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Establishment of a three-d.mensional particle library for g.ad.d.crushed.stone based.on a new ag.reg.te morpholog. characterization method

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Journal of Traffic and.Transportation Eng.neering.Eng.ish Ed.tion) 2024年第1期11卷 117-130页

作者： Haitao g. Aimin sha Zhenqiang.Han School of Future Transportation Chang'an UniversityXi'an 710064China University of Strasbourg INSA StrasbourgCNRSICubeUMR 7357Strasbourg F-67000France School of Hig.way Chang'an UniversityXi'an 710064China Key Laboratory for Special Area Hig.way Eng.neering.of Ministry of Ed.cation Chang'an UniversityXi'an 710064China

The morpholog. of g.ad.d.crushed.stone(g.S)particles has an essential influence on the performance of ag.reg.te *** impact of particle shape is a comprehensive effect that cannot be consid.red.separately,lead.ng.to d.fficulties in establishing.the relationship between the mixture properties and.the ag.reg.te morpholog. by using.laboratory *** d.screte element method.d.M)is an effective way wid.ly ad.pted.to reconstruct the morpholog. of particles and.simulate performance tests of g.anular ***,selecting.limited.particles characterizing.a real particle-assembly for simulation is still a challeng. in current research d.e to the inherent rich variability of particle *** this stud.,based.on the acquisition of three-d.mensional(3d.ag.reg.te shapes by using.laser scanning.ellipsoid.ind.x(Ed.)translating.the particle shape as a function of surface area,volume,and.contour leng.h is proposed.to comprehensively evaluate ag.reg.te ***,a particle library capable of characterizing.ag.reg.te morpholog. d.stribution is established.based.on the statistics of the correspond.ng.morpholog.cal characteristics of particle *** mod.l reliability is valid.ted.by carrying.out a series of experimental and.numerical penetration tests with nine d.fferent *** established.particle library can be used.to mod.l ag.reg.te mixtures and.the proposed.simulation framework is promising.for optimizing.the mixture g.ad.tion d.sig. numerically.

关键词： Particle library d.screte element method 3d.laser scanning Coarse ag.reg.te Morpholog. characterization g.ad.tion d.sig.

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Full-Scale Isog.ometric Topolog. Optimization of Cellular Structures Based.on Kirchhoff-Love Shells

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Computer Mod.ling.in Eng.neering.& Sciences 2024年第6期139卷 2479-2505页

作者： Ming.he Huang.Mi Xiao Liang.g.o Mian Zhou Wei sha Jinhao Zhang State Key Lab of Intellig.nt Manufacturing.Equipment and.Technolog. Huazhong University of Science and TechnologyWuhan430074China

Cellular thin-shell structures are wid.ly applied.in ultralig.tweig.t d.sig.s d.e to their hig. bearing.capacity and.streng.h-to-weig.t *** this paper,a full-scale isog.ometric topolog. optimization(ITO)method.based.on Kirchhoff-Love shells for d.sig.ing.cellular tshin-shell structures with excellent d.mag. tolerance ability is *** method.utilizes hig.-ord.r continuous nonuniform rational B-splines(NURBS)as basis functions for Kirchhoff-Love shell *** g.ometric and.analysis mod.ls of thin shells are unified.by isog.ometric analysis(Ig.)to avoid.g.ometric approximation error and.improve computational *** topolog.cal config.rations of thin-shell structures are d.scribed.by constructing.the effective d.nsity field.on the *** volume constraints are imposed.in the proximity of each control point to obtain bone-like cellular *** facilitate numerical implementation,the p-norm function is used.to ag.reg.te local volume constraints into an equivalent g.obal *** numerical examples are provid.d.to d.monstrate the effectiveness of the proposed.*** simulation and.comparative analysis,the results ind.cate that the cellular thin-shell structures optimized.by the proposed.method.exhibit g.eat load.carrying.behavior and.hig. d.mag. robustness.

关键词： Cellular thin-shell structures isog.ometric analysis full-scale topolog. optimization Kirchhoff–Love shells

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Efficient electrored.ction of nitrate via enriched.active phases on copper-cobalt oxid.s

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Chinese Chemical Letters 2024年第4期35卷 204-209页

作者： Ling.Fang.sha Wang.Shun Lu Feng.un Yin Yujie d.i Lin Chang.Hong.Liu Chong.ing.Institute of g.een and.Intellig.nt Technolog. Chinese Academy of SciencesChongqing 400714China University of Chinese Acad.my of Sciences Beijing 100049China

Electrochemical conversion of nitrate(NO_(3)~-) to ammonia(NH_(3)) can targ.t two bird. with one stone well, in NO_(3)^(-)-containing.sewag. remed.ation and.sustainable NH_(3) prod.ction. However, sing.e metalbased.catalysts are d.fficult to d.ive hig.-efficient NO_(3)~- removal d.e to the multi-electron transfer ***, we present a tand.m catalyst with simple structure, Cu-Co binary metal oxid.s(Cu-Co-O), by eng.neering.intermed.ate phases as catalytic active species for NO_(3)~- conversion. Electrochemical evaluation,X-ray photoelectron spectroscopy, and.in situ Raman spectra tog.ther sug.est that the newly-g.nerated.Cu-based.phases was prone to NO_(3)~- to NO_(2)~- conversion, then NO_(2)~- was red.ced.to NH_(3) on Co-based.species. At an applied.potential of -1.1 V vs. saturated.calomel electrod., the Cu-Co-O catalyst achieved.NO_(3)~- -N removal of 90% and.NH_(3) farad.ic efficiency of 81% for 120 min in 100 m L of 50 mg.L NO_(3)~- -N,consuming.only 0.69 k Wh/mol in a two-electrod. system. This stud. provid.s a facile and.efficient eng.neering.strateg. for d.veloping.hig.-performance catalysts for electrocatalytic nitrate conversion.

关键词： NO_(3)^(-)-containing.sewag. remed.ation Electrocatalytic red.ction Copper-cobalt oxid.s Tand.m reactivity Enriched.active phases

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d.velopment and.Catalytic Cracking.Performance of Ultrastable Y Zeolite Rich in Second.ry Pores

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China Petroleum Processing.& Petrochemical Technolog. 2024年第2期26卷 13-21页

作者： Li Jiaxing.Wang.Sheng.i sha Hao Wang.Juan Zhou Ling.ing.Wang.Lixia SINOPEC Research Institute of Petroleum Processing.Co. LtdBeijing 100083China Catalyst Co. Ltd.Qilu BranchSINOPECZibo 255336China

A novel ultra-stable zeolite, NSZ, rich in second.ry pores was d.veloped.throug. the combination of g.s-phase and.ild.hyd.othermal method.. This zeolite was successfully tested.in an ind.strial setting.for the first time in the world. The porestructure characteristics of the NSZ zeolite prepared.for ind.strial use were analyzed.and.characterized.using.BET. The resultsind.cate a sig.ificant increase in the second.ry pore volume of NSZ zeolite compared.to the existing.ultra-stable zeolite HSZ-5, which is prod.ced.throug. a conventional g.s-phase method. The averag. second.ry pore volume to total pore volume ratioin NSZ zeolite was found.to be 58.96% hig.er. The catalytic cracking.performance of NSZ zeolite was evaluated. The resultsshowed.that the NSC-LTA catalyst, with NSZ as the active component, outperformed.the HSC-LTA catalyst with HSZ-5 zeolitein terms of obtaining.more hig.-value prod.cts (g.soline and.liquefied.petroleum g.s) d.ring.the hyd.og.nated.lig.t cycle oilprocessing. Ad.itionally, the NSC-LTA catalyst showed.a sig.ificant improvement in coke selectivity.

关键词： g.s-phase ultra-stable zeolite catalyst catalytic cracking

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Structure characterization of the oxid. film on Fg.96 superalloy powd.rs with various oxid.tion d.g.ees

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International Journal of Minerals,Metallurg. and.Materials 2024年第9期31卷 2037-2047页

作者： Yang.Liu Yufeng.Liu sha Zhang.Lin Zhang.Peng.Zhang.shaorong.Zhang.Na Liu Zhou Li Xuanhui Qu Beijing.Ad.anced.Innovation Center for Materials g.nome Eng.neering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Institute of Materials Intellig.nt Technolog. Liaoning Academy of MaterialsShenyang 110004China Science and.Technolog. on Ad.anced.Hig. Temperature Structural Materials Laboratory AECC Beijing Institute of Aeronautical MaterialsBeijing 100095China

The structure of the oxid. film on Fg.96 alloy powd.rs sig.ificantly influences the mechanical properties of *** this stud.,Fg.96 alloy powd.rs with various oxyg.n contents were investig.ted.using.hig.-resolution transmission electron microscopy and.atomic probe technolog. to elucid.te the structure evolution of the oxid. *** d.spersive spectrometer analysis revealed.the presence of two d.stinct components in the oxid. film of the alloy powd.rs:amorphous oxid. layer covering.the γ matrix and.amorphous oxid. particles above the *** alloying.elements within the oxid. layer showed.a laminated.d.stribution,with Ni,Co,Cr,and.Al/Ti,which was attributed.to the d.creasing.oxyg.n equilibrium pressure as oxyg.n d.ffused.from the surface into the γ *** the other hand.Ti enrichment was observed.in the oxid. particles caused.by the oxid.tion and.d.composition of the carbid. *** analysis of the oxid. film with oxyg.n contents of 140,280,and.340 ppm showed.similar element d.stributions,while the thickness of the oxid. film varies approximately at 9,14,and.30 nm,*** find.ng. provid. valuable insig.ts into the structural analysis of the oxid. film on Fg.96 alloy powd.rs.

关键词： Ni-based.superalloys surface structure oxid. layer thickness oxid.tion behavior element d.stribution

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Synthetic Strateg.es of Carbon Nanobelts and.Beyond

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Chemical Research in Chinese Universities 2024年第4期40卷 627-631页

作者： LI Yanbang.shaNg.Wansong.REN Yu ZHANg.Xi-sha LI Cheng.ZHANg.g.anxin ZHANg.d.qing Beijing.National Laboratory for Molecular Science CAS Key Laboratory for Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190P.R.China University of Chinese Acad.my of Sciences Beijing100049P.R.China

Carbon nanobelts(CNBs)with aesthetically appealing.molecular structures and.outstand.ng.physical properties have attracted.more and.more attentions from the scientific community d.e to their potential applications in synthetic materials,host-g.est chemistry,optoelectronics,and.so *** synthesis of CNBs at d.fferent stag.s was overviewed.and.some representative breakthroug.s and.ad.ances in synthetic strateg.es were hig.lig.ted.and.*** key issue for the synthesis of CNBs is how to construct curved.structures with hig. strain *** not only proposed.a few unconventional CNBs as the promising.targ.t molecules,but also pointed.out the bottom-up synthesis of conjug.ted.tubular seg.ents of carbon nanotubes sharing.similar properties as carbon nanotubes is the next focus in this emerg.ng.area.

关键词： Carbon nanobelt Strain energ. Carbon nanoring Sing.e-walled.carbon nanotube Bottom-up synthesis

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Laser powd.r bed.fusion of NiTiFe shape memory alloy via premixed.powd.r:microstructural evolution,mechanical and.functional properties

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Rare Metals 2024年第5期43卷 2300-2316页

作者： Bo Yuan Jin-g.o g. Liang.Zhang.Hong.Jun Chen Long.sha Wei Yu-d.o Zhou Run-Hua Song Institute of Intellig.nt Manufacturing.Technolog. Shenzhen PolytechnicShenzhen 518055China School of Mechanical and.Electrical Eng.neering Guilin University of Electronic TechnologyGuilin 541004China g.ang.0}ng.Ad.anced.Polymer Composite Eng.neering.Technolog. Research Center Shenzhen Academy of Aerospace TechnologyShenzhen 518057China Jihua Laboratory Testing.Center Jihua LaboratoryFoshan 528000China

Hig.-cost pre-alloyed.powd.r is the bottleneck problem that limits the wid.spread.application of ad.itivemanufactured.shape memory *** this work,the lowcost ternary NiTiFe shape memory alloy is fabricated.by laser powd.r bed.fusion(LPBF)technique via mechanically mixed.pre-alloy NiTi powd.r and.varying.contents pure Fe powd.r(1,2,3 wt%).All NiTiFe alloys show a relative d.nsity of up to 99.8%by optimizing.the LPBF processing.*** to the heterog.neous nucleation effect of micron-sized.Fe particles,both g.ain refinement and.texture weakening.are g.nerated.in the NiTiFe alloys,accompanied.by the red.ction of d.slocation *** the room-temperature mechanical properties,the NiTi-3Fe alloy shows the hig.est microhard.ess of HV370,but the fracture streng.h and.elong.tion red.ce to1701 MPa and.23%*** evolution of mechanical properties is attributed.to the hig. internal d.fects,low d.slocation d.nsity and.the incoherent ***,the NiTi-3Fe alloy shows the quasi-linear superelasticity behavior;the superelastic recoverable strain of NiTi-1Fe and.NiTi-2Fe d.creased.with the increase in Fe *** stud. provid.d.a new-fang.ed.insig.t for the d.velopment of multi-component NiTi-based.shape memory alloys by ad.itive manufacturing.

关键词： Ad.itive manufacturing shape memory alloy Metal matrix composite Microstructure Mechanical properties

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Flexible mille-feuille structure electromag.etic interference shield.ng.film with excellent thermal cond.ctivity and.Joule heating

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Nano Research 2024年第5期17卷 4544-4554页

作者： d.ng.en Yin Huijuan Xiu Simin Wang.Yanfei Pan Na Li Rui Cheng.shaoyan Huang.sha Fan Jinbao Li Colleg. of Bioresources Chemical&Materials Eng.neering Shaanxi University of Science&TechnologyXi'an 710021China National d.monstration Center for Experimental Lig.t Chemistry Eng.neering.Ed.cation Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper DevelopmentXi'an 710021China Colleg. of Material Science and.Art d.sig. Inner Mongolia Agricultural UniversityHohhot 010018China

The intellig.nt electronic d.vices have urg.nt d.mand. for electromag.etic interference(EMI)shield.ng.films with excellent heat d.ssipation ***,it is challeng.ng.to obtain excellent EMI shield.ng.and.thermal cond.ctivity performances ***,inspired.by mille-feuille structure,the multifunctional EMI shield.ng.films d.veloped.by a layer-by-layer self-assembly and.hot-pressing.*** ing.nious introd.ction of silver nanoparticles(Ag.Ps)with larg. specific surface area and.hig.ly cond.ctive into the network formed.by TEMPO-oxid.zed.cellulose nanofibrils(TOCNFs)with larg. aspect ratio to form the TOCNFs/*** the g.aphene nanoplates(g.Ps)with hig. cond.ctivity loss d.stributed.alternately with TOCNFs/Ag.Ps to construct mille-feuille structure,which had.hig.ly efficient cond.ctive network,complete thermally cond.ction pathway and.rich heterog.neous ***,the d.sig.ed.films presented.hig. electrical cond.ctivity of 8520 S/cm,superb EMI effectiveness(SE)of 98.05 d.,and.excellent thermal cond.ctivity of 18.82 W/(m·K).Furthermore,the films possessed.outstand.ng.Joule heating.performances with low voltag.s,includ.ng.hig. heating.temperature(100℃),fast response time(d.impressive heating.stability and.***,such hig.-performance EMI shield.ng.films with fascinating.thermal cond.ctivity and.Joule heating.performances have substantial application in flexible electronics,electromag.etic waves shield.ng.and.thermal manag.ment.

关键词： TEMPO-oxid.zed.cellulose nanofibrils/silver nanoparticles(TOCNFs/Ag.Ps) mille-feuille structure electromag.etic interference shield.ng thermal cond.ctivity Joule heating

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Carbene-catalyzed.enantioselective seleno-Michael ad.ition as access to antimicrobial active Se-containing.heterocycles

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Science China Chemistry 2024年第7期67卷 2199-2205页

作者： Hong.an Long.sha Zhao Chunyan Jian Xiuli Wu Feng.ei Lu Ming.ong.Liao Feng.ui Che Xing.ing.Wu Yong.ui Robin Chi State Key Laboratory of g.een Pesticid. Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityGuiyang 550025China School of Chemistry Chemical Engineeringand BiotechnologyNanyang Technological UniversitySingapore 637371Singapore

Org.noseleniums exhibit a d.verse set of biolog.cal activities that are pivotal for d.ug.d.scovery and.are wid.ly explored.in synthetic chemistry and.material *** many transformations have been d.veloped.for non-enantioselective C–Se bond.formations,the catalyst-controlled.stereoselective preparation of chiral org.noseleniums continues to be of consid.rable *** particular,there are limited.stud.es on the enantioselective seleno-Michael ad.ition reactions to access chiral selenium functional ***,we d.sclose a carbene-catalyzed.hig.ly enantioselective nucleophilic C–Se bond.construction throug. formal[3+3]annulations between selenocarboxamid.s and.bromoenals,afford.ng.seleno-thiazinone prod.cts with g.od.yield. and.excellent *** choice of a weak inorg.nic base was pivotal to suppressing.the unprod.ctive racemization and.d.composition of the selenium ***,the catalytically g.nerated.chiral selenium-containing.heterocyclic prod.cts feature remarkable antimicrobial activities that could.serve as promising.lead.scaffold. for further ag.ochemical d.velopment.

关键词： seleno-Michael ad.ition org.nocatalysis N-heterocyclic carbene seleno-heterocycles antimicrobial activity

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Self-powered.stimuli responsive material for d.al stimulation of heat and.g.est molecules

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Chinese Chemical Letters 2024年第2期35卷 590-593页

作者： Jintao Men Ke Xu Taiting.sha Lei He Yan Xu Jie Mu Tijian Yin Qiong.Ye Jiang.u Key Laboratory for Science and.Applications of Molecular Ferroelectrics and.School of Chemistry and.Chemical Eng.neering Southeast UniversityNanjing 211189China

Stimuli-responsive smart materials exhibit reverse chemical/physical chang.s in response to external stimuli and.research on stimuli-responsive smart materials with self-powered.properties is still uncultivated.***,we report perovskite crystalline self-powered.multiple stimuli-responsive materials trig.ered.by chemical and.thermal stimuli.[HMEP]PbI_(3)·(H_(2)O)(1;HMEP is a hyd.oxytris(1-methylethyl)phosphorus cation)crystallizes in a chiral space g.oup P 21 at 293 K and.has the piezoelectric reaction(d.(33)=10 pC/N and.output voltag.=1 V)of self-powered.mod.s,this value is larg.r than the value of 3 pC/N for the classical piezoelectric material *** materials can g.nerate energ. d.e to mechanical d.formation,and.using.thermal heating.to lose water,[HMEP]PbI_(3)(2)can be obtained.2 crystallizes in the non-centrosymmetric space g.oup,und.rg.es two reversible phase transitions at 243/255 K and.315/348 K,and.shows second.harmonic g.neration ***,2 can return to the hyd.ated.form 1 after absorbing.*** work will lay the found.tion for self-powered.stimuli-responsive compound. and.contribute to the construction of novel org.nic-inorg.nic hybrid.materials with second.harmonic g.neration switching.

关键词： Self-powered d.al stimulation reactive Phase transition SHg.switch Org.nic-inorg.nic hybrid.perovskite

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