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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

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Decorating crystalline YFe_(2-x)Al_(x) on th. mg_(60)La_(10)Ni_(20)Cu_(10) amorph.us alloy as “h.drogen pump” to realize fast de/h.drogenation

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Journal of materials Science & Tech.ology 2024年第6期173卷 72-79页

作者： L.J.h.ang h.Wang L.z.Ouyang m.zh. h.J.Lin Sch.ol of materials Science and Engineering Key Laboratory of Advanced Energy Storage Materials of Guangdong ProvinceSouth China University of TechnologyGuangzhou 510641China Institute of Advanced Wear&Corrosion Resistance and Functional materials Jinan UniversityGuangzhou 510632China

mg-based amorph.us alloys are one of th. potential h.drogen storage materials but suffer from sluggish.deh.drogenation/h.drogenation(de/h.drogenation)*** th.s work,as a new strategy,a h.drogen pump is built on th. surface of amorph.us alloys to solve th.s *** milling crystalline YFe_(2-x)Al_(x) h.drogen storage alloy with.mg_(60)La_(10)Ni_(20)Cu_(10) amorph.us alloy,fine crystalline particles were seeded on amorph.us alloy powder to form a“strawberry”*** to th. TEm observation,a metallurgical bonding boundary formed between th. mg-based amorph.us matrix and th. Y-Fe-Al crystalline *** microstructure and de/h.drogenation kinetics investigation,th.“h.drogen pump”effect of th. seeded crystalline alloy was confirmed,wh.ch.makes it much.easier for th. h.drogen to dissociate on and diffuse th.ough.th. surface of th. mg-based amorph.us *** such.effect,th. h.absorption rate of mg_(60)La_(10)Ni_(20)Cu_(10) amorph.us alloy became almost eigh. times faster and it absorbs ~2.8 wt.% in 1 h.at 130℃ under 4.5 mPa-h.(2).Furth.r,fast h.drogenation can even ach.eve at 70℃ and th. low-temperature deh.drogenation kinetics of th. amorph.us h.dride can be also greatly *** present work proves th.t surface modification is of great importance for obtaining mg-based amorph.us alloy with.ideal h.drogen storage performance.

关键词： h.drogen storage mg-based amorph.us alloy h.drogen pump Composite structure

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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

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Precipitation of multi-type nano-quasicrystals in a mg-zn-Y alloy

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Journal of magnesium and Alloys 2024年第3期12卷 997-1008页

作者： W.z.Wang X.z.zh.u L.F.zh.ng h.Q.Ye z.Q.Yang Sh.nyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China Ji h.a Laboratory Foshan 528251China Fosh.n University Foshan 528231China

mg-6zn-1Y(at.%)ribbons with.strength.ning precipitates of multi-type nanoquasicrystals were prepared by melt-spinning followed by aging *** evolution of th. rapidly solidified ribbons during isoth.rmal aging was compreh.nsively studied using various electron microscopy *** new kinds of decagonal quasicrystals were formed in aged ribbons,in addition to precipitation of nanometer icosah.dral ***-resolution observations reveal th.t both.decagonal quasicrystals can be modeled by quasiperiodic tiling with.decagonal clusters of 2.5 nm in diameter,but overlap of neigh.oring clusters in both.decagonal quasicrystals is different from th. Gummelt model observed in oth.r quasicrystals.A sh.ll composed of complex Laves mg-zn domains was formed surrounding each.decagonal quasicrystal precipitate upon prolonged *** addition,all kinds of nanoprecipitates exh.bit excellent structure and size stability at 573 *** findings may h.ve implications for not only fundamental studies about quasicrystals,but also microstructural manipulation of h.gh.performance mg alloys.

关键词： Quasicrystal mg alloys Rapid solidification Scanning-transmission electron microscopy.

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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

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Fast efficient ph.ton deceleration in plasmas by using two laser pulses at different frequencies

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matter and Radiation at Extremes 2024年第3期9卷 11-18页

作者： Y.X.Wang X.L.zh. S.m.Weng P.Li X.F.Li h.Ai h.R.Pan z.m.Sh.ng Key Laboratory for Laser Plasmas(moe) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China Research.Center of Laser Fusion of Ch.na Academy of Engineering Ph.sics MianyangSichuan 621900China State key Laboratory of h.gh.Field Laser Ph.sics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

Th. generation of ultrash.rt h.gh.power ligh. sources in th. mid-infrared(mid-IR)to terah.rtz(Th.)range is of interest for applications in a number of fields,from fundamental research.to biology and *** conventional laser tech.ology,ph.ton deceleration in plasma wakes provides an alternative approach.to th. generation of ultrash.rt mid-IR or Th. ***,we present a ph.ton deceleration sch.me for th. efficient generation of ultrash.rt mid-IR or Th. pulses by using an intense driver laser pulse with.a relatively sh.rt wavelength.and a signal laser pulse with.a relatively long *** signal pulse trails th. driver pulse with.an appropriate time delay such.th.t it sits at th. front of th. second wake bubble th.t is driven by th. driver *** to its relatively long wavelength.th. signal pulse will be subjected to a large gradient of th. refractive index in th. plasma wake ***,th. ph.ton deceleration in th. plasma wake becomes faster and more efficient for signal pulses with.longer *** greatly enh.nces th. capacity and efficiency of ph.ton deceleration in th. generation of ultrash.rt h.gh.power ligh. sources in th. long-wavelength.IR and Th. spectral ranges.

关键词： laser ultrash.rt ph.ton

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Greatly enh.nced corrosion/wear resistances of epoxy coating for mg alloy th.ough.a synergistic effect between functionalized graph.ne and insulated blocking layer

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Journal of magnesium and Alloys 2024年第1期12卷 332-344页

作者： z.Y.Xue X.J.Li J.h.Ch. m.m.Li D.N.zou L.B.Tong Sch.ol of metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Advanced Design and manufacturing for Veh.cle Body Hunan UniversityChangsha 410082China

Th. poor corrosion and wear resistances of mg alloys seriously limit th.ir potential applications in various *** conventional epoxy coating easily forms many intrinsic defects during th. solidification process,wh.ch.cannot provide sufficient *** th. current study,we design a double-layer epoxy composite coating on mg alloy with.enh.nced anti-corrosion/wear properties,via th. spin-assisted assembly *** outer layer is functionalized graph.ne(FG)in waterborne epoxy resin(WEP)and th. inner layer is Ce-based conversion(Ce)*** FG sh.ets can be h.mogeneously dispersed with.n th. epoxy matrix to fill th. intrinsic defects and improve th. barrier *** Ce film connects th. outer layer with.th. substrate,sh.wing th. transition *** corrosion rate of Ce/WEP/FG composite coating is 2131 times lower th.n th.t of bare mg alloy,and th. wear rate is decreased by~90%.Th. improved corrosion resistance is attributed to th. labyrinth.effect(h.ndering th. penetration of corrosive medium)and th. obstruction of galvanic coupling *** synergistic effect derived from th. FG sh.et and blocking layer exh.bits great potential in realizing th. improvement of multi-functional integration,wh.ch.will open up a new avenue for th. development of novel composite protection coatings of mg alloys.

关键词： mg alloy Functionalized graph.ne Epoxy coating Corrosion/wear resistance Blocking layer

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Research.onmaneuver Decision-making ofmulti-Agent Adversarial Game in a Random Interference Environment

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Computers, materials and Continua 2024年第1期81卷 1879-1903页

作者： h. S. Ru L. Lu B. Wang z. zh.o X. Wang W. Xi h. Equipment management and UAV Engineering College Air Force Engineering University Xi'an 710051 China National Key Laboratory of Unmanned Aerial Veh.cle Tech.ology Xi'an 710051 China College of Information Tech.ology Nanjing Police University Nanjing 210023 China

Th. strategy evolution process of game players is h.gh.y uncertain due to random emergent situations and oth.r external disturbances. Th.s paper investigates th. issue of strategy interaction and beh.vioral decision-making among game players in simulated confrontation scenarios with.n a random interference environment. It considers th. possible risks th.t random disturbances may pose to th. autonomous decision-making of game players, as well as th. impact of participants' manipulative beh.viors on th. state ch.nges of th. players. A nonlinear math.matical model is establish.d to describe th. strategy decision-making process of th. participants in th.s scenario. Subsequently, th. strategy selection interaction relationsh.p, strategy evolution stability, and dynamic decision-making process of th. game players are investigated and verified by simulation experiments. Th. results sh.w th.t maneuver-related parameters and random environmental interference factors h.ve different effects on th. selection and evolutionary speed of th. agent's strategies. Especially in a h.gh.y uncertain environment, even small information asymmetry or miscalculation may h.ve a significant impact on decision-making. Th.s also confirms th. feasibility and effectiveness of th. meth.d proposed in th. paper, wh.ch.can better explain th. beh.vioral decision-making process of th. agent in th. interaction process. Th.s study provides feasibility analysis ideas and th.oretical references for improving multi-agent interactive decision-making and th. interpretability of th. game system model. © 2024 Th. Auth.rs. Publish.d by Tech.Science Press.

关键词： Beh.vior decision-making maneuver multi-agent nonlinear math.matical modeling stoch.stic evolutionary game

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Exploring Variability in Sea Level at a Tide Gauge Station th.ough.Control Ch.rts

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Journal of Environmental & Earth.Sciences 2024年第1期6卷 11-18页

作者： h.Bâkiİz Independent Sch.lar Boca Raton Florida33496USA

monitoring temporal ch.nges in sea level is important in assessing coastal *** level anomalies at a tide gauge station,if kinematically conceived,include systematic variations such.as trend,acceleration,periodic oscillations,and random *** th.m,th. non-stationary nature of th. random sea level variations of known or unknown origin at coastal regions h.s been long recognized by th. sea level *** study proposes th. analyses of subgroups of random residual statistics of a rigorously formulated kinematic model solution of tide gauge variations using X-bar and S control *** approach.is demonstrated using Key West,Florida tide gauge *** mean and standard errors of 5-year-long subgroups of th. residuals revealed th.t sea level ch.nges at th.s location h.ve been progressively intensifying from 1913 to th. *** oscillations in sea level at th.s locality may be attributed partly to th. th.rmal expansion of seawater with.increasing temperatures causing larger buoyancy-related sea level fluctuations as well as th. intensification of atmosph.ric events including wind patterns and th. impact of ch.nges in inverted barometer effects th.t will alter coastal risk assessments for th. future.

关键词： Climate ch.nge Sea level variance X-bar S control ch.rts

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microstructure evolution and sh.pe memory beh.viors of Ni_(47)Ti_(44)Nb_(9)alloy subjected to multistep th.rmomech.nical loading with.different prestrain levels

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Journal of materials Science & Tech.ology 2024年第4期171卷 80-93页

作者： Y.h.zh.ng h.Li z.W.Yang X.Liu Q.F.Gu State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Sh.anxi Key Laboratory of h.gh.Performance Precision Forming Tech.ology and Equipment Northwestern Polytechnical UniversityXi’an 710072China

Ni_(47)Ti_(44)Nb_(9)sh.pe memory alloy(SmA)is a promising material in th. aerospace field due to its wide transformation *** application of sh.pe memory effect depends on multistep th.rmomech.n-ical loading,viz.,low-temperature deformation and subsequent h.ating to ***-temperature deformation prestrain plays a pivotal role in sh.pe memory properties tailoring of SmA ***,microstructure evolution and deformation mech.nisms of Ni_(47)Ti_(44)Nb_(9)SmA subjected to vari-ous prestrain levels are still *** th.s end,microstructure evolution and sh.pe memory beh.viors of Ni_(47)Ti_(44)Nb_(9)alloy subjected to multistep th.rmomech.nical loading with.prestrain levels of 8%-16%at-28℃(m_(s)+30℃)were *** results demonstrate th.t th. stress-strain curve of th. specimen exh.bits four distinct stages at a maximal prestrain of 16%.Wh.reas stageⅡand stageⅢend at prestrains of∼8%and∼12%,*** stageⅡ,th. stress-induced martensitic transformation is accompanied by th. dislocation slip of th. NiTi matrix andβ-Nb *** stageⅢ,in addition to th. h.gh.r density of dislocations and furth.r growth.of stress-induced martensite variants(SImVs),(001)compound twins are introduced as a result of th.(001)deformation twinning in stress-induced ***{20-1}martensite twins are gradually introduced in stageⅣ.Correspondingly,after subsequent unloading and h.ating,a h.gh.r density of{114}austenite twins form in th. specimen with.a larger prestrain of 16%.With.increasing prestrain from 8%to 16%,th. recoverable strainε_(re)^(T)upon h.ating increases first and th.n ***ε_(re)^(T)obtains a maximum of 7.03%at 10%prestrain and de-creases to 6.17%at 16%*** increase ofε_(re)^(T)can be attributed to th. formation of new SImVs,th. furth.r growth.of existing SImVs,and th. recoverable(001)compound *** th. decrease ofε_(re)^(T)is mainly associated with.th. irrecoverable strain by{20−1}martensite *** effe

关键词： Ni_(47)Ti_(44)Nb_(9)sh.pe memory alloy Wide transformation h.steresis Th.rmomech.nical loading microstructure evolution Sh.pe memory beh.viors Stress-induced martensitic transformation Deformation twinning

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