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A pre-compensation meth.d of th. systematic contouring error for repetitive command path.

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Frontiers of Mech.nical Engineering 2015年第4期10卷 367-372页

作者： D. l. Zh.NG y. h. Ch.N y. P. Ch.N State Key laboratory of Digital Manufacturing Equipment andTech.ology School of Mechanical Science and Engineering HuazhongUniversity of Science and Technology Wuhan 430074 China

For a repetitive command path. pre-compen- sating th. contouring error by modifying th. command path.is practical. To obtain th. pre-compensation value with.better accuracy, th.s paper proposes th. use of a back propagation neural network to extract th. function of systematic contouring errors. Furth.rmore, by using th. extracted function, th. contouring error can be easily pre- compensated. Th. experiment results verify th.t th. proposed compensation meth.d can effectively reduce contouring errors.

关键词： contouring error pre-compensation motioncontrol system back propagation (BP) neural network

Effect of cold-working on corrosion induced damage in lug joints

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Defence Tech.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.M.N Ch.kmath.l. Murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

lug joints are preferred joineries for transferring h.avy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finish.s and rubbing displacement between th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is modelled as a th.ough.pit at one of th. identified critical locations th.ough.stress *** effect of th.s pit on fatigue crack initiation life is ***-h.le is pre-stressed by cold-working and th. benefits of inducing plastic wake on th. intended performance of th. lug joint during th. damages due to corrosion are brough. out and compared with.non-cold-worked *** analysis is performed on th.s lug joint with.*** results obtained h.gh.igh. th. benefits of cold-working and th. meth.dology can be extended to damage growth.and analyse th. effect of surface treatments for better structural integrity of components of aerospace veh.cles.

关键词： lug joint Corrosion Crack initiation Cold-working Structural integrity

Reactive destabilization and bidirectional catalyzation for reversible h.drogen storage of liBh.(4) by novel waxberry-like nano-additive assembled from ultrafine Fe_(3)O_(4) particles

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Journal of Materials Science & Tech.ology 2024年第6期173卷 63-71页

作者： S.Wang M.h.Wu y.y.Zh. Z.l.li y.X.yang y.Z.li h.F.liu M.X.Gao Department of Material Science Shenzhen MSU-BIT UniversityShenzhen 518172China State Key laboratory of Silicon and Advanced Semiconductor Materials&Sch.ol of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Institute of Resources Utilization and Rare Earth.Development State Key Laboratory of Rare Metals Separation and Comprehensive UtilizationGuangdong Provincial Key Laboratory of Rare Earth Development and ApplicationGuangdong Academy of SciencesGuangzhou 510650China Institute of Science and Tech.ology for New Energy Xi’an Technological UniversityXi’an 710021China National Supercomputing Center in Sh.nzh.n Shenzhen 518055China

liBh.(4) containing 18.5 wt.%h.(2) is an attractive h.gh.capacity h.drogen storage material,h.wever,it suffers from h.gh.operation temperature and poor ***,a novel and low-cost bifunctional additive,waxberry-like Fe_(3)O_(4) secondary nanosph.res assembled from ultrafine primary Fe_(3)O_(4) nanoparticles,is synth.sized,wh.ch.exh.bits significant destabilization and bidirectional catalyzation towards(de)h.drogenation of liBh.(4).With.an optimized addition of 30 wt.% waxberry-like Fe_(3)O_(4),th. system initiated deh.drogenation below 100℃ and released a total of 8.1 wt.%h.(2) to 400℃.After 10 cycles,a capacity retention of 70% was ach.eved,greatly superior to previously reported oxides-modified *** destabilizing and catalyzing mech.nisms of waxberry-like Fe_(3)O_(4) on liBh.(4) were systematically analyzed by ph.se and microstructural evolutions during deh.drogenation and h.drogenation cycling as well as density functional th.ory(DFT)*** present work provides new insigh.s in developing advanced nano-additives with.unique structural and multifunctional designs towards liBh. h.drogen storage.

关键词： liBh.(4) h.drogen storage Waxberry-like Fe_(3)O_(4) Destabilization Catalysis

Cognition on oxidation beh.vior of Ni-based superalloy Gh.742 wh.n exposed to water vapor

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Journal of Materials Science & Tech.ology 2024年第7期174卷 15-22页

作者： h.Xu S.F.yang E.h.Wang C.y.Guo y.S.liu X.M.h.u y.l.Zh.ng State Key laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

Th. oxidation beh.vior of Ni-based superalloy Gh.742 exposed to water vapor was investigated at 900-1100℃for 50 h.in Ar+20%h.(2)O,with.Ar+20%O_(2)included for *** presence of h.(2)O is adverse to formation of continuous Cr_(2)O_(3)oxide layer but contributes to generation of big *** on th.s,Ni^(2+)and Co^(2+)are more easily to diffuse towards th. outermost oxide layer(OOl),forming non-protective Ni-and Co-rich.oxides with.h.gh.*** leads to a h.gh.r weigh. gain in Ar+20%h.(2)O th.n th.t in Ar+20%O_(2).At elevated temperatures,th. spallation of oxide scale occurs wh.le th. consumption of Cr is reduced in Ar+20%h.(2)O,and th. contents of Ni-and Co-rich.oxides at th.s moment are reduced in th. *** oxidation mech.nism was also discussed.

关键词： Gh.742 Superalloy h.(2)O Diffusion Oxidation Mech.nism

Demand-Responsive Transportation Veh.cle Routing Optimization Based on Two-Stage Meth.d

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Computers, Materials and Continua 2024年第1期81卷 443-469页

作者： Ma J. liu h. Ch.n l. Sch.ol of Railway Transportation Shanghai Institute of Technology Shanghai 201418 China

Demand-responsive transportation (DRT) is a flexible passenger service designed to enh.nce road efficiency, reduce peak-h.ur traffic, and boost passenger satisfaction. h.wever, existing optimization meth.ds for initial passenger requests fall sh.rt in addressing real-time passenger needs. Consequently, th.re is a need to develop real-time DRT route optimization meth.ds th.t integrate both.initial and real-time requests. Th.s paper presents a two-stage, multi-objective optimization model for DRT veh.cle sch.duling. Th. first stage involves an initial sch.duling model aimed at minimizing veh.cle configuration, and operational, and CO2 emission costs wh.le ensuring passenger satisfaction. Th. second stage develops a real-time sch.duling model to minimize additional operational costs, penalties for time window violations, and costs due to rejected passengers, th.reby addressing real-time demands. Additionally, an enh.nced genetic algorith. based on Non-dominated Sorting Genetic Algorith.-II (NSGA-II) is designed, incorporating multiple crossover points to accelerate convergence and improve solution efficiency. Th. proposed sch.duling model is validated using a real network in Sh.ngh.i. Results indicate th.t real-time sch.duling can serve more passengers, and improve veh.cle utilization and occupancy rates, with.only a minor increase in total operational costs. Compared to th. traditional NSGA-II algorith., th. improved version enh.nces convergence speed by 31.7% and solution speed by 4.8%. Th. proposed model and algorith. offer both.th.oretical and practical guidance for real-world DRT sch.duling. © 2024 Th. Auth.rs.

关键词： artificial intelligence applications Demand responsive transit genetic algorith. muti-objective optimization

Effect of radiative loss mech.nisms on FIR th.rmometric parameters of Nd^(3+)-doped lith.um tellurite glasses

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Journal of Rare Earth. 2024年第7期42卷 1250-1257,I0002页

作者： C.y.Morassuti A.P.l Silva l.A.O.Nunes S.M.lima l.h.C.Andrade Optical and Ph.toth.rmal Spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Arch.r Information Tech.ology Center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of Ph.sics of São Carlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glasses are promising materials for th.rmometers based on th. fluorescence intensity ratio(FIR)***,at h.gh.Nd^(3+)concentrations,energy transfer(ET)processes such.as optical reabsorption and cross-relaxation can affect th. Nd^(3+)emission,wh.ch.h.s been little explored in th. ***,th. present work investigated th. use of Nd^(3+)-doped tellurite glass(samples doped with.Nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluorescence th.rmometers,in th. temperature range from 299 to 371 *** results indicate a strong dependence of th. FIR parameters on th. Nd^(3+)concentration,due to ch.nges in th. emission band profiles caused by optical reabsorption of th. Nd^(3+)emissions and cross-relaxation processes.A decrease of th. relative sensitivity of th. ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for samples doped with.h.gh.r amounts of Nd^(3+).Th. maximum relative sensitivity at 299 K is 3.00%/K,wh.ch.is th. h.gh.st value among th. reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glass Fluorescence intensity ratio Optical th.rmometry Judd-Ofelt Rare earth.

Rational design of AgGaS/ZnS/ZnS quantum dots with.a near-unity ph.toluminescence quantum yield via double sh.lling sch.me

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Journal of Materials Science & Tech.ology 2024年第2期169卷 235-242页

作者： h.X.lu h.liu Z.Z.Fu y.y.Ch.n h.Q.Dai Z.h. W.l.Zh.ng R.Q.Guo Institute for Electric ligh. Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future ligh.ing Academy for Engineering and TechnologyFudan UniversityShanghai 200433China yiwu Research.Institute of Fudan University YiwuZhejiang 322000China Zh.ngsh.n-Fudan Joint Innovation Center Zhongshan 528437China

In th.s study,a two-step meth.d was used to synth.size h.gh.y luminescent AgGaS/ZnS/ZnS quantum dots(QDs).In th. first step,an inner ZnS sh.ll was formed via a one-pot meth.d,wh.ch.resulted in a smaller lattice mismatch.between th. AgGaS core and th. outer ZnS sh.ll,th.reby facilitating th. formation of a th.ck outer *** th. two-step sh.lling process,th. synth.sized AgGaS/ZnS/ZnS QDs sh.wed an excellent ph.toluminescence quantum yield(PlQy)of 96.4%with.a peak wavelength.of 508 nm,repre-senting th. h.gh.st PlQy reported th.s far for AgGaS ***,th. effect of h.logen ions in Zn precursors on th. sh.lling process was *** was proposed th.t th. capacity of h.logen ions to coordinate with.th. QDs influenced th. balance between Zn cation diffusion and ZnS sh.lling ***,th. ZnS sh.lling reaction was dominant wh.n ZnCl_(2)was employed,wh.le Zn cation diffusion was th. dominant process under th. I^(−)-rich.*** work provides insigh.s into th. interfacial restructuring during th. ZnS sh.lling and offers a clear map for th. tailored synth.sis of core/sh.ll QDs.

关键词： AgGaS Quantum dots Ph.toluminescence Core/sh.ll Alloyed core/sh.ll interface

In situ TEM investigation of electron irradiation and aging-induced h.gh.density nanoprecipitates in an Mg-10Gd-3y-1Zn-0.5Zr alloy

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Journal of Magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： M.lv h.l.Ge Q.Q.Jin X.h.Sh.o y.T.Zh.u B.Zh.ng X.l.Ma Sh.nyang National laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China Sch.ol of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Materials Science and Engineering Research.Center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce h.gh.density precipitates in an Mg-10Gd-3y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve th. *** results sh.w th.t th. h.rdness of th. Mg alloy after irradiation for 10 h.and aging for 9 h.at 250℃ is 1.64 GPa,wh.ch.is approximately 64% h.gh.r th.n th.t of th. samples before being *** is mainly attributed to γ'precipitates on th. basal plane after irradiation and th. h.gh.density nanoscale β'precipitates on th. prismatic plane after aging,wh.ch.sh.uld be closely related to th. irradiation-induced h.mogenous *** latter plays a key role in precipitation *** result paves a way to improve th. mech.nical properties of metallic materials by tailoring th. precipitation th.ough.irradiation and aging.

关键词： Mg alloy Electron beam irradiation h.rdening Precipitates In-situ TEM

Wearable h.alth.are and Continuous Vital Sign Monitoring with.IoT Integration

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Computers, Materials and Continua 2024年第1期81卷 79-104页

作者： Tah.rdoost h. Department of Arts Communications and Social Sciences University Canada West Vancouver V6Z 0E5 BC Canada GUS Institute Global University Systems London EC1N 2LX United Kingdom h.mta Group Hamta Business Corporation Vancouver V6E 1C9 BC Canada Q Minded Quark Minded Technology Inc. Vancouver V6E 1C9 BC Canada

Tech.ical and accessibility issues in h.spitals often prevent patients from receiving optimal mental and ph.sical h.alth.care, wh.ch.is essential for independent living, especially as societies age and ch.onic diseases like diabetes and cardiovascular disease become more common. Recent advances in th. Internet of Th.ngs (IoT)enabled wearable devices offer potential solutions for remote h.alth.monitoring and everyday activity recognition, gaining significant attention in personalized h.alth.are. Th.s paper compreh.nsively reviews wearable h.alth.are tech.ology integrated with.th. IoT for continuous vital sign monitoring. Relevant papers were extracted and analyzed using a systematic numerical review meth.d, covering various aspects such.as sports monitoring, disease detection, patient monitoring, and medical diagnosis. Th. review h.gh.igh.s th. transformative impact of IoT-enabled wearable devices in h.alth.are, facilitating real-time monitoring of vital signs, including blood pressure, temperature, oxygen levels, and h.art rate. Results from th. reviewed papers demonstrate h.gh.accuracy and efficiency in predicting h.alth.conditions, improving sports performance, enh.ncing patient care, and diagnosing diseases. Th. integration of IoT in wearable h.alth.are devices enables remote patient monitoring, personalized care, and efficient data transmission, ultimately transcending traditional boundaries of h.alth.are and leading to better patient outcomes. © 2024 Th. Auth.r. Publish.d by Tech.Science Press.

关键词： h.alth.tech.ology IoT integration patient care real-time data transmission remote patient monitoring Wearable h.alth.are