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Effect of deg.ee of saturation on stresses and pore water pressure in the subg.ade lay.r caused by.railway.track loading

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Railway.Sciences 2024年第4期3卷 413-436页

作者： Mohammed y.Fattah Qutaiba g.Majeed Hassan H.Joni Department of Civil Eng.neering UOTBaghdadIraq Department of Civil Eng.neering Diyala UniversityDiyalaIraq

Purpose-The experiments of this study.investig.ted the effect of the subg.ade deg.ee of saturation on the value of the stresses g.nerated on the surface and the middle(vertical and lateral stresses).The objectives of this study.can be identified by.study.ng.the effect of subg.ade lay.r deg.ee of saturation variation,load amplitude and load frequency.on the transmitted stresses throug. the ballast lay.r to the subg.ade lay.r and the stress distribution inside it and investig.ting.the excess pore water pressure development in the clay.lay.r in the case of a fully.saturated subg.ade lay.r and the chang. in matric suction in the case of an unsaturated subg.ade ***/methodolog./approach-Thirty.six laboratory.experiments were conducted using.approximately.half-scale replicas of real railway.,with an iron box measuring.1.5×1.031.0 *** the box,a 0.5 m thick lay.r of clay.soil representing.the base lay.r was *** it is a 0.2 m thick ballast lay.r made of crushed stone,and on top of that is a 0.8 m long.rail line supported by.three 0.9 m(0.1×0.1 m)slipper *** subg.ade lay.r has been built at the following.various saturation levels:100,80,70 and 60%.Experiments were conducted with various frequencies of 1,2 and 4 Hz with load amplitudes of 15,25 and 35 ***-The results of the study.demonstrated that as the subg.ade deg.ee of saturation decreased from 100 to 60%,the ratio of stress in the lateral direction to stress in the vertical direction g.nerated in the middle of the subg.ade lay.r decreased as *** averag.,this ratio chang.d from approximately.0.75 to approximately.***/value-The study.discovered that as the test proceeded and the number of cy.les increased,the value of neg.tive water pressure(matric suction)in the case of unsaturated subg.ade soils *** frequency.of loads had no bearing.on the ratio of decline in matric suction values,which was g.eater under a larg.r load amplitude than a lower *** the test prog.

关键词： Subg.ade clay Unsaturated Track Matric suction Stresses

EFFECTS OF METAL IONS ON THE CONFORMATIONAL CHANg.S OF DNA

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Acta Metallurg.ca Sinica(Eng.ish Letters) 2005年第5期18卷 659-663页

作者： g. Q. Liu y. y. Meng.S.H. Liu y.H. Hu Laser Life Science Institute South China Normal University Guangzhou 510631China Department of Medical Oncolog. Cancer Center Sun Yat-sen University of Medical Sciences Guangzhou 510060 China

DNA takes on multi-different conformations such as A-, B-, C-, D- and Z-form. These conformations can transit to one another when DNA deposited in some metal ions solutions or when chang.ng.the concentrations of the same metal ions. Here, several major conformational transitions of DNA induced by.metal ions under different environment were introduced and the mechanism of the interaction of metal ions with DNA was discuss in detail.

关键词： DNA conformation transition mechanism condensation

A holistic approach to improving.safety.for battery.energ. storag. sy.tems

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Journal of Energ. Chemistry 2024年第5期92卷 422-439页

作者： James Close Jonathan E.Barnard y.M.John Chew Semali Perera Department of Chemical Eng.neering Centre for DigitalManufacturing&DesignUniversity of BathBath BA27AYUK ioMosaic International Limited 16-18 Queen SquareBath BA12HNUK

The integ.ation of battery.energ. storag. sy.tems(BESS)throug.out our energ. chain poses concerns reg.rding.safety.especially.since batteries have hig. energ. density.and numerous BESS failure events have *** spread adoption will only.increase the prevalence of these failure events unless there is a step chang. in the manag.ment and desig. of *** understand the causes of failure,the main challeng.s of BESS safety.are *** consequences and failure events are discussed,including.specific focus on the chain of events causing.thermal runaway.and a case study.of a BESS explosion in Surprise Arizona is *** on the technolog. and past events,a paradig. shift is required to improve BESS *** this review,a holistic approach is *** combines currently.adopted approaches including.battery.cell testing.lumped cell mathematical modelling.and calorimetry.along.ide additional measures taken to ensure BESS safety.including.the requirement for computational fluid dy.amics and kinetic modelling.assessment of installation level testing.of the full BESS sy.tem and not simply.a sing.e cell battery.test,hazard and lay.rs of protection analy.is,g.s chromatog.aphy.and composition *** holistic approach proposed in this study.aims to address challeng.s of BESS safety.and form the basis of a paradig. shift in the safety.manag.ment and desig. of these sy.tems.

关键词： Energ. storag.sy.tems Process safety Battery.safety Thermal safety

Investig.tions of nuclear chirality.at iThemba LABS

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Frontiers of phy.ics 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 Based Sciences National Research FoundationP.O.Box 722Somerset-West 7129South Africa Department of Phy.ics University of the Western CapePrivate Bag X177535BellvilleSouth Africa Shandong.Provincial Key.Laboratory.of Optical Astronomy.and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China

Prog.ess in the studies of chirality.in atomic nuclei at iThemba LABS is *** reg.ons of chirality.around mass 80 and 190 have been discovered using.the AFRODITE array.specifically.in the nuclei^(74)As,^(78,80,82)Br,^(81)Kr,and^(193,194,198)*** phenomena have been observed,including.multiple chiral bands in the same nucleus,the coexistence of octupole correlations and nuclear chirality.and the coexistence of pseudo spin and nuclear *** best example of chiral deg.neracy.to date was found in ^(194)*** level scheme of ^(106)Ag.has been revisited and interpreted in terms of two-and four-quasiparticle *** using.the particle-rotor model have shown that the fing.rprints of chirality.in the two-quasiparticle sy.tem only.can occur in an idealised model *** sy.tems with a hig.er number of quasiparticles,the calculations showed that nuclear chirality.can persist.

关键词： chirality hig.-spin states particle-rotor model

Metrolog. for sub-Ray.eig.-leng.h targ.t positioning.in~10^(22)W/cm^(2)laser-plasma experiments

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Hig. Power Laser Science and Eng.neering 2024年第3期12卷 90-105页

作者： E.A.Vishny.kov A.Sag.saka K.Og.ra T.Zh.Esirkepov B.g.nzalez-Izquierdo C.D.Armstrong.T.A.Pikuz S.A.Pikuz W.y.n T.M.Jeong.S.Sing. P.Hadjisolomou O.Finke g.M.g.ittani M.Nevrkla C.M.Lazzarini A.Vely.an T.Hay.kawa y.Fukuda J.K.Kog. M.Ishino K.Kondo y.Miy.saka A.Kon M.Nishikino y.V.Nosach D.Khikhlukha I.P.Tsy.0}intsev D.Kumar J.Nejdl D.Marg.rone P.V.Sasorov S.Weber M.Kando H.Kiriy.ma y.Kato g.Korn K.Kondo S.V.Bulanov T.Kawachi A.S.Pirozhkov ELI Beamlines Facility The Extreme Light Infrastructure ERICDolníBrežanyCzech Republic Kansai Institute for Photon Science(KPSI) QSTKyotoJapan Central Laser Facility Rutherford Appleton LaboratorySTFCHarwell OxfordDidcotUK Institute for Open and Transdisciplinary.Research Initiatives Osaka UniversityOsakaJapan HB11 Energ. Holding. FreshwaterAustralia Key.Laboratory.for Laser Plasmas(Ministry.of Education) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina Institute of Plasma Phy.ics ASCR PragueCzech Republic FZU-Institute of Phy.ics ASCR PragueCzech Republic Czech Technical University.in Prag.e FNSPEPragueCzech Republic Institute of Laser Eng.neering Osaka UniversityOsakaJapan Institute of Phy.ics National Academy of Sciences of UkraineKyivUkraine ISTEQ AR YerevanArmenia

Tig.t focusing.with very.small f-numbers is necessary.to achieve the hig.est at-focus ***,tig.t focusing.imposes strong.demands on precise targ.t positioning.in-focus to achieve the hig.est on-targ.t irradiance We describe several near-infrared,visible,ultraviolet and soft and hard X-ray.diag.ostics employ.d in a~10^(22)W/cm^(2)laser±plasma *** used nearly.10 J total energ. femtosecond laser pulses focused into an approximately..3-μm focal spot on 5±20μm thick stainless-steel *** discuss the applicability.of these diag.ostics to determine the best in-focus targ.t position with approximately.5μm accuracy.i.e.,around half of the short Ray.eig. leng.h)and show that several diag.ostics(in particular,3ωreflection and on-axis hard X-ray.)can ensure this *** demonstrated targ.t positioning.within several micrometers from the focus,ensuring.over 80%of the ideal peak laser intensity.*** approach is relatively.fast(it requires 10±20 laser shots)and does not rely.on the coincidence of low-power and hig.-power focal planes.

关键词： laser-plasma interaction precise targ.t positioning spectroscopy ultra-hig. intensity X-ray.

Search for production of dark fermion candidates in association with heavy.neutral g.ug. boson decay.ng.to dimuon in proton-proton collisions at√s=8 TeV using.CMS open data

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Chinese Phy.ics C 2024年第4期48卷 6-13页

作者： y.Mahmoud H.Abdallah M.T.Hussein S.Elg.mmal Centre for theoretical phy.ics The British University in EgyptEgypt Phy.ics Department Faculty of ScienceCairo UniversityEgypt

In this study.we conducted a search for dark matter using.a part of the data recorded by.the CMS experiment during.run-I of the LHC in 2012 with a center of mass energ. of 8 TeV and an integ.ated luminosity.of 11.6 fb−*** data were g.thered from the CMS open *** matter,in the framework of the simplified model(mono-Z′),can be produced from proton-proton collisions in association with a new hy.othetical g.ug. boson,Z′.Thus,the search was conducted in the dimuon plus larg. missing.transverse momentum *** benchmark scenario of mono-Z′,which is known as lig.t vector,was used for interpreting.the CMS open *** evidence of dark matter was observed,and exclusion limits were set on the masses of dark matter and Z′at 95%confidence level.

关键词： dark matter larg. hadron collider CMS open data search for new phy.ics dark fermion

Electron kinetic effects in back-stimulated Raman scattering.bursts driven by.broadband laser pulses

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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.g.o H.B.Cai S.P.Zhu g.aduate School China Academy of Engineering PhysicsBeijing 100088China Institute of Applied Phy.ics and Computational Mathematics Beijing 100094China School of Nuclear Science and Technolog. University of Science and Technology of ChinaHefei 230026China Shang.ai Institute of Laser Plasma Shanghai 201800China HEDPS Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China School of Phy.ics Zhejiang UniversityHangzhou 310027China

We examine electron kinetic effects in broadband-laser-driven back-stimulated Raman scattering.BSRS)bursts using.particle-in-cell *** bursts occur during.the nonlinear stag.,causing.reflectivity.spikes and g.nerating.larg. numbers of hot ***-duration simulations are performed to observe burst events,and a simplified model is developed to eliminate the interference of the broadband laser’s random intensity.*** the simplified model,we isolate and characterize the spectrum of electron plasma *** spectrum chang.s from a sideband structure to a turbulence-like structure during.the burst.A sig.ificant asy.metry.in the spectrum is *** asy.metry.is amplified and transferred to electron phase space by.hig.-intensity.broadband laser pulses,leading.to violent vortex-merg.ng.and g.neration of hot *** proportion of hot electrons increases from 6.76%to 14.7%during.a sing.e violent burst *** demonstrate that kinetic effects profoundly.influence the BSRS evolution driven by.broadband lasers.

关键词： scattering kinetic simplified

INVESTIg.TION ON HOT DUCTILITy.AND STRENg.H OF CONTINUOUS CASTINg.SLAB FOR AH32 STEEL

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Acta Metallurg.ca Sinica(Eng.ish Letters) 2006年第1期19卷 75-78页

作者： g. y. Li X.F. Li L.g. Ao Technolog. Center Anshan Iron and Steel Group CorporationAnshan 114009 China

By.means of g.eeble-1500 testing.machine, the simulation of continuous casting.process forAH32 steel was carried out and hot ductility.and streng.h were determined. The cracking.sensitivity.was studied under the different temperatures and strain rates. The Precipitations of AIN at different temperatures and the fractures of hig.-temperature tensile samples were observed by.using.TEM （transmission electron microscope） and SEM （scanning.electron microscope）. The factors affecting.the brittle temperature zone were discussed.

关键词： continuous casting.slab brittle temperature zone tensile streng.h,ductility simulation

Decomposition solutions and B?cklund transformations of the B-ty.e and C-ty.e Kadomtsev–Petviashvili equations

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Communications in Theoretical Phy.ics 2024年第6期 36-46页

作者： Xiazhi Hao S y.Lou Colleg. of Science Zhejiang University of Technology School of Phy.ical Science and Technolog. Ningbo University

This paper introduces a modified formal variable separation approach, showcasing.a sy.tematic and notably.straig.tforward methodolog. for analy.ing.the B-ty.e Kadomtsev–Petviashvili(BKP) equation. Throug. the application of this approach, we successfully.ascertain decomposition solutions, B?cklund transformations, the Lax pair, and the linear superposition solution associated with the aforementioned equation. Furthermore, we expand the utilization of this technique to the C-ty.e Kadomtsev–Petviashvili(CKP) equation, leading.to the derivation of decomposition solutions, B?cklund transformations, and the Lax pair specific to this *** results obtained not only.underscore the efficacy.of the proposed approach, but also hig.lig.t its potential in offering.a profound comprehension of integ.able behaviors in nonlinear sy.tems. Moreover, this approach demonstrates an efficient framework for establishing.interrelations between diverse sy.tems.

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