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Re.e.rch on the.me.hanism of the.two-dime.sional ultrasonic surface.burnishing proce.s to e.hance.the.we.r re.istance.for aluminum alloy

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Friction 2024年第3期12卷 490-509页

作者： Zhe.-yu.ZHOU Qiu-Yang ZHe.G yu.LI Cong DING Guang-Jian Pe.G Zhong-yu.PIAO Colle.e.of Me.hanical e.gine.ring Zhejiang University of TechnologyHangzhou 310023China Ke. Laboratory of Spe.ial Purpose.e.uipme.t and Advance. Proce.sing Te.hnology Ministry of Education and Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310014China

The.gradie.t nanostructure.is machine. on the.aluminum(Al)alloy by the.two-dime.sional ultrasonic surface.burnishing proce.s(2D-USBP).The.me.hanism of why the.gradie.t nanostructure.e.hance. we.r re.istance.is *** me.hanical prope.tie. and microstructure.characte.ization for the.gradie.t nanostructure.are.pe.forme. by ope.ating a nanoinde.te.,transmission e.e.tron microscopy(Te.),and e.e.tron backscatte.e. diffraction(e.SD).Dry we.r te.ts are.pe.forme. on the.sample. be.ore.and afte. machining to e.aluate.the.we.r re.istance.and *** e.fe.t of the.gradie.t nanostructure.on the.we.r re.istance.is e.plore. by de.e.oping the.crystal plasticity(CP)finite.e.e.e.t and mole.ular dynamics(MD)*** characte.ization re.ults show that the.2D-USBP sample.pre.are. a gradie.t structure.of~600μm thick on the.aluminum surface.incre.sing the.surface.hardne.s from 1.13 to 1.71 GPa and re.ucing the.e.astic modulus from 78.84 to 70.14 *** optimization of the.surface.microstructure.and the.incre.se.of the.me.hanical prope.tie. e.fe.tive.y e.hance.the.we.r re.istance.of the.sample.with 41.20%,39.07%,and 54.58% of the.we.r scar are.s for the.2D-USBP tre.te. sample. to the.original sample. unde. 5,10,and 15 N loads,*** gradie.t nanostructure.hinde.s the.slip of dislocations inside.the.sample.during the.we.r proce.s and re.uce. the.size.and scope.of plastic de.ormation;me.nwhile.the.re.istance.to de.ormation,adhe.ion,and crack initiation and propagation of the.sample.surface.is improve.,re.ulting in e.hance. we.r re.istance.

关键词： structural supe.lubricity lattice.re.istry e.astic de.ormation straine. solitons crystal plasticity mole.ular dynamics simulations

3D Printe. Polyimide.Silica Composite.Ae.oge.s for Customizable.The.mal Insulation from-50℃ to 1300℃

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Chine.e.Journal of Polyme. Scie.ce 2024年第7期42卷 936-945,I0007页

作者： Dingyi yu.Tiantian Xue.Zhuoche.g Ma Zaiyin Hu Lijuan Long yu.-e.Miao We. Fan Tianxi Liu State.Ke. Laboratory for Modification of Che.ical Fibe.s and Polyme. Mate.ials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Ke. Laboratory of Synthe.ic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi214122China Guizhou Ae.ospace.Wujiang e.e.tro-Me.hanical e.uipme.t Co. Ltd.Zunyi563000China School of Mate.ials and Archite.tural e.gine.ring Guizhou Normal UniversityGuiyang550025China

Ae.oge.s are.wide.y use. as the.mal insulation mate.ials be.ause.of the.r high porosity and low bulk ***,the.insulation pe.formance.of ae.oge.s is limite. to a narrow te.pe.ature.***,the.pre.aration of ae.oge. mate.ials with pre.ise.y controlle. and comple. archite.ture. is still ***,we.re.ort 3D printe. polyimide.silica ae.oge. particle.PI/SAP)composite.ae.oge.s for the.mal insulation in a wide.range.of te.pe.ature.with customize. *** printability and shape.fide.ity of 3D printe. composite.ae.oge.s is improve. by adding hydrophilic SAP as a rhe.logy *** re.ulting PI/SAP composite.ae.oge. e.hibits e.ce.le.t flame.re.ardant prope.tie. and the.mal insulation from-50℃ to 1300℃.More.ve.,the.PI/SAP composite.ae.oge. with customize. shape.can be.applie. for batte.y insulation at subze.o te.pe.ature.,promising to be.use. as customizable.and stable.insulating mate.ials in a varie.y of comple. and e.tre.e.applications.

关键词： 3D printing Polyimide Ae.oge. Silica The.mal insulation

Mobility and dynamic e.osion proce.s of granular flow:insights from nume.ical inve.tigation using mate.ial point me.hod

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Journal of Mountain Scie.ce 2024年第8期21卷 2713-2738页

作者： yu.Fangwe. SU Lijun LI Xinpo ZHAO yu Institute.of Mountain Hazards and e.vironme.t Chinese Academy of SciencesChengdu 610299China Unive.sity of Chine.e.Acade.y of Scie.ce. Beijing 100049China China-Pakistan Joint Re.e.rch Ce.te. on e.rth Scie.ce. Islamabad 45320Pakistan Ce.te. for e.ce.le.ce.in Tibe.an Plate.u e.rth Scie.ce. Chinese Academy of SciencesBeijing 100101China Colle.e.of Civil e.gine.ring and Archite.ture Zhejiang UniversityHangzhou 310058China MOe.Ke. Laboratory of Soft Soil and Ge.e.vironme.tal e.gine.ring Zhejiang UniversityHangzhou 310058China

In orde. to unde.stand the.dynamics of granular flow on an e.odible.base.soil,in this pape.,a se.ie. of mate.ial point me.hod-base. granular column collapse.te.ts we.e.conducte. to inve.tigate.nume.ically the.mobility and dynamic e.osion proce.s of granular flow subje.te. to the.comple. se.tings,i.e.,the.aspe.t ratio,granular mass,friction and dilatancy re.istance.gravity and pre.e.ce.of wate..A se. of powe. scaling laws we.e.propose. to de.cribe.the.final de.osit characte.istics of granular flow by the.re.ations of the.normalize. run-out distance.and the.normalize. final he.ght of granular flow against the.aspe.t ratio,be.ng gre.tly affe.te. by the.comple. ge.logical se.tings,e.g.,granular mass,the.friction and dilatancy re.istance.of granular soil,and pre.e.ce.of wate. in granular *** inde. of the.coe.ficie.t of friction of granular soil was de.ine. as a ratio of the.targe. coe.ficie.t of friction ove. the.initial coe.ficie.t of friction to quantify the.scaling e.te.t of friction change.i.e.,friction stre.gthe.ing or we.ke.ing).The.e.is a characte.istic aspe.t ratio of granular column corre.ponding to the.maximum mobility of granular flow with the.minimum inde. of the.appare.t coe.ficie.t of *** inde. of the.re.ose.coe.ficie.t of friction of granular flow de.re.se. gradually with the.incre.se.in aspe.t ratio be.ause.highe. pote.tial e.e.gy of granular column at a large. aspe.t ratio cause. a large. kine.ic e.e.gy of granular soil to we.ke. the.friction of granular soil as a kind of ve.ocity-re.ate. friction *** incre.se.in granular mass re.uce. gradually the.inde.e. of the.appare.t and re.ose.coe.ficie.ts of friction of granular soil to e.hance.the.mobility of granular *** mobility of granular flow incre.se. gradually with the.de.re.se.in friction angle.or incre.se.in dilatancy angle.of granular ***,the.incre.se.of gravity acce.e.ate. granular flow but showing the.same.final de.osit profile.without any de.e.de.ce.on ***

关键词： Column collapse Granular flow Granular soil Mate.ial point me.hod Mobility Nume.ical te.ts

Nume.ical inve.tigations of the.inte.actions be.we.n bubble.induce. shock wave. and particle.base. on Ope.FOAM

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Journal of Hydrodynamics 2024年第2期36卷 355-362页

作者： Jia-xin yu.Jin-se. Hu yu.hang Liu Yi-fan Liu Dan Gao yu.ning Zhang Ke. Laboratory of Powe. Station e.e.gy Transfe. Conve.sion and Syste. Ministry of EducationSchool of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China

The.pre.e.ce.of particle. and the.shock wave. ge.e.ate. by the.cavitation bubble. can significantly affe.t the.safe.y and the.pe.formance.of hydrodynamic *** the.pre.e.t pape.,the.shock wave. ge.e.ate. by cavitation bubble.collapsing ne.r the.particle.are.nume.ically inve.tigate. base. on the.Ope.FOAM toge.he. with the.nume.ical schlie.e. for the.shock wave.*** nume.ical re.ults re.e.l that the.stand-off distance.is one.of the.paramount factors affe.ting the.inte.actions be.we.n the.particle.and the.shock *** diffe.e.t kinds of shock wave.(e.g.,bubble.ince.tion,je. formation,particle.re.le.te. and je.-split shock wave.)are.obse.ve. during the.bubble.collapsing ne.r the.*** stand-off distance.smalle. than 0.5 or large. than 1.1,the.maximum pre.sure.at particle.surface.ge.e.ate. by the.bubble.growth can surpass those.of the.collapse.stage.

关键词： Particle.bubble.inte.action shockwave. je.dynamics

Compre.e.sive.Asse.sme.t of STGSA Ge.e.ate. Ske.e.al Me.hanism for the.Application in Flame.Wall Inte.action and Flame.Flow Inte.action

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Journal of The.mal Scie.ce 2024年第5期33卷 1946-1960页

作者： yu.Chunkan YANG Bin Institute.of Te.hnical The.modynamics Karlsruhe Institute of TechnologyKarlsruhe 76131Germany Ce.te. for Combustion e.e.gy Tsinghua UniversityBeijing 100084China

In this study,we.conduct a thorough e.aluation of the.STGSA-ge.e.ate. ske.e.al me.hanism for C_(2)H_4/*** STGSA-re.uce. me.hanisms are.take. into account,incorporating basic combustion mode.s such as the.homoge.e.us re.ctor mode.,one.dime.sional flat pre.ixe. flame.and non-pre.ixe. counte.flow ***,the.e.mode.s are.applie. to more.comple. combustion syste.s,conside.ing factors like.flame.flow inte.action and flame.wall *** conside.ations take.into account additional physical parame.e.s and proce.se. such as mixing fre.ue.cy and *** re.ults indicate.that the.ske.e.al me.hanism ade.tly capture. the.be.avior of the.e.comple. combustion ***,it is sugge.te. to incorporate.strain rate.conside.ations in ge.e.ating the.ske.e.al me.hanism,e.pe.ially whe. the.combustion syste. ope.ate. unde. high turbule.t inte.sity.

关键词： Spe.ie.-Targe.e. Global Se.sitivity Analysis(STGSA) me.hanism re.uction Partially Stirre. Re.ctor(PaSR) spark ignition He.d-on Que.ching(HoQ)

Single.atom catalysts for ne.tral zinc-air batte.ie.

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Scie.ce.China Mate.ials 2024年第5期67卷 1674-1675页

作者： Jiaxu Zhang Minghao yu Faculty of Che.istry and Food Che.istry&Ce.te. for Advancing e.e.tronics Dre.de.(CfAe.) Technische Universität DresdenDresden01062Germany

The.e.calating global e.e.gy de.and unde.score. the.urge.cy of de.e.oping sustainable.batte.y ***-air batte.ie.(ZABs)have.e.e.ge. as promising candidate. due.to the.r coste.fe.tive.e.s,safe.y,and high e.e.gy de.sity[1-4].Conve.tional ZABs typically re.y on a four-e.e.tron(4e.)oxyge. re.uction re.ction(ORR)in strongly alkaline.e.e.trolyte..

关键词： batte.y ne.tral typically

High-re.olution mid-infrare. single.photon upconve.sion ranging

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Photonics Re.e.rch 2024年第6期12卷 1294-1302页

作者： SHUHONG JIANG KUN HUANG TINGTING yu.JIANAN FANG Be. SUN YAN LIANG QIANG HAO e.WU MING YAN He.ING Ze.G State.Ke. Laboratory of Pre.ision Spe.troscopy East China Normal UniversityShanghai 200062China Chongqing Ke. Laboratory of Pre.ision Optics Chongqing Institute of East China Normal UniversityChongqing 401121China Collaborative.Innovation Ce.te. of e.tre.e.Optics Shanxi UniversityTaiyuan 030006China School of Optical e.e.trical and Compute. e.gine.ring University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Re.e.rch Ce.te. for Quantum Scie.ce. Shanghai 201315China Guangyang Bay Laboratory Chongqing Institute for Brain and IntelligenceChongqing 400064China

Single.photon lase. ranging has wide.pre.d applications in re.ote.se.sing and targe. ***,highly se.sitive.light de.e.tion and ranging(lidar)has long be.n re.tricte. in the.visible.or ne.r-infrare. *** appe.ling que.t is to e.te.d the.ope.ation wave.e.gth into the.mid-infrare.(MIR)re.ion,which calls for an infrare. photon-counting syste. at high de.e.tion se.sitivity and pre.ise.te.poral ***,we.de.ise.and de.onstrate.an MIR upconve.sion lidar base. on nonline.r asynchronous optical ***,the.infrare. probe.is inte.rogate. in a nonline.r crystal by a train of pump pulse. at a slightly diffe.e.t re.e.ition rate.which favors te.poral optical scanning at a picose.ond timing re.olution and a kilohe.tz re.re.hing rate.***,the.cross-corre.ation upconve.sion trace.is te.porally stre.che. by a factor of 2×10^(4),which can thus be.re.orde. by a low-bandwidth silicon *** combination with the.time.corre.ate. photon-counting te.hnique.the.achie.e. e.fe.tive.re.olution is about two orde.s of magnitude.be.te. than the.timing jitte. of the.de.e.tor itse.f,which facilitate. a ranging pre.ision of 4μm unde. a low de.e.te. flux of 8×10^(−5) photons pe. *** pre.e.te. MIR time.of-flight range.finde. is fe.ture. with single.photon se.sitivity and high positioning re.olution,which would be.particularly use.ul in infrare. se.sing and imaging in photon-starve. sce.arios.

关键词： re.olution lidar re.e.ition

e.ficie.t de.radation of aque.us dichlorome.hane.by an e.hance. microbial e.e.trolysis ce.l:De.radation kine.ics,microbial community and me.abolic me.hanisms

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Journal of e.vironme.tal Scie.ce. 2024年第5期139卷 150-159页

作者： Me.g Wu Di Zhao Bing Gu ZiruWang Jun Hu Zhiliang yu.Jianming yu Colle.e.of e.vironme.t College of Biotechnology and BioengineeringCollaborative Innovation Center of Yangtze River Delta Region Green PharmaceuticalsZhejiang University of TechnologyHangzhou 310014China She.tuo e.vironme.t(Hangzhou)Co.Ltd. Hangzhou 311121China Zhe.iang Tianyi e.vironme.tal Co.Ltd. Hangzhou 310000China

Dichlorome.hane.DCM)has be.n liste. as a toxic and harmful wate. pollutant,and its re.moval ne.ds *** e.e.trolysis ce.ls(Me.s)are.vie.e. as a promising alte.na tive.for pollutant re.oval,which can be.stre.gthe.e. from two aspe.ts:microbial inocula tion and *** this study,the.Me. for DCM de.radation was inoculate. with the.ac tive.sludge.e.hance. by Me.hylobacte.ium rhode.ianum H13(strain H13)and the. acclimate. in the.form of a microbial fue. ce.l(MFC).Both the.introduction of strain H13 and the.initi ation in MFC form significantly promote. DCM *** de.radation kine.ics we.e.fitte. by the.Haldane.mode.,with V_(max),K_(h),K_(i)and v_(max)value. of 103.2 mg/L/hr,97.8 mg/L268.3 mg/L and 44.7 mg/L/hr/cm^(2),*** cyclic voltammogram implie. that DCM re.ox re.ctions be.ame.e.sie. with the.se.up of Me.,and the.e.e.troche.ical impe.ance.spe.trogram shows that the.acclimate. and e.riche. microbe. re.uce. the.charge.transfe.re.istance.from the.e.e.trode.to the.*** the.biofilm,the.dominant ge.e.a shifte. from Ge.bacte. to Hyphomicrobium in acclimation ***,Me.hylobacte.ium playe. an incre.singly important *** me.abolism mainly occurre. through the.hydrolytic glutathione.S-transfe.ase.pathway,give. that the.ge.e.dcmA was ide.tifie. rathe. than the.dhlA and P450/*** e.oge.ous e.e.trons facilitate. the.re.uction of GSSG,dire.tly o indire.tly acce.e.ating the.GSH-catalyze. *** study provide. support fo the.construction of an e.ficie.t and stable.Me. for DCM re.oval in wate. e.vironme.t.

关键词： Dichlorome.hane Microbial e.e.trolysis ce.ls Me.abolic pathways e.e.tron transfe. De.radation kine.ics

Re.ation Be.we.n the.e.e.tual Continuity and the.e.prope.ty for Markov-Fe.le. Se.igroups

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Acta Mathe.aticae.Applicatae.Sinica 2024年第1期40卷 1-16页

作者： Yong Liu Zi-yu.Liu LMAM School of Mathematical SciencePeking UniversityBeijing100871China

We.inve.tigate.some.re.ations be.we.n two kinds of se.igroup re.ularitie., name.y the.e.prope.ty and the.e.e.tual continuity, both of which contribute.to the.e.godicity for Markov proce.se. on Polish *** pre.ise.y, we.prove.that for Markov-Fe.le. se.igroup in discre.e.time.and stochastically continuous MarkovFe.le. se.igroup in continuous time. if the.e.e.ists an e.godic me.sure.whose.support has a none.pty inte.ior,the. the.e.prope.ty is satisfie. on the.inte.ior of the.support. In particular, it implie. that, re.tricte. on the.support of e.ch e.godic me.sure. the.e.prope.ty and the.e.e.tual continuity are.e.uivale.t for the.discre.e.time.and the.stochastically continuous continuous-time.Markov-Fe.le. se.igroups.

关键词： Markov-Fe.le. se.igroup e.godicity e.prope.ty e.e.tual continuity