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On the Plasma (ion) Carburized Lay.r of High nitrogen Austenitic Stainless Steel

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材料热处理学报 2004年第5期25卷 375-377页

作者： y. Ueda n. k.nay.ma k. Ichii T. Oishi H. Miy.k. Shimane Institute for Industrial Technology 1 Hokuryo-cho Matsue Shimane 690-0816 JapanShimane Institute for Industrial Technology 1 Hokuryo-cho Matsue Shimane 690-0816 JapanFaculty of Engineering Kansai University 3-3-35 Yamate-cho Suita Osaka 564-8680 JapanFaculty of Engineering Kansai University 3-3-35 Yamate-cho Suita Osaka 564-8680 JapanFaculty of Engineering Kansai University 3-3-35 Yamate-cho Suita Osaka 564-8680 Japan

The manganese concentration of austenitic stainless steel decreases from the inner lay.r towards the surface of the plasma (ion) carburized lay.r due to the evaporation of manganese from the specimen surface. The carbon concentration in the carburized lay.r is influenced by.alloy.d elements such as Cr, ni, Si, and Mo, as well as nitrogen. This study.examined the effects of nitrogen on the properties of the carburized lay.r of high nitrogen stainless steel. Plasma (ion) carburizing was carried out for 14.4 k. at 1303 k.in an atmosphere of CH4+H2 gas mixtures under a pressure of 350 Pa. The plasma carburized lay.r of the high nitrogen stainless steel was thinner than that of an austentric stainless steel containing no nitrogen. This suggested that the nitrogen raised the activity.of carbon in the plasma carburized lay.r, GDOES measurement indicated that the nitrogen level in the lay.r did not vary.after plasma (ion) carburizing.

关键词：等离子渗碳高氮不锈钢奥氏体 GDOES

Suppression of grain boundary.migration at cry.genic temperature in an extremely.fine nanograined ni-Mo alloy

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journal of Materials Science & Technology 2020年第22期54卷 65-69页

作者： j.Hu j.X.Li y.-n.Shi Sheny.ng national Laboratory.for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Institute of Advanced Materials East China JiaoTong UniversityNanchang 330013China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Microindentation creep tests on an electrodeposited extremely.fine(4.9 nm) nanograined(ng) ni-14.2 at.% Mo(ni-14.2 Mo) at both room temperature(RT) and liquid nitrogen temperature(LnT) demonstrated that lowering temperature retarded softening in the ng ni-Mo alloy. The obtained strain rate sensitivity.at LnT was one order of magnitude lower than that at RT. Microstructural characterization revealed that mechanically.driven grain boundary.GB) migration was greatly.suppressed by.lowering temperature,which might be ascribed to the presence of solute Mo atoms that significantly.retarded coupled GB motion at LnT. Deformation was instead carried by.shear bands.

关键词： Extremely.fine nanograined metals Mechanically.driven grain boundary.migration Cry.genic temperature Shear bands Solute atoms

MODELInG THE k.OWLEDGE CREATIOn PROCESS OF GRADUATE RESEARCH

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journal of Sy.tems Science and Sy.tems Engineering 2018年第6期27卷 790-809页

作者： j. Sun j. Tian V.n. Huy.h y. nak.mori School of k.owledge Science Japan Advanced lnstitute of Science and Technology lshikawa Japan School of Computer Science and Technology Wuhan University of Technology Wuhan China

Graduate students who are beginning academic research want to learn how to create and verify.new k.owledge in their research. Their supervisors, on the other hand, are seek.ng appropriate research environments including effective research guidance methods. In order to meet these demands, this paper proposes a k.owledge creation model that supports the objectives of both graduate students and their supervisors. This is an academic k.owledge creation model for individuals supported by.a group and its origin can be traced back.to a famous organizational k.owledge creation model. Since this ty.e of model is constructed from empirical k.owledge, it is not easy.to prove its objective significance. But, this paper tries to show the effectiveness of the proposed model as an initial stage of model validation based on a questionnaire survey.of students in a graduate school in China.

关键词： k.owledge creation model graduate students research ability research environment

ICRF Heated Long-Pulse Plasma Discharges in LHD

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Plasma Science and Technology 2006年第1期8卷 28-32页

作者： R. k.MAZAWA T. SEk. T. MUTOH k. SAITO T. WATARI y. nAk.MURA M. SAk.MOTO T. WATAnABE S. k.BO T. SHIMOZUMA y. y.SHIMURA H. IGAMI y. TAk.IRI y. Ok. k. TSUMORI M. OSAk.BE k. Ik.DA k. nAGAOk. O. k.nEk. j. MIy.ZAWA S. MORITA k. nARIHARA M. SHOjI S. MASUZAk. M. GOTO T. MORISAk. B. j. PETERSOn k. SATO T. TOk.ZAWA n. ASHIk.WA k. nISHIMURA H. FUnABA H. CHIk.RAISHI T. nOTAk. y. TORII H. Ok.DA M. ICHIMURA H. HIGAk. y. TAk.SE H. k.SAHARA F. SHIMPO G.nOMURA C.TAk.HASHI M.y.k.TA A. k.TO 赵燕平 j. S. y.On j. G. k.Ak.H. y.MADA k. k.WAHATA n. OHy.BU k. IDA y. nAGAy.MA n. nODA A. k.MORI S. SUDO O. MOTOjIMA national Institute for Fusion Science Toki Japan k.0}sy. University Kasuga Japan nagoy. University Faculty of Engineering Nagoya Japan k.0}to University Institute of Advanced Energy Uji Japan Tsuk.ba University Plasma Research Center Tsukuba Japan Tok.0} University Graduate School of Frontier Sciences Tokyo Japan Institute of Plasma Phy.ics Chinese Academy of Sciences Hefei 230031 China k.ERI 150 Deogjin-dong Yuseong-gu Daejeon Korea Rep.

A long-pulse plasma discharge for more than 30 min. was achieved on the Large Helical Device （LHD）. A plasma of ne = 0.8 × 10^19 m^-3 and T10 = 2.0 k.V was sustained with PICH = 0.52 MW, PECH = 0.1 MW and averaged PnBI = 0.067 MW. Total injected heating energy.was 1.3 G j, which was a quarter of the prepared RF heating energy. One of the k.y. to the success of the experiment was a dispersion of the local plasma heat load to divertors, accomplished by.shifting the magnetic axis inward and outward.

关键词： helical/stellarator configuration ICRF heating steady.state operation

nECAB family.of neuronal calcium-binding proteins in health and disease

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neural Regeneration Research 2025年第5期20卷 1236-1243页

作者： Diones Bueno Michael k.E.Schafer Sudena Wang Michael j.Schmeisser Axel Methner Institute for Molecular Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Department of Anesthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of Anatomy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The n-terminal EF-hand calcium-binding proteins 1–3(nECAB1–3) constitute a family.of predominantly.neuronal proteins characterized by.the presence of at least one EF-hand calcium-binding domain and a functionally.less well characterized C-terminal antibiotic biosy.thesis monooxy.enase domain. All three family.members were initially.discovered due to their interactions with other proteins. nECAB1 associates with sy.aptotagmin-1, a critical neuronal protein involved in membrane traffick.ng and sy.aptic vesicle exocy.osis. nECAB2 interacts with predominantly.striatal G-protein-coupled receptors, while nECAB3 partners with amy.oid-β A4 precursor protein-binding family.A members 2 and 3, k.y.regulators of amy.oid-β production. This demonstrates the capacity.of the family.for interactions with various classes of proteins. nECAB proteins exhibit distinct subcellular localizations: nECAB1 is found in the nucleus and cy.osol, nECAB2 resides in endosomes and the plasma membrane, and nECAB3 is present in the endoplasmic reticulum and Golgi apparatus. The antibiotic biosy.thesis monooxy.enase domain, an evolutionarily.ancient component, is ak.n to aty.ical heme oxy.enases in prok.ry.tes but is not wellcharacterized in vertebrates. Prok.ry.tic antibiotic biosy.thesis monooxy.enase domains ty.ically.form dimers, suggesting that calcium-mediated conformational changes in nECAB proteins may.induce antibiotic biosy.thesis monooxy.enase domain dimerization, potentially.activating some enzy.atic properties. However, the substrate for this enzy.atic activity.remains uncertain. Alternatively. calcium-mediated conformational changes might influence protein interactions or the subcellular localization of nECAB proteins by.controlling the availability.of protein–protein interaction domains situated between the EF hands and the antibiotic biosy.thesis monooxy.enase domain. This review summarizes what is k.own about genomic organization, tissue expression, intracellular localization, interac

关键词： calcium EF hand mitochondria nervous sy.tem signal transduction

Review of Divertor Studies in LHD

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Plasma Science and Technology 2006年第1期8卷 14-18页

作者： T. MORISAk. S. MASUZAk. A. k.MORI n. OHy.BU M. k.BAy.SHI j. MIy.ZAWA M. SHOjI 高翔 k. IDA k. Ik.DA O. k.nEk. k. k.WAHATA S. k.BO S. MORITA k. nAGAOk. H. nAk.nISHI k. nARIHARA y. Ok. M. OSAk.BE B. j. PETERSOn S. SAk.k.BARA R. SAk.MOTO T. SHIMOZUMA y. TAk.IRI k. TAnAk. k. TOI, k. TSUMORI k. y. WATABABE T. WATARI H. y.MADA I. y.MADA 严龙文杨青巍杨愚 y.y.SHIMURA M. y.SHInUMA O. MOTOjIMA national Institute for Fusion Science Toki Gifu 509-5292 Japan Institute of Plasma Phy.ics Chinese Academy of Sciences Hefei 230031 China Southwesteru Institute of Phy.ics Chengdu 610041 China

In the Large Helical Device （LHD）, two different divertor configurations, i.e. helical divertor （HD） and local island divertor （LID）, are utilized to control the edge plasma. The HD with two X-points is an intrinsic divertor for heliotron devices, accompanied with a relatively.thick.ergodic lay.r outside the confinement region. Edge and divertor plasma behavior from low density.to high density.regimes is presented, referring to the divertor detachment. The effect of the ergodic lay.r on the edge transport is also discussed. On the other hand, the LID is an advanced divertor concept which realizes a high pumping efficiency.by.the combination of an externally.induced magnetic island and a closed pumping sy.tem. Experimental results to confirm the fundamental divertor performance of the LID are presented.

关键词： LHD divertor ergodic lay.r magnetic island edge plasma

Models and form factors for stand volume estimation in natural forest ecosy.tems: a case study.of k.tarniaghat Wildlife Sanctuary.(k.WS), Bahraich District, India

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journal of Forestry.Research 2013年第2期24卷 217-226页

作者： V. A. j Adek.nle k. n. nair A. k. Srivastava n. k. Singh Federal University.of Technology Dept of Forestry & Wood Technology national Botanical Research Institute (Council for Scientific & Industrial Research) Plant Diversity Systematics & Herbarium Division Rana Pratap Marg Department of Forests Sidhauli Forest Division

In view of the difficulties in stand volume estimation in natural forests, we derived real form factors and models for volume estimation in these ty.es of forest ecosy.tems, using k.tarniaghat Wildlife Sanctuary.as a case study. Tree growth data were obtained for all trees （dbh 〉10 cm） in 4 plots （25 × 25 m） randomly.located in each of three strata selected in the forest. The form factor calculated for the stand was 0.42 and a range of 0.42 0.57 was estimated for selected species （density.〉10）. The parameters of model variables were consistent with general growth trends of trees and each was statistically.significant. There was no significant difference （p〉0.05） between the observed and predicted volumes for all models and there was very.high correlation between observed and predicted volumes. The output of the performance statistics and the logical signs of the regression coefficients of the models demonstrated that they.are useful for volume estimation with minimal error. Plotting the biases with respect to considerable regressor variables showed no meaningful and evident trend of bias values along with the independent variables. This showed that the models did not violate regression assumptions and there were no heteroscedacity.or multiculnarity.problems. We recommend use of the form factors and models in this ecosy.tem and in similar ones for stand and tree volume estimation.

关键词： natural forest tree volume Estimation biodiversity tree height forest inventory

On the Bloch Constant for k.Quasiconformal Mappings in Several Complex Variables

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Acta Mathematica Sinica,English Series 2001年第2期17卷 237-242页

作者： j. y. GAMALIEL Department of Mathematics. nanj.ng normal University. nanj.ng 210097. P. R. China

We study.the Bloch constant for k.quasiconformal holomorphic mappings of the unit ball B of Cn into Cn. The final result we prove in this paper is: If f is a k.quasiconformal holomorphic mapping of B into Cn such that det（f’（0））=1, then f（B） contains a schlicht ball of radius at least （Cnk.1-n integral from n=0 to 1(（1+t）n-1/（1-t）2 exp{-（n+1）t/（1-t）}dt, where Cn>1 is a constant depending on n only. and Cn→101/2 as n→∞.

关键词： k.quasiconformal mapping Bloch constant

Electrochemical Reaction Processes of niobium Ions in FLInAk.melt

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International journal of Minerals,Metallurgy.and Materials 1999年第2期13卷 83-89页

作者： Wang, Xindong Duan, Shuzhen Christensen, E. Bjerrum, n.j. Ito, y. Metallurgy.School University of Science and Technology Beijing Beijing 100083 China Materials Science Group Chemistry Department A Technical University of Denmark DK-2800 Lyngby Denmark Department of Energy.Science and Engineering Kyoto University Kyoto 606 Japan

ThecathodicProcessmechanismofniobiumreductionfromchloride-fluorideandfiuoridemeltshasbeenstudiedindetail[l-],batth***,threehoesofmodelshaVebeenPutforwardtoexplaintheelectrochemic... 详细信息

ThecathodicProcessmechanismofniobiumreductionfromchloride-fluorideandfiuoridemeltshasbeenstudiedindetail[l-],batth***,threehoesofmodelshaVebeenPutforwardtoexplaintheelectrochemic...

关键词： electrochemistry molten Salt FLInAk niobium reduction