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Higher-order m.de analysis for SOLEIL-type superc.nduc.ing c.vity

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中国科学技术大学学报 2024年第7期54卷 0706-1-0706-11页

作者： c.ai X. Li Q. Xu Y. Tang Y. Tan m. wu c.-F. National Sync.rotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

A 499.8 m.z SOLEIL-type superc.nduc.ing c.vity was sim.lated and designed for the first tim. in this paper. The higher-order m.de (HOm. properties of the c.vity were investigated. Two kinds of c.axial HOm.c.uplers were designed. Using 4 L-type and 4 T-type HOm.c.uplers, the longitudinal im.edanc. was suppressed to 3 kΩ, and the transverse im.edanc. below 30 kΩ/m. The HOm.dam.ing requirem.nts of Hefei Advanc.d Light Fac.lity (HALF) were satisfied. This paper c.nduc.s an in-depth study on the radio frequenc. (RF) design, m.ltipac.ing optim.zation, and therm.l analysis of these c.axial c.uplers. Sim.lation results indic.ted that under operating ac.eleration voltage, the optim.zed c.uplers does not exhibit m.ltiplic.ting or therm.l breakdown phenom.na. The c.vity has the potential to reac. a higher ac.eleration gradient.

关键词：高次模耦合器超导腔高频系统二次电子倍增热仿真

Review of Networked m.c.ogrid Protec.ion:Arc.itec.ures,c.allenges,Solutions,and Future Trends

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c.EE Journal of Power and Energy System. 2024年第2期10卷 448-467页

作者： Jorge de la c.uz Ying wu John E.c.ndelo-Bec.rra Juan c.Vasquez Josep m.Guerrero c.nter for Researc. on m.c.ogrids(c.Om. Department of Energy TechnologyAalborg University9220 AalborgDenmark Fac.ltad de m.nas Departamento de Energia Eléctrica y AutomaticaUniversidad Nacional de ColombiaSede MedellinCarrera 80 No.65-223RobledoMedellin 050041Colombia. c.nter for Researc. on m.c.ogrids at UPc.UPc.c.Om. Department of Electronic EngineeringTechnical University of Catalonia(UPC)08019 Barcelona Spain Ic.EA Pg.Lluis Companys 2308010 BarcelonaSpain c.nter for Researc. on m.c.ogrids at AAU(AAU c.Om. AAU EnergyAalborg University(AAU)9220 Aalborg EastDenmark

Design and selec.ion of advanc.d protec.ion sc.em.s have bec.m. essential for reliable and sec.re operation of networked *** protec.ion sc.em.s that allow c.rrec. operation of m.c.ogrids have been proposed for individual system. in different topologies and ***,protec.ion sc.em.s for networked m.c.ogrids are still in devel-opm.nt,and further researc. is required to design and operate advanc.d protec.ion in interc.nnec.ed *** of these m.c.ogrids in different nodes with various interc.n-nec.ion tec.nologies inc.eases fault oc.urrenc. and c.m.lic.tes protec.ion *** paper aim. to point out c.allenges in developing protec.ion for networked m.c.ogrids,potential solutions,and researc. areas that need to be addressed for their ***,this artic.e presents a system.tic.analysis of different m.c.ogrid c.usters proposed sinc. 2016,inc.uding several arc.itec.ures of networked m.c.ogrids,operation m.des,c.m.onents,and utilization of renewable sourc.s,whic. have not been widely explored in previous review ***,the paper presents a disc.ssion on protec.ion system. c.rrently available for m.c.ogrid c.usters,c.rrent c.allenges,and solutions that have been proposed for these ***,it disc.sses the trend of protec.ion sc.em.s in networked m.c.ogrids and presents som. c.nc.usions related to ***—Adaptive eprotec.ion,m.c.ogrid c.uster,m.c.ogrid,m.ltiple m.c.ogrid,networked m.c.ogrid,real-tim. sim.lation,sm.rt grid.

关键词： Adaptive eprotec.ion m.c.ogrid c.uster m.c.ogrid m.ltiple m.c.ogrid networked m.c.ogrid real-tim. sim.lation sm.rt grid

Effec. of m. addition on m.c.ostruc.ure and m.c.anic.l properties of GX40c.NiSi25-12 austenitic.heat resistant steel

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c.ina Foundry 2024年第3期21卷 205-212页

作者： Guan-yu Jiang m.ng-wu wu Xiao-guang Yang Hui Wang Yu-yuan Zhu Hubei Key Laboratory of Advanc.d Tec.nology for Autom.tive c.m.onents Wuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Xiangyang 441000HubeiChina Wesc.st Industries(c.ina)c.. Ltd.Wuhan 430100China

Three types of steels were designed on the basis of GX40c.NiSi25-12 austenitic.heat resistant steel by adding different m. c.ntents(2wt.%,6wt.%,and 12wt.%).Therm.dynam.c.c.lc.lation,m.c.ostruc.ure c.arac.erization and m.c.anic.l property tests were c.nduc.ed to investigate the effec. of m. addition on the m.c.ostruc.ure and m.c.anic.l properties of the austenitic.heat resistant *** show that the m.trix struc.ure in all the three types of steels at room.tem.erature is c.m.letely *** Nbc.and m.(23)c.(6)prec.pitate at grain boundaries of austenite *** the inc.ease of m. c.ntent,the num.er of c.rbides inc.eases and their distribution bec.m.s m.re *** the m. c.ntent inc.eases from.1.99%to 12.06%,the ultim.te tensile strength,yield strength and elongation inc.ease by 14.6%,8.0%and 46.3%,*** im.rovem.nt of the m.c.anic.l properties of austenitic.steels c.n be explained by utilizing c.assic.theories of alloy strengthening,inc.uding solid solution strengthening,prec.pitation strengthening,and grain *** inc.ease in alloy strength c.n be attributed to solid solution strengthening and prec.pitation strengthening c.used by the addition of *** im.rovem.nt of the plastic.ty of austenitic.steels c.n be explained from.two aspec.s:grain refinem.nt and hom.genization of prec.pitated phases.

关键词： austenitic.heat resistant steel m.nganese m.c.ostruc.ure m.c.anic.l properties

Sensitivity analysis of m.deling param.ters to soot and PAHs predic.ion in ethylene inverse diffusion flam.

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Sc.enc. c.ina(Tec.nologic.l Sc.enc.s) 2024年第2期67卷 486-498页

作者： wu BingKun LI TianJiao LIU Dong m.IT Key Laboratory of Therm.l c.ntrol of Elec.ronic.Equipm.nt School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanc.d c.m.ustion Laboratory School of Energy and Power EngineeringNanjing University of Science and Technology Nanjing 210094China

The soot form.tion m.del based on inverse ethylene diffusion flam.s was perform.d to study the sensitivity of the soot form.tion proc.ss to the predic.ion *** effec.s of effic.enc. param.ters suc. as soot inc.ption,surfac. growth and c.agulation on the sim.lation results were studied by using the adjustable effic.enc. *** addition,the reversible soot m.del and c.njugate heat transfer(c.T)m.del were also introduc.d to explore their *** indic.ted that,am.ng adjustable effic.enc. param.ters,the nuc.eation effic.enc. had the greatest influenc. on the predic.ed soot and PAHs distributions,while the Habstrac.ion-c.H2-addition(HAc.)proc.ss and PAH adsorption surfac. growth effic.enc.es im.ac.ed *** adjustable effic.enc. param.ters had a signific.nt effec. on the c.nc.ntration of soot gaseous prec.rsors and soot partic.es,but their effec.s on tem.erature,gas phase m.lec.les,and interm.diate spec.es were not *** the nuc.eation effic.enc. inc.eased from.2×10^(-6)to 1×10^(-4),the predic.ed value of the integrated soot was inc.eased by nearly 50%,and the m.xim.m.prim.ry partic.e num.er density and the num.er of aggregates were inc.eased by an order of *** m.xim.m.c.nc.ntration of BAPYR was ***,the peak tem.erature along the axial direc.ion inc.eased by only 3.5 *** the reversible soot m.del,the approxim.tion results of the adjustable effic.enc. param.ters c.uld be m.dified,whic. showed the feasibility of the *** use of the c.T m.del prom.ted pyrolysis of the fuel below the outlet of the fuel tube,with high-tem.erature zones,soot zones,and PAHs zones m.ving towards higher flam. ***,when using the reversible m.del and the c.T m.del,the m.xim.m.soot volum. frac.ion dec.eased by 39%c.m.ared with the basic.effic.enc. param.ters,while the c.nc.ntration of BAPYR inc.eased by 162%,and the c.nc.ntrations of gas phase spec.es were dec.eased.

关键词： inverse diffusion flam.s soot form.tion soot m.del ethylene

c.nfiguring single-layer m.ene nanosheet onto natural wood fiber via c.Ti-c.c.valent bonds for high-stability Li-S batteries

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Journal of Energy c.em.stry 2024年第8期95卷 701-711,I0016页

作者： Yangyang c.en Yu Liao Ying wu Lei Li Zhen Zhang Sha Luo Yiqiang wu Yan Qing c.llege of m.terials Sc.enc. and Tec.nology Central South University of Forestry and TechnologyChangsha 410004HunanChina

Lithium.sulfur batteries(LSBs)are c.nsidered prom.sing c.ndidates for next-generation battery tec.nologies owing to their outstanding theoretic.l energy density and ***,the low c.nduc.ivity and polysulfide shuttling effec. of S c.thodes severely ham.er the prac.ic.l perform.nc. of ***,in situ-generated single layer m.ene nanosheet/hierarc.ic.l porous c.rbonized wood fiber(m./Pc.F)c.m.osites are prepared via a nonhazardous eutec.ic.ac.ivation strategy c.upled with pyrolysis-induc.d gas *** unique arc.itec.ure,wherein single layer m.ene nanosheets are c.nstruc.ed on c.rbonized wood fiber walls,ensures rapid polysulfide c.nversion and c.ntinuous elec.ron transfer for redox *** c.Ti-c.bonds form.d between m.ene and Pc.F c.n c.nsiderably expedite the c.nversion of polysulfides,effec.ively suppressing the shuttle *** im.ressive c.pac.ty of 1301.1 m.A h g^(-1)at 0.5 c.ac.om.anied by rem.rkable stability is attained with the m./Pc.F host,as evidenc.d by the c.pac.ty m.intenanc. of 722.6 m.A h g^(-1)after 500 ***,the m./Pc.F/S c.thode c.n still deliver a high c.pac.ty of 886.8 m.A h g^(-1)at a high S loading of 5.6 m. c.^(-2).The c.nstruc.ion of two-dim.nsional m.enes on natural wood fiber walls offers a c.m.etitive edge over S-based c.thode m.terials and dem.nstrates a novel strategy for developing high-perform.nc. batteries.

关键词： Lithium.sulfur batteries S c.thodes m.ene nanosheets Wood fiber c.Ti-c.bonds

c.m.arison of engineering failures and seism.c.responses of 500 kV transform.r-bushing system. in the 2022 Luding earthquake

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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 1029-1041页

作者： Zhu, Wang wu, m.ng’er Xie, Qiang Departm.nt of Struc.ural Engineering Tongji University Shanghai China Key Laboratory of Perform.nc. Evolution and c.ntrol for Engineering Struc.ures (Tongji University) Shanghai China

c.m.nted and m.c.anic.lly c.am.ed types of end fittings (fitting-c.and fitting-m. are c.m.only used in transform.r bushings. During the Luding m. 6.8 earthquake that oc.urred in c.ina on Septem.er 5, 2022, all transform.r bushings with the two types of end fittings in a 500 kV substation were dam.ged. Post-earthquake field investigations were c.nduc.ed, and the failures of the two types of bushings were c.m.ared. Two elem.ntary sim.lation m.dels of the transform.r-bushing system. were developed to sim.late the engineering failures, and further c.m.ute their seism.c.responses for c.m.arison. The results indic.te that the hitc. lugs of the c.nnec.ion flange are struc.urally harm.ul to seism.c.resistanc.. Fitting-m.c.n dec.ease the bending stiffness of the bushing due to the flexible sealing rubber gasket. Sinc. it provides a m.re flexible c.nnec.ion that dissipates energy, the peak ac.elerations and relative displac.m.nts at the top of the bushing are signific.ntly lower than those of the bushing with fitting-c. c.m.ared with fitting-c. fitting-m.transfers the high-stress areas from.the c.nnec.ion flange to the root of the porc.lain, so the latter bec.m.s the m.st vulnerable c.m.onent. Fitting-m.inc.eases the failure risk of the low-strength porc.lain, indic.ting the unsuitability of applying it in high-intensity fortific.tion regions.

关键词： transform.r bushing end fitting Luding earthquake,engineering failure seism.c.responses

Pion-photon and kaon-photon transition distribution am.litudes in the Nam.u–Jona-Lasinio m.del

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c.inese Physic. c 2024年第8期48卷 94-103页

作者： Jin-Li Zhang Jun wu Departm.nt of m.them.tic. and Physic. Nanjing Institute of TechnologyNanjing 211167China National Laboratory of Solid State m.c.ostruc.ures Department of PhysicsNanjing UniversityNanjing 210093China

The Nam.u–Jona-Lasinio m.del is utilized to investigate the pion-and kaon-photon leading-twist transition distribution am.litudes using proper tim. ***,the properties of the vec.or and axial vec.or pion-photon transition distribution am.litudes are exam.ned,and the results m.et the desired *** study involves sum.rule and polynom.ality *** vec.or and axial vec.or pion-photon transition form.fac.ors that are present in theπ^(+)→γe^(+)νproc.ss are the first m.llin m.m.nts of the pion-photon transition distribution *** vec.or transition form.fac.or originates from.the internal struc.ure of hadrons,the axial c.rrent c.n be c.upled to a pion,this pion is virtual,and its c.ntribution will be present independently of the external *** kaon transition form.fac.ors are *** vec.or form.fac.or's value at zero m.m.ntum.transfer is determ.ned by the axial anom.ly,while this is not the c.se for the axial *** vec.or and axial form.fac.ors,as well as the neutral pion vec.or form.fac.or F_(πγγ)(t),are *** to our findings,the pion axial transition form.fac.or is harder than the vec.or transition form.fac.or and harder than the elec.rom.gnetic.form.*** also disc.ss the link betweenπ−γandγ−πtransitions distribution am.litudes.

关键词： transition form.fac.ors NJL m.del transition distribution am.litudes

Iron-c.talyzed Reduc.ive c.aryl)—Si c.oss-c.upling of Diaryl Ethers with c.lorosilanes

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c.inese Journal of c.em.stry 2024年第6期42卷 578-584页

作者： Pei Liu Baowei wu Xuefeng c.ng Jie Kong Sc.ool of c.em.stry and c.em.c.l Engineering Northwestern Polytechnical UniversityXi'anShaanxi710072 China Institute of m.lec.lar Plus Department of Chemistry and Haihe Laboratory of Sustainable Chemical TransformationsTianjin University92 Weijin RoadTianjin300072 China

The reduc.ive c.oss-c.upling between c.aryl)—O and Si—c. bonds is of m.c. im.ortanc. as a valuable strategy for the c.nstruc.ion of c.aryl)—Si bonds but has rem.ined a great ***,we report a reduc.ive c.oss-c.upling of diaryl ethers and c.lorosilanes via strong elec.rophilic.c.aryl)—O and Si—c. bonds c.eavage by iron c.talysis,whic. c.nstitutes an effic.ent protoc.l for the synthesis of a range of func.ionalized *** c.m.ination of low c.st Fec.2 as the prec.talyst and iPrm.c. as the reduc.ant shows high ac.ivity in the suc.essive c.eavage of unac.ivated c.aryl)—O bonds of diaryl ethers and strong elec.rophilic.Si—c. bonds of c.lorosilanes,allowing their c.oss-c.upling in a reduc.ive *** low-valent iron spec.es generated in situ by reduc.ion of Fec.2 with iPrm.c. was proposed,whic. prefers to initially c.eavage the c.aryl)—O bond of diaryl ethers with the c.elation help of an o-am.de auxiliary.

关键词： c.oss-c.upling Diaryl ethers c.lorosilanes c.O bond c.eavage Iron c.talyst 3d transition m.tals Selec.ivity Regioselec.ivity

Stability and Generalization of Hypergraph c.llaborative Networks

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m.c.ine Intelligenc. Researc. 2024年第1期21卷 184-196页

作者： m.c.ael K.Ng Hanrui wu Andy Yip Institute of Data Sc.enc. The University of Hong KongHong KongChina Departm.nt of m.them.tic. The University of Hong KongHong KongChina c.llege of Inform.tion Sc.enc. and Tec.nology Jinan UniversityGuangzhou 510006China

Graph neural networks have been shown to be very effec.ive in utilizing pairwise relationships ac.oss ***,there have been several suc.essful proposals to generalize graph neural networks to hypergraph neural networks to exploit m.re c.m.plex *** partic.lar,the hypergraph c.llaborative networks yield superior results c.m.ared to other hypergraph neural net-works for various sem.-supervised learning *** c.llaborative network c.n provide high quality vertex em.eddings and hyperedge em.eddings together by form.lating them.as a joint optim.zation problem.and by using their c.nsistenc. in rec.nstruc.ing the given *** this paper,we aim.to establish the algorithm.c.stability of the c.re layer of the c.llaborative network and provide generaliz--ation *** analysis sheds light on the design of hypergraph filters in c.llaborative networks,for instanc.,how the data and hypergraph filters should be sc.led to ac.ieve uniform.stability of the learning *** experim.ntal results on real-world datasets are presented to illustrate the theory.

关键词： Hypergraphs vertic.s hyperedges c.llaborative networks graph c.nvolutional neural networks(c.Ns) stability generalization guarantees