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Enhancement of CH_(3)CO^(*) ad.orption by.ed.ting d.orbital states of Pd.to boost C–C bond.cleavage of ethanol eletrooxid.tion

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Science China Chemistry 2024年第2期67卷 696-704页

作者： y.chen Qin Fengqi wang Pei Liu Jiny. y. Qian wang y.o wang Guangce Jiang Lijie Liu Pengfang Zhang Xiaobiao Liu Xin Zheng y.nlai Ren Junjun Li Zhicheng Zhang College of Sciences Henan Agricultural UniversityZhengzhou450000China Tianjin Key.Laboratory.of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin300072China College of Chemistry.and.Chemical Engineering Xiamen UniversityXiamen361005China d.partment of Analy.is Sinopec Engineering Group Luoyang R&D Center of TechnologyLuoyang471000China School of Chemical and.Material Engineering Jiangnan UniversityWuxi214211China Shand.ng Provincial Key.Laboratory.of Chemical Energy.Storage and.Novel Cell Technology Liaocheng UniversityLiaocheng252000China

Improving the complete ethanol electrooxid.tion on Pd.based.cataly.ts in alkaline med.a has d.awn wid.ly.attention d.e to the high mass energy.***,the weak ad.orption energy.of CH_(3)CO^(*) on Pd.restricts the C–C bond.*** by.the molecular orbital theory.we proposed.the d.state-ed.ting strategy.to construct more unoccupied.d.states of Pd.for the enhanced.interaction with CH_(3)CO^(*) to break C–C *** expected.the red.ced.number of e_g electrons and.more unoccupied.d.states of Pd.successfully.formed.on as-prepared.porous Rh Au–Pd.Cu nanosheets(PNSs).Theoretical calculations show that the optimized.d.states of Rh Au–Pd.Cu PNS can effectively.improve the ad.orption of CH_(3)CO^(*) and.d.astically.red.ce the energy.barrier of C–C bond.cleavage,thus boosting the complete oxid.tion of *** charge ratio of C_1 pathway.on Rh Au–Pd.Cu PNSs is 51.5%,more than 2 times higher than that of Pd.*** find.ng provid.s an innovative perspective for the d.sign of highly.efficient noble-based.electrocataly.ts.

关键词： C–C bond.cleavage CH_(3)CO^(*)ad.orption unoccupied.d.states ethanol oxid.tion reaction RhAu–Pd.u porous nanosheets

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MAd.PG-d.: An Intelligent d.0}amic Task Allocation Algorithm Based.on Multi-Agent Architecture d.iven by.Prior Knowled.e

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Computer Mod.ling in Engineering & Sciences 2024年第9期140卷 2559-2586页

作者： Tengd. Li Gang wang Qiang Fu College of Air and.Missile d.fense Air Force Engineering UniversityXi’an710051China

Aiming at the problems of low solution accuracy.and.high d.cision pressure when facing large-scale d.0}amic task allocation(d.A)and.high-d.mensional d.cision space with single agent,this paper combines the d.ep reinforce-ment learning(d.L)theory.and.an improved.Multi-Agent d.ep d.terministic Policy.Grad.ent(MAd.PG-d.)algorithm with a d.al experience replay.pool and.a d.al noise based.on multi-agent architecture is proposed.to improve the efficiency.of *** algorithm is based.on the trad.tional Multi-Agent d.ep d.terministic Policy.Grad.ent(MAd.PG)algorithm,and.consid.rs the introd.ction of a d.uble noise mechanism to increase the action exploration space in the early.stage of the algorithm,and.the introd.ction of a d.uble experience pool to improve the d.ta utilization rate;at the same time,in ord.r to accelerate the training speed.and.efficiency.of the agents,and.to solve the cold.start problem of the training,the a priori knowled.e technology.is applied.to the training of the ***,the MAd.PG-d. algorithm is compared.and.analy.ed.based.on the d.gital battlefield.of ground.and.air *** experimental results show that the agents trained.by.the MAd.PG-d. algorithm have higher win rates and.average reward.,can utilize the resources more reasonably.and.better solve the problem of the trad.tional single agent algorithms facing the d.fficulty.of solving the problem in the high-d.mensional d.cision *** MAd.PG-d. algorithm based.on multi-agent architecture proposed.in this paper has certain superiority.and.rationality.in d.A.

关键词： d.ep reinforcement learning d.0}amic task allocation intelligent d.cision-making multi-agent sy.tem MAd.PG-d. algorithm

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Complicated.target recognition by.archaeal box C/d.guid. RNAs

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Science China(Life Sciences) 2024年第4期67卷 631-644页

作者： Jiay.n wang Songlin Wu Keqiong y. Key.Laboratory.of RNA Science and.Engineering CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China University.of Chinese Acad.my.of Sciences Beijing 100049China

Box C/d.RNAs guid. the site-specific formation of 2′-O-methy.ated.nucleotid.s(Nm)of RNAs in eukary.tes and.*** C/d.RNAs have been profiled.in several archaea,their targets have not been experimentally.***,we mapped.Nm in r RNAs,t RNAs,and.abund.nt small RNAs(s RNAs)and.profiled.C/d.RNAs in the crenarchaeon Sulfolobus *** targets of C/d.RNAs were assigned.by.analy.is of base-pairing interactions,in vitro mod.fication assay.,and.gene d.letion experiments,revealing a complicated.land.cape of C/d.RNA-target interactions.C/d.RNAs wid.ly.use d.al antisense elements to target ad.acent sites in r RNAs,enhancing mod.fication at weakly.bound.*** consecutive sites can be guid.d.with the same antisense element upstream of box d.or d.,a phenomenon known as d.ublespecificity.that is exclusive to internal box d.in eukary.tic C/d.*** C/d.RNAs guid. mod.fication at a single non-canonical *** stud.0}reveals the global land.cape of RNA-guid.d.2′-O-methy.ation in an archaeon and.unexpected.targeting rules employ.d.by.C/d.RNA.

关键词： C/d.RNA 2′-O-methy.ation archaea guid. RNA RNA mod.fication

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Ultra-wid. band.gap and.wave attenuation mechanism of a novel star-shaped.chiral metamaterial

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Applied.Mathematics and.Mechanics(English Ed.tion) 2024年第7期45卷 1261-1278页

作者： Shuo wang Anshuai wang y.nsen WU Xiaofeng LI y.ngtao SUN Zhaozhan ZHANG Qian d.NG G.d.Ay.LEW y.nxiang MA Qingy. LIN d.partment of Mechanics Tianjin UniversityTianjin300350China Tianjin Key.Laboratory.of Nonlinear d.0}amics and.Control Tianjin UniversityTianjin300350China State Key.Laboratory.of Metastable Materials Science and.Technology Yanshan UniversityQinhuangdao066004Hebei ProvinceChina

A novel hollow star-shaped.chiral metamaterial(SCM)is proposed.by.incorporating chiral structural properties into the stand.rd.hollow star-shaped.metamaterial,exhibiting a wid. band.gap over 1500 *** broad.n the band.gap,solid.single-phase and.two-phase SCMs are d.signed.and.simulated.which prod.ce two ultra-wid. band.gaps(approximately.5116 Hz and.6027 Hz,respectively..The main reason for the formation of the ultra-wid. band.gap is that the rotational vibration of the concave star of two novel SCMs d.ains the energy.of an elastic *** impacts of the concave angle of a single-phase SCM and.the resonator rad.us of a two-phase SCM on the band.gaps are *** the concave angle lead. to an increase in the wid.h of the wid.st band.gap,and.the wid.h of the wid.st band.gap increases as the resonator rad.us of the two-phase SCM ***,the stud.0}on elastic wave propagation characteristics involves analy.ing frequency.d.spersion surfaces,wave propagation d.rections,group velocities,and.phase ***,the analy.is focuses on the transmission properties of finite period.c *** solid.single-phase SCM achieves a maximum vibration attenuation over 800,while the wid.h of the band.gap is smaller than that of the two-phase *** metamaterials exhibit high vibration attenuation capabilities,which can be used.in wid.band.vibration red.ction to satisfy.the requirement of ultra-wid. frequencies.

关键词： metamaterial ultra-wid. band.gap wave propagation vibration suppression

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Ultra-high-temperature application of MXene: Stabilization of 2d.Ti_(3)C_(2)T_(x) for cross-scale strengthening and.toughening of 3d.TiC

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Journal of Ad.anced.Ceramics 2024年第1期13卷 1-10页

作者： Lu Liu Guobing y.ng Quanguo Jiang d.ng Wen Peng wang Meng Wu Ziy.ng Ji y.ngting Zheng Xiang wang d.partment of Materials Science and.Engineering College of Mechanics and MaterialsHohai UniversityNanjing 211100China Key.Laboratory.of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China Shenzhen Key.Laboratory.for Ad.anced.Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Center for Composite Materials and.Structures Harbin Institute of TechnologyHarbin 150001China

Transition metal carbid./nitrid. cores within MXenes make them consid.rably.useful for ultra-high-temperature ***,extensive research on Ti_(3)C_(2)T_(x) MXene has revealed.its tend.ncy.to und.rgo a phase transition to TiCy.at temperatures above 800℃d.e to high activity.of a superficial Ti atomic ***,spark plasma sintering of Ti_(3)C_(2)T_(x) and.TiC is performed.to prevent the Ti_(3)C_(2)T_(x) phase transition at temperatures up to 1900℃through the fabrication of composites at a pressure of 50 *** a focused.ion beam scanning electron microscope to separate lay.red.substances in the composites and.examining selected.area d.ffraction spots in a transmission electron microscope enabled.id.ntification of non-phase-transitioned.***-principles calculations based.on d.nsity.functional theory.ind.cated.the formation of strong chemical bond.ng interfaces between Ti_(3)C_(2)T_(x) and.TiC,which imposed.a stability.constraint on the Ti atomic lay.r at the Ti_(3)C_(2)T_(x) *** performance tests,such as three-point bend.ng and.fracture toughness analy.is,d.monstrated.that the ad.ition of Ti_(3)C_(2)T_(x) can effectively.improve the cross-scale strengthening and.toughening of the TiC matrix,provid.ng a new path for d.signing and.d.veloping two-d.mensional(2d.carbid.s cross-scale-enhanced.three-d.mensional(3d.carbid.s with the same elements rely.ng on a wid. variety.of MXenes.

关键词： MXene ultra-high-temperature phase stability interface bond.ng cross-scale strengthening and.toughening structural ceramic composites

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3d.printed.Mg-1Ca/poly.aprolactone composite scaffold. with promoted.bone regeneration

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Journal of Magnesium and.Alloy. 2024年第3期12卷 966-979页

作者： Xiao Zhao Siy. wang Feilong wang y.an Zhu Ranli Gu Fan y.ng y.ngxiang Xu d.nd.n Xia y.nsong Liu d.partment of Prosthod.ntics Peking University School and Hospital of StomatologyBeijing 100081China National Center of Stomatology National Engineering Laboratory for Digital and Material Technology of StomatologyNational Clinical Research Center for Oral DiseasesBeijing Key Laboratory of Digital StomatologyResearch Center of Engineering and Technology for Computerized Dentistry Ministry of HealthNMPA Key Laboratory for Dental MaterialsBeijing 100081China d.partment of d.ntal Materials Peking University School and Hospital of StomatologyBeijing 100081China

In bone tissue engineering,poly.aprolactone(PCL)is a promising material with good.biocompatibility.but its poor d.grad.tion rate,mechanical strength,and.osteogenic properties limit its *** this stud.0}we d.veloped.an Mg-1Ca/poly.aprolactone(Mg-1Ca/PCL)composite scaffold. to overcome these *** used.a melt blend.ng method.to prepare Mg-1Ca/PCL composites with Mg-1Ca alloy.powd.r mass ratios of 5,10,and.20 wt%.Porous scaffold. with controlled.macro-and.microstructure were printed.using the fused.d.position mod.ling *** explored.the mechanical strength,biocompatibility.osteogenesis performance,and.molecular mechanism of the Mg-1Ca/PCL *** 5 and.10 wt%Mg-1Ca/PCL composites were found.to have good.***,they.promoted.the mechanical strength,proliferation,ad.esion,and.osteogenic d.fferentiation of human bone marrow stem cells(hBMSCs)of pure *** vitro d.grad.tion experiments revealed.that the composite material stably.released.Mg_(2)+ions for a long period.it formed.an apatite lay.r on the surface of the scaffold.that facilitated.cell ad.esion and.*** tomography.and.histological analy.is showed.that both 5 and.10 wt%Mg-1Ca/PCL composite scaffold. promoted.bone regeneration bone *** results ind.cated.that the Wnt/β-catenin pathway.was involved.in the osteogenic ***,Mg-1Ca/PCL composite scaffold. are expected.to be a promising bone regeneration material for clinical *** of significance:Bone tissue engineering scaffold. have promising applications in the regeneration of critical-sized.bone ***,there remain many.limitations in the materials and.manufacturing method. used.to fabricate *** stud.0}shows that the d.veloped.Ma-1Ca/PCL composites provid.s scaffold. with suitable d.grad.tion rates and.enhanced.boneformation ***,the fused.d.position mod.ling method.allows precise control of the macroscopic morphology.and.microsc

关键词： 3d.printing Bone tissue engineering Magnesium Osteogenic Poly.aprolactone Scaffold.

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2d.Ca/Nb-based.perovskite oxid. with Ta d.ping as highly.efficient H_(2)O_(2)sy.thesis cataly.t

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Nano Research 2024年第6期17卷 4934-4942页

作者： Xingchen y.ng y.ng Gao Xiaohui Xu Wenqiang Xu d.nghui wang Bin Luo d.ng Liu Tao Liang Bin wang CAS Key.Laboratory.of Nanosy.tem and.Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China University.of Chinese Acad.my.of Sciences Beijing 100049China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnologythe University of QueenslandSt LuciaQLD 4072Australia State Key.Laboratory.of Organic–Inorganic Composites College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Hangzhou Institute for Ad.anced.Stud. University of Chinese Academy of SciencesHangzhou 310024China State Key.Lab of Silicon Materials Zhejiang UniversityHangzhou 310027China

Perovskite oxid.s(POs)are emerging as a class of highly.efficient cataly.ts for red.cing oxy.en to H_(2)*** a rich variety.of POs-based.cataly.ts have been d.veloped.by.tuning the complex composition,a highly.efficient PO cataly.t that is able to alter the reaction pathway.from a 4e−process to a 2e−process for H_(2)O_(2)prod.ction has rarely.been *** mod.fied.the structure and.composition of a Ca-and.Nb-based.PO material by.realizing a uniform two-d.mensional(2d.morphology.and.varied.Ta d.ping,resulting in the 2d.Ca_(2)Nb_(3−x)Ta_(x)O_(10)−(x=0,0.5,1,and.1.5)monolay.r *** obtained.cataly.ts exhibit a d.minant 2e−pathway.and.show exceptional H_(2)O_(2)prod.ction *** ty.ical Ca_(2)Nb_(2.5)Ta_(0.5)O_(10)−nanoflakes showed.an onset potential of 0.735 V *** hy.rogen electrod.(RHE),a remarkably.high selectivity.over 95%across a wid. range of 0.3-0.7 V,an impressively.high Farad.ic efficiency.of 94%,and.a notable H_(2)O_(2)prod.ctivity.of 1571 mmol·gcat^(−1)·h^(−1).These find.ngs highlight the great potential of 2d.perovskite oxid. nanoflakes as ad.anced.electrocataly.ts for 2e−oxy.en red.ction reaction.

关键词： perovskite oxid. H_(2)O_(2) two-electron oxy.en red.ction reaction cataly.t Ca_(2)Nb_(3-x)Ta_(x)O_(10)-nanoflakes

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Current-perpend.cular-to-plane transport properties of 2d.ferromagnetic material CrTe2

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CHINESE PHy.ICS B 2024年第9期33卷 535-539页

作者： wang, Jin Liu, y. wang, Taikun Xu, y.ngkang wang, Shuanghai He, Kun d.ng, y.feng y.n, Pengfei He, Liang Nanjing Univ Sch Elect Sci & Engn Nanjing 210023 Peoples R China Nanjing Univ State Key Lab Spintron Suzhou 215163 Peoples R China

Heterostructures of van d.r Waals (vd.) ferromagnetic materials have become a focal point in research of low-d.mensional spintronic d.vices. The current d.rection in spin valves is commonly.perpend.cular to the plane (CPP). However, the transport properties of the CPP mod. remain largely.unexplored. In this work, current-in-plane (CIP) mod. and.CPP mod. for CrTe2 thin films are carefully.stud.ed. The temperature-d.pend.nt longitud.nal resistance transitions from metallic (CIP) to semicond.ctor behavior (CPP), with the electrical resistivity.of CPP increased.by.five ord.rs of magnitud.. More importantly. the transport properties of the CPP can be categorized.into a single-gap tunneling-through mod.l with the activation energy.(E-a) of similar to 1.34 meV/gap at 300-150 K, the variable range hopping mod.l with a linear negative magnetoresistance at 150-20 K, and.weak localization region with a nonlinear magnetic resistance below 20 K. This stud.0}explores the vertical transport in CrTe2 materials for the first time, contributing to und.rstand.its unique properties and.to pave the way.for its potential in spin valve d.vices.

关键词： 2d.vd. CrTe2 current-perpend.cular-to-plane negative magnetic resistance

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Novel 2d.bifunctional lay.red.rare-earth hy.roxid.s@GO cataly.t as a functional interlay.r for improved.liquid.solid.conversion of poly.ulfid.s in lithium-sulfur batteries

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Chinese Chemical Letters 2024年第5期35卷 434-440页

作者： Haod.ng wang Xiaoxu Lai Chi Chen Pei Shi Houzhao Wan Hao wang Xingguang Chen d.n Sun CAS Key.Laboratory.of d.sign and.Assembly.of Functional Nanostructures and.Fujian Provincial Key.Laboratory.of Nanomaterials Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry.and.Materials Fujian Normal UniversityFuzhou 350007China Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021China School of Microelectronics Hubei UniversityWuhan 430062China Xiamen Key.Laboratory.of Rare Earth Photoelectric Functional Materials Xiamen 361021China

The d.trimental“shuttle effect”of lithium poly.ulfid.s(LiPSs)together with sluggish multi-ord.r reaction kinetics are the main d.awbacks hind.ring lithium-sulfur(Li-S)batteries from commercial ***,we first propose the implementability.of lay.red.rare-earth hy.roxid.s(LREHs)in Li-S batteries to optimize electrochemical *** this work,a two-d.mensional(2d.rare-earth-based.composite constructed.by.the lay.red.gad.linium hy.roxy.chlorid.[Gd.(2)(OH)_(5)(H_(2)O)_(n)]Cl nanoplates(LGd. NPs)and.graphene oxid.(GO)was d.signed.as a sulfur immobilizer for Li-S *** the experimental results and.d.nsity.functional theory.d.T)calculations,it is revealed.that the LGd.@GO composite not only.provid.s a strong anchoring of the intermed.ates d.ring cy.ling,but also acts as an effective cataly.t to accelerate the liquid.solid.conversion of *** Li-S batteries assembled.by.LGd.@GO mod.fied.separators d.livered.a superior rate performance with a specific capacity.of 605.34 mAh/g at 5 C,as well as excellent cy.le stability.with a d.cay.rate of 0.087%over 500 cy.les at 2 *** stud.0}provid.d.a d.ep und.rstand.ng of the mechanism to suppress the“shuttle effect”by.the LREHs,and.a guid. to d.sign effective functional interlay.rs for high-performance Li-S batteries with excellent electrocataly.ic activity.

关键词： Lithium-sulfur batteries Functional separator Lay.red.rare-earth hy.roxid.s Shuttle effect Ad.orption Cataly.is

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Reorganization of 3d.genome architecture provid.s insights into pathogenesis of early.fatty.liver d.sease in lay.ng hens

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Journal of Animal Science and.Biotechnology 2024年第3期15卷 1086-1100页

作者： y.nli Liu Zhuqing Zheng Chaohui wang y.meng wang Xi Sun Zhouzheng Ren Xin y.ng Xiaojun y.ng College of Animal Science and.Technology Northwest A&F UniversityYangling 712100China Institute of Agricultural Biotechnology Jingchu University of TechnologyJingmen 448000China

Background.Fatty.liver d.sease causes huge economic losses in the poultry.ind.stry.d.e to its high occurrence and.lethality.***-d.mensional(3d.chromatin architecture takes part in d.sease processing by.regulating tran-scriptional *** stud.0}is carried.out to investigate the alterations of hepatic 3d.genome and.H3K27ac profiling in early.fatty.liver(FLS)and.reveal their effect on hepatic transcriptional reprogramming in lay.ng *** Results show that FLS mod.l is constructed.with obvious phenoty.es includ.ng hepatic visible lipid.d.posi-tion as well as higher total trigly.erid. and.cholesterol in serum.A/B compartment switching,topologically.associat-ing d.main(TAd.and.chromatin loop changes are id.ntified.by.high-throughput/resolution chromosome conforma-tion capture(HiC)*** genes of these alternations in hepatic 3d.genome organization significantly.enrich pathway. related.to lipid.metabolism and.hepatic d.mage.H3K27ac d.fferential peaks and.d.fferential expres-sion genes(d.Gs)id.ntified.through RNA-seq analy.is are also enriched.in these ***,certain d.Gs are found.to correspond.with changes in 3d.chromatin structure and.H3K27ac bind.ng in their *** motif analy.is reveals that cand.d.te transcription factors are implicated.in regulating transcriptional ***,d.sturbed.folate metabolism is observed.as evid.nced.by.lower folate levels and.altered.enzy.e *** Our find.ngs establish a link between transcriptional reprogramming changes and.3d.chromatin struc-ture variations d.ring early.FLS formation,which provid.s cand.d.te transcription factors and.folate as targets for FLS prevention or treatment.

关键词： 3d.chromatin architecture Fatty.liver d.sease Folate H3K27ac profiling Transcription reprogramming

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