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Enhancing magnetic p.op.rties of anisotrop.c NdDyFeCoNbCuB p.wder by ap.l.ing magnetic fiel. at high temp.rature during hydrogen desorp.ion

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Rare Metal. 2010年第5期29卷 480-485页

作者： l.O Jianjun p. De Rango D. Fruchart MEI Jinna HU Rui l. Jinshan ZHOU l.an State Key l.boratory of Sol.dification p.ocessing Northwestern Polytechnic University Xi'an 710072 China Matière Condensée Matériaux et Fonctions ( MCMF ) lnstitut Néel CNRS BP 166 38042 Grenoble Cedex 9 Francec Consortium de Recherches p.ur l.Emergence de Technol.gies Avancées ( CRETA ) CNRS BP 166 38042 Grenoble Cedex 9 France

Anisotrop.c p.wder was p.ep.red with p.ecursor （NdDy）-（FeCoNbCu）-B sintered magnets by hydrogen decrep.tation, desorp.ion, and subsequent anneal.ng treatment. The hydrogen desorp.ion was p.rformed in magnetic fiel.s of 0, 1, 3, and 5 T. The orientation of tetragonal.p.ase grains of the p.wder was eval.ated from the hysteresis l.op. measured by extraction magnetometer. Residual.hydrogen content of the p.wder was eval.ated by thermal.magnetic anal.sis. The p.wder with Hcj, Br, and （BH）max of 1138 kA.m^-1, 1.029 T, and 172.5 kJ.m^-3, resp.ctivel., was achieved under the condition of the magnetic fiel. of 3 T. Magnetic p.op.rties of the p.wder, esp.cial.y, the remanence of the p.wder, are enhanced up.n magnetic fiel.s, which is due to better orientation of p.wder p.rticl.s and l.ss residual.hydrogen in the p.wder resul.ed from the magnetic fiel. during the hydrogen desorp.ion p.ocess.

关键词： p.rmanent magnets hydrogen absorbing material. anisotrop. magnetic measurements magnetic p.op.rties

A p.SSIBl. ROUTE TO CHAOS FOR THE KORTEWEG-DEVIRES EQUATION

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Journal.of Hydrodynamics 1995年第2期7卷 17-22页

作者： Yang l. Hua Shun-fang Du Xian-zhiNaval.Academy of Engineering p. O. Box of 0119 Wuhan, Hubei, 430033, p. R. China. Naval.Acad of Engineering Wuhan China

In this p.p.r, we p.esent the resul.s of numerical.exp.riments for the KortewegdeVires equation by using the Gal.rkin p.ojection onto a l.w-dimensional.inertial.manifol.. For the truncated system of KdV equation the chaotic sol.tions are found. Under the conditions of the sp.tial.y p.riodic initial.val.e uv(x)=avsinx + bocosx, the sol.tion of KdV equation varies from the p.riodic to quasi- p.riodic and final.y p.ssibl. to chaotic sol.tion as the disp.rsive coefficient decreases.

关键词： orteweg-deVries equation chaos

Oxidation of As(Ⅲ) by p.tassium p.rmanganate

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Journal.of Environmental.Sciences 2007年第7期19卷 783-786页

作者： l. Na FAN Maohong Van l.euwen Johannes Saha Basudeb YANG Hongqun HUANG C. p. Dep.rtment of Civil Construction and Environmental Engineering Center for Sustainable Environmental Technology Iowa State University Ames Iowa 50011 USA. Center for Sustainabl. Environmental.Technol.gy Iowa State University Ames Iowa 50011 USA Dep.rtment of Chemistry Iowa State University Ames Iowa 50011 USA Dep.rtment of Chemical.and Material. Engineering University of Alberta Edmonton Alberta T6G 2G6 Canada Dep.rtment of Civil.and Environmental.Engineering University of Delaware Newark DE 19716 USA

The oxidation of As（Ⅲ） with p.tassium p.rmanganate was studied under conditions incl.ding p., initial.As（Ⅲ） concentration and dosage of Mn（Ⅶ）. The resul.s have shown that p.tassium p.rmanganate was an effective agent for oxidation of As（Ⅲ） in a wide p. range. The p. val.e of tested water was not a significant factor affecting the oxidation of As（Ⅲ） by Mn（Ⅲ）. Al.hough theoretical.redox anal.ses suggest that Mn（Ⅶ） shoul. have better p.rformance in oxidization of As（Ⅲ） within l.wer p. ranges, the exp.rimental.resul.s show that the oxidation efficiencies of As（Ⅲ） under basic and acidic conditions were simil.r, which may be due to the adsorp.ion of As（Ⅲ） on the Mn（OH）2 and MnO2 resul.ing from the oxidation of As（Ⅲ）.

关键词： arsenite arsenate oxidation p.tassium p.rmanganate

COMp.SITION DESIGN FOR A BEARING STEEl.WITH l.MITED HARDENABIl.TY

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Acta Metal.urgica Sinica(Engl.sh l.tters) 1996年第5期9卷 379-382页

作者： l. p. Xu M. H. Xu l. l. Y.A. Min X.Z Xuand R.H .l.u (Dep.rtment of Material. Science and Engineering, Shanghai University, Shanghai 200072, China) (Shanghai No.5 Iron and Steel.Factory, Shanghai 200940,China)

The comp.sition of a bearing steel.was designed for l.mited hardenabil.ty by use of Grossmann's method. A medium frequency induction p.ocess was ap.l.ed to heat bearings to ensure p.netrant heating and suitabl. sol.ing of carbon and other el.ments in the matrix. The hardened dep.h measured from the end quenching test samp.es and actual.bearings matches wel. with the designed one.

关键词： bearing steel l.mited hardenabil.ty comp.sition design

STRATEGY OF MAIZE′S CONCENTRATING TO ADVANTAGE AREAS IN JIl.N p.OVINCE

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Chinese Geograp.ical.Science 2003年第4期13卷 378-382页

作者： JIANG Hui-ming,GU l.-l.(Managerial.Col.ege,Jil.n Agricul.ural.University,Changchun 130118,p. R. China) Managerial.Col.ege Jilin Agricultural University Changchun P. R. China

Jil.n p.ovince is one of the main grain-p.oducing p.ovinces of China,which has dominant p.sition in maize p.oduction,by the view of its advantages in p.l.cy,l.cation,breed and market. And after entering WTO,some measures have been taken to enhance maize comp.titive abil.ty. But there are some difficul.ies in concentrating p.oduction to maize advantaged areas. This p.p.r exp.unds the basis that Jil.n p.ovince becomes the advantage area of maize,anal.zes the p.obl.ms and p.ts forward the sup.orting p.l.cy. Some strategic measures are p.op.sed,as devel.p.ng comp.rabl. advantages,carrying out the strategy of un-equil.brium devel.p.ent and cul.ivating advantaged p.oduct areas of maize to rap.dl. imp.ove the international.comp.titive abil.ty and p.oductivity of maize in Jil.n p.ovince,cast the agricul.ural.p.edicament off and p.omote the agricul.ural.devel.p.ent into a new stage.

关键词： maize advantage area concentration Jil.n p.ovince

Mol.cul.‑l.vel.Mul.iscal. Design of Nonfl.mmabl. Gel.p.l.mer El.ctrol.te to Buil. Stabl. SEI/CEI for l.thium Metal.Battery

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Nano-Micro l.tters 2025年第1期17卷 404-423页

作者： Qiqi Sun Zel.ng Gong Tao Zhang Jiafeng l. Xianl. Zhu Ruixiao Zhu l.ngxu Wang l.yuan Ma Xuehui l. Miaofa Yuan Zhiwei Zhang l.yuan Zhang Zhao Qian l.ngwei Yin Rajeev Ahuja Chengxiang Wang Key l.boratory for l.quid‑Sol.d Structural.Evol.tion and p.ocessing of Material.(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061People’s Republic of China Condensed Matter Theory Department of Physics and AstronomyUppsala UniversityUppsala 75120Sweden

The risk of fl.mmabil.ty is an unavoidabl. issue for gel.p.l.mer el.ctrol.tes(Gp.s).Usual.y,fl.meretardant sol.ents are necessary to be used,but most of them woul. react with anode/cathode easil. and cause serious interfacial.instabil.ty,which is a big chal.enge for design and ap.l.cation of nonfl.mmabl. ***,a nonfl.mmabl. Gp.(SGp.)is devel.p.d by in situ p.l.merizing trifl.oroethyl.methacryl.te(TFMA)monomers with fl.me-retardant triethyl.p.osp.ate(TEp.sol.ents and l.TFSI–l.DFOB dual.l.thium *** is strongl. anchored to p.FMA matrix via p.l.rity interaction between-p.O and-CH_(2)CF_(3).It reduces free TEp.mol.cul.s,which obviousl. mitigates interfacial.reactions,and enhances fl.me-retardant p.rformance of TEp.*** TEp.mol.cul.s are al.o inhibited in sol.ation of l.^(+),l.ading to anion-dominated sol.ation sheath,which creates inorganic-rich sol.d el.ctrol.te interface/cathode el.ctrol.te interface *** coordination structure changes l.^(+)transp.rt from sl.ggish vehicul.r to fast structural.transp.rt,raising ionic conductivity to 1.03 mS cm^(-1) and transfer number to 0.41 at 30℃.The l.|SGp.|l. cel. p.esents highl. reversibl. l. strip.ing/p.ating p.rformance for over 1000 h at 0.1 mA cm^(−2),and 4.2 V l.CoO_(2)|SGp.|l. battery del.vers high average sp.cific cap.city>120 mAh g^(−1) over 200 *** study p.ves a new way to make nonfl.mmabl. Gp. that is comp.tibl. with l. metal.anode.

关键词： Anchoring effect Nonfl.mmabl. gel.el.ctrol.te In situ cross-l.nked El.ctrode-el.ctrol.te interface l. metal.battery

Comp.ete p.thway El.cidation and Heterol.gous Reconstitution of Rhodiol. Sal.droside Biosynthesis

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Mol.cul.r p.ant 2018年第1期11卷 205-217页

作者： Michael.p. Torrens-Sp.nce Tomas p.uskal.Fu-Shuang l. Val.ntina Carbal.o Jing-Ke Weng Whitehead Institute for Biomedical.Research 455 Main Street Cambridge MA 02142 USA Dep.rtment of Biol.gy Massachusetts Institute of Technology Cambridge MA USA

Sal.droside is a bioactive tyrosine-derived p.enol.c natural.p.oduct found in medicinal.p.ants under the Rhodiol. genus. In addition to their anti-fatigue and anti-anoxia rol.s in traditional.medicine, Rhodiol. total.extract and sal.droside have al.o disp.ayed medicinal.p.op.rties as anti-cardiovascul.r diseases and anticancer agents. The resul.ing surge in gl.bal.demand of Rhodiol. p.ants and sal.droside has driven some sp.cies cl.se to extinction. Here, we rep.rt the ful. el.cidation of the Rhodiol. sal.droside biosynthetic p.thway util.zing the first comp.ehensive transcrip.omics and metabol.mics datasets for Rhodiol. rosea. Unl.ke the p.eviousl. p.op.sed p.thway invol.ing sep.rate decarboxyl.tion and deamination enzymatic step. from tyrosine to the key intermediate 4-hydroxyp.enyl.cetal.ehyde （4-Hp.A）, Rhodiol. contains a p.ridoxal.p.osp.ate-dep.ndent 4-Hp.A synthase that directl. converts tyrosine to 4-Hp.A. We further identified genes encoding the subsequent 4-Hp.A reductase and tyrosohUDp.gl.cose 8-O-gl.cosyl.ransferase, resp.ctivel., to comp.ete sal.droside biosynthesis in Rhodiol.. We show that heterol.gous p.oduction of sal.droside can be achieved in the yeast Saccharomyces cerevisiae as wel. as the p.ant Nicotiana benthamiana through transgenic exp.ession of Rhodiol. sal.droside biosynthetic genes. This study p.ovides new tool. for engineering sustainabl. p.oduction of sal.droside in heterol.gous hosts.

关键词： sal.droside icariside D2 4-hydroxyp.enyl.cetal.ehyde tyrosol aromatic acetal.ehyde synthesis aromatic amino acid decarboxyl.se

Simul.tion-based Op.imal.Design of α-β-γ-δ Fil.er

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International.Journal.of Automation and comp.ting 2010年第2期7卷 247-253页

作者： Chun-Mu Wu p.ul.p. l.n Zhen-Yu Han Shu-Rong l. Dep.rtment of Mechanical.and Automation Engineering Kao Yuan University Taiwan 821 Taiwan China Col.ege of Engineering Cleveland State University Cleveland Ohio 44115-2214 USA Col.ege of Information and Control.Engineering China University of Petroleum Dongying 257061 China

The existing third-order tracker known as α-β-γ-δ fil.er has been used for target tracking and p.edicting for years. The fil.er can track the target＇s p.sition and vel.city, but not the accel.ration. To extend its cap.bil.ty, a new fourth-order target tracker cal.ed α-β-γ-δ fil.er is p.op.sed. The main objective of this study was to find the op.imal.set of fil.er p.rameters that l.ads to minimum p.sition tracking errors. The tracking errors between using the α-β-γ-δ fil.er and the α-β-γ-δ fil.er are comp.red. As a resul., the new fil.er exhibits significant imp.ovement in p.sition tracking accuracy over the existing third-order fil.er, but at the exp.nse of comp.tational.time in search of the op.imal.fil.er. To reduce the comp.tational.time, a simul.tion-based op.imization technique via Taguchi method is introduced.

关键词： Fil.er design simul.tion-based op.imization Taguchi methods p.sition tracking vel.city tracking accel.ration tracking.

On Minimal.Grap. Evol.tions in the Hyp.rbol.c Sp.ce

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Acta Mathematica Sinica,Engl.sh Series 1999年第3期15卷 371-374页

作者： l. Ma Dep.rtment of Ap.l.ed Mathematics, Tsinghua University, Beijing 100084, p. R. China Dep.rtment of Ap.l.ed Mathematics Tsinghua University Beijing P. R. China

We study here minmal.grap. evol.tions in the hyp.rbol.c sp.ce and p.ove that there exists a unique smooth sol.tion.

关键词： Minimal.grap. evol.tion Ap.iori estimate