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Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone

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Science China Earth Sciences 2005年第7期48卷 886-899页

作者： LIN Wei1, 2, Faure Michel3, WANG Qingchen1 & Arnaud Nicolas4.1. LTE, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Department of Earth and Planetary Sciences, Graduate School of Science, Nagoya University, Japan 3. ISTO, umr CNRS 6113, Batiment Géosciences, Orléans Université d’Orléans, 4.067 Orléans Cedex 2, France 4. umr 6524."Magmas et Volcans", 5 Rue Kessler, 63000 Clermont-Ferrand, France LTE Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Department of Earth and Planetary Sciences Graduate School of Science Nagoya University Japan ISTO UMR CNRS 6113 Orléans Université d'Orléans 45067 Orléans Cedex 2 France umr 6524.Magmas et Volcans 63000 Clermont-Ferrand 5 Rue Kessler France

The Beihuaiyang metamorphic zone was formed by the Early Mesozoic collision of the North and South China Blocks. It consisted of the Foziling and Luzhenguan complexes and was thought to have never afforded a deep subduction. A similar feature of the deformation in the Dabieshan UHP metamorphic rocks implies that these different tectonic units share the same geodynamic background. The early stage of deformation can be preserved on account of their relatively shallower subduction than that for UHP rocks. On the basis of an analysis of the geo- logical structure and geochronological results, five deformational stages have been recognized: a D1-Early compressional deformation which represents the continental subduction; a D2-Early exhumation deformation producing a syn-convergence exhumation; a D3-Main deformation, represented by an exhumation deformation with Late Triassic age; a D4.Doming and its margin extensional gravity collapse deformation and finally a D5-regional extensional deformation of Cretaceous that was mostly introduced by the migmatization and plutonism.

关键词： Beihuaiyang metamorphic zone geometry kinematic polyphase deformation tectonic evolution.

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Land Management Effects on Biogeochemical Functioning of Salt-Affected Paddy Soils

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Pedosphere 2008年第2期18卷 183-194页

作者： C.QUANTIN umr 814. IDES O.GRUNBERGER N.SUVANNANG E.BOURDON Université Paris-Sud-CNRS Land Department Developement Office of Science for Land Developement Phaholyothin RoadChatuchak UR Solutions Maison des Sciences de l'Eau de Montpellier IRDav.E.Gendreau

Most lowlands in Northeast Thailand(Isaan region)are cultivated with rice and large areas are affected by salinity, which drastically limits rice production.A field experiment was conducted during the 2003 rainy season to explore the interactions between salinity and land management in two fields representative of two farming practices:an intensively managed plot with organic inputs and efficient water management,and one without organic matter *** measurements,including pH,Eh,electrical conductivity(EC),and soil solution chemistry,were performed at three depths, with a particular focus on Fe dynamics,inside and outside saline patches. High reducing conditions appeared after flooding particularly in plots receiving organic matter and reduction processes leading to oxide reduction and to the release of Fe and,to a lesser extend,Mn to the soil *** reduction led to the consumption of H^+ and the more the Fe reduction was,the higher the pH was,up to *** of hydroxy-green rust were likely to be at the origin of the pH *** the absence of organic amendments,high salinity prevented the establishment of the reduction processes and pH value remained around *** under high reduction conditions,the Fe concentrations in the soil solution were below commonly observed toxic values and the amended plot had better rice production yield.

关键词： field experiment pH regulation redox processes salt-affected paddy soils soil management

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Recognition of Gene Acceptor Site Based on Multi-objective Optimization

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Acta Biochimica et Biophysica Sinica 2005年第7期37卷 435-439页

作者： Jing ZHAO~(1,3,4. Yue-Min ZHU~2 Pei-Ming SONG~1 Qing FANG~1 Jian-Hua LUO~(1,3) 1 School of Life Science & Technology,Shanghai Jiaotong University,Shanghai 20024.,China 2 CREATIS,CNRS umr 5515,INSA Lyon,69621 Villeurbanne Cedex,France 3 Shanghai Center for Bioinformation and Technology,Shanghai 200235,China 4.Logistical Engineering University,Chongqing 4.0016,China SchoolofLifeScience&Technology ShanghaiJiaotongUniversityShanghai200240China

A new method for predicting the gene acceptor site based on multi-objective optimization isintroduced in this *** models for the acceptor,branch and distance between acceptor site andbranch site were constructed according to the characteristics of the sequences from the exon-intron databaseand using common biological *** acceptor function,branch function and distance functionwere defined respectively,and the multi-objective optimization model was constructed to recognize thesplice *** test results show that the algorithm used in this study performs better than the SplicePredictor,which is one of the leading acceptor site detectors.

关键词： multi-objective optimization acceptor site recognition

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Numerical Study of the Plastic Behaviour of a Low Alloy Steel during Phase Transformation

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Journal of Shanghai Jiaotong university(Science) 2000年第1期5卷 206-212页

作者： J.Devaux, J.B. Leblond , J.M. Bergheau 1.SYSTUS International, 84.Bvd Vivier Merle, 694.5 Lyon Cedex 03, France 2.LMM, umr 7607 CNRS/Universite Paris 6, 4.Place Jussieu, Tour 66, 75252 Paris Cedex 05, France 3.LTDS, umr5513 CNRS/ECLIENISE, 58, rue 1.

Phase transformations in steels play a major role on the generation of residual stresses and distortions during thermal processes such as welding and heat treatments. In this paper, we focus on the influence of phase transformations on the plastic behaviour of a low-alloy steel. It is now well known that the plastic strain rate can then be decomposed as the sum of two terms. The first one corresponds to classical plasticity while the second one is due to the evolution of the transformation and is usually referred to as corresponding to transformation induced plasticity. A theoretical approach of the problem has been achieved ([1][2][3]] and a macroscopic model has been proposed in the case of ideal-plastic phases. The theoretical approach has been assessed and completed using micromechanical numerical simulations but these were based on rather coarse 3D meshes due to limited computer capabilities in the 80’s. This paper presents new finite element micromechanical calculations using refined meshes to analyse the classical plastic behaviour and transformation induced plasticity. The results of the computations are discussed and compared with the calculations initially performed. Finally improvements of the macroscopic model are proposed.

关键词： Phase transformation steel elastic-plastic behaviour modelling transformation plasticity Finite Element simulation.

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Computer simulation of thermochemical treatments: modelling diffusion and precipitation in metals

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Journal of Shanghai Jiaotong university(Science) 2000年第1期5卷 303-309页

作者： R. Fortunier, J.B. Leblond, J.M Bergheau 1.ENSM-SE, centre SMS, 158 yours Fauriel, 4.023 - St-Etienne cedex 02, France 2.LMM, umr 7607/CNRS/Universite Paris VI, Tour 66, case 162, 4.place Jussieu, 75252 Paris cedex 05, France 3.LTDS, umr 5513, CNRS/ECL

A model for simultaneous diffusion and precipitation in metals has been recently incorporated into a finite element computer code [1][2]. This model allows now for numerical simulations of various thermochemical treatments such as nitriding or carburizing. Subsequent quenching simulations are then made more accurate, by introducing the influence of the carbon content on the thermo-metallurgical and mechanical properties of the materials [3]. After recalling the mathematical equations used to model simultaneous diffusion and precipitation and their implementation into a finite element code, this paper deals with the method used to obtain the local fractions of precipitates as functions of the local content in each chemical element. The law of mass action is employed to calculate the fractions of precipitates obtained at thermodynamic equilibrium. This leads to a nonlinear complementarity problem. The method used to solve this problem is described in detail, and is validated by computing the phase diagram of a micro-alloyed steel. Finally, numerical simulations of combined diffusion and precipitation in steels point out the efficiency of the approach presented, as well as the important role played by precipitation during diffusion in metals.

关键词： Thermochemical treatment diffusion precipitation finite element method

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Mesenchymal Stem Cells Inhibit Dendritic Cell Maturation and Their Allosti mulatory Capacity

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生物医学工程学杂志 2005年第S1期22卷 29-30页

作者： Sophie PACZESNY Veronique LATGER CANNARD Luc MARCHAL Bernard FOLLIGUET Jean-Franéois STOLTZ Assia ELJAAFARI Hematology Department Children Hospital Nancy 54511 FranceHematology Laboratory CHU Nancy 54511 FranceResearch Group of Cell and Tissue Engineering LEMTA - CNRS UMR 7563 Faculté de Médecine de Nancy CHU Nancy 54511 FranceDepartment of electron microscopy Faculté de Médecine Nancy 54511 FranceResearch Group of Cell and Tissue Engineering LEMTA - CNRS UMR 7563 Faculté de Médecine de Nancy CHU Nancy 54511 FranceResearch Group of Cell and Tissue Engineering LEMTA - CNRS UMR 7563 Faculté de Médecine de Nancy CHU Nancy 54511 France

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Growth and Characteristics of Nd^(3+):GdAl_3(BO_3)_4.Crystal

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Chinese Journal of Structural Chemistry 2003年第2期22卷 169-173页

作者： TU Chao-Yang② ZHU Zhao-Jie LI Jian-Fu WU Bai-Chang (Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China) BRENIER Alain (Laboratoire de Physico-Chimie des Mat閞iaux Luminescents, Universit?Claude Bernard-Lyon1,umr CNRS 5620, France) Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

Nd3+:GdAl3(BO3)4.(NGAB) crystal with the size of 30 mm was grown from the solvent system of K2O-Gd2O3-MoO3-B2O3 by combining accelerated seed rotation technology with medium seeded solution growth (MSSG) method, and its crystal structure has been determined by X-ray powder diffraction. It crystallizes in the trigonal system, space group R32 with a = 9.2734.2), c = 7.24.8(1) ? V = 538 ?, Z = 3 and Dc = 4.379 g/cm3. The absorption and emission spectra of NGAB in the function of s and polarizations at room temperature have been measured. UV generation tuneable in 378～382 nm, green (531 nm) generation and blue generation tuneable in 4.6～4.3 nm as well as red (669 nm) generation by self-frequency changing were obtained with the output of 105, 119.5, 4.5 and 19 mJ/pulse, respectively, when the crystal was pumped by a dye laser.

关键词： flux crystal growth Nd3+:GdAl3(BO3)4.crystal self-frequency changing laser

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Metabolites from mangrove endophytic fungus Dothiorella sp.

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Acta Oceanologica Sinica 2004年第3期23卷 541-547页

作者： XUQingyan WANGJianfeng HUANGYaojian ZHENGZhonghui SONGSiyang ZHANGYongmin SUWenjin SchoolofLifeScience XiamenUniversityXiamen361005China DepartmentofChemistry XiamenUniversityXiamen361005China EcoleNormaleSupérieure DépartementdeChimieUMR8642CNRS24RueLhomond75231ParisCedex05France

Mangroves are special woody plant communities in the intertidal zone of tropical and subtropical coasts. They prove to be a natural microorganisms and new metabolites storage. In the study of mangrove endophytic fungi metabolites, four new compounds, Compounds 1, 2, 3 and 4. as well as a known octaketide, oytosporone B (5), are isolated from an endophytic fungus, Dothiorella sp., HTF3. They all show cytotoxic activities. The elucidation of these structures is mainly based on 1D/ 2D NMR and ESI-MS spectral analyses.

关键词： Dothiorella sp. mangrove endophytic fungus dothiorelones cytosporone B

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Reconstruction of climate and vegetation changes of Lake Bayanchagan(Inner Mongolia):Holocene variability of the East Asian monsoon

Reconstruction of climate and vegetation changes of Lake Bay...

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中国科学院地质与地球物理研究所2006学术年会

作者： Chritine Hatte Arbois,1354. Aix-en-Provence cedex 4.France Laboratoire des Sciences du Climat et de l'Environnement UMR 1572 CEA/CNRS.F-91198 Gif sur Yvette CedexFrance CEREGE umr 6635 CNRS BP 80Europo^le Me'diterrane'en de l

A high-resolution pollen and Pediastrum record,spanning 12,500 yr,is presented for Lake Bayanchagan(115.21E,4..65N,and 1355 m a.s.l.),southern Inner *** pollen taxa(PT-MAT) and the PFT affinity scores(PFT-MAT) were used for quantitative climatic reconstruction from pollen and algal *** techniques indicate that a cold and dry climate, similar to that of today,prevailed before 10,500 cal yr *** wettest climate occurred between 10,500 and 6500 cal yr B.P.,at which time annual precipitation was up to 30-60% higher than *** early Holocene increases in temperature and precipitation occurred simultaneously,but mid-Holocene cooling started at approximately 8000 cal yr B.P.,1500 yr earlier than the *** reconstruction was based on the objective assignment of pollen taxa to the plant functional *** results suggest that this region was dominated by steppe vegetation throughout the Holocene,except for the period 9200 to 6700 cal yr B.P.,when forest patches were relatively *** Mongolia is situated at the limit of the present East Asian monsoon and patterns of vegetation and climate changes in that region during the Holocene probably reflect fluctuations in the monsoon’s response to solar insolation *** early to middle Holocene monsoon undoubtedly extended to more northern latitudes than at present.D 2005 University of *** rights reserved.

关键词： Pollen data Paleoclimate Vegetation East Asian monsoon Holocene

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A Numerical Model for Multiple Phase Transformations in Steels during Thermal Processes

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Journal of Shanghai Jiaotong university(Science) 2000年第1期5卷 213-220页

作者： R. Fortunier, J.B. Leblond, J.M Bergheau 1.ENSM-SE, centre SMS, 158 cours Fauriel, 4.023 - St-Etienne cedex 02, France 2.LMM, umr 7607/CNRS/Université Paris VI, Tour 66, case 162, 4.place Jussieu, 75252 Paris cedex 05, France 3.LTDS, UMIR 5513, CNRS/E

It is now well known that phase changes in steels can be reasonably well modelled by kinetics derived from the concept of extended volume. This has led to a large number of models based on the Koistinen-Marburger equation for martensitic type transformations, and on Johnson-Mehl-Avraxni-Kolmogorov type equations for transformations involving diffusion. These models are generally based on either isothermal transformation (IT) diagrams or on continuous cooling transformation (CCT) diagrams. Their efficiency is often linked to their ability to represent both CCT and IT diagrams of a given material. After describing classical models used to simulate phase changes in steels along isothermal as well as non-isothermal paths, this paper focuses on (i) the numerical implementation of these models, and (ii) their generalisation to the case where more than two phases are involved. We first show that, in the case of only one possible reaction between two phases, most of the kinetic models can be incorporated into a unique differential formulation. This formulation holds for both martensitic and diffusjonal transformations. For the case where several reactions between two or more phases can take place, an approach assuming that these reactions occur independently is proposed. This approach is illustrated on (i) calculations of CCT diagrams from data obtained on IT diagrams, and (ii) prediction of IT diagrams from parameters fitted on CCT diagrams.

关键词： Phase transformation modelling heat treatment heat transfer steels

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