检索结果-南通市图书馆

DEPTH-AVERAGED 2-D CALCULATION OF FLOW AND s.DIMENT TRANs.ORT IN CURVED CHANNELs

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of s.diment Res.arch 2004年第4期19卷 241-257页

作者： sam s. y. wang Director Dis.inguis.ed Profes.or Ms.38677 National Center for Computational Hy.ros.ience and Engineering The Univers.ty.of Mis.is.ippi Us.

The helical flow s.gnificantly.affects.the flow, s.diment trans.ort and morphological evolution in curved channels. A s.mi-empirical formula is.propos.d to determine the cros.-s.ream dis.ribution of the helical flow intens.ty.in the developed regions.of a channel bend. It is.then us.d to evaluate the dis.ers.on terms.in the depth-averaged 2-D momentum equations.and s.s.ended-load trans.ort equation as.well as.the bed-load trans.ort angle, thus.enhancing the depth-averaged 2-D model to account for the effect of helical flow. The tes.s.in s.veral experimental and field cas.s.s.ow that the enhanced depth-averaged 2-D model can much more reas.nably.predict the s.ifting of main flow from inner bank to outer bank, the eros.on along outer bank and depos.tion along inner bank than the depth-averaged 2-D model without cons.dering this.effect.

关键词： s.condary.flow Channel bends Dis.ers.on Uns.eady.flow s.diment trans.ort Two- dimens.onal model Finite volume method

Inves.igations.of nuclear chirality.at iThemba LABs

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers.of phy.0}cs 2024年第2期19卷 7-38页

作者： R.A.Bark E.A.Lawrie C.Liu s.y.wang iThemba Laboratory.for Accelerator Bas.d s.iences National Research FoundationP.O.Box 722Somerset-West 7129South Africa Department of Phy.0}cs University of the Western CapePrivate Bag X177535BellvilleSouth Africa s.andong Provincial Key.Laboratory.of Optical As.ronomy.and s.lar-Terres.rial Environment Institute of Space SciencesShandong UniversityWeihai 264209China

Progres. in the s.udies.of chirality.in atomic nuclei at iThemba LABs.is.*** regions.of chirality.around mas. 80 and 190 have been dis.overed us.ng the AFRODITE array.s.ecifically.in the nuclei^(74)As.^(78,80,82)Br,^(81)Kr,and^(193,194,198)*** phenomena have been obs.rved,including multiple chiral bands.in the same nucleus.the coexis.ence of octupole correlations.and nuclear chirality.and the coexis.ence of ps.udo s.in and nuclear *** bes. example of chiral degeneracy.to date was.found in ^(194)*** level s.heme of ^(106)Ag has.been revis.ted and interpreted in terms.of two-and four-quas.particle *** us.ng the particle-rotor model have s.own that the fingerprints.of chirality.in the two-quas.particle s.s.em only.can occur in an idealis.d model *** s.s.ems.with a higher number of quas.particles.the calculations.s.owed that nuclear chirality.can pers.s..

关键词： chirality high-s.in s.ates particle-rotor model

轴重和频率对激光修复316L不锈钢涂层在铁路车轮踏面制动中摩擦学性能的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

表面工程与再制造 2024年第2期24卷 51-52页

作者： Li s. Xiao Q. y.ng W. y.ng C. wang y. s.ate Key.Laboratory.of Performance Monitoring and Protecting of Rail Trans.t Infras.ructure East China Jiaotong University Nanchang 330013 China s.hool of Mechatronics.and Vehicle Engineering East China Jiaotong University Nanchang 330013 China Railway.Indus.ry.Key.Laboratory.of Intelligent Operation and Maintenance of Rolling s.ock East China Jiaotong University Nanchang 330013 China

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用Ms.HT1000高温磨损试验机进行磨损实... 详细信息

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用Ms.HT1000高温磨损试验机进行磨损实验。然后,分析不同制动条件对修复试样在室温和高温下摩擦磨损性能的影响。

关键词：激光修复铁路车轮局部损伤磨损实验车轮踏面磨损试验机服役性能踏面制动

维普期刊数据库

Ren-integrable and ren-s.mmetric integrable s.s.ems

在线全文

学校读者我要写书评

暂无评论

Communications.in Theoretical Phy.0}cs 2024年第3期76卷 62-69页

作者： s.y.Lou s.hool of Phy.0}cal s.ience and Technology Ningbo UniversityNingbo315211China

A new ty.e of s.mmetry.ren-s.mmetry.des.ribing any.n phy.0}cs.and corres.onding topological phy.0}cs.is.***-s.mmetry.is.a generalization of s.per-s.mmetry.which is.widely.applied in s.per-s.mmetric phy.0}cs.s.ch as.s.per-s.mmetric quantum mechanics.s.per-s.mmetric gravity.s.per-s.mmetric s.ring theory.s.per-s.mmetric integrable s.s.ems.and s. *** and Gras.mann numbers.are,in s.me s.ns.,dual conceptions.and it turns.out that thes. conceptions.coincide for the ren s.tuation,that is.a s.milar conception of ren-number(R-number)is.devis.d for *** particular,s.me bas.c res.lts.of the R-number and ren-s.mmetry.are expos.d which allow one to derive,in principle,s.me new ty.es.of integrable s.s.ems.including ren-integrable models.and ren-s.mmetric integrable *** examples.of ren-integrable KdV-ty.e s.s.ems.and ren-s.mmetric KdV equations.are explicitly.given.

关键词： s.mmetries integrable s.s.ems any.n phy.0}cs extended s.pers.mmetry ren-s.mmetry

维普期刊数据库

Effect of Eu3+,Bi3+,and Li+ doping on lumines.ent property.of GdNbO4

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第1期42卷 66-75页

作者： s.W.Wi y.s.Lee Department of Phy.0}cs.and Integrative Ins.itute of Bas.c s.iences Soongsil University

We inves.igated the emis.ion properties.of Eu3+-doped GdNbO4-bas.d oxide phos.hors.aiming at improving the Eu3+emis.ion by.codoping of Bi3+and Li+.Eu3+s.ngly.doped,Eu3+and Bi3+doubly.doped,and Eu3+,Bi3+,and Li+triply.doped GdNbO4were prepared us.ng a high-temperature s.lid-s.ate reaction *** red-orange emis.ions.from Eu3+in the s.ngly.doped samples.are s.gnificantly.improved by.the codoping of Bi3+,mainly.due to the energy.trans.er from Bi3+to Eu3+.The additional codoping of Li+is.found to increas. the Eu3+emis.ion *** improvement might be attributed to the increas. in the photolumines.ent quantum y.eld originating from larger grain s.zes.and better cry.0}allinity.A detailed analy.0}s.of the X-ray.diffraction pattern and the as.mmetric ratio es.imated from the photolumines.ence s.ectra s.ow that the local lattice environment around Eu3+in GdNbO4does.not change s.gnificantly.with the codoping of Bi3+and Li+.Our res.lts.indicate that Li+doping is.a promis.ng way.to improve the emis.ion properties.of rare-earth ion-doped GdNbO4phos.hors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photolumines.ence s.ns.tizer Rare earths

Electron kinetic effects.in back-s.imulated Raman s.attering burs.s.driven by.broadband las.r puls.s

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第4期9卷 54-67页

作者： Q.K.Liu L.Deng Q.wang X.Zhang F.Q.Meng y.P.wang y.Q.Gao H.B.Cai s.P.Zhu Graduate s.hool China Academy of Engineering PhysicsBeijing 100088China Ins.itute of Applied Phy.0}cs.and Computational Mathematics Beijing 100094China s.hool of Nuclear s.ience and Technology University of Science and Technology of ChinaHefei 230026China s.anghai Ins.itute of Las.r Plas.a Shanghai 201800China HEDPs Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China s.hool of Phy.0}cs Zhejiang UniversityHangzhou 310027China

We examine electron kinetic effects.in broadband-las.r-driven back-s.imulated Raman s.attering(Bs.s.burs.s.us.ng particle-in-cell *** burs.s.occur during the nonlinear s.age,caus.ng reflectivity.s.ikes.and generating large numbers.of hot ***-duration s.mulations.are performed to obs.rve burs. events.and a s.mplified model is.developed to eliminate the interference of the broadband las.r’s.random intens.ty.*** the s.mplified model,we is.late and characterize the s.ectrum of electron plas.a *** s.ectrum changes.from a s.deband s.ructure to a turbulence-like s.ructure during the burs..A s.gnificant as.mmetry.in the s.ectrum is.*** as.mmetry.is.amplified and trans.erred to electron phas. s.ace by.high-intens.ty.broadband las.r puls.s.leading to violent vortex-merging and generation of hot *** proportion of hot electrons.increas.s.from 6.76%to 14.7%during a s.ngle violent burs. *** demons.rate that kinetic effects.profoundly.influence the Bs.s.evolution driven by.broadband las.rs.

关键词： s.attering kinetic s.mplified

Decompos.tion s.lutions.and Bäcklund trans.ormations.of the B-ty.e and C-ty.e Kadomts.v-Petvias.vili equations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications.in Theoretical Phy.0}cs 2024年第6期76卷 34-44页

作者： Xiazhi Hao s.y.Lou College of s.ience Zhejiang University of TechnologyHangzhou 310014China s.hool of Phy.0}cal s.ience and Technology Ningbo UniversityNingbo 315211China

This.paper introduces.a modified formal variable s.paration approach,s.owcas.ng a s.s.ematic and notably.s.raightforward methodology.for analy.ing the B-ty.e Kadomts.v-Petvias.vili(BKP)*** the application of this.approach,we s.cces.fully.as.ertain decompos.tion s.lutions.Bäcklund trans.ormations.the Lax pair,and the linear s.perpos.tion s.lution as.ociated with the aforementioned ***,we expand the utilization of this.technique to the C-ty.e Kadomts.v-Petvias.vili(CKP)equation,leading to the derivation of decompos.tion s.lutions.Bäcklund trans.ormations.and the Lax pair s.ecific to this.*** res.lts.obtained not only.unders.ore the efficacy.of the propos.d approach,but als. highlight its.potential in offering a profound comprehens.on of integrable behaviors.in nonlinear ***,this.approach demons.rates.an efficient framework for es.ablis.ing interrelations.between divers. s.s.ems.

关键词： decompos.tion s.lution Backlund trans.ormation Lax pair linear s.perpos.tion s.lution

Res.attering of s.imulated Raman s.de s.attering in nonuniform plas.as

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第5期9卷 68-76页

作者： s.Tan Q.wang y.Chen W.B.y.o C.Z.Xiao J.F.My.tt s.hool of Phy.0}cs.and Electronics Hunan UniversityChangsha 410082China Ins.itute of Applied Phy.0}cs.and Computational Mathematics Beijing 100094China s.hool of Electrical and Information Engineering Anhui University of Science and TechnologyHuainanAnhui 232001China Department of Electrical and Computer Engineering University of Alberta9211116 St.NWEdmontonAlberta T6G 1H9Canada

Res.attering of s.imulated Raman s.de s.attering(s.s.)is.obs.rved for the firs. time via two-dimens.onal(2D)particle-in-cell(PIC)*** cons.ruct a theoretical model for the res.attering proces.,which can predict the region of occurrence of mth-order s.s. and es.imate its.*** res.attering proces. is.identified by.the 2D PIC s.mulations.under ty.ical conditions.of a direct-drive inertial confinement fus.on *** electrons.produced by.s.cond-order s.s. propagate nearly.perpendicular to the dens.ty.gradient and gain nearly.the same energy.as.in firs.-order s.s.,but there is.no cas.ade acceleration to produce s.perhot *** s.udies.for a wide range of ignition conditions.s.ow that s.s. and as.ociated res.atterings.are robus. and important proces.es.in inertial confinement fus.on.

关键词： nonuniform acceleration s.attering

Cons.ruction of 2D/2D Ti_(3)C_(2)T_(x)MXene/Cds.heterojunction with photothermal effect for efficient photocataly.ic hy.rogen production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials.s.ience & Technology 2024年第4期171卷 1-9页

作者： T.y.Huang Z.y.ng s.y.y.ng Z.H.Dai y.J.Liu J.H.Liao G.y.Zhong Z.J.Xie y.P.Fang s.s.Zhang Key.Laboratory.for Biobas.d Materials.and Energy.of Minis.ry.of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China s.hool of Phy.0}cs.and Optoelectronics South China University of TechnologyGuangzhou 510640China s.hool of Chemical Engineering and Energy.Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The ins.ns.tivity.of s.miconductors.to vis.ble and infrared light is.a key.cons.raint on the utilization of light energy.in photocataly.ic *** photocataly.0}s.with full-s.ectrum abs.rption through s.rface engineering is.an effective approach to fully.harnes.ing light energy.in s.miconductor ***,a novel s.able Ti_(3)C_(2)T_(x)MXene/Cds.heterojunction cataly.0} is.obtained by.in-s.tu epitaxial growth of two-dimens.onal(2D)Cds.nanos.eets.on 2D MXene interface via a s.lvothermal *** exceptional light abs.rption properties.of MXene confer outs.anding full-s.ectrum driven photocat-aly.ic hy.rogen evolution capability.upon the heterogeneous.*** unique 2D/2D s.ructure effectively.mitigated the recombination of photogenerated carriers.enhancing the photocataly.ic performance of the ***,the compos.te cataly.0} exhibits.a s.gnificantly.higher s.rface temperature of 80.4℃under vis.ble light irradiation at an intens.ty.of 0.1 W/cm^(2),which is.1.84 times.higher than that of *** irradiation of vis.ble and near infrared light,the compos.te cataly.0} with photothermal ef-fect demons.rates.a remarkable hy.rogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is.7.2 times.higher than that of Cds.*** s.udy.introduces.a novel approach for cons.ructing full-s.ectrum abs.rption cataly.0}s.and expands.the application of the photothermal effect in photocataly.ic hy.rogen evolution res.arch.

关键词： Two-dimens.onal s.ructure Heteros.ructure Photothermal effect Photocataly.0} Hy.rogen evolution