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Acta Metallurgica Sinica(English Letters) 2018年第6期31卷 623-628页

作者： Y.Zhang M.turghun C.J.Huang t.wang F.F.wang W.Z.Shi Key Laboratory of Optoelectronic Material and Device Shanghai Normal University Mathematics and Science College Shanghai Normal University

FeGa thin film has been deposited on（100）-oriented GaAs and（001）-oriented Si substrates with different film thicknesses and laser energy densities at room temperature by pulsed laser deposition *** structure and static magnetic of FeGa film have great changes depending on the substrate and energy density of pulsed laser.X-ray diffraction reveals the presence of first-order order–disorder structure ofgrain phase and disordered bcc A2 structure on GaAs *** coercivity and remanence of FeGa film on GaAs substrate ratio show a regular dependence on the thickness and energy ***,film on Si substrate did not exhibit structure change,which can be attributed to a large lattice mismatch between FeGa and Si.

关键词： Magnetostrictive film Soft magnetic film texture Galfenol

A GENERALIZAtION OF tHE n-QUEEN PROBLEM

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Systems Science and Mathematical Sciences 1990年第2期3卷 183-192页

作者：乐茂华李慰萱 Edward t.wang Changsha Railway Institute HunanChina Wilfrid Laurier University WaterlooOnt.Canada

A generalization of the well-known n-queen problem is to put N×k‘queens’on an k×nchessboard in such a way that each row and each column contains exactly k‘queens’and eachdiagonal with length from 1 to n and slope either 1 or -1 contains at most k‘queens’.Aconstruction is given to show that this is always possible whenever n≥4 and n≥k≥1.

关键词： Chessboard covering n-queen problem combinatorial configuration

Simulation of cooling channel rheocasting process of A356 aluminum alloy using three-phase volume averaging model

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中国有色金属学会会刊:英文版 2005年第2期15卷 389-394页

作者： t.wang B.Pustal M.Abondano t.Grimmig A.Bührig-Polaczek M.Wu A.Ludwig Foundry Institute Aachen University of TechnologyAachenD-52072Germany Department of Metallurgy University of LeobenLeobenA-8700Austria Research Center of Foundry Engineering Dalian University of TechnologyDalian 116024China

the cooling channel process is a rehocasting method by which the prematerial with globular microstructure can be produced to fit the thixocasting process.A three-phase model based on volume averaging approach is proposed to simulate the cooling channel process of A356 Aluminum *** three phases are liquid,solid and air respectively and treated as separated and interacting continua,sharing a single pressure *** mass,momentum,enthalpy transport equations for each phase are *** developed model can predict the evolution of liquid,solid and air fraction as well as the distribution of grain density and grain *** effect of pouring temperature on the grain density,grain size and solid fraction is analyzed in detail.

关键词： A356 alloy modeling cooling channel three-phase semi-solid

Effect of grain size on the intrinsic mechanical stability of austenite in transformation-induced plasticity steels:the competition between martensite transformation and dislocation slip

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Journal of Materials Science & technology 2023年第31期162卷 38-43页

作者： D.P.Yang t.wang Z.t.Miao P.J.Du G.D.wang H.L.Yi State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

the deformation accompanied by austenite to martensite trans-formation was first studied in Fe-Ni alloys,high-Mn steels,and austenitic stainless steels with a full austenite *** plasticity of these steels can be improved by the trans-formation during deformation and hence they were named as transformation-induced plasticity(tRIP)steels[1].Over the past few decades,a series of tRIP steels with multiphase microstructure for automotive applications were *** steels contain-ing a certain amount of austenite were called tRIP-assisted steels,such as low-alloy tRIP steels[2],carbide-free bainitic steels[3],δ-tRIP steels[4],quenching and partitioning steels[5],and medium-Mn steels[6].the mechanical property of tRIP steels is largely determined by the mechanical stability of austenite[7]which de-pends on the chemical composition[8],grain size[9],orientation[10],and morphology[11]of austenite grains,as well as the nature of neighboring phases[12].In most cases of tRIP-assisted steels,larger austenite grains transform to martensite earlier or faster than smaller austenite grains with the increase of macrostrain[13-18],indicating lower mechanical ***,larger austen-ite grains usually contain less C and Mn[13,17-19]and suffer more strain than smaller grains during deformation[20],it doesn’t mean that grain refinement increases the mechanical stability of austen-ite.

关键词： austenite martensite transformation

Ultrasonic excitation induced nanocrystallization and toughening of Zr46.75Cu46.75Al6.5 bulk metallic glass

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Journal of Materials Science & technology 2020年第10期42卷 157-161页

作者： W.Zhai L.H.Nie X.D.Hui Y.Xiao t.wang B.Wei School of Physical Science and technology Northwestern Polytechnical UniversityXi'an 710072China State Key Laboratory for Advanced Metals and Materials University of Science&Technology BeijingBeijing 100083China

Intensive power ultrasound is introduced to Zr46.75Cu46.75Al6.5bulk metallic glass(BMG)as an easy-procurable,non-destructive physical method to modulate its atomic rearrangement and shear deformation *** microstructure after ultrasonic excitation with amplitude about 15μm in 20 k Hz for 2 h is characterized by large amount of Cu10Zr7 nanocrystals with size of 20–50 nm embedded in the glass *** leads to a sharp increase in the critical stress for the first pop-in event of shear banding,and thus simultaneously improves both compressive plasticity and yield *** findings provide a novel approach for overcoming the strength-ductility trade-off dilemma.

关键词： Bulk metallic glass Nanocrystallization Plasticity toughness Ultrasound

Coarsening Kinetics of a two Phase Mixture with Highly Disparate Diffusion Mobility

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Communications in Computational Physics 2010年第7期8卷 249-264页

作者： G.Sheng t.wang Q.Du K.G.wang Z.K.Liu L.Q.Chen Department of Materials Science and Engineering Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Materials Science and Engineering Iowa State UniversityAmesIA 50011USA Department of Mathematics Pennsylvania State UniversityUniversity ParkPA 16802USA Physics and Space Science Department Materials Science&Nanotechnology InstituteFlorida Institute of TechnologyMelbourneFL 32901USA

the coarsening kinetics of a two-phase mixture with a large diffusional mobility disparity between the two phases is studied using a variable-mobility Cahn Hilliard *** semi-implicit spectral numerical technique was employed,and a number of interpolation functions are considered for describing the change in diffusion mobility across the interface boundary from one phase to *** coarsening rate of domain size was measured using both structure and pair correlation functions as well as the direct computation of particle sizes in real space for the case that the coarsening phase consists of dispersed *** discovered that the average size(R)versus time(t)follows the R^(10/3)∝t law,in contrast to the conventional LSW theory,R^(3)∝t,and the interface-diffusion dominated two-phase coarsening,R^(4)∝t.

关键词： Coarsening kinetics Cahn-Hilliard equation phase-field method computer simulation

Embedding laser-generated Cdte nanocrystals into ultrathin ZnIn_(2)S_(4) nanosheets with sulfur vacancies for boosted photocatalytic H_(2) evolution

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Journal of Materials Science & technology 2023年第35期166卷 113-122页

作者： Z.G.tai G.t.Sun X.H.Zhang X.B.Yang t.wang Z.Y.Fang Q.Ye L.C.Jia H.Q.wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

to suppress the inner charge recombination and inject vast electrons,Cdte nanocrystals are embedded into ultrathin ZnIn_(2)S_(4) nanosheets to construct ZnIn_(2)S_(4)/Cdte heterostructures,where the nanocrystals are generated by a laser irradiation *** optimal ZnIn_(2)S_(4)/Cdte heterojunction exhibits an excellent catalytic activity of 24.3 mmol/h/g,which is relatively high among the ZnIn_(2)S_(4)-based photocatalysts with-out noble *** enhancement is ascribed to a win-win mechanism of nanoscale heterojunctions and sulfur *** strong electron coupling effect,which is verified by density functional the-ory(DFt)calculations,impels the photo-generated electrons transfer from Cdte to ZnIn_(2)S_(4),boosting the charge ***,the sulfur vacancies existing in ZnIn_(2)S_(4) can capture photoelectrons and act as active sites,facilitating the H_(2) generation *** addition,the ZnIn_(2)S_(4) base and the ZnIn_(2)S_(4)/Cdte heterojunction also possess an evident photothermal effect and renewable cycle phenomena,enhancing the photocatalytic *** research provides new insights into the regulation of charge transfer through embedding nanocrystals.

关键词： Photocatalysis Hydrogen evolution Laser irradiation Heterostructure Sulfur vacancies

Rheological Studies of Unpolymerized Light-cured Composite Resin Rein forced with Retentive Filler ***,***,***

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Rheological Studies of Unpolymerized Light-cured Composite R...

FASt Pulsar *** Profiles of 682 Pulsars

海南省口腔医学会第二次会员代表大会暨学术会议

作者： P.Xu,H.C.Xu,t.wang Dental Materials Laboratory,Peking University School of Stomatology,Beijing 100081,P.R.China

the goal of this study was to investigate the rheological properties of unpolymerized light-cured composite resin reinforced with retentive filler (RF) and its rheological difference with that reinforced with normal filler (NF).the light-cured composite resins employed in this study were composite resin reinforced with RF (Experimental composite resin I,ECR-Ⅰ) and composite resin reinforced with NF (Experimental composite resin Ⅱ,ECR-Ⅱ).the rheological properties of ECR-Ⅰor ECR-Ⅱ,such as viscosity,shear rate,shear stress and shear strain,were measured with dynamic stress rheometer at 25 *** viscosity,shear rate,shear stress and shear strain of these composites were compared and *** results indicated ECR-Ⅰexhibits dilatant nature,and ECR-Ⅱnearly Newtonian;the viscosity o fECR-Ⅰis larger than that of ECR-Ⅱ,and the shape of ECR-Ⅰis more stable than that of ECR-Ⅱin room ***,ECR-Ⅰand ECR-Ⅱneed different manipulation during clinical use.

关键词： Dental materials Composite resin Viscosity Rheology Retentive filler

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Research in Astronomy and Astrophysics 2023年第10期23卷 71-175页

作者： P.F.wang J.L.Han J.Xu C.wang Y.Yan W.C.Jing W.Q.Su D.J.Zhou t.wang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy University of Chinese Academy of SciencesBeijing 100049China

Pulsar polarization profiles form a very basic database for understanding the emission processes in a pulsar *** careful polarization calibration of the 19-beam L-band receiver and verification of beamoffset observation results,we obtain polarization profiles of 682 pulsars from observations by the Five-hundredmeter Aperture Spherical radio telescope(FASt)duringthe Galactic Plane Pulsar Snapshot survey and other normal FASt *** them,polarization profiles of about 460 pulsars are observed for the first *** profiles exhibit diverse *** pulsars have a polarization position angle curve with a good S-shaped swing,some with orthogonal modes;some have components with highly linearly polarized components or strong circularly polarized components;some have a very wide profile,coming from an aligned rotator,and some have an interpulse from a perpendicular rotator;some wide profiles are caused by interstellar *** derive geometric parameters for 190 pulsars from the S-shaped position angle curves or with orthogonal *** find that the linear and circular polarization or the widths of pulse profiles have various frequency *** with a large fraction of linear polarization are more likely to have a large Edot.

关键词： polarization (stars:)pulsars:general astronomical databases:miscellaneous

Clinical longitudinal evaluation of COVID-19 patients and prediction of organ-specific recovery using artificial intelligence

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Precision Clinical Medicine 2021年第1期4卷 62-69页

作者： Winston t.wang Charlotte L.Zhang Kang Wei Ye Sang Jun Shen Guangyu wang Alexander X.Lozano Department of Materials Science&Engineering Stanford UniversityStanfordCA 94305USA Mayo Clinic Alix school of Medicine ScottsdaleAZ 85259USA Guangzhou Women and Children’s Medical Center Guangzhou Medical UniversityGuangzhou 510623China the First College of Clinical Medical Science China Three Gorges UniversityYichang 443000China Department of Radiology Sun Yat-Sen Memorial HospitalSun Yat-Sen UniversityGuangzhou 510120China School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

Within COVID-19 there is an urgent unmet need to predict at the time of hospital admission which COVID-19 patients will recover from the disease,and how fast they recover to deliver personalized treatments and to properly allocate hospital resources so that healthcare systems do not become *** this end,we have combined clinically salient Ct imaging data synergistically with laboratory testing data in an integrative machine learning model to predict organ-specific recovery of patients from *** trained and validated our model in 285 patients on each separate major organ system impacted by COVID-19 including the renal,pulmonary,immune,cardiac,and hepatic *** greatly enhance the speed and utility of our model,we applied an artificial intelligence method to segment and classify regions on Ct imaging,from which interpretable data could be directly fed into the predictive machine learning model for overall *** all organ systems we achieved validation set area under the receiver operator characteristic curve(AUC)values for organ-specific recovery ranging from 0.80 to 0.89,and significant overall recovery prediction in Kaplan-Meier *** demonstrates that the synergistic use of an artificial intelligence(AI)framework applied to Ct lung imaging and a machine learning model that integrates laboratory test data with imaging data can accurately predict the overall recovery of COVID-19 patients from baseline characteristics.

关键词： artificial intelligence medical image COVID-19 longitudinal evaluation