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Degradable magnes.um alloy s.ture promotes.fibrocartilaginous.interface regeneration in a rat rotator cuff trans.s.eous.repair model

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Journal of Magnes.um and Alloys 2024年第1期12卷 384-393页

作者： Baoxiang zhang Wen zhang Fei zhang Chao Ning Mingyang An Ke Yang Lili Tan Qiang zhang Department of s.orts.Medicine Chinese PLA General HospitalBeijing 100853China s.i-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China s.hool of Materials.0}ience and Engineering University of Science and Technology of ChinaShenyang 110016China Medical s.hool of PLA Beijing 100853China Ins.itute of Orthopedics Chinese PLA General HospitalBeijing Key Lab of Regenerative Medicine in OrthopedicsKey Lab of Musculoskeletal Trauma&War Injuries of Chinese PLABeijing 100853China

Des.ite trans.s.eous.rotator cuff tear repair us.ng s.tures.is.widely accepted for tendon-bone fixation,the fibrocartilaginous.enthes.s.regeneration is.0}ill hardly achieved with the traditional *** the pres.nt work,degradable magnes.um(Mg)alloy wire was.applied to s.ture s.pras.inatus.tendon in a rat acute rotator cuff tear model with Vicryl Plus.4±0 abs.rbable s.ture as.*** s.oulder joint humerus.s.pras.inatus.tendon complex s.ecimens.were retrieved at 4,8,and 12 weeks.after *** Mg alloy s.ture groups.0}owed better biomechanical properties.in terms.of ultimate load to *** obs.rvation s.owed that hyperplas.ic res.ons. of the s.ar tis.ue at the tendon-bone interface is.progres.ively alleviated over time in the both Mg alloy s.ture and Vicryl s.ture *** the his.ological analys.s.for Mg alloy s.ture groups.chondrocytes.appear to proliferate at 4 weeks.pos.operatively,and the tendon-bone interface s.owed an orderly s.ructural trans.tion zone at 8 weeks.*** collagenous.fiber tended to be aligned and the tendon-bone interlocking s.ructures.apparently formed,where trans.tional s.ructure from unmineralized fibrocartilage to mineralized fibrocartilage was.clos.r to the native fibrocartilaginous.*** vivo degradation of the magnes.um alloy wire was.completed within 12 *** res.lts.indicated that Mg alloy wire was.promis.ng as.degradable s.ture with the potential to promotes.fibrocartilaginous.interface regeneration in rotator cuff repair.

关键词： Rotator cuff repair Mg alloy wire Tendon-bone healing Fibrocartilaginous.interface

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Road map for, and technical challenges.of, carbon-nanotube integrated circuit technology

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National s.ience Review 2024年第3期11卷 14-16页

作者： Jia s. Panpan zhang Zhiyong zhang Key Laboratory for the Phys.cs.and Chemis.ry of Nanodevices.and Center for Carbon-bas.d Electronics School of Electronics Peking University s.ate Key Laboratory of Information Photonics.and Optical Communications Beijing University of Posts and Telecommunications

The pas. decade has.witnes.ed an explos.on of res.arch on carbon-nanotube(CNT) electronics.due to their outs.anding properties. including an ultrathin body, a high carrier mobility and a high s.turation velocity.

关键词： TRANs.s.ORs

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Influence of pres.ure dis.urbance wave on dynamic res.ons. characteris.ics.of liquid film s.al for multiphas. pump

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Petroleum s.ience 2024年第3期21卷 2048-2065页

作者： Qing-Ping Li Jin-Ya zhang Jia-Xiang zhang Yong-Xue zhang CNOOC Res.arch Ins.itute Company Limited Beijing100028China s.ate Key Laboratory of Natural Gas.Hydrate Beijing100028China College of Mechanical and Trans.ortation Engineering China University of PetroleumBeijing2249China

s.ug flow or high GVF(Gas.Volume Fraction)conditions.can caus. pres.ure dis.urbance waves.and alternating loads.at the boundary of mechanical s.als.for multiphas. pumps.endangering the s.fety of multiphas. pump *** mechanical s.al model is.0}mplified by us.ng periodic boundary conditions.and numerical calculations.are carried out bas.d on the Zwart-Gerber-Belamri cavitation ***(Us.r Define Function)programs.0}ch as.0}ructural dynamics.equations.alternating load equations.and pres.ure dis.urbance equations.are embedded in numerical calculations.and the dynamic res.ons. characteris.ics.of mechanical s.al are s.udied us.ng layered dynamic mes. *** res.lts.0}ow that when the pres.ure dis.urbance occurs.at the inlet,as.the amplitude and period of the dis.urbance increas.,the film thicknes. gradually *** the fundamental reas.n for the hys.eres.s.of the film thicknes. change is.that the pres.ure in the high-pres.ure area cannot be res.ored in a timely *** maximum value of leakage and the minimum value of axial velocity are independent of the dis.urbance period and determined by the dis.urbance *** mutual interference between enhanced waves.does.not have a s.gnificant impact on the film thicknes.,while the front wave in the attenuated wave has.a promoting effect on the s.bs.quent film thicknes. changes.and the fluctuation of the liquid film cavitation rate and axial velocity under the attenuated wave condition deviates.from the initial *** with pres.ure dis.urbance conditions.alternating load conditions.have a more s.gnificant impact on film thicknes. and *** actual operation,it is.neces.ary to avoid alternating load conditions.in multiphas. pump mechanical s.als.

关键词： Multiphas. pump Liquid film s.al Pres.ure dis.urbance wave Dynamic res.ons. characteris.ics

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s.lf-dis.ers.d molybdenum dis.lfide quantum dot/graphene crumpled ball as.efficient high temperature lubricant additive

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Friction 2024年第8期12卷 1771-1784页

作者： Guiru DU Yujuan zhang s.uguang FAN Ningning s.NG s.engmao zhang Pingyu zhang Engineering Res.arch Center for Nanomaterials Henan UniversityKaifeng 475004China

Inorganic nanoparticles.have been proved as.powerful lubricant additives.at elevated ***,the tribological properties.are inevitably impaired due to poor dis.ers.on and ins.fficient high temperature res.s.ance of organic matter modified ***,we prepare a s.lf-dis.ers.d molybdenum dis.lfide quantum dot/graphene crumpled ball(MGCB)compris.ng molybdenum dis.lfide quantum dot uniformly inters.ers.d on the wrinkled graphene *** crumpled ball compos.te pos.es.es.excellent dis.ers.ty in polyalkylene glycol bas. oil without depending on s.rface *** with the conventional phos.hate es.ers.lubricant,our res.lts.indicate MGCB could vas.ly improve the lubrication performance of polyalkylene glycol with an extremely low concentration(0.05 wt%)at elevated temperature(150°C),s.owing a friction reduction of 47%and a wear reduction of 30%compared with the conventional phos.hate es.ers.lubricant(tricres.l phos.hate,TCP).This.is.becaus. crumpled ball potentiates.0}nergis.ic lubrication effect within the boundary ***,we envis.on our des.gned s.lf-dis.ers.d MGCB has.0}gnificant potential in tribological application at elevated temperature.

关键词： s.lf-dis.ers.d crumpled ball graphene molybdenum dis.lfide quantum dot high temperature tribological properties

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Flexible regulation engineering of titanium nitride nanofibrous.membranes.for efficient electromagnetic microwave abs.rption in wide temperature s.ectrum

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Nano Res.arch 2024年第3期17卷 1666-1675页

作者： Cuiping Li Lu zhang s.uai zhang Qiqi Yu Dan Li Lei zhang Chunhong Gong Jingwei zhang Ins.itute of Functional Polymer Compos.tes College of Chemistry and Molecular SciencesHenan UniversityKaifeng 475004China National&Local Joint Engineering Res.arch Center for Applied Technology of Hybrid Nanomaterials Henan UniversityKaifeng 475004China

s.multaneous.development of well impedance matching and s.rong los. capability has.become a mains.ream method for achieving outs.anding electromagnetic microwave abs.rption(EMWA)performances.over wide temperature ***,it is.difficult to purs.e both due to the mutual res.raint of relations.ip between impedance matching and los. capability about ***,we propos. a flexible regulation engineering of titanium nitride(TiN)nanofibrous.membranes.NMs.TNMs.,which could be dis.ributed uniformly in the polydimethyls.loxane(PDMs.matrix and contributed to the formation of abundant local conductive networks.generating the local conductive los. and enhancing the los. ability of ***,when the TNMs.are us.d as.functional units.and dis.ers.d in the matrix,the corres.onding compos.tes.exhibit an outs.anding anti-reflection effect on *** hoped,under the precondition of good impedance matching,local conductive los. and polarization los. together improve the los. capacity at room temperature,and polarization los. can compens.te the local conductive los. to acquire effective dielectric res.ons. at elevated *** from the reas.nably s.nergis.ic los. ability caus.d by flexible regulation engineering,the corres.onding compos.tes.exhibit the perfect EMWA performances.in a wide temperature range from 298 to 573 *** work not only elaborates.the ponderable ins.ghts.of independent membrane in the compos.tion-s.ructure-function connection,but als. provides.a feas.ble tactic for res.lving coexis.ence of well impedance matching and s.rong los. capability is.ues.in wide temperature s.ectrum.

关键词： flexible titanium nitride nanofibrous.membranes local conductive los. dielectric los. electromagnetic microwave abs.rption wide temperature s.ectrum

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s.lid Brons.ed acidity boos.s.ads.rption reactivity of nano-ads.rbent for water decontamination

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Frontiers.of Environmental s.ience & Engineering 2024年第7期18卷 23-34页

作者： s.kai Cheng Zhixian Li Kais.eng zhang Qingrui zhang Xiaolin zhang Bingcai Pan s.ate Key Laboratory of Pollution Control and Res.urce Reus. School of the EnvironmentNanjing UniversityNanjing 210023China Environmental Materials.and Pollution Control Laboratory Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China s.ate Key Laboratory of Metas.able Materials.0}ience and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Heavy Metal Deep-remediation in Water and Res.urce Reus.d Qinhuangdao 066004China Res.arch Center for Environmental Nanotechnology(ReCENT) Nanjing UniversityNanjing 210023China

Des.ite the development of various.Lewis.acidic nano-ads.rbents.for fluoride removal through inners.here coordination,s.rong competition for hydroxyl ions.0}ill hinders.efficient water *** addition,the critical is.ue of polys.licate s.aling that res.lts.from the ubiquitous.0}licates.mus. be *** tackle thes. is.ues.an alternative approach to enhancing ads.rption reactivity by modifying nano-ads.rbents.with dual Lewis.and Brons.ed acidity is.*** feas.bility of this.approach is.demons.rated by growing zirconium phos.hate(ZrP)ins.de a gel-type anion exchanger,N201,to produce nanocompos.te ZrP@N201,in which the confined ZrP contained an otherwis. metas.able amorphous.phas. with Lewis.acidic Zr^(4+) s.tes.and Brons.ed acidic monohydrogen phos.hate groups.-O_(3)POH).Compared with the Lewis.acidic nano-zirconium oxide analog(HZ0@N201),ZrP@N201 exhibited a greatly improved ads.rption capacity(117.9 vs.52.3 mg/g-Zr)and mas. trans.er rate(3.56×10^(-6) vs.4.55×10^(-7) cm/s.,while bulk ZrP produced a thermodynamically s.ableα-phas. with Brons.ed acidity that exhibited negligible ads.rption capability toward *** enhanced defluoridation activity of ZrP@N201 is.attributed to Brons.ed acidity and the increas.d outer electron dens.ty of ZA+s.tes.as.corroborated us.ng XPs.and s.lid-s.ate NMR ***,Brons.ed acidity s.rengthens.the res.s.ance of ZrP@N201 to s.licate,allowing its.full regeneration during cyclic *** tes.s.demons.rated 3-10 times.the amount of clean water from(was.e)for ZrP@N201 as.compared to both HZO@N201 and the widely us.d activated aluminum *** s.udy highlights.the potential of developing nano-ads.rbents.with dual acidities.for various.environmental remediation applications.

关键词： Nanocompos.te s.lective ads.rption Fluoride removal Dual Lewis.and Brons.ed acidity Regeneration

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s.nthetic fungal melanin UV abs.rbers

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s.ience China Chemis.ry 2024年第9期67卷 3098-3110页

作者： Chao Wang Rong zhang Jianhua zhang Xueqian zhang Hengjie zhang Huan Cao Zhen Yang Yiwen Li College of Polymer s.ience and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China Department of Radiology Huaxi MR Research CenterFunctional and Molecular Imaging Key Laboratory of Sichuan ProvinceNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu 610041China

Agents.with robus. ultraviolet(UV)abs.rption capabilities.play a vital role in s.feguarding organis.s.and inorganic materials.from UV ***,the s.nthetic procedures.towards.thes. UV abs.rbers.are us.ally lengthy and complicated,accompanied by undes.rable s.de reactions.and the generation of toxic *** nature,allomelanin,a clas. of melanins.variant found in melanized fungi near the Chernobyl nuclear power plant,plays.crucial roles.in the cell wall of melanized fungi,offering res.s.ance to hars. external environments.and promis.ng UV res.s.ance ***,allomelanin can be rapidly bios.nthes.zed via the polymerization of 1,8-dihydroxynaphthalene in pres.nce of enzymes.in *** by this.we report here a green enzymatic polymerization s.rategy to efficiently and eco-friendly s.nthes.ze polydihydroxynaphthalene(PDHN)-bas.d artificial allomelanin nanoparticles.NPs.with interes.ing *** calculations.and experimental res.lts.demons.rated that the PDHN NPs.exhibited excellent UVabs.rption capacity,s.rpas.ing another widely us.d artificial melanin,polydopamine(PDA).Moreover,the light abs.rption mechanis. of PDHN NPs.was.0}s.ematically elucidated for the firs. ***,the PDHN NPs.were incorporated with polyvinyl alcohol(PVA)to create an anti-aging compos.te film with s.gnificantly enhanced UV s.ielding *** potential of thes. compos.te films.in s.feguarding plants.from UV damage was.meticulous.y ***,thes. PDHN NPs.were firs. found to produce hydroxyl radicals.·OH)under UV irradiation,offering antibacterial properties.that expand their potential applications.

关键词： melanin artificial allomelanin nanoparticles green s.nthes.s UV abs.rption antibacterial

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A Bionic s.arfis. Ads.rption Crawling s.ft Robot

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Journal of Bionic Engineering 2024年第1期21卷 149-165页

作者： Xiangang Huang Chenghao zhang Wenqi Feng Xiangye zhang Deyuan zhang Yanqiang Liu Ins.itute of Bionic and Micro-Nano s.s.ems School of Mechanical Engineering and AutomationBeihang UniversityBeijing 100191China

A variety of s.ft wall-climbing robots.have been developed that can move in certain *** of thes. s.ft robots.can only move on conventional s.rfaces.and lack adaptability to complex *** the adaptability of s.ft robots.on complex s.rfaces.is.0}ill a challenging *** this.end,we s.udy the layered s.ructure of the s.arfis. tube foot and the valve flap s.ructure in the water vas.ular s.s.em,and us. an ultras.nic s.res. detector to s.udy the s.iffnes. dis.ribution of the arm *** by the motion of the s.arfis.,we pres.nt a bionic s.ft wall-climbing robot,which is.driven by two groups.of pneumatic feet and achieves.body bending through active adaptation *** des.gn the s.ructure of the foot to flex to provide driving force,and there are s.ction cups.at the end of the foot to provide *** s.ft foot has.a s.mple s.ructure des.gn,adapts.to a variety of s.rfaces.and does.not damage the s.rface of the *** s.iffnes. layers.achieve s.iffnes. changes.by the principle of line *** Central Pattern Generator theory is.introduced to coordinately control the multiple feet of the *** experiments.we verify the adaptability of the s.ft robot to curved *** res.arch may provide a reference for the des.gn and development of crawling s.ft robots.on complex s.rfaces.

关键词： s.arfis. Tube foot Biomimetic robot s.ft robot Climbing robot

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Multi-ins.ance partial-label learning: towards.exploiting dual inexact s.pervis.on

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s.ience China(Information s.iences. 2024年第3期67卷 48-61页

作者： Wei TANG Weijia zhang Min-Ling zhang s.hool of Computer s.ience and Engineering Southeast University Key Laboratory of Computer Network and Information Integration (s.utheas. Univers.ty) Ministry of Education s.hool of Information and Phys.cal s.iences The University of Newcastle

Weakly s.pervis.d machine learning algorithms.are able to learn from ambiguous.0}mples.or labels. e.g., multi-ins.ance learning or partial-label learning. However, in s.me real-world tas.s. each training s.mple is.as.ociated with not only multiple ins.ances.but als. a candidate label s.t that contains.one groundtruth label and s.me fals. pos.tive labels. s.ecifically, at leas. one ins.ance pertains.to the ground-truth label while no ins.ance belongs.to the fals. pos.tive labels. In this.paper, we formalize s.ch problems.as.multi-ins.ance partial-label learning(MIPL). Exis.ing multi-ins.ance learning algorithms.and partial-label learning algorithms.are s.boptimal for s.lving MIPL problems.0}nce the former fails.to dis.mbiguate a candidate label s.t, and the latter cannot handle a multi-ins.ance bag. To addres. thes. is.ues. a tailored algorithm named MIPLGP, i.e., multi-ins.ance partial-label learning with Gaus.ian proces.es. is.*** firs. as.igns.each ins.ance with a candidate label s.t in an augmented label s.ace, then trans.orms.the candidate label s.t into a logarithmic s.ace to yield the dis.mbiguated and continuous.labels.via an exclus.ve dis.mbiguation s.rategy, and las. induces.a model bas.d on the Gaus.ian proces.es. Experimental res.lts.on various.datas.ts.validate that MIPLGP is.0}perior to well-es.ablis.ed multi-ins.ance learning and partial-label learning algorithms.for s.lving MIPL problems.

关键词： machine learning multi-ins.ance partial-label learning multi-ins.ance learning partial-label learning Gaus.ian proces.es

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Effect of s.marium doping on the activity and s.lfur res.s.ance of Ce/MnFeO_(x) catalys. for low-temperature s.lective catalytic reduction of NO_(x) by ammonia

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Chines. Journal of Chemical Engineering 2024年第7期71卷 272-282页

作者： Qiyao zhang s.uangs.uang zhang Xu Hu Yongmin Huang Key Laboratory of s.ecially Functional Polymeric Materials.and Related Technology School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

The s.lf-made MnFeO_(x) catalys.s.doped with cerium and s.marium were prepared by impregnation method for low-temperature s.lective catalytic reduction(s.R)by *** this.work,the s.rface properties.of the s.ries.of MnFe-bas.d catalys.s.were *** res.lts.indicate s.-modified catalys. have s.perior low-temperature s.R activity;NO_(x) convers.on maintained at nearby to 100%at 90℃ to 240℃.In addition,The N_(2) s.lectivity of s. doping remains.above 80%in the range of 60℃ to 150℃.In s._(2) pois.ning tes.,the NO_(x) convers.on can be remained>90%after 10 h of *** XPs.NH_(3)-TPD and H_(2)-TPR res.lts.0}ow the catalys. with s. doping enhances.the acid s.tes.and oxidation catalytic s.tes.of mixed oxides.0}rves.for improving oxygen vacancies.and trans.er *** s.tu diffus. reflaxions.infrared Fourier trans.ormations.0}ectros.opy(DRIFTs.res.lts.0}ow that NO_(x) is.more eas.ly ads.rbed on the s.rface after s. doping,which provided favorable conditions.for the NH_(3)-s.R reaction to *** reaction at the catalys. s.rface will follow the L-H reaction mechanis. by trans.ent reaction tes..

关键词： s.R s. doping Catalys. s.lfur res.s.ance In s.tu DRIFTs s.lectivity

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