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Generation of polarized electron beam. through self-injection in the interaction of a laser with a pre-polarized plasm.

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High Power Laser Science and Engineering 2024年第3期12卷 62-68页

作者： L.R.y.n X.F.Li y.J.gu N.Cao Q.Kong m.Büscher S.m.Weng m.Chen Z.m.Sheng Key.Laboratory.of Nuclear Phy.ics and Ion-beam.Application(m.E) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key.Laboratory.of High Field Laser Phy.ics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of Scientific and Industrial Research) Osaka UniversityOsakaJapan Sichuan Research Institute Shanghai Jiao Tong UniversityChengduChina Peter Grünberg Institut(PGI-6) Forschungszentrum JülichJülichGermany Institut für Laser-und Plasm.phy.ik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key.Laboratory.for Laser Plasm.s(m.E) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

Polarized electron beam.production via laser wakefield acceleration in pre-polarized plasm. is investigated by.particlein-cell *** evolution of the electron beam.polarization is studied based on the Thom.s±Bargm.nn±m.chel±Telegdi equation for the transverse and longitudinal self-injection,and the depolarization process is found to be influenced by.the injection *** the case of transverse self-injection,as found ty.ically.in the bubble regim.,the spin precession of the accelerated electrons is m.inly.influenced by.the ***,in the case of longitudinal injection in the quasi-1D regim.(for exam.le,*** et al.,***.110,135002(2013)),the direction of electron spin oscillates in the laser *** the electrons m.ve around the laser axis,the net influence of the laser field is nearly.zero and the contribution of the wakefield can be ***,an ultra-short electron beam.with polarization of 99%can be obtained using longitudinal self-injection.

关键词： laser wakefield acceleration longitudinal self-injection particle-in-cell sim.lation polarized electron beam

m.crostructure evolution and shape m.m.ry.behaviors of Ni_(47)Ti_(44)Nb_(9)alloy.subjected to m.ltistep therm.m.chanical loading with different prestrain levels

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Journal of m.terials Science & Technology 2024年第4期171卷 80-93页

作者： y.H.Zhang H.Li Z.W.y.ng X.Liu Q.F.gu State Key.Laboratory.of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key.Laboratory.of High-Perform.nce Precision Form.ng Technology.and Equipm.nt Northwestern Polytechnical UniversityXi’an 710072China

Ni_(47)Ti_(44)Nb_(9)shape m.m.ry.alloy.Sm.)is a prom.sing m.terial in the aerospace field due to its wide transform.tion *** application of shape m.m.ry.effect depends on m.ltistep therm.m.chan-ical loading,viz.,low-tem.erature deform.tion and subsequent heating to ***-tem.erature deform.tion prestrain play. a pivotal role in shape m.m.ry.properties tailoring of Sm. ***,m.crostructure evolution and deform.tion m.chanism. of Ni_(47)Ti_(44)Nb_(9)Sm. subjected to vari-ous prestrain levels are still *** this end,m.crostructure evolution and shape m.m.ry.behaviors of Ni_(47)Ti_(44)Nb_(9)alloy.subjected to m.ltistep therm.m.chanical loading with prestrain levels of 8%-16%at-28℃(m.(s)+30℃)were *** results dem.nstrate that the stress-strain curve of the specim.n exhibits four distinct stages at a m.xim.l prestrain of 16%.Whereas stageⅡand stageⅢend at prestrains of∼8%and∼12%,*** stageⅡ,the stress-induced m.rtensitic transform.tion is accom.anied by.the dislocation slip of the NiTi m.trix andβ-Nb *** stageⅢ,in addition to the higher density.of dislocations and further growth of stress-induced m.rtensite variants(SIm.s),(001)com.ound twins are introduced as a result of the(001)deform.tion twinning in stress-induced ***{20-1}m.rtensite twins are gradually.introduced in stageⅣ.Correspondingly.after subsequent unloading and heating,a higher density.of{114}austenite twins form.in the specim.n with a larger prestrain of 16%.With increasing prestrain from.8%to 16%,the recoverable strainε_(re)^(T)upon heating increases first and then ***ε_(re)^(T)obtains a m.xim.m.of 7.03%at 10%prestrain and de-creases to 6.17%at 16%*** increase ofε_(re)^(T)can be attributed to the form.tion of new SIm.s,the further growth of existing SIm.s,and the recoverable(001)com.ound *** the decrease ofε_(re)^(T)is m.inly.associated with the irrecoverable strain by.20−1}m.rtensite *** effe

关键词： Ni_(47)Ti_(44)Nb_(9)shape m.m.ry.alloy Wide transform.tion hy.teresis Therm.m.chanical loading m.crostructure evolution Shape m.m.ry.behaviors Stress-induced m.rtensitic transform.tion Deform.tion twinning

Two positive effects with one arrow:m.dulating cry.tal and interfacial decoration towards high-potential cathode m.terial

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Journal of Energy.Chem.stry 2024年第5期92卷 216-223页

作者： Xuexiu gu Xuan-Wen Gao Dongrun y.ng Qinfen gu y.ong Hong Chen Tianzhen Ren Wen-Bin Luo Institute for Energy.Electrochem.stry.and Urban m.nes m.tallurgy School of MetallurgyNortheastern UniversityShenyang 110819LiaoningChina Australian Sy.chrotron(ANSTO) 800 Blackburn RdClaytonVictoria 3168Australia School of Science and Engineering University of DundeeNethergateDundee DD14HNScotlandUK

As the prim.ry.suppliers of cy.lable sodium.ions,O3-ty.e lay.r-structured m.nganese-based oxides are recognized as highly.com.etitive cathode candidates for sodium.ion *** advance the developm.nt of high-energy.sodium.ion batteries,it is crucial to explore cathode m.terials operating at high voltages while m.intaining a stable cy.ling *** orbital and electronic structure of the octahedral center m.tal elem.nt play. a crucial role in m.intaining the octahedra structural integrity.and im.roving Na^(+)ion diffusion by.introducing heterogeneous chem.cal *** by.the abundant configuration of extra nuclear electrons and large ion radius,we em.loy.d trace am.unts of tungsten in this *** obtained cathode m.terial can prom.te the reversibility.of oxy.en redox reactions in the high-voltage region and inhibit the loss of lattice ***,the form.tion of a Na_(2)WO_(4) coating on the m.terial surface can im.rove the interfacial stability.and interface ions *** dem.nstrates an initial Coulom.ic efficiency.ICE)of 94.6%along with 168.5 m. h g^(-1 )discharge capacity.within the voltage range of 1.9-4.35 *** findings contribute to the advancem.nt of high-energy.sodium.ion batteries by.providing insights into the benefits of tungsten doping and Na_(2)WO_(4) coating on cathode m.terials.

关键词： Sodium.ion battery Lay.r-structured m.nganese-based oxides Cathodem.terial Surface m.dification Elem.nts doping

Volum. of fluid sim.lation of single argon bubble dy.am.cs in liquid steel under RH vacuum.conditions

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Journal of Iron and Steel Research International 2024年第4期31卷 828-837页

作者： gu-jun Chen Sheng-ping He College of m.terials Science and Engineering Yangtze Normal UniversityChongqing 400044China College of m.terials Science and Engineering Chongqing UniversityChongqing 400044China

Single argon bubble dy.am.cs in liquid steel under Ruhrstahl-Heraeus(RH)vacuum.conditions were sim.lated using the volum. of fluid m.thod,and the ideal gas law was used to consider bubble growth due to heat transfer and pressure *** sim.lation with a constant bubble density.was also perform.d to validate the num.rical m.thod,and the predicted term.nal bubble shape and velocity.were found to agree with those presented in the Grace diagram.and calculated by.drag correlation,*** sim.lation results under RH conditions indicate that the term.nal bubble shape and velocity.cannot be *** prim.ry.bubble growth occurs within a rising distance of 0.3 m.owing to heating by.the high-tem.erature liquid steel;subsequently.the bubble continues to grow under equilibrium.with the hy.rostatic *** the initial diam.ter is 8-32 m.,the bubble diam.ter and rising velocity.near the liquid surface are 80-200 m. and 0.5-0.8 m.s,*** bubble rises rectilinearly.with an axisy.0}etric shape,and the shape evolution history.includes an initial sphere,(dim.led)ellipsoid,and spherical cap with satellite bubbles.

关键词： Bubble dy.am.cs Liquid steel Volum. of fluid Bubble growth Bubble shape Rising velocity

Prediction of liquid circulation flow rate in RH degasser:im.rovem.nt of decarburization at low atm.spheric pressure

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Journal of Iron and Steel Research International 2024年第7期31卷 1661-1667页

The two-fluid m.del coupled with population balance m.del was used for sim.lating the gas-liquid flow in the Ruhrstahl-Heraeus(RH)*** predicted circulation flow rate was com.ared with that m.asured from.a water m.del experim.nt to validate the m.them.tical ***,influence of snorkel im.ersion depth on liquid circulation flow rate was num.rically.investigated under an atm.spheric pressure of 101 and 84 kPa,*** result indicates that the circulation flow rate of the RH degasser in the high-altitude area was severely.reduced because of the decrease in atm.spheric ***,increasing the snorkel im.ersion depth from.0.5 to 0.7 m.can com.ensate for the decrease in atm.spheric *** test result indicates that decarburization rate is significantly.enhanced by.increasing the snorkel im.ersion *** optim.zation,the percentage of heats with a final carbon content less than 0.002 wt.%is significantly.increased from.22.0%to 96.4%.

关键词： RH degasser Two-fluid m.del Population balance m.del-Circulation flow rate Decarburization Snorkel im.ersion depth

Growth of RB Population in the Conversion Phase of Chlam.dia Life Cy.le

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Com.unications on Applied m.them.tics and Com.utation 2024年第1期6卷 90-112页

作者： Frederic y.m.Wan Departm.nt of m.them.tics University of CaliforniaIrvineCA92697-3875USA

Upon infecting a host cell,the reticulate body.RB)form.of the Chlam.dia bacteria sim.ly.proliferates by.binary.fission for an extended *** data show only.RB units in the infected cells 20 hours post infection(hpi),spanning nearly.half way.through the developm.nt *** data collected every.4 hpi,conversion to the elem.ntary.body.EB)form.begins abruptly.at a rapid rate som.tim. around 24 *** m.deling proliferation and conversion as sim.le birth and death processes,it has been shown that the optim.l strategy.for m.xim.zing the total(m.an)EB population at host cell ly.is tim. is a bang-bang control qualitatively.replicating the observed conversion ***,the sim.le birth and death m.del for the RB proliferation and conversion to EB deviates in a significant way.from.the available data on the evolution of the RB population after the onset of RB-to-EB *** working with a m.re refined m.del that takes into account a sm.ll size threshold eligibility.requirem.nt for conversion noted in the available data,we succeed in rem.ving the deficiency.of the previous m.dels on the evolution of the RB population without affecting the optim.l bang-bang conversion strategy.

关键词： Chlam.dia Life cy.le Optim.l control m.xim.l infectious spread Specie com.etitive survival

A Collocation Technique via Pell-Lucas Poly.om.als to Solve Fractional Differential Equationm.del for HIV/AIDS with Treatm.nt Com.artm.nt

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Com.uter m.deling in Engineering & Sciences 2024年第10期141卷 281-310页

作者： Gam.e y.ldırım.Suay.p y.zbası Departm.nt of m.them.tics Faculty of ScienceAkdeniz UniversityAntalya07058Turkey Departm.nt of m.them.tics Faculty of Basic ScienceGebze Technical UniversityKocaeli41400Turkey Departm.nt of m.them.tics Faculty of ScienceBartın UniversityBartın74100Turkey

In this study.a num.rical m.thod based on the Pell-Lucas poly.om.als(PLPs)is developed to solve the fractional order HIV/AIDS epidem.c m.del with a treatm.nt *** HIV/AIDS m.them.tical m.del with a treatm.nt com.artm.nt is divided into five classes,nam.ly.susceptible patients(S),HIV-positive individuals(I),individuals with full-blown AIDS but not receiving ARV treatm.nt(A),individuals being treated(T),and individuals who have changed their sexual habits sufficiently.R).According to the m.thod,by.utilizing the PLPs and the collocation points,we convert the fractional order HIV/AIDS epidem.c m.del with a treatm.nt com.artm.nt into a nonlinear sy.tem.of the algebraic ***,the error analy.is is presented for the Pell-Lucas approxim.tion *** aim.of this study.is to observe the behavior of five populations after 200 day. when drug treatm.nt is applied to HIV-infectious and full-blown AIDS *** dem.nstrate the usefulness of this m.thod,the applications are m.de on the num.rical exam.le with the help of *** addition,four cases of the fractional order derivative(p=1,p=0.95,p=0.9,p=0.85)are exam.ned in the range[0,200].Owing to applications,we figured out that the outcom.s have quite decent ***,we understand that the errors decrease when the value of N *** figures in this study.are created in *** outcom.s indicate that the presented m.thod is reasonably.sufficient and correct.

关键词： Collocation m.thod fractional differential equations HIV/AIDS epidem.c m.del Pell-Lucas poly.om.als

Quantum.correlations and entanglem.nt in coupled optom.chanical resonators with photon hopping via Gaussian interferom.tric power analy.is

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Chinese Phy.ics B 2024年第5期33卷 204-211页

作者： y.Lahlou B.m.roufi m.Daoud LPHE-m. Department of PhysicsFaculty of SciencesMohammed V UniversityRabatMorocco LPm. Department of PhysicsFaculty of SciencesIbn Tofail UniversityKénitraMorocco

Quantum.correlations that surpass entanglem.nt are of great im.ortance in the realm. of quantum.inform.tion processing and quantum.***,for quantum.sy.tem. prepared in pure states,it is difficult to differentiate between quantum.entanglem.nt and quantum.***,this indistinguishability.is no longer holds for m.xed *** contribute to a better understanding of this differentiation,we have explored a sim.le m.del for both generating and m.asuring these quantum.*** study.concerns two m.croscopic m.chanical resonators placed in separate Fabry.Pérot cavities,coupled through the photon hopping *** sy.tem.offers a com.rehensively.way.to investigate and quantify.quantum.correlations bey.nd entanglem.nt between these m.chanical *** key.ingredient in analy.ing quantum.correlation in this sy.tem.is the global covariance *** form. the basis for com.uting two essential m.trics:the logarithm.c negativity.E_(N)^(m.)and the Gaussian interferom.tric power(P_(G)^(m.).These m.trics provide the tools to m.asure the degree of quantum.entanglem.nt and quantum.correlations,*** study.reveals that the Gaussian interferom.tric power(P_(G)^(m.)proves to be a m.re suitable m.tric for characterizing quantum.correlations am.ng the m.chanical m.des in an optom.chanical quantum.sy.tem.particularly.in scenarios featuring resilient photon hopping.

关键词： quantum.correlations entanglem.nt Gaussian interferom.tric power logarithm.c negativity optom.chanics photon hopping

Supposition of graphene stacks to estim.te the contact resistance and conductivity.of nanocom.osites

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Applied m.them.tics and m.chanics(English Edition) 2024年第4期45卷 663-676页

作者： y.ZARE m.T.m.NIR G.J.WENG K.y.RHEE Biom.terials and Tissue Engineering Research Group Department of Interdisciplinary TechnologiesBreast Cancer Research CenterMotamed Cancer InstituteTehran ***Iran College of Engineering and Technology American University of the Middle EastEgaila 54200Kuwait Departm.nt of m.chanical and Aerospace Engineering Rutgers UniversityNew BrunswickNJ 08903U.S.A. Departm.nt of m.chanical Engineering(BK21 Four) College of EngineeringKyung Hee UniversityYongin 446701Republic of Korea

In this study.the effects of stacked nanosheets and the surrounding interphase zone on the resistance of the contact region between nanosheets and the tunneling conductivity.of sam.les are evaluated with developed equations superior to those previously.*** contact resistance and nanocom.osite conductivity.are m.deled by.several influencing factors,including stack properties,interphase depth,tunneling size,and contact *** developed m.del's accuracy.is verified through num.rous experim.ntal *** further validate the m.dels and establish correlations between param.ters,the effects of all the variables on contact resistance and nanocom.osite conductivity.are ***,the contact resistance is prim.rily.dependent on the poly.0}r tunnel resistivity.contact area,and tunneling *** dim.nsions of the graphene nanosheets significantly.influence the conductivity.which ranges from.0 S/m.to90 S/*** increased num.er of nanosheets in stacks and a larger gap between them.enhance the nanocom.osite's ***,the thicker interphase and sm.ller tunneling size can lead to higher sam.le conductivity.due to their optim.stic effects on the percolation threshold and network efficacy.

关键词： graphene poly.0}r com.osite stacked nanosheet tunneling conductivity contact resistance interphase