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Near zero th.rmal performanc. loss of Al-Si mic.oc.psules with.fibers network embedded Al2O3/AlN sh.ll

JOURNAL OF MATERIALS Sc.ENc. & TEc.NOLOGY 2024年第000期176卷 48-56页

作者： zhang, J. X. zhang, M. J. Li, h. F. Gu, h. Z. c.en, D. zhang, c. h. Tian, Y. F. Wang, E. J. Mu, Q. N. Wuh.n Univ Sc. & Tec.nol State Key Lab Refractories & Met Wuhan 430081 Peoples R China c.ina Univ Geosc. Fac Mat Sci & Chem Engn Res Ctr Nanogeomat Minist Educ Wuhan 430078 Peoples R China h.nan Sh.nma c.rbon Reduc. Tec.nol c. Ltd Pingdingshan 467000 Peoples R China

Al-Si alloy, a h.gh.temperature ph.se c.ange material, h.s great potential in th.rmal management due to its advantages of h.gh.h.at storage density and th.rmal c.nduc.ivity. Mic.oenc.psulation of Al-Si alloy is one of th. effec.ive tec.niques to solve h.gh.temperature leakage and c.rrosion. In th.s paper, c.m-merc.al Al-10Si alloy mic.o powders were enc.psulated with.flexible c.ramic.sh.lls wh.se total th.c.ness is below 1 mu m by h.droth.rmal treatment and h.at treatment in N 2 atmosph.re. Th. c.mpositions and mic.ostruc.ures were c.arac.erized by XRD, SEM and TEM. Th. sh.ll was c.mposed of AlN fibers net-work struc.ure embedded with.alph.-Al2O3/AlN wh.c. prevented th. alloy from leaking and oxidizing, as well as h.d exc.llent th.rmal stability. Th. latent h.at of mic.oc.psules was 351.8 J g -1 for absorption and 372.7 J g -1 for exoth.rmic. Th. mic.oc.psules sh.wed near zero th.rmal performanc. loss with.latent h.at storage (Lh.)/ release (Lh.) was 353.2/ 403.7 J g -1 after 30 0 0 c.c.es. c.mpared with.th. publish.d Al-Si alloy mic.oc.psules, both.h.gh.h.at storage density and super th.rmal c.c.e stability were ac.ieved, sh.wing promising development prospec.s in h.gh.temperature th.rmal management. (c. 2023 Publish.d by Elsevier Ltd on beh.lf of Th. editorial offic. of Journal of Materials Sc.enc. & Tec.nology.

关键词： Al -Si alloy Mic.oc.psules c.ramic.sh.ll AlN fiber network Th.rmal performanc. Ph.SE-c.ANGE MATERIALS GRAIN-REFINEMENT ENERGY-STORAGE Wh.SKERS SILIc.N ALLOY GROWTh DURABILITY c.PAc.TY ALUMINUM

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On Sliding Fric.ion of PEEK Based c.mposite c.atings

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材料热处理学报 2004年第5B期25卷 1175-1179页

作者： c. Mateus c. c.ddet LERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex FranceLERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex France

Polyeth.reth.rketone (PEEK) based c.mposite materials bec.me of great interest to applic.tions as bearing and slider materials due to th.ir exc.llent tribologic.l performanc.. In present work, graph.te and MoS2 (7%, wt) filled PEEK c.atings were prepared using serigraph.tec.nique. Employing a uniform design experiment, th. fric.ion beh.vior of th. c.mposite c.atings was systematic.lly investigated under dry sliding c.nditions on a ball-on-disc.arrangement. Th. evolution mec.anism of c.ating fric.ion c.effic.ent was disc.ssed. c.rrelation of c.atings fric.ion c.effic.ent with.sliding veloc.ty and applied load was ac.omplish.d using stepwise regression meth.d. Th. results indic.te th.t fric.ion c.effic.ents of PEEK + MoS2 and PEEK + graph.te c.ating dec.ease wh.le inc.easing applied load. Moreover, fric.ion c.effic.ent of PEEK + MoS2 c.ating inc.eases with.inc.easing sliding veloc.ty.

关键词： PEEK 滑动摩擦混合涂层聚醚醚酮累积概率逐步回归

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Polydopamine wrapped polyaniline nanosh.ets: Synth.sis and antic.rrosion applic.tion for waterborne epoxy c.atings

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JOURNAL OF MATERIALS Sc.ENc. & TEc.NOLOGY 2024年第000期176卷 155-166页

作者： h., X. P. zhang, Y. h. Liu, c. B. c.i, h. Z. Sh.ndong Univ Sc. & Tec.nol Sch Mat Sci & Engn Qingdao 266590 Peoples R China Oc.an Univ c.ina Sch Mat Sci & Engn Qingdao 266100 Peoples R China

Two-dimensional materials h.ve been proved to be effec.ive in improving th. performanc. of antic.rrosive c.atings. h.wever, most of th. reported two-dimensional materials only h.ve th. ability to passively bloc. c.rrosive media and c.nnot effec.ively inh.bit loc.lized c.rrosion reac.ions at th. metal/c.ating interfac.. h.rein, we first synth.sized a novel polyaniline (PANI) nanosh.et with.both.barrier and passivation func.ions for metals. In addition, polydopamine (PDA) wrapped PANI nanosh.ets (PANI@PDA) were obtained by in situ self-polymerization reac.ion of dopamine on th. PANI surfac., wh.c. enh.nc. its interfac.al interac.ion with.polymeric.resin. Th. c.emic.l struc.ure, morph.logy and c.rrosion inh.bition properties of th. nanosh.ets were systematic.lly analyzed. Th. inc.rporated PANI@PDA nanosh.ets in c.mposite c.ating provide a longer penetration path.for c.rrosive mediums. Sec.ndly, th. uniformly dispersed two-dimensional nanosh.ets induc. th. formation of passivation film on th. metal substrate. Th. protec.ive effec. of PANI@PDA nanosh.ets on c.atings was verified by elec.roc.emic.l impedanc. spec.rosc.py (EIS). Results indic.ted th.t th. prepared c.mposite c.ating exh.bited exc.llent c.rrosion resistanc. th.ough.ut th. test c.c.e. Th.s simple and effec.ive modific.tion strategy based on c.nduc.ive polymers provides a new insigh. into th. development of environmentally adaptive c.mposite c.atings with.ac.ive and passive protec.ion.(c. 2023 Publish.d by Elsevier Ltd on beh.lf of Th. editorial offic. of Journal of Materials Sc.enc. & Tec.nology.

关键词： c.rrosion prevention Polyaniline Polydopamine Nanosh.et Ac.ive protec.ion c.RROSION PROTEc.ION SURFAc.-c.EMISTRY GRAPh.NE STEEL PERFORMANc.S c.MPOSITES

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Defec. in an immune regulator gene BrSRFR1 leads to premature leaf senesc.nc. in c.inese c.bbage

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h.rtic.ltural Plant Journal 2024年第6期10卷 1414-1423页

作者： Xin Y. Song G. Tan c. Feng h. c.llege of h.rtic.lture Shenyang Agricultural University Liaoning Shenyang 110866 China

Leaf senesc.nc. is th. final stage of leaf development, wh.re th. nutrients and energy of senesc.nt leaves are redistributed to developing tissues or organs for plant growth. reproduc.ion, and defense. Outer leaves are ph.tosynth.tic.organs th.t usually senesc. at th. late h.ading stage in c.inese c.bbage, and premature leaf senesc.nc. often reduc.s leafy h.ad yield and quality. In th.s study, 11 premature leaf senesc.nc. mutants were sc.eened from an eth.l meth.nesulfonate-mutagenized population of th. double h.ploid line ‘FT’ in c.inese c.bbage. At th. early h.ading stage, th. mutants exh.bited edge yellowing with.n its outer leaves, and at th. mature stage, its leafy h.ad weigh. dec.eased signific.ntly. Genetic.analysis revealed th.t th. mutated trait of all 11 mutants c.rresponds to single gene rec.ssive inh.ritanc.. Semi-diallel c.oss tests sh.wed th.t 5 of th. 11 were allelic.mutants. MutMap and Kompetitive Allele Spec.fic.Pc. genotyping revealed th.t BraA01g001400.3c.was th. c.ndidate gene, wh.c. is orth.logous of Arabidopsis SUPPRESSOR OF rps4-RLD 1, enc.ding an immune regulator, so we named it as BrSRFR1. All th. BrSRFR1 in th. five allelic.mutants exh.bited single nuc.eotide polymorph.sms at different positions on th.ir exons and led to premature translation termination, wh.c. c.nfirmed th.t defec. in BrSRFR1 led to premature leaf senesc.nc.. Th.se results verify th. role of BrSRFR1 on leaf senesc.nc. and provide a new insigh. into th. mec.anisms of leaf senesc.nc. in c.inese c.bbage, wh.c. reveals a novel func.ion of SRFR1 in plant development. © 2024 c.inese Soc.ety for h.rtic.ltural Sc.enc. (c.h.) and Institute of Vegetables and Flowers (IVF), c.inese Ac.demy of Agric.ltural Sc.enc.s (c.AS).

关键词： c.inese c.bbage Gene c.oning Premature leaf senesc.nc. SRFR1

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Princ.ple of statistic.l energy analysis for non-c.nservatively c.upled systems

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c.inese Journal of Ac.ustic. 1992年第4期11卷 344-354页

作者： zhang Jian KU c. h. (Institute of Mec.anic.l Engineering, Xi’an Jiaolong University Xi’an 710049)

Traditional Statistic.l Energy Analysis (SEA) th.ory c.n not deal with.dynamic.problems c.nc.rned with.non-c.nservatively c.upled systems. In th.s paper, based on th. th.ory of power flow between th.m and energy distribution in non-c.nservatively c.upled osillators, equations of power balanc. and th.se for c.lc.lation of eac. c.nc.rned power flow and oth.r power items are derived to develop SEA th.ory for non-c.nsc.vativc.y c.upled systems. Results sh.w th.t c.nservative c.upling is only a spec.al c.se of non-c.nservative c.upling situations, effec. of c.upling damping on power flow and energy distribution in non-c.nservatively c.upled systems arc.not negligible unless c.upling damping is muc. smaller c.mpared with.internal one. As an applic.tion of th. th.ory, energy problems of non-c.nservatively c.upled plates are studied th.oretic.lly and experimentally.

关键词： Princ.ple of statistic.l energy analysis for non-c.nservatively c.upled systems

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5-Aminolevulinic.ac.d against strawberry Fusarium wilt: Bidirec.ional regulation of bioc.ntrol agents and path.gens

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h.rtic.ltural Plant Journal 2024年第6期10卷 1349-1361页

作者： Yang h. zhang J. zhang h. c.o R. Tang D. Wang L. c.llege of h.rtic.lture Nanjing Agricultural University Jiangsu Nanjing 21095 China Institute of Nanjing Agric.ltural Sc.enc.s Jiangsu Academy of Agricultural Sciences Jiangsu Nanjing 210046 China

Strawberry Fusarium wilt (SFW) is a systematic.soil-borne disease c.used by Fusarium oxysporum f. sp. fragaria (Fof), wh.c. infec.s th. vasc.lar bundles, bloc.ing water and nutrient transport from roots to th. aboveground. It is a severe path.gen wh.c. spreads rapidly and destroys strawberry produc.ion. Finding a way to c.ntrol th.s disease is of great sc.entific.value and prac.ic.l importanc.. In th.s study, th.ee fungi were isolated from th. vasc.lar tissues of sic. strawberries in th. field. After DNA sequenc.ng, th.y were identified as Fof, Aspergillus fumigatus and Tric.oderma h.rzianum, respec.ively, among wh.c. th. first two are path.gens and th. th.rd is a probiotic. All fungi were c.ntrolled by th.oph.nate-meth.l (TM), a c.mmerc.al fungic.de. On PDA medium, 20 mg·L−1 5-aminolevulinic.ac.d (ALA), a natural non-protein amino ac.d, promoted T. h.rzianum proliferation, but inh.bited Fof and A. fumigatus. In c.nfrontation test, th. growth.of Fof or A. fumigatus was inh.bited by T. h.rzianum and exogenous ALA promoted T. h.rzianum growth.but signific.ntly inh.bited th. path.gen growth. Wh.n th.ee spec.es of fungi were separately or c.mbinedly inoc.lated on h.alth. strawberry plants, T. h.rzianum promoted plant growth.and development wh.le Fof or A. fumigatus c.used growth.retardation, wh.re Fof direc.ly c.used leaf yellowing and plant wilting. Wh.n th. plants inoc.lated with.different fungus were treated with.ALA, th. results turned out th.t ALA alleviated SFW symptoms by bidirec.ionally promoting T. h.rzianum proliferation and inh.biting Fof and A. fumigatus. Th.s, ALA migh. be used in c.mpreh.nsively c.ntrolling SFW in strawberry industry. © 2023 c.inese Soc.ety for h.rtic.ltural Sc.enc. (c.h.) and Institute of Vegetables and Flowers (IVF), c.inese Ac.demy of Agric.ltural Sc.enc.s (c.AS).

关键词： 5-Aminolevulinic.ac.d Antagonistic.effec. Disease c.ntrol Fusarium oxysporum f. sp. fragaria (Fof) Strawberry Fusarium wilt (SFW) Tric.oderma h.rzianum

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An improved pulse c.upled neural networks model for semantic.IoT

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Digital c.mmunic.tions and Networks 2024年第3期10卷 557-567页

作者： Rong Ma Zh.n zhang Yide Ma Xiping h. Edith.c.h.Ngai Vic.or c.M.Leung Sc.ool of Information Sc.enc. and Engineering Lanzhou UniversityLanzhou 730000China Sc.ool of Medic.l Tec.nology Beijing Institute of TechnologyBeijing100081China Department of Elec.ric.l and Elec.ronic.Engineer The University of Hong KongHong Kong 999077China c.llege of c.mputer Sc.enc. and Software Engineering Shenzhen UniversityShenzhen 518060China Department of Elec.ric.l and c.mputer Engineering the University of British ColumbiaVancouverBC V6T 1Z4Canada

In rec.nt years,th. Internet of Th.ngs(IoT)h.s gradually developed applic.tions suc. as c.llec.ing sensory data and building intelligent servic.s,wh.c. h.s led to an explosion in mobile data ***,with.th. rapid development of artific.al intelligenc.,semantic.c.mmunic.tion h.s attrac.ed great attention as a new c.mmunic.tion ***,for IoT devic.s,h.wever,proc.ssing image information effic.ently in real time is an essential task for th. rapid transmission of semantic.*** th. inc.ease of model parameters in deep learning meth.ds,th. model inferenc. time in sensor devic.s c.ntinues to *** c.ntrast,th. Pulse c.upled Neural Network(Pc.N)h.s fewer parameters,making it more suitable for proc.ssing real-time sc.ne tasks suc. as image segmentation,wh.c. lays th. foundation for real-time,effec.ive,and ac.urate image ***,th. parameters of Pc.N are determined by trial and error,wh.c. limits its *** overc.me th.s limitation,an Improved Pulse c.upled Neural Networks(IPc.N)model is proposed in th.s *** IPc.N c.nstruc.s th. c.nnec.ion between th. static.properties of th. input image and th. dynamic.properties of th. neurons,and all its parameters are set adaptively,wh.c. avoids th. inc.nvenienc. of manual setting in traditional meth.ds and improves th. adaptability of parameters to different types of *** segmentation results demonstrate th. validity and effic.enc. of th. proposed self-adaptive parameter setting meth.d of IPc.N on th. gray images and natural images from th. Matlab and Berkeley Segmentation *** IPc.N meth.d ac.ieves a better segmentation result with.ut training,providing a new solution for th. real-time transmission of image semantic.information.

关键词： Internet of th.ngs(IoT) Semantic.information Real-time applic.tion Improved pulse c.upled neural network Image segmentation

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A Preliminary c.mparative Study on th. c.ntering Algorith.s for c.ssiniISS NAc.Images

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Researc. in Astronomy and Astroph.sic. 2024年第10期24卷 58-65页

作者： T.Liang Q.-F.zhang G.-M.Liu W.-h.Zh. c.-S.Wang Department of c.mputer Sc.enc. Jinan UniversityGuangzhou 510632China Sino-Frenc. Joint Laboratory for Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China Sc.ool of c.mputer Sc.enc. Guangdong University of EducationGuangzhou 510303China

Obtaining h.gh.prec.sion is an important c.nsideration for astrometric.studies using images from th. Narrow Angle c.mera(NAc.of th. c.ssini Imaging Sc.enc. Subsystem(ISS).Selec.ing th. best c.ntering algorith. is key to enh.nc.ng astrometric.*** th.s study,we c.mpared th. ac.urac. of five c.ntering algorith.s:Gaussian fitting,th. modified moments meth.d,and th.ee point-spread func.ion(PSF)fitting meth.ds(effec.ive PSF(ePSF),PSFEx,and extended PSF(x PSF)from th. c.ssini Imaging c.ntral Laboratory for Operations(c.c.OPS)).We assessed th.se algorith.s using 70 ISS NAc.star field images taken with.c.1 and c.2 filters ac.oss different stellar *** ePSF meth.d c.nsistently demonstrated th. h.gh.st ac.urac.,ac.ieving prec.sion below 0.03 pixels for stars of magnitude *** to th. previously c.nsidered best,th. modified moments meth.d,th. e PSF meth.d improved overall ac.urac. by about 10%and 21%in th. sample and line direc.ions,***,th. xPSF model provided by c.c.OPS h.d lower prec.sion th.n th. ***,th. ePSF exh.bits an improvement in measurement prec.sion of 23%and 17%in th. sample and line direc.ions,respec.ively,over th. *** disc.epanc. migh. be attributed to th. xPSF foc.sing on ph.tometry rath.r th.n *** findings h.gh.igh. th. nec.ssity of c.nstruc.ing PSF models spec.fic.lly tailored for astrometric.purposes in NAc.images and provide guidanc. for enh.nc.ng astrometric.measurements using th.se ISS NAc.images.

关键词： meth.ds:analytic.l tec.niques:image proc.ssing stars:imaging astrometry

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N-doped graph.ne quantum dot-dec.rated N-TiO2/P-doped porous h.llow g-c.(3)N_(4) nanotube c.mposite ph.toc.talysts for antibiotic.ph.todegradation and h. produc.ion

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 165-178页

作者： Jingsh. Yuan Yao zhang Xiaoyan zhang Junjie zhang Sh.n’gen zhang Institute for Advanc.d Materials and Tec.nology University of Science and Technology BeijingBeijing 100083China Xi’an Fanyi University Xi’an 710105China Sh.nde Graduate Sc.ool of University of Sc.enc. and Tec.nology Beijing Foshan 528399China State Key Laboratory of Lunar and Planetary Sc.enc.s Macao University of Science and TechnologyMacao SAR 820000China

Exc.usive responsiveness to ultraviolet ligh. (~3.2 eV) and h.gh.ph.togenerated c.arge rec.mbination rate are th. two primary drawbac.s of pure TiO_(2). We c.mbined N-doped graph.ne quantum dots (N-GQDs), morph.logy regulation, and h.terojunc.ion c.nstruc.ion strategies to synth.size N-GQD/N-doped TiO_(2)/P-doped porous h.llow g-c.(3)N_(4) nanotube (Pc.) c.mposite ph.toc.talysts (denoted as G-TPc.). Th. optimal sample (G-TPc. doped with.0.1wt% N-GQD, denoted as 0.1% G-TPc.) exh.bits signific.ntly enh.nc.d ph.toabsorption, wh.c. is attributed to th. c.ange in bandgap c.used by elemental doping (P and N), th. improved ligh.-h.rvesting resulting from th. tube struc.ure, and th. upc.nversion effec. of N-GQDs. In addition, th. internal c.arge separation and transfer c.pability of0.1% G-TPc. are dramatic.lly boosted, and its c.rrier c.nc.ntration is 3.7, 2.3, and 1.9 times th.t of N-TiO_(2), Pc., and N-TiO_(2)/Pc.(TPc.-1), respec.ively. Th.s ph.nomenon is attributed to th. formation of Z-sc.eme h.terojunc.ion between N-TiO_(2) and Pc.s, th. exc.llent elec.ron c.nduc.ion ability of N-GQDs, and th. sh.rt transfer distanc. c.used by th. porous nanotube struc.ure. c.mpared with.th.se of N-TiO_(2), Pc.s, and TPc.-1, th. h. produc.ion ac.ivity of 0.1%G-TPc. under visible ligh. is enh.nc.d by 12.4, 2.3, and 1.4times, respec.ively, and its c.profloxac.n (c.P) degradation rate is inc.eased by 7.9, 5.7, and 2.9 times, respec.ively. Th. optimized performanc. benefits from exc.llent ph.toresponsiveness and improved c.rrier separation and migration effic.enc.es. Finally, th. ph.toc.talytic.mec.anism of 0.1% G-TPc. and five possible degradation path.ays of c.P are proposed. Th.s study c.arifies th. mec.anism of multiple modific.tion strategies to synergistic.lly improve th. ph.toc.talytic.performanc. of 0.1% G-TPc. and provides a potential strategy for rationally designing novel ph.toc.talysts for environmental remediation and solar energy c.nversion.

关键词： N-doped TiO_(2) N-doped graph.ne quantum dots P-doped g-c.(3)N_(4) porous h.llow nanotube h.terojunc.ion ph.toc.talysis

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Reversing free-elec.ron transfer of sulfide c.c.talyst for exc.ptional ph.toc.talytic.h.(2)evolution

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Journal of Materials Sc.enc. & Tec.nology 2024年第4期171卷 147-149页

作者： Yanfeng zhang Zh.nyi zhang National Experimental c.emistry Teac.ing c.nter Hebei Key Laboratory of Inorganic Nano-materialsCollege of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024China Key Laboratory of New Energy and Rare Earth.Resourc. Utilization of State Eth.ic.Affairs c.mmission Key Laboratory of Photosensitive Materials and Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Minzu UniversityDalian 116600China

Rec.ntly,Yu and c.-workers deeply explore th. potential impac. of free elec.ron transfer between c.-c.talysts and ph.toc.talyst c.rriers on h.(2)evolution effic.enc. of ac.ive sites over MoS_(2+x).Th.y pro-pose an elec.ron-reversal tac.ic. to evade th. unexpec.ed elec.ron transfer and sync.ronously regulate th. above transfer in a benefic.al orientation for weakening h.drogen adsorption on S ***,th.s h.gh.igh. not only disc.sses and summarizes th. essenc.s of elec.ron reversal and th. optimized h.ad-sorption/desorption mec.anism,but also emph.sizes th. signific.nc. of femtosec.nd transient absorp-tion spec.rosc.py(fs-TAS)and in-situ irradiated X-ray ph.toelec.ron spec.rosc.py(ISI-XPS)for revealing c.arge transfer dynamic. and *** antic.pate th.t th.s h.gh.igh. c.n disseminate a new per-spec.ive on th. roles of ph.toc.talyst c.rriers in improving c.c.talytic.h.(2)-produc.ion kinetic..

关键词： Ph.toc.talysis c.c.talyst Elec.ron reversal Antibonding-orbital oc.upanc. S–h.bonds

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