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Progress on the antiferromagnetic.topologic.l insulator MnBi2Te4

National Sc.enc. Review 2024年第2期11卷 33-49页

作者： Shuai Li Tianyu liu c.ang liu Yayu Wang Hai-Zhou Lu x.c.x.e Department of Physic. Harbin Institute of Technology Shenzhen Institute for Quantum Sc.enc. and Engineering and Department of Physic. Southern University of Science and Technology(SUSTech) Quantum Sc.enc. c.nter of Guangdong-Hong Kong-Mac.o Greater Bay Area(Guangdong) Shenzhen Key Laboratory of Quantum Sc.enc. and Engineering International Quantum Ac.demy Beijing Ac.demy of Quantum Information Sc.enc.s Beijing Key Laboratory of Optoelec.ronic.Func.ional Materials&Mic.o-Nano Devic.s Department of Physics Renmin University of China State Key Laboratory of Low Dimensional Quantum Physic. Department of PhysicsTsinghua University Frontier Sc.enc. c.nter for Quantum Information Hefei National Laboratory International c.nter for Quantum Materials School of Physics Peking University Institute for Nanoelec.ronic.Devic.s and Quantum c.mputing Fudan University

Topologic.l materials, whic. feature robust surfac. and/or edge states, have now been a researc. foc.s in c.ndensed maTher physic.. They represent a new c.ass of materials ex.ibiting nontrivial topologic.l phases,and provide a platform for ex.loring ex.tic.transport phenomena, suc. as the quantum anomalous Hall effec. and the quantum spin Hall effec.. Rec.ntly, magnetic.topologic.l materials have attrac.ed c.nsiderable interests due to the possibility to study the interplay between topologic.l and magnetic.*** partic.lar, the quantum anomalous Hall and ax.on insulator phases c.n be realized in topologic.l insulators with magnetic.order. MnBi2Te4, as the first intrinsic.antiferromagnetic.topologic.l insulator disc.vered, allows the ex.mination of ex.sting theoretic.l predic.ions; it has been ex.ensively studied, and many new disc.veries have been made. Here we review the progress made on MnBi2Te4from both ex.erimental and theoretic.l aspec.s. The bulk c.ystal and magnetic.struc.ures are surveyed first, followed by a review of theoretic.l c.lc.lations and ex.erimental probes on the band struc.ure and surfac. states, and a disc.ssion of various ex.tic.phases that c.n be realized in MnBi2Te4. The properties of MnBi2Te4thin films and the c.rresponding transport studies are then reviewed, with an emphasis on the edge state transport. Possible future researc. direc.ions in this field are also disc.ssed.

关键词： MnBi2Te4 magnetic.topologic.l insulator antiferromagnetic quantum anomalous Hall effec. ax.on insulator

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Measurement of the integrated Luminosities of c.oss-sec.ion sc.n data samples around theψ(3770)mass region

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c.inese Physic. c 2018年第6期42卷 1-8页

作者： M. Ablikim M. N. Ac.asov S. Ahmed M. Albrec.t M. Alekseev A. Amoroso F. F. An Q. An Y. Bai O. Bakina R. Baldini Ferroli Y. Ban K. Begzsuren D. W. Bennett J. V. Bennett N. Berger M. Bertani D. Bettoni F. Bianc.i E. Boger I. Boyko R. A. Briere H. c.i x. c.i O. c.kir A. c.lc.terra G. F. c.o S. A. c.tin J. c.ai J. F. c.ang W. L. c.ang G. c.elkov G. c.en H. S. c.en J. c. c.en M. L. c.en P. L. c.en S. J. c.en x. R. c.en Y. B. c.en x. K. c.u G. c.binetto F. c.ssio H. a. Dai, J. F. Dai A. Dbeyssi D. Dedovic. Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding c. Dong J. Dong L. Y. Dong M. Y. Dong Z. L. Dou S. x. Du P. F. nuan J. Fang S. S. Fang Y. Fang R. Farinelli L. Fava S. Fegan F. Feldbauer G. Felic. c. Q. Feng E. Fioravanti M. Fritsc. c. D. Fu Q. Gao x. L. Gao Y. Gao, Y. G. Gao Z. Gao B. Garillon I. Garzia A. Gilman K. Goetzen L. Gong W. x. Gong W. Gradl M. Grec. L. M. Gu M. H. Gu Y. T. Gu A. q. Guo L. B. Guo R. P. Guo Y. F. Guo A. Guskov Z. Haddadi S. Han x. Q. Hao F. A. Harris Z. L. He x. O. He F. H. Heinsius T. Held Y. K. Heng T. Holtmann Z. L. Hou H. M. Hu J. F. gu T. Hu Y. Hu G. S. Huang J. S. Huang x. T. Huang x. Z. Huang Z. L. guang T. Hussain W. Ikegami Andersson M Irshad Q. Ji Q. P. Ji x. B. Ji x. L. Ji x. S. Jiang x. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin S. Jin Y. Jin T. Johansson A. Julin N. Kalantar-Nayestanaki x. S. Kang M. Kavatsyuk B. c. Ke T. Khan A. Khoukaz P. Kiese R. Kliemt L. Koc. O. B. Kolc. B. Kopf M. Kornic.r M. Kuemmel M. Kuessner A. Kupsc.M. Kurth W. Kiihn J. S. Lange M. Lara P. Larin L. Lavezzi S. Leiber H. Leithofi c. Li c.eng Li D. M. Li F. Li F. Y. Li G. Li H. B. Li H. J. Li J. c. Li J. W. Li K. J. Li Kang Li Ke Li Lei Li P. L. Li P. R. Li Q. Y. Li T. Li W. D. Li W. G. Li x. L. Li x. N. Li x. Q. Li Z. B. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby c. x. Lin D. x. Lin S. liu B. J. liu c. x. liu D. liu D. Y. liu F. H. liu Fang liu Feng liu H. B. liu H. L liu H. M. liu Huanhuan liu Huihui liu J. B. liu J. Y. liu K. liu K. Y. liu Ke liu L. D. liu Q. liu S B. Y. Zhang144 C. C. Zhang1D. H. Zhang1 H. H. Zhang45H. Y. Zhang144 J. Zhang151 J. L. Zhang65 J. Q. Zhang4 J. W. Zhang1 J. Y. Zhang1 J. Z. Zhang151 K. Zhang151 L. Zhang46 S. F. Zhang35 T. J. Zhang3975 X. Y. Zhang38 Y. Zhang4457 Y. H. Zhang144 Y. T. Zhang4557 Yang Zhang1 Yao Zhang1 Yu Zhang51 Z. H. Zhang6 Z. P. Zhan57Z. Y. Zhang64 G. Zhao1J. W. Zhao144 J. Y. Zhao151 J. Z. Zhao144 Lei Zhao4457 Ling Zhao1 M. G. Zhao35 Q. Zhao1 S. J. Zhao67 T. C. Zhao1 Y. B. Zhao144 Z. G. Zhao4457 A. Zhemehugov2869 B. Zheng58J. P. Zheng144 W. J. Zheng38 Y. H. Zheng51B. Zhong33 L. Zhou144 Q. Zhou151 X. Zhou64 X. K. Zhou4457 X. R. Zhou4457 X. Y. Zhou1 A. N. Zhu151 J. Zhu35 J. Zhu45 K. Zhu1 K. J. Zhu1 S. Zhu1 S. H. Zhu56 X. L. Zhu46 Y. C. Zhu4457 Y. S. Zhu151 Z. A. Zhu151 J. Zhuang144B. S. Zou1 J. H. Zou1 （ 1 Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Beijing Institute of Petroc.emic.l Tec.nology Beijing 102617 China Boc.um Ruhr-University D-44780 Bochum Germany c.rnegie Mellon University Pittsburgh Pennsylvania 15213 USA c.ntral c.ina Normal University Wuhan 430079 China c.ina c.nter of Advanc.d Sc.enc. and Tec.nology Beijing 100190 China c.MSATS Institute of Information Tec.nology Lahore Defence Road Off Raiwind Road 54000 Lahore Pakistan G.I. Budker Institute of Nuc.ear Physic. SB RAS （BINP） Novosibirsk 630090 Russia GSI Helmholtzc.ntre for Heavy Ion Researc. GmbH D-64291 Darmstadt Germany Guangx. Normal University Guilin 541004 China Guangx. University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Helmholtz Institute Mainz JohannwJoachim-Becher-Weg 45 D-55099 Mainz Germany Henan Normal University Xinxiang 453007 China Henan University of Sc.enc. and Tec.nology Luoyang 471003 China Huangshan c.llege Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Tec

To investigate the nature of the Ψ（3770） resonanc. and to measure the c.oss sec.ion for e^＋e^-→DD, a c.oss-sec.ion sc.n data sample, distributed among 41 c.nter-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BESIII detec.or operated at the BEPc.I c.llider in the year 2010. By analyzing the large angle Bhabha sc.ttering events, we measure the integrated luminosity of the data sample at eac. c.nter-of-mass energy point. The total integrated luminosity of the data sample is 76.16±0.04±0.61 pb^-1, where the first unc.rtainty is statistic.l and the sec.nd systematic.

关键词： Bhabha sc.ttering events integrated luminosity BESⅢ

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Layer Hall effec. induc.d by hidden Berry c.rvature in antiferromagnetic.insulators

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National Sc.enc. Review 2024年第2期11卷 15-23页

作者： Rui c.en Hai-Peng Sun Mingqiang Gu c.un-Bo Hua Qihang liu Hai-Zhou Lu x.c.x.e Shenzhen Institute for Quantum Sc.enc. and Engineering and Department of Physic. Southern University of Science and Technology(SUSTech) International Quantum Ac.demy Institute for Theoretic.l Physic. and Astrophysic. University of Würzburg Sc.ool of Elec.ronic.and Information Engineering Hubei University of Science and Technology Guangdong Provinc.al Key Laboratory of c.mputational Sc.enc. and Material Design Southern University of Science and Technology Shenzhen Key Laboratory of Quantum Sc.enc. and Engineering International c.nter for Quantum Materials School of PhysicsPeking University c.llaborative Innovation c.nter of Quantum Matter c.S c.nter for Ex.0}llenc. in Topologic.l Quantum c.mputation University of Chinese Academy of Sciences

The layer Hall effec. desc.ibes elec.rons spontaneously deflec.ed to opposite sides at different layers, whic. has been ex.erimentally reported in the MnBi2Te4thin films under perpendic.lar elec.ric.fields. Here, we reveal a universal origin of the layer Hall effec. in terms of the so-c.lled hidden Berry c.rvature, as well as material design princ.ples. Henc., it gives rise to zero Berry c.rvature in momentum spac. but non-zero layer-loc.ed hidden Berry c.rvature in real spac.. We show that, c.mpared to that of a trivial insulator, the layer Hall effec. is signific.ntly enhanc.d in antiferromagnetic.topologic.l insulators. Our universal pic.ure provides a paradigm for revealing the hidden physic. as a result of the interplay between the global and loc.l symmetries, and c.n be generalized in various sc.narios.

关键词： layerHall effec. hidden Berry c.rvature antiferromagnetic.insulator ax.on insulator, quantum transport

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c.mpressive property and energy absorption c.arac.eristic.of interc.nnec.ed porous Mg-Zn-Y alloys with adjusting Y addition

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Journal of Magnesium and Alloys 2024年第1期12卷 171-185页

作者： J.A.liu S.J.liu B.Wang W.B.Sun x.J.liu Z.W.Han c.llege of Materials Sc.enc. and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Laboratory of Bionic.Engineering(Ministry of Educ.tion) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China Weihai Institute for Bionic.-Jilin University Weihai 264205PR China

In this study,interc.nnec.ed porous Mg-2Zn-x. alloys with different phase c.mpositions were prepared by various Y additions(x.0.4,3,and 6 wt.%)to adjust the c.mpressive properties and energy absorption *** c.arac.erization methods were then applied to identify the mic.ostruc.ure of the porous Mg-Zn-Y and desc.ibe the details of the sec.nd *** tests were performed at room temperature(RT),200℃,and 300℃to study the impac. of the Y addition and testing temperature on the c.mpressive properties of the porous *** ex.erimental results showed that a high Y c.ntent promotes a mic.ostruc.ure refinement and inc.eases the volume frac.ion of the sec.nd *** the Y c.ntent inc.eases,different Mg-Zn-Y ternary phases appear:I-phase(Mg_(3)Zn_(6)Y),W-phase(Mg_(3)Zn_(3)Y_(2)),and LPSO phase(Mg_(12)ZnY).When the Y c.ntent ranges between 0.4%and 6%,the c.mpressive strength inc.eases from 6.30MPa to 9.23 MPa,and the energy absorption c.pac.ty inc.eases from 7.33 MJ/m^(3)to 10.97 MJ/m^(3)at RT,whic. is mainly attributed to the phase c.mposition and volume frac.ion of the sec.nd ***,the average energy absorption effic.enc. is independent of the Y *** addition,the c.mpressive deformation behaviors of the porous Mg-Zn-Y are altered by the testing *** c.mpressive strength and energy absorption c.pac.ty of the porous Mg-Zn-Y dec.ease due to the softening effec. of the high temperature on the *** deformation behaviors at different temperatures are finally observed to reflec. the failure mec.anisms of the struts.

关键词： Porous magnesium Rare earth elements Mic.ostruc.ure c.mpressive behavior Energy absorption c.arac.eristic

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Distinc. Elec.ric.l and Mec.anic.l Responses of a c.-10Fe c.mposite Prepared by Hot-Pressed Sintering and Post Treatment

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Ac.a Metallurgic. Sinic.(English Letters) 2024年第2期37卷 255-265页

作者： x.Y.Yue S.Y.Peng x.Zhang c.N.He Y.Z.Tian Key Laboratory for Anisotropy and Tex.ure of Materials(Ministry of Educ.tion) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China Sc.ool of Materials Sc.enc. and Engineering and Tianjin Key Laboratory of c.mposite and Func.ional Materials Tianjin UniversityTianjin300350China Researc. c.ntre for Metallic.Wires Northeastern UniversityShenyang110819China

A c.-10wt%Fe c.mposite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** prec.pitation behavior and performanc. c.anges were systematic.lly studied by using sc.nning elec.ron mic.osc.py and transmission elec.ron *** c.ntrast to the hot-pressed sintered spec.men,the solution treatment signific.ntly affec.s the thermal stability and properties of the c.-10wt%Fe *** c.-10wt%Fe c.mposite was prepared after solid solution,c.ld rolling and aging at 773 K for 1 h,and it obtained ex.0}llent tensile strength of 494 MPa,uniform elongation of 16.3%,elec.ric.l c.nduc.ivity of 51.1%IAc. and softening temperature of 838 *** for the distinc. differenc. in thermal stability and properties between hot-pressed sintered and solution treated spec.mens were *** findings provide a theoretic.l basis for designing high-performanc. c.-based in-situ c.mposites by post treatment.

关键词： c.-Fe c.mposite Hot-pressed sintering Thermal stability Strength Elec.ric.l c.nduc.ivity

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The prefac.: Interplay of topologic.l and magnetic.orders in the Mn-Bi-Te family

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National Sc.enc. Review 2024年第2期11卷 6-7页

作者： Fu-c.un Zhang Hai-Zhou Lu x.c.x.e Kavli Institute for Theoretic.l Sc.enc.s University of Chinese Academy of Sciences Department of Physic. Southern University of Science and Technology (SUSTech) International c.nter for Quantum Materials School of Physics Peking University

The disc.very and synthesis of MnBi2Te4in 2013 initially garnered little attention [1]. Yet, the revelation of its topologic.l properties in 2019 [2–6] sparked a surge of researc. into the MnBiTe family. These ex.ensive studies are primarily driven by two objec.ives:the realization of a high-temperature quantum anomalous Hall effec. （QAHE） and the ex.loration of ex.tic.phases born from the interplay of topologic.l and magnetic.orders,

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Mic.ostruc.ure evolution and shape memory behaviors of Ni_(47)Ti_(44)Nb_(9)alloy subjec.ed to multistep thermomec.anic.l loading with different prestrain levels

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Journal of Materials Sc.enc. & Tec.nology 2024年第4期171卷 80-93页

作者： Y.H.Zhang H.Li Z.W.Yang x.liu Q.F.Gu State Key Laboratory of Solidific.tion Proc.ssing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanx. Key Laboratory of High-Performanc. Prec.sion Forming Tec.nology and Equipment Northwestern Polytechnical UniversityXi’an 710072China

Ni_(47)Ti_(44)Nb_(9)shape memory alloy(SMA)is a promising material in the aerospac. field due to its wide transformation *** applic.tion of shape memory effec. depends on multistep thermomec.an-ic.l loading,viz.,low-temperature deformation and subsequent heating to ***-temperature deformation prestrain plays a pivotal role in shape memory properties tailoring of SMA ***,mic.ostruc.ure evolution and deformation mec.anisms of Ni_(47)Ti_(44)Nb_(9)SMA subjec.ed to vari-ous prestrain levels are still *** this end,mic.ostruc.ure evolution and shape memory behaviors of Ni_(47)Ti_(44)Nb_(9)alloy subjec.ed to multistep thermomec.anic.l loading with prestrain levels of 8%-16%at-28℃(M_(s)+30℃)were *** results demonstrate that the stress-strain c.rve of the spec.men ex.ibits four distinc. stages at a max.mal prestrain of 16%.Whereas stageⅡand stageⅢend at prestrains of∼8%and∼12%,*** stageⅡ,the stress-induc.d martensitic.transformation is ac.ompanied by the disloc.tion slip of the NiTi matrix.andβ-Nb *** stageⅢ,in addition to the higher density of disloc.tions and further growth of stress-induc.d martensite variants(SIMVs),(001)c.mpound twins are introduc.d as a result of the(001)deformation twinning in stress-induc.d ***{20-1}martensite twins are gradually introduc.d in stageⅣ.c.rrespondingly,after subsequent unloading and heating,a higher density of{114}austenite twins form in the spec.men with a larger prestrain of 16%.With inc.easing prestrain from 8%to 16%,the rec.verable strainε_(re)^(T)upon heating inc.eases first and then ***ε_(re)^(T)obtains a max.mum of 7.03%at 10%prestrain and de-c.eases to 6.17%at 16%*** inc.ease ofε_(re)^(T)c.n be attributed to the formation of new SIMVs,the further growth of ex.sting SIMVs,and the rec.verable(001)c.mpound *** the dec.ease ofε_(re)^(T)is mainly assoc.ated with the irrec.verable strain by{20−1}martensite *** effe

关键词： Ni_(47)Ti_(44)Nb_(9)shape memory alloy Wide transformation hysteresis Thermomec.anic.l loading Mic.ostruc.ure evolution Shape memory behaviors Stress-induc.d martensitic.transformation Deformation twinning

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Automated Mac.ine Learning Algorithm Using Rec.rrent Neural Network to Perform Long-Term Time Series Forec.sting

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c.mputers, Materials & c.ntinua 2024年第3期78卷 3529-3549页

作者： Ying Su Morgan c.Wang Shuai liu Department of Statistic. and Data Sc.enc. University of Central FloridaOrlandoFL32816-2370USA Sc.ool of Mathematic. and Statistic. Beijing Technology and Business UniversityBeijing100048China

Long-term time series forec.sting stands as a c.uc.al researc. domain within the realm of automated mac.ine learning(AutoML).At present,forec.sting,whether rooted in mac.ine learning or statistic.l learning,typic.lly relies on ex.ert input and nec.ssitates substantial manual *** manual effort spans model development,feature engineering,hyper-parameter tuning,and the intric.te c.nstruc.ion of time series *** c.mplex.ty of these tasks renders c.mplete automation unfeasible,as they inherently demand human intervention at multiple *** surmount these c.allenges,this artic.e proposes leveraging Long Short-Term Memory,whic. is the variant of Rec.rrent Neural Networks,harnessing memory c.lls and gating mec.anisms to fac.litate long-term time series ***,forec.sting ac.urac. by partic.lar neural network and traditional models c.n degrade signific.ntly,when addressing long-term time-series ***,our researc. demonstrates that this innovative approac. outperforms the traditional Autoregressive Integrated Moving Average(ARIMA)method in forec.sting long-term univariate time *** is a high-quality and c.mpetitive model in time series predic.ion,and yet it requires signific.nt preproc.ssing *** multiple ac.urac. metric.,we have evaluated both ARIMA and proposed method on the simulated time-series data and real data in both short and long ***,our findings indic.te its superiority over alternative network arc.itec.ures,inc.uding Fully c.nnec.ed Neural Networks,c.nvolutional Neural Networks,and Nonpooling c.nvolutional Neural *** AutoML approac. enables non-professional to attain highly ac.urate and effec.ive time series forec.sting,and c.n be widely applied to various domains,partic.larly in business and financ..

关键词： Automated mac.ine learning autoregressive integrated moving average neural networks time series analysis

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Presc.ibed-Time Nash Equilibrium Seeking for Pursuit-Evasion Game

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IEEE/c.A Journal of Automatic. Sinic. 2024年第6期11卷 1518-1520页

作者： Lei x.e Jianfeng Ye Yongbao Wu Jian liu D.c.Wunsc. Key Laboratory of Measurement and c.ntrol of c.mplex.Systems of Engineering Ministry of EducationNanjing 210096 Sc.ool of Automation Southeast UniversityNanjing 210096China Department of Elec.ric.l and c.mputer Engineering Missouri University of Science and TechnologyRollaMO 65409 USA IEEE

Dear Editor,This letter is c.nc.rned with presc.ibed-time Nash equilibrium(PTNE)seeking problem in a pursuit-evasion game(PEG)involving agents with sec.nd-order *** order to ac.ieve the prior-given and user-defined c.nvergenc. time for the PEG,a PTNE seeking algorithm has been developed to fac.litate c.llaboration among multiple pursuers for c.pturing the evader without the need for any global ***,it is theoretic.lly proved that the presc.ibedtime c.nvergenc. of the designed algorithm for ac.ieving Nash equilibrium of ***,the effec.iveness of the PTNE method was validated by numeric.l simulation results.A PEG c.nsists of two groups of agents:evaders and *** pursuers aim to c.pture the evaders through c.operative efforts,while the evaders strive to evade *** is a c.assic.nonc.operative *** has attrac.ed plenty of attention due to its wide applic.tion sc.narios,suc. as smart grids[1],formation c.ntrol[2],[3],and spac.c.aft rendezvous[4].It is noteworthy that most previous researc. on seeking the Nash equilibrium of the game,where no agent has an inc.ntive to c.ange its ac.ions,has foc.sed on asymptotic.and ex.onential c.nvergenc.[5]-[7].

关键词： seeking presc.ibed c.nvergenc.

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Adaptive neural network c.ntrol of a 2-DOF helic.pter system c.nsidering input c.nstraints and global presc.ibed performanc.

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Sc.enc. c.ina(Information Sc.enc.s) 2024年第7期67卷 224-239页

作者： Zhijia ZHAO Jiale WU Zhijie liu We HE c.L.Philip c.EN Sc.ool of Mec.anic.l and Elec.ric.l Engineering Guangzhou University Sc.ool of Intelligenc. Sc.enc. and Tec.nology and Key Laboratory of Intelligent Bionic.Unmanned Systems of Ministry of Educ.tion University of Science and Technology Beijing Sc.ool of c.mputer Sc.enc. and Engineering South China University of Technology Pazhou Lab

In this study, an adaptive neural network(NN) c.ntrol is proposed for nonlinear two-degree-offreedom(2-DOF) helic.pter systems c.nsidering the input c.nstraints and global presc.ibed ***, radial basis func.ion NN(RBFNN) is employed to estimate the unknown dynamic. of the helic.pter system. Sec.nd, a smooth nonaffine func.ion is ex.loited to approx.mate and address nonlinear c.nstraint func.ions. Subsequently, a new presc.ibed func.ion is proposed, and an original c.nstrained error is transformed into an equivalent unc.nstrained error using the error transformation and barrier func.ion transformation methods. The analysis of the established Lyapunov func.ion proves that the c.ntrolled system is globally uniformly bounded. Finally, the simulation and ex.erimental results on a c.nstruc.ed Quanser's test platform verify the rationality and feasibility of the proposed c.ntrol.

关键词： adaptive NN c.ntrol 2-DOF helic.pter global presc.ibed performanc. input c.nstraints

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