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Thermo-kinetic characteristics on stabilizing hetero-phase interf.ce of.metal matrix composites by crystal plasticity f.nite element method

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journal of.Materials Science & Technology 2024年第2期169卷 53-67页

作者： y.B.Zhang S.j.Song f.Liu State Key Laboratory of.Solidif.cation Processing Northwestern Polytechnical UniversityXi’an 710072China Analytical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China

Using dislocation-based constitutive modeling in three-dimension crystal plasticity f.nite element(3D CPf.)simulations,co-def.rmation and instability of.hetero-phase interf.ce in dif.erent material systems were herein studied f.r polycrystalline metal matrix composites(MMCs).Local stress and strain f.elds in two types of.3layer MMCs such as f.c/f.c Cu-Ag and f.c/bcc Cu-Nb have been predicted under simple compressive ***,more severe strain-induced interf.ce instability can be observed in the f.c/bcc systems than in the f.c/f.c systems upon ref.ning to metallic nanolayered composites(MNCs).By detailed analysis of.stress and strain localization,it has been demonstrated that the interf.ce instability is always accompanied by high-stress concentration,i.e.,thermodynamic characteristics,or high strain prevention i.e.,kinetic characteristics,at the hetero-phase *** then f.llows that the thermodynamic driving f.rceG and the kinetic energy barrier Q during dislocation and shear banding can be adopted to classif. the def.rmation modes,f.llowing the so-called thermo-kinetic *** by inserting a high density of.high-energy interf.ces into the Cu-Nb composites,such thermo-kinetic integration at the hetero-phase interf.ce allows a successf.l establishment of.MMCs with the high△G-high Q def.rmation mode,which ensures high hardening and unif.rm strain distri-bution,thus ef.iciently suppressing the shear band,stabilizing the hetero-phase interf.ce,and obtaining an exceptional combination in strength and *** hetero-phase interf.ce chosen by a couple of.thermodynamics and kinetics can be def.ned as breaking the thermo-kinetic correlation and has been proposed f.r artif.cially designing MNCs.

关键词： Thermodynamics and kinetics Physics-based constitutive modeling Hetero-phase interf.ce Crystal plasticity f.nite element

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Resistive f.eld generation in intense proton beam interaction with solid targets

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Matter and Radiation at Extremes 2024年第1期9卷 35-43页

作者： W.Q.Wang j.j.Honrubia y.yin X.H.yang f.Q.Shao Department of.Physics National University of Defense TechnologyHunanChina ETSI Aeronáutica y del Espacio Universidad Politécnica de MadridMadridSpain Department of.Nuclear Science and Technology National University of Defense TechnologyHunanChina

The Brown-Preston-Singleton(BPS)stopping power model is added to our previously developed hybrid code to model ion beam-plasma *** simulations show that both resistive f.eld and ion scattering ef.ects are important f.r proton beam transport in a solid target,in which they compete with each *** the target is not completely ionized,the self.generated resistive f.eld ef.ect dominates over the ion scattering ***,when the target is completely ionized,this situation is ***,it is f.und that Ohmic heating is important f.r higher current densities and materials with high *** energy f.action deposited as Ohmic heating can be as high as 20%-30%.Typical ion divergences with half.angles of.about 5°-10°will modif. the proton energy deposition substantially and should be taken into account.

关键词： interaction beam intense

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A New Method f.r Deriving High-Vertical-Resolution Wind Vector Data f.om the L-Band Radar Sounding System in China

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Advances in Atmospheric Sciences 2024年第11期41卷 2192-2202页

作者： yuan f. Zhou Z. Liao j. National Meteorological Inf.rmation Center China Meteorological Administration Beijing 100081 China

High-vertical-resolution radiosonde wind data are highly valuable f.r describing the dynamics of.the meso- and microscale atmosphere. However, the current algorithm used in China’s L-band radar sounding system f.r calculating high-vertical-resolution wind vectors excessively smooths the data, resulting in signif.cant underestimation of.the calculated kinetic energy of.gravity waves compared to similar products f.om other countries, which greatly limits the ef.ective utilization of.the data. To address this issue, this study proposes a novel method to calculate high-vertical-resolution wind vectors that utilizes the elevation angle, azimuth angle, and slant range f.om L-band radar. In order to obtain wind data with a stable quality, a two-step automatic quality control procedure, including the RMSE-f.(root-mean-square error f. test and elemental consistency test are f.rst applied to the slant range data, to eliminate continuous erroneous data caused by unstable signals or radar malf.nctions. Then, a wind calculation scheme based on a sliding second-order polynomial f.tting is utilized to derive the high-vertical-resolution radiosonde wind vectors. The evaluation results demonstrate that the wind data obtained through the proposed method show a high level of.consistency with the high-resolution wind data observed using the Vaisala Global Positioning System and the data observed by the new Beidou Navigation Sounding System. The calculation of.the kinetic energy of.gravity waves in the recalculated wind data also reaches a level comparable to the Vaisala observations. © Institute of.Atmospheric Physics/Chinese Academy of.Sciences, and Science Press 2024.

关键词： high-vertical-resolution radiosonde wind vectors L-band radar sounding system polynomial f.tting quality control upper air

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Is Peer Victimization Associated with Higher Online Trolling among Adolescents? The Mediation of.Hostile Attribution Bias and the Moderation of.Trait Mindf.lness

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International journal of.Mental Health Promotion 2024年第8期26卷 623-632页

作者： Qiu y. Sun Q. Zhou j. jiang N. Zeng W. Wu B. Li f. School of.Psychology Sichuan Normal University Chengdu 610066 China Center of.Adolescent Growth Services Sichuan Dazhu Middle School Dazhou 635100 China Center of.Mental Health Education Guangzhou University of Chinese Medicine Guangzhou 510470 China Sichuan Key Laboratory of.Psychology and Behavior of.Discipline Inspection and Supervision Sichuan Normal University Chengdu 610066 China

Background: In recent years, online trolling has garnered signif.cant attention due to its detrimental ef.ects on mental health and social well-being. The current study examined the inf.uence of.peer victimization on adolescent online trolling behavior, proposing that hostile attribution bias mediated this relationship and that trait mindf.lness moderated both the direct and indirect ef.ects. Methods: A total of.833 Chinese adolescents completed the measurements of.peer victimization, hostile attribution bias, trait mindf.lness, and online trolling. Moderated mediation analysis was perf.rmed to examine the relationships between these variables. Results: Af.er controlling f.r gender and residential address, the study f.und a signif.cant positive correlation between peer victimization and online trolling, with hostile attribution bias serving as a mediator. In addition, trait mindf.lness moderated the direct relationship between peer victimization and online trolling. Specif.cally, the ef.ect of.peer victimization on online trolling was attenuated when adolescents had high levels of.trait mindf.lness. The results of.the study emphasized the joint role of.peer and personal f.ctors in adolescents’ online trolling behavior and provide certain strategies f.r intervening in adolescents’ online trolling behavior. Conclusion: The results of.the study suggest that strategies f.cusing on peer support and mindf.lness training can have a positive impact on reducing online trolling behavior, promoting adolescents’ mental health, and their long-term development. © 2024 The Authors.

关键词： adolescent hostile attribution bias Online trolling peer victimization trait mindf.lness

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Rescattering of.stimulated Raman side scattering in nonunif.rm plasmas

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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.yao C.Z.Xiao j.f.Myatt School of.Physics and Electronics Hunan UniversityChangsha 410082China Institute of.Applied Physics and Computational Mathematics Beijing 100094China School of.Electrical and Inf.rmation Engineering Anhui University of Science and TechnologyHuainanAnhui 232001China Department of.Electrical and Computer Engineering University of Alberta9211116 St.NWEdmontonAlberta T6G 1H9Canada

Rescattering of.stimulated Raman side scattering(SRSS)is observed f.r the f.rst time via two-dimensional(2D)particle-in-cell(PIC)*** construct a theoretical model f.r the rescattering process,which can predict the region of.occurrence of.mth-order SRSS and estimate its *** rescattering process is identif.ed by the 2D PIC simulations under typical conditions of.a direct-drive inertial conf.nement f.sion *** electrons produced by second-order SRSS propagate nearly perpendicular to the density gradient and gain nearly the same energy as in f.rst-order SRSS,but there is no cascade acceleration to produce superhot *** studies f.r a wide range of.ignition conditions show that SRSS and associated rescatterings are robust and important processes in inertial conf.nement f.sion.

关键词： nonunif.rm acceleration scattering

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miniSCIDOM: a scintillator-based tomograph f.r volumetric dose reconstruction of.single laser-driven proton bunches

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High Power Laser Science and Engineering 2024年第2期12卷 41-50页

作者： A.Corvino M.Reimold E.Beyreuther f.-E.Brack f.Kroll j.Pawelke j.D.Schilz M.Schneider U.Schramm M.E.P.Umlandt K.Zeil T.Ziegler j.Metzkes-Ng Helmholtz-Zentrum Dresden–Rossendorf DresdenGermany Technische Universität Dresden DresdenGermany OncoRay–National Center f.r Radiation Research in Oncology Faculty of Medicine and University Hospital Carl Gustav CarusTUD Dresden University of TechnologyHelmholtz-Zentrum Dresden–RossendorfDresdenGermany Current af.iliation:Institut Curie UniversitéPSLCNRS UMR3347OrsayFrance Current af.iliation:Universitätsklinikum f.eiburg FreiburgGermany

Laser plasma accelerators(LPAs)enable the generation of.intense and short proton bunches on a micrometre scale,thus of.ering new experimental capabilities to research f.elds such as ultra-high dose rate radiobiology or material *** spectrally broadband,laser-accelerated proton bunches allow f.r tailored volumetric dose deposition in a sample via single bunches to excite or probe specif.c sample *** rising number of.such experiments indicates a need f.r diagnostics providing spatially resolved characterization of.dose distributions with volumes of.approximately 1 cm^(3) f.r single proton bunches to allow f.r f.st online *** we present the scintillator-based miniSCIDOM detector f.r online single-bunch tomographic reconstruction of.dose distributions in volumes of.up to approximately 1 cm^(3).The detector achieves a spatial resolution below 500μm and a sensitivity of.100 *** detector perf.rmance is tested at a proton therapy cyclotron and an LPA proton *** experiments’primary f.cus is the characterization of.the scintillator’s ionization quenching behaviour.

关键词： beam monitoring detectors laser-driven proton beams scintillator-based diagnostics ultra-high dose rate

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STCf.conceptual design report (Volume 1): Physics & detector

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f.ontiers of.physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.H.Bu f.M.Cai H.Cai j.j.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.y.Chen H.Chen H.X.Chen j.f.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.f.Chen X.R.Chen y.Chen y.Q.Chen H.y.Cheng j.Cheng S.Cheng T.G.Cheng j.P.Dai L.y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko j.M.Dias D.Z.Ding L.y.Dong W.H.Dong V.Druzhinin D.S.Du y.j.Du Z.G.Du L.M.Duan D.Epif.nov y.L.f.n S.S.f.ng Z.j.f.ng G.f.dotovich C.Q.f.ng X.f.ng y.T.f.ng j.L.f. j.Gao y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl j.L.Gu A.Guevara L.C.Gui A.Q.Guo f.K.Guo j.C.Guo j.Guo y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao j.B.He S.Q.He X.G.He y.L.He Z.B.He Z.X.Heng B.L.Hou T.j.Hou y.R.Hou C.y.Hu H.M.Hu K.Hu R.j.Hu W.H.Hu X.H.Hu y.C.Hu j.Hua G.S.Huang j.S.Huang M.Huang Q.y.Huang W.Q.Huang X.T.Huang X.j.Huang y.B.Huang y.S.Huang N.Hüsken V.Ivanov Q.P.ji j.j.jia S.jia Z.K.jia H.B.jiang j.jiang S.Z.jiang j.B.jiao Z.jiao H.j.jing X.L.Kang X.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev C.H.Li C.Li D.y.Li f.Li G.Li G.Li H.B.Li H.Li H.N.Li H.j.Li H.L.Li j.M.Li j.Li L.Li L.Li L.y.Li N.Li P.R.Li R.H.Li S.Li T.Li W.j.Li X.Li X.H.Li X.Q.Li X.H.Li y.Li y.y.Li Z.j.Li H.Liang j.H.Liang y.T.Liang G.R.Liao L.Z.Liao y.Liao C.X.Lin D.X.Lin X.S.Lin B.j.Liu C.W.Liu D.Liu f.Liu G.M.Liu H.B.Liu j.Liu j.j.Liu j.B.Liu K.Liu K.y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu Z.Q.Liu Z.y.Liu Z.W.Liu I.Logashenko y.Long C.G.Lu j.X.Lu N.Lu Q.f.Lü y.Lu y.Lu Z.Lu P.Lukin f.j.Luo T.Luo X.f.Luo y.H.Luo H.j.Lyu X.R.Lyu j.P.Ma P.Ma y.Ma y.M.Ma f.Maas S.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nef.diev y.Nef.dov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan y.Pan E.Passemar y.P.Pei H.P.Peng L.Peng X.y.Peng X.j.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi y.Q.Qi W.B.Qian y.Qian C.f.Qiao j.j.Qin j.j.Qin L.Q.Qin X.S.Qin T.L.Qiu j.Rademacker C.f.Redmer H.y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of.Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of.Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of.Geosciences Wuhan 430074China China University of.Mining and Technology Xuzhou 221116China École Polytechnique f.dérale de Lausanne(EPf.) LausanneSwitzerland f.dan University Shanghai 200433China Goethe University f.ankf.rt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute f.r Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hef.i University of.Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of.Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of.Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of.Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of.Advanced Science f.cilities Shenzhen 518107China Institute of.High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of.Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of.Physics Academia SinicaTaipeiTaiwan 11529China Institute of.Theoretical Physics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm f.cility(STCf.is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of.mass energy range f.om 2 to 7 GeV with a peak luminosity of.0.5×10^(35) cm^(–2)·s^(–1) or *** STCf.will produce a data sample about a f.ctor of.100 larger than that of.the presentτ-charm f.ctory—the BEPCII,providing a unique platf.rm f.r exploring the asymmetry of.matter-antimatter(charge-parity violation),in-depth studies of.the internal structure of.hadrons and the nature of.non-perturbative strong interactions,as well as searching f.r exotic hadrons and physics beyond the Standard *** STCf.project in China is under development with an extensive R&D *** document presents the physics opportunities at the STCf.describes conceptual designs of.the STCf.detector system,and discusses f.ture plans f.r detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCf.detector conceptual design

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Buechel Pappas Resurf.cing Shoulder Replacement: Evolution and over 40 years of.Clinical Experience

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Open journal of.Orthopedics 2024年第5期14卷 218-228页

作者： f.ederick f. Buechel Michael j. Pappas Rutgers Nj Medical School Newark NJ USA South Mountain Orthopaedic Associates South Orange NJ USA New jersey Institute of.Technology Newark NJ USA

Background: Early exploration of.the semi constrained “f.oating-Socket” total shoulder replacement (TSR) in 1974 led to a prolif.ration of.various unconstrained designs that allowed resection or retention of.the humeral head, depending upon the pathological process involved. Degenerative glenohumeral arthritis with mild to moderate involvement of.subchondral bone allowed f.r a resurf.cing option, while severe humeral head involvement required a partial or f.ll humeral head replacement attached to an intramedullary stem f.r f.xation. All components evolved f.om cemented to cementless application by 1982. The purpose of.this paper is to describe the progression of.Buechel-Pappas (B-P) shoulder replacement development f.om the early 1970’s in both cemented and cement less applications. Methods: Clinical evaluations of.“f.oating-Socket” TSR, f.llowed by B-P stem-type, resurf.cing types, bipolar-type and revision components, all of.which comprise the B-P Shoulder Replacement System, were perf.rmed over a 49-year period. Results: “f.oating-Socket” implants improved the results of.simple, constrained ball-in-socket designs, but generally f.iled by glenoid component loosening in both chimpanzee and human applications. Unconstrained resurf.cing-type components, both anatomical humeral head and f.ll proximal humeral components, were quite successf.l, with minimal f.ilures observed in long-term studies. Bipolar salvage implants, used f.r severe proximal def.ciencies, revisions and massive rotator cuf. arthropathy, were also very successf.l;providing overhead range of.motion in many patients. Conclusions: Resurf.cing hemiarthroplasty, in patients with intact or repairable rotator cuf. mechanisms, gave the most satisf.ctory results and were the least technically complicated to perf.rm, requiring minimal instrumentation. Resurf.cing of.f.ll proximal humeral def.ciencies, using f.moral resurf.cing components, gave similar clinical results to more complex semi-constrained devices,

关键词： Total Shoulder Replacement Resurf.cing Shoulder Replacement

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Numerical analysis of.high‑speed railway slab tracks using calibrated and validated 3D time‑domain modelling

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Railway Engineering Science 2024年第1期32卷 36-58页

作者： A.f.Esen O.Laghrouche P.K.Woodward D.Medina‑Pineda Q.Corbisez j.y.Shih D.P.Connolly Institute f.r High‑Speed Rail and System Integration University of LeedsLeeds LS29JTUK Institute f.r Inf.astructure and Environment Heriot-Watt UniversityEdinburgh EH144ASUK Alstom Transport Saint‑OuenFrance Birmingham Centre f.r Railway Research and Education University of BirminghamBirmingham B152TTUK

Concrete slabs are widely used in modern railways to increase the inherent resilient quality of.the tracks,provide saf. and smooth rides,and reduce the maintenance *** this paper,the elastic perf.rmance of.a novel slab trackf.rm f.r high-speed railways is investigated using three-dimensional f.nite element modelling in *** is then compared to the perf.rmance of.a ballasted ***,slab and ballasted track models are developed to replicate the f.ll-scale testing of.track *** the models are calibrated with the experimental results,the novel slab model is developed and compared against the calibrated slab track *** slab and ballasted track models are then extended to create linear dynamic models,considering the track geodynamics,and simulating train passages at various speeds,f.r which the Ledsgard documented case was used to validate the *** travelling at low and high speeds are analysed to investigate the track def.ections and the wave propagation in the soil,considering the issues associated with critical *** train loading methods are discussed,and the most practical approach is retained and ***,correlations are made between the geotechnical parameters of.modern high-speed rail and conventional *** is f.und that considering the same ground condition,the slab track def.ections are considerably smaller than those of.the ballasted track at high speeds,while they show similar behaviour at low speeds.

关键词： High-speed railways Slab track New ballastless track Ballasted track Critical speeds f.nite element modelling Calibration of.numerical models

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On the analytical solution of.transient f.iction in channel f.ows

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1447-1466页

作者： f.j.GARCíA-GARCíA P.f.RINAS-ALVARINO Department of.Naval&Industrial Engineering Polytechnic School of EngineeringUniversity of A CorunaCampus Industrial de FerrolFerrol 15403A CorunaSpain Integraciones Técnicas de Seguridad S.A.Pol.Ind.Espiritu SantoC/Nobel15Cambre 15650A CorunaSpain

The transient f.iction in channel mean f.ows is the sum of.two contributions,i.e.,the underlying laminar f.ow(ULf.and the purely turbulent component(PTC),and the contributions are analyzed separately by theoretical *** is f.und that,the transient f.iction may be higher or remarkably lower than that in equal-Reynolds number steady-state *** universal time constant f.r plane-parallel laminar f.ows is reported,and the role of.the time constant in a turbulent mean f.ow is *** is shown that the time constant is related to the turbulence's f.ozen ***,a study of.the logarithmic layer during the transient f.ow is accomplished,which shows that the logarithmic layer is destroyed.

关键词： transient f.iction transient f.ow unsteady channel f.ow

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