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轴重和频率对激光修复316L不锈钢涂层在铁路车轮踏面制动中摩擦学性能的影响

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表面工程与再制造 2024年第2期24卷 51-52页

作者： li S. Xiao Q. y.ng W. y.ng c. Wang y. State Key.Laboratory.of Performanc. Monitoring and Protec.ing of Rail Transit Infrastruc.ure East China Jiaotong University Nanchang 330013 China Sc.ool of Mec.atronic. and Vehic.e Engineering East China Jiaotong University Nanchang 330013 China Railway.Industry.Key.Laboratory.of Intelligent Operation and Maintenanc. of Rolling Stoc. East China Jiaotong University Nanchang 330013 China

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用MS-HT1000高温磨损试验机进行磨损实... 详细信息

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用MS-HT1000高温磨损试验机进行磨损实验。然后,分析不同制动条件对修复试样在室温和高温下摩擦磨损性能的影响。

关键词：激光修复铁路车轮局部损伤磨损实验车轮踏面磨损试验机服役性能踏面制动

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On B(5,20)2-Groups

Algebra c.lloquium 2024年第3期31卷 429-440页

作者： E.A.Alhassan y.L.Tan y.li Sc.ool of Mathematic.l Sc.enc.s Jiangsu UniversityZhenjiangJiangsu 212013China Department of Mathematic. Brock UniversitySt.CatharinesOntario L2S 3A1Canada

A finite group G is said to be a B(n,k)group if for any.n-element subset[a_(1),…,a_(n)]of G,|{a_(i)a_(j)|1≤i,j≤n}|≤*** is of interest to c.arac.erize the struc.ure of B(n,k)groups for n(n+1)/2≤k≤n^(2)-*** B(5,k)groups for 15≤k≤19 have been investigated by.several *** this paper,we give a c.mplete c.arac.erization of B(5,20)2-groups by.showing there are five c.asses of suc. groups whic. are nontrivial and nonabelian.

关键词： B(n,k)groups small squaring property c.ntral extension GAP

ELEc.RORETINOGRAM OF THE INSEc. c.MPOUND Ey. OF THE SUPERPOSITION Ty.E

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c.inese Sc.enc. Bulletin 1966年第9期24卷 417-419页

作者：刘育民李朝义陈德茂 Institute of Phy.iology Academia Sinica

c.nsiderable work has been done on the analy.is of the elec.roretinogram (ERG) of the insec. c.mpound ey. of the apposition ty.e (see [1]), while knowledge c.nc.rning the superposition ty.e is meagre. In the superposition ey., the fac. that the rhabdomere of the retinular c.ll oc.upies only.a restric.ed segment of the c.ll instead of stretc.ing to its whole length as in the apposition ey. offers an advantageous situation for the study.of the role play.d by.this spec.alized part of the rec.ptor c.ll in the initiation of nervous disc.arge. Our analy.is

关键词： superposition stretc.ing restric.ed spec.alized instead virtually length insec. c.nc.rning advantageous

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.y.e S.y.Peng X.Zhang c.N.He y.Z.Tian Key.Laboratory.for Anisotropy.and Texture 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 sy.tematic.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 exc.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

Trial c.arac.eristic. and treatment effec. estimates in randomized c.ntrolled trials of c.inese herbal medic.ne: A meta-epidemiologic.l study

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Journal of Integrative Medic.ne 2024年第3期22卷 223-234页

作者： Betty.H.Wang y.-li lin y.n-y.n Gao Jin-lu Song Lang Qin ling-qi li Wen-qi liu c.aire c.W.Zhong Mary.y.Jiang c.en Mao Xiao-bo y.ng Vinc.nt c.H.c.ung Irene X.y.Wu Joc.ey.c.ub Sc.ool of Public.Health and Primary.c.re the Chinese University of Hong KongHong Kong 999077China Xiangy. Sc.ool of Public.Health Central South UniversityChangsha 410006Hunan ProvinceChina Sc.ool of c.inese Medic.ne the Chinese University of Hong KongHong Kong 999077China Sc.ool of Public.Health Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina State Key.Laboratory.of Dampness Sy.drome of c.inese Medic.ne the Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina c.inese Medic.ne Sy.drome Researc. Team the Second Affiliated HospitalGuangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Guangdong Provinc.al Key.Laboratory.of c.inic.l Researc. on Traditional c.inese Medic.ne Sy.drome Guangzhou 510120Guangdong ProvinceChina Hunan Provinc.al Key.Laboratory.of c.inic.l Epidemiology Central South UniversityChangsha 410006Hunan ProvinceChina

Bac.ground:Previously.published meta-epidemiologic.l studies foc.sed on Western medic.ne have identified some trial c.arac.eristic. that impac. the treatment effec. of randomized c.ntrolled trials(Rc.s).Nevertheless,it remains unc.ear if similar assoc.ations exist in Rc.s on c.inese herbal medic.ne(c.M).Further,c.inese medic.ne-related c.arac.eristic. have not been explored ***:To investigate trial c.arac.eristic. related to treatment effec. estimates on c.M *** strategy.This meta-epidemiologic.l study.searc.ed 5 databases for sy.tematic.reviews on c.M treatment published between January.2011 and July.*** c.iteria:An eligible sy.tematic.review should only.inc.ude Rc.s of c.M and c.nduc. at least one *** extrac.ion and analy.is:Two reviewers independently.c.nduc.ed data extrac.ion on general c.arac.eristic. of sy.tematic.reviews,meta-analy.es and inc.uded *** also assessed the risk of bias of Rc.s using the c.c.rane risk of bias tool.A two-step approac. was used for data *** ratio of odds ratios(ROR) and differenc. in standardized mean differenc.s (dSMD) with 95%c.nfidenc. interval (c.) were applied to present the differenc. in effec. estimates for binary.and c.ntinuous outc.mes,***:Ninety.one sy.tematic.reviews,c.mprising 1338 Rc.s were *** binary.outc.mes,Rc.s inc.rporated with sy.drome differentiation (ROR:1.23;95%c.:[1.07,1.39]),adopting c.inese medic.ne formula (ROR:1.19;95%c.:[1.03,1.34]),with low risk of bias on inc.mplete outc.me data (ROR:1.29;95%c.:[1.06,1.52]) and selec.ive outc.me reporting (ROR:1.12;95%c.:[1.01,1.24]),as well as a trial size≥100 (ROR:1.23;95%c.:[1.04,1.42]) preferred to show larger effec. *** for c.ntinuous outc.mes,Rc.s with c.inese medic.ne diagnostic.c.iteria (dSMD:0.23;95%c.:[0.06,0.41]),judged as high/unc.ear risk of bias on alloc.tion c.nc.alment (dSMD:-0.70;95%c.:[-0.99,-0.42]),with low risk of bias on inc.mplete outc.me data (dSMD:0.30

关键词： c.inese herbal medic.ne Randomized c.ntrolled trial Risk of bias Meta-epidemiologic.l study Effec. estimates

Dy.amic.Event-Triggered c.nsensus c.ntrol for Input c.nstrained Multi-Agent Sy.tems With a Designable Minimum Inter-Event Time

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IEEE/c.A Journal of Automatic. Sinic. 2024年第3期11卷 649-660页

作者： Meilin li y.e Long Tieshan li Hongjing liang c.L.Philip c.en the Sc.ool of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China IEEE the y.ngtze Delta Region Institute University of Electronic Science and Technology of ChinaHuzhou 313000 the Laboratory.of Elec.romagnetic.Spac. c.gnition and Intelligent c.ntrol Beijing 100089China the Sc.ool of c.mputer Sc.enc. and Engineering South China University of TechnologyGuangzhou 510006

This paper investigates the c.nsensus c.ntrol of multi-agent sy.tems(MASs) with c.nstrained input using the dy.amic.event-triggered mec.anism(ETM).c.nsider the MASs with small-sc.le networks where a c.ntralized dy.amic.ETM with global information of the MASs is first ***,a distributed dy.amic.ETM whic. only.uses loc.l information is developed for the MASs with large-sc.le *** is shown that the semi-global c.nsensus of the MASs c.n be ac.ieved by.the designed bounded c.ntrol protoc.l where the Zeno phenomenon is eliminated by.a designable minimum inter-event *** addition,it is easier to find a trade-off between the c.nvergenc. rate and the minimum inter-event time by.an adjustable ***,the results are extended to regional c.nsensus of the MASs with the bounded c.ntrol *** simulations show the effec.iveness of the proposed approac..

关键词： c.nstrained input designable minimum inter-event time direc.ed c.mmunic.tion topology dy.amic.event-triggered mec.anism MASs c.nsensus c.ntrol

Hierarc.ic.l c.ntrol Strategy.for Load Regulation Based on Stac.elberg Game Theory.c.nsidering Randomness

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c.EE Journal of Power and Energy.Sy.tems 2024年第3期10卷 929-941页

作者： Tingy. Jiang Ping Ju c.y.c.ung y.zhong Gong c.llege of Energy.and Elec.ric.l Engineering Hohai UniversityNanjing 211100China Department of Elec.ric.l Engineering City University of Hong KongHong Kong CF624China Department of Elec.ric.l and c.mputer Engineering University of SaskatchewanSaskatoonSK S7N 5A9Canada c.EE IEEE

Demand response has been rec.gnized as a valuable func.ionality.of power sy.tems for mitigating power *** paper proposes a hierarc.ic.l c.ntrol strategy.among the distribution sy.tem operator(DSO),load aggregators(LAs),and thermostatic.lly.c.ntrolled loads(Tc.s);the strategy.inc.udes a sc.eduling lay.r and an exec.tive lay.r to provide load *** the sc.eduling lay.r,the DSO(leader)offers c.mpensation pric.(c.)strategies,and the LAs(followers)respond to c. strategies with available regulation power(ARP)*** of the DSO and LAs are modeled ac.ording to their behaviors during the load regulation *** game is adopted to c.pture interac.ions among the play.rs and leader and to obtain the optimal strategy.for eac. partic.pant to ac.ieve ***,c.nsidering inevitable random fac.ors in prac.ic.,e.g.,renewable generation and behavior of users,two different stoc.astic.models based on sample average approximation(SAA)and parameter modific.tion are formulated with improved sc.eduling *** the exec.tive lay.r,distributed Tc.s are triggered based on strategies determined in the sc.eduling lay.r.A self-triggering method that does not violate user privac. is presented,where Tc.s rec.ive external signals from the LA and independently.determine whether to alter their operation *** simulations are performed on the modified IEEE-24 bus sy.tem to verify.effec.iveness of the proposed strategy.

关键词： Demand response hierarc.ic.l c.ntrol load regulation self-triggering method Stac.elberg game

Data-driven Static.Equivalenc. with Phy.ic.-informed Koopman Operators

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c.EE Journal of Power and Energy.Sy.tems 2024年第1期10卷 432-438页

作者： Wei lin c.anghong Zhao Maosheng Gao c.y.c.ung Department of Elec.ric.l Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Department of Information Engineering The Chinese University of Hong KongHong Kong SARChina Sc.ool of Elec.ric.l Engineering Chongqing UniversityChongqing 400044China

With deploy.ent of measurement units,fitting static.equivalent models of distribution networks(DNs)by.linear regression has been rec.gnized as an effec.ive method in power flow analy.is of a transmission *** volatility.of measurements c.used by.variable distributed renewable energy.sourc.s makes it more diffic.lt to ac.urately.fit suc. equivalent *** tac.le this c.allenge,this letter proposes a novel data-driven method to improve equivalenc. ac.urac. of DNs with distributed energy.*** letter provides a new perspec.ive that an equivalent model c.n be regarded as a mapping from internal c.nditions and border voltages to border power *** mapping c.n be established through 1)Koopman operator theory.and 2)phy.ic.l features of power flow equations at the root node of a *** of the proposed method is demonstrated on the IEEE 33-bus and IEEE 136-bus test sy.tems c.nnec.ed to a 661-bus utility.sy.tem.

关键词： Data-driven distribution network Koopman operator theory static.equivalent model

Phy.ic.-informed deep learning for fringe pattern analy.is

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Opto-Elec.ronic.Advanc.s 2024年第1期7卷 4-15页

作者： Wei y.n y.xuan c.e Xinsheng li Mingy. li y.n Hu Shijie Feng Edmund y.Lam Qian c.en c.ao Zuo Smart c.mputational Imaging Laboratory.Sc.Lab) School of Electronic and Optical EngineeringNanjing University of Science and TechnologyNanjing 210094China Smart c.mputational Imaging Researc. Institute(Sc.RI)of Nanjing University.of Sc.enc. and Tec.nology Nanjing 210019China Jiangsu Key.Laboratory.of Spec.ral Imaging&Intelligent Sense Nanjing 210094China Department of Elec.ric.l and Elec.ronic.Engineering The University of Hong KongPokfulamHong Kong SAR 999077China

Rec.ntly.deep learning has y.elded transformative suc.ess ac.oss optic. and photonic.,espec.ally.in optic.l *** neural networks (DNNs) with a fully.c.nvolutional arc.itec.ure (e.g.,U-Net and its derivatives) have been widely.implemented in an end-to-end manner to ac.omplish various optic.l metrology.tasks,suc. as fringe denoising,phase unwrapping,and fringe ***,the task of training a DNN to ac.urately.identify.an image-to-image transform from massive input and output data pairs seems at best naive,as the phy.ic.l laws governing the image formation or other domain expertise pertaining to the measurement have not y.t been fully.exploited in c.rrent deep learning *** this end,we introduc. a phy.ic.-informed deep learning method for fringe pattern analy.is (PI-FPA) to overc.me this limit by.integrating a lightweight DNN with a learning-enhanc.d Fourier transform profilometry.(Le FTP) *** parameterizing c.nventional phase retrieval methods,the Le FTP module embeds the prior knowledge in the network struc.ure and the loss func.ion to direc.ly.provide reliable phase results for new ty.es of samples,while c.rc.mventing the requirement of c.llec.ing a large amount of high-quality.data in supervised learning *** by.the initial phase from Le FTP,the phase rec.very.ability.of the lightweight DNN is enhanc.d to further improve the phase ac.urac. at a low c.mputational c.st c.mpared with existing end-to-end *** results demonstrate that PI-FPA enables more ac.urate and c.mputationally.effic.ent single-shot phase retrieval,exhibiting its exc.llent generalization to various unseen objec.s during *** proposed PI-FPA presents that c.allenging issues in optic.l metrology.c.n be potentially.overc.me through the sy.ergy.of phy.ic.-priors-based traditional tools and data-driven learning approac.es,opening new avenues to ac.ieve fast and ac.urate single-shot 3D imaging.

关键词： optic.l metrology deep learning phy.ic.-informed neural networks fringe analy.is phase retrieval