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Thermo-kinetic characteristics on stabilizing hetero-phase interface of metal matrix composites by.cry.tal plasticity.finite 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 solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Analy.ical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China

Using dislocation-based constitutive modeling in three-dimension cry.tal plasticity.finite element(3D CPFE)simulations,co-deformation and instability.of hetero-phase interface in different material sy.tems were herein studied for poly.ry.talline metal matrix composites(MMCs).Local stress and strain fields in two ty.es of 3lay.r MMCs such as fcc/fcc Cu-Ag and fcc/bcc Cu-Nb have been predicted under simple compressive ***,more severe strain-induced interface instability.can be observed in the fcc/bcc sy.tems than in the fcc/fcc sy.tems upon refining to metallic nanolay.red composites(MNCs).by.detailed analy.is of stress and strain localization,it has been demonstrated that the interface instability.is alway. accompanied by.high-stress concentration,i.e.,thermody.amic characteristics,or high strain prevention i.e.,kinetic characteristics,at the hetero-phase *** then follows that the thermody.amic driving forceG and the kinetic energy.barrier Q during dislocation and shear banding can be adopted to classify.the deformation modes,following the so-called thermo-kinetic *** by.inserting a high density.of high-energy.interfaces into the Cu-Nb composites,such thermo-kinetic integration at the hetero-phase interface allows a successful establishment of MMCs with the high△G-high Q deformation mode,which ensures high hardening and uniform strain distri-bution,thus efficiently.suppressing the shear band,stabilizing the hetero-phase interface,and obtaining an exceptional combination in strength and *** hetero-phase interface chosen by.a couple of thermody.amics and kinetics can be defined as breaking the thermo-kinetic correlation and has been proposed for artificially.designing MNCs.

关键词： Thermody.amics and kinetics Phy.ics-based constitutive modeling Hetero-phase interface Cry.tal plasticity.finite element

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Decomposition solutions and bäcklund 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76卷 34-44页

作者： Xiazhi Hao s y.Lou College of science Zhejiang University of TechnologyHangzhou 310014China school of Phy.ical science and Technology Ningbo UniversityNingbo 315211China

This paper introduces a modified formal variable separation approach,showcasing a sy.tematic and notably.straightforward methodology.for analy.ing the b-ty.e Kadomtsev-Petviashvili(bKP)*** the application of this approach,we successfully.ascertain decomposition solutions,bäcklund transformations,the Lax pair,and the linear superposition solution associated with the aforementioned ***,we expand the utilization of this technique to the C-ty.e Kadomtsev-Petviashvili(CKP)equation,leading to the derivation of decomposition solutions,bäcklund transformations,and the Lax pair specific to this *** results obtained not only.underscore the efficacy.of the proposed approach,but also highlight its potential in offering a profound comprehension of integrable behaviors in nonlinear ***,this approach demonstrates an efficient framework for establishing interrelations between diverse sy.tems.

关键词： decomposition solution backlund transformation Lax pair linear superposition solution

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

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Journal of Materials science & 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 biobased Materials and Energy.of Ministry.of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China school of Phy.ics and Optoelectronics South China University of TechnologyGuangzhou 510640China school of Chemical Engineering and Energy.Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity.of semiconductors to visible and infrared light is a key.constraint on the utilization of light energy.in photocataly.ic *** photocataly.ts with full-spectrum absorption through surface engineering is an effective approach to fully.harnessing light energy.in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/Cds heterojunction cataly.t is obtained by.in-situ epitaxial growth of two-dimensional(2D)Cds nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-aly.ic hy.rogen evolution capability.upon the heterogeneous *** unique 2D/2D structure effectively.mitigated the recombination of photogenerated carriers,enhancing the photocataly.ic performance of the ***,the composite cataly.t exhibits a significantly.higher surface temperature of 80.4℃under visible light irradiation at an intensity.of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite cataly.t with photothermal ef-fect demonstrates a remarkable hy.rogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of Cds *** study.introduces a novel approach for constructing full-spectrum absorption cataly.ts and expands the application of the photothermal effect in photocataly.ic hy.rogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocataly.t Hy.rogen evolution

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Rescattering of stimulated Raman side scattering in nonuniform 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.y.o C.Z.Xiao J.F.My.tt school of Phy.ics and Electronics Hunan UniversityChangsha 410082China Institute of Applied Phy.ics and Computational Mathematics Beijing 100094China school 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

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

关键词： nonuniform acceleration scattering

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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.Gao H.b.Cai s.P.Zhu Graduate school China Academy of Engineering PhysicsBeijing 100088China Institute of Applied Phy.ics and Computational Mathematics Beijing 100094China school of Nuclear science and Technology University of Science and Technology of ChinaHefei 230026China shanghai 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 stage,causing reflectivity.spikes and generating large 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 changes from a sideband structure to a turbulence-like structure during the burst.A significant asy.metry.in the spectrum is *** asy.metry.is amplified and transferred to electron phase space by.high-intensity.broadband laser pulses,leading to violent vortex-merging and generation of hot *** proportion of hot electrons increases from 6.76%to 14.7%during a single violent burst *** demonstrate that kinetic effects profoundly.influence the bsRs evolution driven by.broadband lasers.

关键词： scattering kinetic simplified

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Quantized autoencoder(QAE)intrusion detection sy.tem for anomaly.detection in resource-constrained loT devices using RT-loT2022 dataset

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Cy.ersecurity 2024年第2期7卷 13-27页

作者： b s sharmila Rohini Nagapadma Depatment of Electronics and Communication Engineering The National Institute of EngineeringMysoreKarnataka 570008India

In recent y.ars,many.researchers focused on unsupervised learning for network anomaly.detection in edge devices to identify.*** deploy.ent of the unsupervised autoencoder model is computationally.expensive in resource-constrained edge *** study.proposes quantized autoencoder(QAE)model for intrusion detection sy.tems to detect *** is an optimization model derived from autoencoders that incorporate pruning,clustering,and integer quantization *** autoencoder uint8(QAE-u8)and quantized autoencoder float16(QAE-f16)are two variants of QAE built to deploy.computationally.expensive Al models into Edge ***,we have generated a Real-Time Internet of Things 2022 dataset for normal and attack *** autoencoder model operates on normal traffic during the training *** same model is then used to reconstruct anomaly.traffic under the assumption that the reconstruction error(RE)of the anomaly.will be high,which helps to identify.the ***,we study.the performance of the autoencoders,QAE-u8,and QAE-f16 using accuracy.precision,recall,and F1 score through an extensive experimental *** showed that QAE-u8 outperforms all other models with a reduction of 70.01%in average memory.utilization,92.23%in memory.size compression,and 27.94%in peak CPU ***,the proposed QAE-u8 model is more suitable for deploy.ent on resource-constrained IoT edge devices.

关键词： IoT constrained sy.tem

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Fuzzy.Reliability.and Availability.of sy.tem under a Calendar-based Inspection Involving Multiple Failures and Its Application to Wind Turbine sy.tem

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Journal of sy.tems science and sy.tems Engineering 2024年第2期33卷 187-206页

作者： Mintu Kumar Himani Pant s.b.singh Department of Mathematics statistics and Computer science G.B.Pant University of AgricultureTechnologyPantnagarUttarakhandIndia

Uncertainty.is an important factor that needs to be considered while analy.ing the performance of any.engineering *** order to quantify.uncertainty.fuzzy.set theory.is frequently.used by.most of researchers,including energy.sy.tem *** to the classical reliability.theory.component lifetimes have crisp parameters,but due to uncertainty.and inaccuracy.in data,it is sometimes very.difficult to determine the exact values of these parameters in real-world *** overcome this difficulty.in the current research,failure and repair rates were taken as triangular fuzzy.numbers to determine the fuzzy.availability.of a sy.tem undergoing calendar-based periodic inspection subject to multiple failure modes(FMs).It was assumed that each component in the sy.tem had an exponential failure rate and repair rate with fuzzy.*** FMs were explicitly.taken into account when a functional state of the sy.tem was *** FM had a random failure *** the occurrence of any.failure,a random time was selected for the relevant corrective repair *** proposed research was studied for one of the major sources of green energy.namely.a wind turbine sy.tem wherein all the derived propositions have been implemented on it.

关键词： Fuzzy.reliability fuzzy.availability wind turbine sy.tem multiple failure modes triangular fuzzy.number

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study.of hy.rid nanofluid flow in a stationary.cone-disk sy.tem with temperature-dependent fluid properties

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 677-694页

作者： A.s.JOHN b.MAHANTHEsH G.LORENZINI Center for Mathematical Needs Department of MathematicsCHRIST(Deemed to be University)Karnataka 560029India school of Mathematical and statistical sciences The University of Texas Rio Grande ValleyTexas 78539U.S.A. Department of Engineering and Architecture University of ParmaParma 43124Italy

Cone-disk sy.tems find frequent use such as conical diffusers,medical devices,various rheometric,and viscosimetry.*** this study.we investigate the three-dimensional flow of a water-based Ag-Mg O hy.rid nanofluid in a static cone-disk sy.tem while considering temperature-dependent fluid *** the variable fluid properties affect the dy.amics and heat transfer features is studied by.Rey.olds's linearized model for variable viscosity.and Chiam's model for variable thermal *** single-phase nanofluid model is utilized to describe convective heat transfer in hy.rid nanofluids,incorporating the experimental *** model is developed as a coupled sy.tem of convective-diffusion equations,encompassing the conservation of momentum and the conservation of thermal energy.in conjunction with an incompressibility.condition.A self-similar model is developed by.the Lie-group scaling transformations,and the subsequent self-similar equations are then solved *** influence of variable fluid parameters on both swirling and non-swirling flow cases is ***,the Nusselt number for the disk surface is *** is found that an increase in the temperature-dependent viscosity.parameter enhances heat transfer characteristics in the static cone-disk sy.tem,while the thermal conductivity.parameter has the opposite effect.

关键词： hy.rid nanofluid cone-disk sy.tem laminar flow variable fluid property Nusselt number

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Astrophy.ical s-factor and reaction rate for 15N(p,γ)16O within the modified potential cluster model

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Chinese Phy.ics C 2024年第4期48卷 130-145页

作者： s.b.Dubovichenko A.s.Tkachenko R.y..Kezerashvili N.A.burkova b.M.y.leusheva Fesenkov Astrophy.ical Institute 050020 AlmatyKazakhstan New y.rk City.College of Technology City University of New YorkBrooklyn11201 New YorkUSA Graduate school and University.Center City University of New York10016 New YorkUSA al-Farabi Kazakh National University 050040 AlmatyKazakhstan

We study.radiative p^(15)N capture on the ground state of ^(16)O at stellar energies within the framework of a modified potential cluster model(MPCM)with forbidden states,including low-ly.ng *** investigation of the ^(15)N(p,γ0)^(16)O reaction includes the consideration of ^(3)s_(1) resonances due to E1 transitions and the contribution of the ^(3)P_(1) scattering wave in the p+^(15)N channel due to the ^(3)P_(1)→^(3)P_(0)M1 *** calculated the astrophy.ical low-energy.s-factor,and the extrapolated s(0)turned out to be within 34.7−40.4 keV·*** important role of the asy.ptotic constant(AC)for the ^(15)N(p,γ0)16O process with interfering ^(3)s_(1)(312)and ^(3)s_(1)(962)resonances is elucidated.A comparison of our calculation for the s-factor with existing experimental and theoretical data is addressed,and a reasonable agreement is *** reaction rate is calculated and compared with the existing *** has negligible dependence on the variation of AC but shows a strong impact of the interference of ^(3)s_(1)(312)and ^(3)s_(1)(962)resonances in reference to the CNO Gamow windows,especially.at low *** estimate the contribution of cascade transitions to the reaction rate based on the exclusive experimental data from ***.C.85,065810(2012).The reaction rate enhancement due to the cascade transitions is observed from T_(9)>0.3 and reaches the maximum factor~1.3 at T_(9)=*** present the Gamow energy.window and a comparison of rates for radiative proton capture reactions ^(12)N(p,γ)^(13)O,^(13)N(p,γ)^(14)O,^(14)N(p,γ)^(15)O,and ^(15)N(p,γ)^(16)O obtained in the framework of the MPCM and provide the temperature windows,prevalence,and significance of each process.

关键词： low and astrophy.ical energies p^(15)N sy.tem thermonuclear reaction rate potential cluster model CNO-cy.le

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Management of a patient with an unusual trajectory.of a temporary.trans-venous pacing lead

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World Journal of Cardiology 2024年第6期16卷 314-317页

作者： Metesh acharya Ethan Kavanagh sheena Garg Davorin sef Fabio De Robertis Department of Cardiac surgery University Hospitals of Leicester NHS TrustLeicester LE39QPUnited Kingdom Department of Cardiac surgery King’s College LondonLondon WC2R 2LSUnited Kingdom Department of Cardiac surgery Royal Brompton and Harefield HospitalsLondon UB96JHUnited Kingdom

Perforation of the right ventricle during placement of pacing wires is a welldocumented complication and can be potentially.*** of temporary.pacemaker,helical screw leads and steroids use prior to implant are recognised as risk factors for development of post-permanent pacemaker *** reported an unusual case of pacing wire perforating interventricular septum into the left ventricle that occurred during the implant procedure performed in another *** the preoperative work-up and transfer to our tertiary.cardiothoracic centre,the patient underwent successful surgical *** conclusion,early.recognition and timely.diagnosis using advanced multimodality.imaging can guide surgical intervention and prevent unfavourable consequences of device-related complications.

关键词： Ventricular perforation Lead perforation Pacing

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