warm pool area will change the strength and the position of the Walker Cell in the Equatorial Pacific and the anti-Walker Cell in the equatorial Indian Ocean. Both the Walker and anti-Walker Cells are strengthened. The local Hadley Cells over two hemispheres near the warm pool are also strengthened. The subtropical highs in two hemispheres become stronger and move poleward slightly. The westerly jets in the extratropical regions have similar changes as the subtropical highs. The winter monsoon in South-East Asia is weakened by the abnormal heating in the warm pool. The experiment also show that there are wave trains emanating from surrounding areas of the warm pool to the high latitudes, causing various changes in circulations and local weather.

关键词： A numerical study of the impact of SST anomaly in the warm pool area on atmospheric circulation in winter area SST

Endothelial modulation of the alpha1 adrenoceptor autoantibody-induced arterial contraction in spontaneously hypertensive rats

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Endothelial modulation of the alpha1 adrenoceptor autoantibo...

Modeling Ecosystems of Tibetan Plateau under a Changing Environment:Issue,Challenge and Opportunity

中国生理学会第2.届全国会员代表大会暨生理学学术大会

作者： Zhong-Hua DAI~1,Li YAN~1,Guang-Zhao YANG~2.Su-Li ZHANG~2.Hui-Rong LIU~(2.3.,Ji-Min CAO ~1 1 Department of Physiology and Pathophysiology,Institute of Basic Medical {3.,chinese Academy of Medical {3.,School of Basic Medicine,Peking Union Medical College,beijing 100005,china 2.Department of Physiology,Shanxi Medical University, Taiyuan,china 3.Department of Pathophysiology,School of Basic Medical {3.,Capital Medical University,beijing,100069, china

Background:Growing evidence indicates that primary or secondary activation of immune mechanisms have been implicated in the pathogenesis of many forms of *** previous studies have demonstrated that the autoantibodies against the second extracellular loop ofα-adrenoceptor(α-AA) existed in the sera from patients with primary hypertension and possessed agonist-like vasoconstrictive *** study was designed to observe that whetherα-AA exhibited the similar vasocontractive characteristics on isolated thoracic artery rings from normotensive and hypertensive *** so,we further explore whether the endothelium and nitric oxide play the altered negative regulation onα-AA-induced contraction in hypertension and the possible ***: IgGs were purified from sera ofα-AA positive hypertensive patients and 2.α-AA negative normotensives respectively,and its purification,concentration and titer were detected by SDS-PAGE,BCA assay and ELISA, respectively;vascular reactivity experiments were performed in segments of thoracic aorta from normotensive Wistar Kyoto(WKY) rats and spontaneously hypertensive rats(SHR).The levels of protein nitration expressions in aorta were measured by ***:The contractile responses toα-AA(0.1-100 mmol/L) were greater in aortic segments from SHR than WKY(P3. mmol/L).Both the removal of endothelium and the non-selective NOS inhibitor, L-NAME(100μmol/L),further increased both phenylephrine andα-AA contraction in both the WKY and SHR segment(P0.05).In addition,nitrotyrosine formation was greater in aorta from SHR than that from WKY(P<0.05).Conclusion:The results indicated that reduced endothelium inhibition onα-AA-induced vasoconstriction and decreased bioavailability of NO,which co

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Modeling Ecosystems of Tibetan Plateau under a Changing Envi...

Simulation of Thermocapillary Convection in a TwoLayer Immiscible Fluid System Using a Boundary Element Method

第三世界生态高峰会

作者： Peng Changhui~(1,*) Ouyang Hua~2.Zhang Feng~2.Wu Haibin~1 1.Institiute of environment sciences,University of Quebec at Montreal Case postale 8888,succ Centre-Ville,Montréal(QC),Canada H3. 3.8 2.Institute of Geographic sciences & Natural Resources Research {2. Academy of sciences,PO Box 9717.beijing 100101,china

The Qinghai-Tibetan Plateau,characterized by high elevation,high irradiance,low atmospheric pressure,low temperature,unique location, and undisturbanced vegetation,is the highest plateau in the world, and has strong effects on chinese and East Asian climate system and regional *** terrestrial ecosystems of the Plateau are so diverse including subtropical,temperate and boreal forests,tundra, alpine,grassland,wetland and peatland and provide an ideal natural laboratory to investigate the potential impacts of global change on ecosystem structure and function,and their possible response to future global *** quantitatively examine the effects of global change on Plateau ecosystems,a number of models have been developed and tested over the past *** this paper,we are going to review the state of the art models,recent progress and their current applications to the Plateau regions in *** current issues,future challenges and collaboration opportunity will be also discussed.

关键词： Modeling Ecosystems of Tibetan Plateau under a Changing Environment:Issue,Challenge and Opportunity

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Journal of Thermal Science 1992年第4期1卷 259-266页

作者： Wen-Qiang Lu Department of Physics,graduate School,Academia Sinica,P.O.Box 3.08,beijing 10003.,{2. 1. Department of Physics Graduate School Academia Sinica P.O. Box 3908 100039 Beijing China

A boundary element method for simulating thermocapillary convection in a two-layer immiscible fluid system with flat and free interface has been *** divergence theorem is applied to the non-linear convective volume integral of the boundary element formulation with the pressure penalty ***,velocity gradients are eliminated and the complete formulation is written in terms of *** avoids the difficulty of convective discretizations and provides considerable reductions in storage and computational requirements while improving *** this paper,we give the influence of different parameters(Marangoni number, Reynolds number)on thermocapillary convection in cavity with two-layer immiscible *** shown by the numerical results,when the physical parameters between liquid encapsulant and melt are chosen appropriately, the detrimental flow in the bottom melt layer can be greatly *** influence of the free interface on thermocapillary convection is also shown.

关键词： boundary element computation of convective terms thermocapillary convection twolayer immiscible fluids in cavity flat and free interfaces

AR562.: THE OBSERVATIONS OF THE FLARE LOOP OF AUG.17,1989

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天文研究与技术 1990年第4期 185-343页

作者： Li Weibeijing Astronomical Observatory, chinese Academy of {2. beijing, 100080, china

Using the Solar Magnetic Field Telescope of Huairou Solar Station,we observed theflare loop occuring on the west limb of the sun on Aug.17,*** loops were causedby AR562.(S17,L74).At that time,this active region had al... 详细信息

关键词： Solar bright 神一

Earth system multi-body restriction dynamics model research

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Science china(Technological sciences) 2006年第z2期49卷 80-87页

作者： ZHANG Qingxian, BI Siwen& GONG Huili Key Laboratory of Three-Dimensional Information Acquisition and Application, Ministry of Education, Capital Normal University, beijing 10003., china National Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications of {2. Academy of {3., beijing 100101, china Capital Normal Univ Minist Educ Key Lab Dimens Informat Acquisit & Applicat 3 Beijing 100037 Peoples R China chinese Acad Sci Inst Remote Sensing Applicat Natl Key Lab Remote Sensing Sci Beijing 100101 Peoples R China

Research provides a theoretical basis for an Earth system multi-body mechanics model and its dynamics, including the Earth system multi-body restriction function and its power, Earth system multi-body restriction under decreasing generalized velocity and decreasing partial palstance, the Earth system multi-body decreasing generalized force, a moving mechanics function, and the Earth system multi-body restriction's wattful and wattless forces.

关键词： Earth system, multi-body restriction, dynamics model.

稀土离子(La^(3.),Ce^(3.),Tb^(3.),Y^(3.))对炎症及血小板聚集的影响

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中国稀土学报 2004年第6期22卷 828-831页

作者：李霞刘会雪刘湘陶天津职业大学生物与环境工程学院天津300402 北京大学药学院化学生物学系北京100083

研究稀土离子(La3.,Ce3.,Tb3.,Y3.)对炎症、血小板聚集及蛋白磷酸化的影响。采用二甲苯使小鼠耳部致炎,腹腔注射稀土离子,观察炎症的变化;利用血小板聚集仪观察稀土离子对血小板聚集的影响;用放射标记法测量稀土对血小板蛋白磷酸化程度... 详细信息

研究稀土离子(La3.,Ce3.,Tb3.,Y3.)对炎症、血小板聚集及蛋白磷酸化的影响。采用二甲苯使小鼠耳部致炎,腹腔注射稀土离子,观察炎症的变化;利用血小板聚集仪观察稀土离子对血小板聚集的影响;用放射标记法测量稀土对血小板蛋白磷酸化程度的影响。结果表明,稀土离子在2.5×10-4mol·L-1·kg-1的注射剂量下,能显著加强炎症反应;1×10-3.ol·L-1的轻稀土(La3.,Ce3.)对由ADP诱导的血小板聚集有明显的抑制作用,而重稀土(Tb3.,Y3.)有明显的促进作用;浓度在1×10-6～1×10-4mol·L-1时,轻、重稀土均可促进血小板蛋白磷酸化。稀土离子对炎症、血小板聚集及蛋白磷酸化的影响与稀土的种类和剂量有关。

关键词：血小板聚集炎症反应蛋白磷酸化影响观察致炎耳部稀土离子 La^3. ADP