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Implementation of a Pediatric Emergency Triage System in Xiamen, China

Chinese Medical Journal 2016年第20期129卷 2416-2421页

作者： Gang-Xi Lin Yin-Ling Yang Denise kudirka Colleen Church collin k k yong Fiona Reilly Qi-Yi Zeng Department of Pediatrics Southern Medical UniversityGuangzhouGuangdong 510515China Department of Emergency Medicine First Affiliated Hospital of Xiamen UniversityXiamenFujian 361003China Department of Emergency Medicine First Affiliated Hospital of Xiamen University Xiamen Fujian 361003 China Department of Emergency Medicine Montreal Children's HospitalTupper V5L 2N1Canada Department of Emergency Medicine British-Columbia Children's HospitalVancouverBC V5L 2N1Canada Department of Emergency Medicine Mater Children's HospitalPaddingtonQueensland 4101Australia

Background：Pediatric emergency rooms （PERs） in Chinese hospitals are perpetually full of sick and injured children because of the lack of sufficiently developed community hospitals and low access to family *** aim of this study was to evaluate the clinical value of a new five-level Chinese pediatric emergency triage system （CPETS）,modeled after the Canadian Triage System and Acuity ***：In this study,we compared CPETS outcomes in our PER relative to those of the prior two-level *** who visited our PER before （January 2013-June 2013） and after （January 2014-June 2014） the CPETS was implemented served as the control and experimental group,*** flow,triage rates,triage accuracy,wait times （overall and for severe patients）,and patient/family satisfaction were compared between the two ***：Relative to the performance of the former system experienced by the control group,the CPETS experienced by the experimental group was associated with a reduced patient flow through the PER （Cox-Stuart test,t =0,P 〈 0.05）,a higher triage rate （93.40% vs.90.75%;χ^2 =801.546,P 〈 0.001）,better triage accuracy （96.32% vs.85.09%;χ^2 =710.904,P 〈 0.001）,shorter overall wait times （37.30 ± 13.80 min vs.41.60 ± 15.40 min;t =11.27,P 〈 0.001）,markedly shorter wait times for severe patients （2.07 [0.65,4.11] min vs.3.23 [1.90,4.36] min;z =-2.057,P =0.040）,and higher family satisfaction rates （94.23% vs.92.21%;x2 =321.528,P 〈 0.001）.Conclusions：Implementing the CPETS improved nurses＇ abilities to triage severe patients and,thus,to deliver the urgent treatments more *** system shunted nonurgent patients to outpatient care effectively,resulting in improved efficiency of PER health-care delivery.

关键词： Clinical Application Emergency Care Patient Satisfaction Wait Time

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Ultrastrong and ductile BCC high-entropy alloys with low-density via dislocation regulation and nanoprecipitates

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Journal of Materials Science & Technology 2022年第15期110卷 109-116页

作者： Xuehui Yan Peter k.Liaw yong Zhang Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996United States of America

The high strength is a typical advantage of body-centered-cubic high-entropy alloys(BCC–HEAs).However,brittleness and weak strain-hardening ability are still their Achilles'***,extraordinary strength together with good tensile ductility are achieved in(Zr_(0.5)Ti_(0.35)Nb_(0.15))_(100-x)Al_(x) alloys(at.%,x=10 and 20)at room *** low densities of less than 6 g/cm^(3)are exhibited in these *** nanoprecipitates and diversifying dislocation motions are the keys to achieving such salient *** is worth noting that the tensile strength of 1.8 GPa in(Zr_(0.5)Ti_(0.35)Nb_(0.15))_(80)Al_(20)alloy is a record-high value known in reported BCC–HEAs,as well as a tensile strain over 8%.Furthermore,the maximum strain of~25%in(Zr_(0.5)Ti_(0.35)Nb_(0.15))_(90)Al_(10)alloy can challenge existing limit value,and is accompanied with a tensile strength of 1.2 *** current work does not only provide novel ultra-strong and tough structural materials with low density,but also sheds new light on designing BCC–HEAs with attractive performances and strain-hardening ability.

关键词： High-entropy alloys Mechanical properties Dislocation Nanoprecipitates Strain hardening

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Structure design and property of multiple-basis-element(MBE)alloys flexible films

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Nano Research 2022年第6期15卷 4837-4844页

作者： Hao Huang Peter k.Liaw yong Zhang Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming Qinghai UniversityXining 810016China State key Laboratory of Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996-2100USA Shunde Graduate School University of Science and Technology BeijingFoshan 528399China

A controlled wrinkled structure is a simple and effective approach to achieve unique properties and has been widely used in flexible *** this study,we reported a substrate prestrain method for fabricating wrinkle-structured Zr52Ti34Nb14 multiplebasis-element(MBE)alloy films as biocompatible *** in the film thickness and substrate prestraining enabled a precise control of the amplitude and wavelength of the wrinkled structures,ranging from micrometers to ***,owing to the flexibility of the wrinkled structures,the wrinkle-structure pattern could be adjusted by simply relaxing or further stretching of the substrate,leading to dynamically tunable transmittance and wetting *** result not only reveals Zr52Ti34Nb14 MBE alloy films as a potential flexible material,but also provides a new structural design approach for other MBE alloy systems.

关键词： multiple-basis-element alloy thin films microstructures optical transmission wetting behavior

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Multilinear Singular and Fractional Integrals

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Acta Mathematica Sinica,English Series 2006年第2期22卷 347-356页

作者： yong DING Shan Zhen LU kz YABUTA School of Matematical Sciences Beijing Normal Unioversity School of Science and Technology Kwansei Gakuin University

In this paper, we treat a class of non-standard commutators with higher order remainders in the Lipschitz spaces and give （L^v, L^q）, （H^p, L^q） boundedness and the boundedness in the Triebel- Lizorkin spaces. Our... 详细信息

关键词： commutators multilinear operators singular and fractional integrals Lp spaces Hardy

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A Brief Review of High Entropy Alloys and Serration Behavior and Flow Units

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Journal of Iron and Steel Research International 2016年第1期23卷 2-6页

作者： yong ZHANG Jun-wei QIAO Peter k.LIAW State key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Laboratory of Applied Physics and Mechanics of Advanced Materials College of Materials Science and EngineeringTaiyuan University of Technology Department of Materials Science and Engineering University of Tennessee

Multicomponent alloys with high entropy of mixing,e.g.,high entropy alloys（HEAs）and/or multiprincipal-element alloys（MEAs）,are attracting increasing attentions,because the materials with novel properties are being developed,based on the design strategy of the equiatomic ratio,multicomponent,and high entropy of mixing in their liquid or random solution ***,HEAs with the ultrahigh strength and fracture toughness,excellent magnetic properties,high fatigue,wear and corrosion resistance,great phase stability/high resistance to heat-softening behavior,sluggish diffusion effects,and potential superconductivity,etc.,were *** HEAs can even have very high irradiation resistance and may have some self-healing effects,and can potentially be used as the first wall and nuclear fuel cladding *** behaviors and flow units are powerful methods to understand the plastic deformation or fracture of *** methods have been successfully used to study the plasticity of amorphous alloys（also bulk metallic glasses,BMGs）.The flow units are proposed as：free volumes,shear transition zones（STZs）,tension-transition zones（TTZs）,liquid-like regions,soft regions or soft spots,*** flow units in the crystalline alloys are usually dislocations,which may interact with the solute atoms,interstitial types,or substitution ***,the flow units often change with the testing temperatures and loading strain rates,e.g.,at the low temperature and high strain rate,plastic deformation will be carried out by the flow unit of twinning,and at high temperatures,the grain boundary will be the weak area,and play as the flow *** serration shapes are related to the types of flow units,and the serration behavior can be analyzed using the power law and modified power law.

关键词： high entropy alloy bulk metallic glass serration behavior flow unit

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CFD-based analysis of urban haze-fog dispersion—A preliminary study

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Building Simulation 2021年第2期14卷 365-375页

作者： Yu Zhang yong Yu k.C.S.kwok Feng Yan School of Medicine Tsinghua UniversityBeijingChina School of Aerospace Engineering Beijing Institute of TechnologyBeijingChina Faculty of Engineering School of Civil EngineeringThe University of SydneySydneyNew South WalesAustralia First Hospital of Tsinghua University BeijingChina

This paper proposes a computational fluid dynamics(CFD)model,along with dimensionless quantitative assessment standard—air pollution residual time(APRT)for the evaluation of local haze-fog(HF)dispersion in a built environment.A low APRT value ensures good ventilation.A building group model that comprises high-rise business building,mid-rise office buildings,low-mid-rise residential buildings(at the center of the building group),a mid-rise recreational center,and a local road(open terrain),was scaled down(1:100)to simulate the HF dispersion *** orientation of the building group was numerically modified to generate a wind incidence normal to the high-rise building,mid-rise buildings,recreational center,and *** results showed that the orientation of the building group largely determines the *** most favorable orientation can reduce APRT by more than 50%.Our results strongly suggested that in order to reduce the consequential negative effect of air pollution,future urban designs should undergo a comprehensive ventilation assessment to ensure a low APRT value.

关键词： air pollution residual time urban environment high-rise building wind direction computational fluid dynamics

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Melnikov Method and Detection of Chaos for Non-smooth Systems

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Acta Mathematicae Applicatae Sinica 2013年第4期29卷 881-896页

作者： Lin-song SHI yong-kui ZOU Tassilo küpper Department of Mathematics Tsinghua University Departmentt of Mathematics Jilin University Mathematics Institute Univeristy of Cologne

We extend the Melnikov method to non-smooth dynamical systems to study the global behavior near a non-smooth homoclinic orbit under small time-periodic perturbations. The definition and an explicit expression for the extended Melnikov function are given and applied to determine the appearance of transversal homoclinic orbits and chaos. In addition to the standard integral part, the extended Melnikov function contains an extra term which reflects the change of the vector field at the discontinuity. An example is discussed to illustrate the results.

关键词： Chaos non-smooth dynamical system Melnikov method homoclinic orbit

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Formation mechanism of titanium and niobium carbides in hardfacing alloy

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Rare Metals 2017年第8期36卷 640-644页

作者： ke Yang kèYang Ye-Feng Bao yong-Feng Jiang College of Mechanical and Electrical Engineering Hohai UniversityChangzhou 213022China

The most effective carbide-forming elements titanium and niobium were added into hardfacing *** and composition of carbides in the hardfacing alloy were investigated by means of optical microscope（OM）,scanning electron microscope（SEM）,X-ray diffraction（XRD）and energy-dispersive spectrometer（EDS）.Hardness and impact toughness of the hardfacing alloy were *** thermodynamics and formation mechanism of carbides were also *** is found that the carbides consist of TiC and NbC which are able to form directly from welding pool during the welding *** formation mechanism of carbides involves nucleation of TiC followed by epitaxial precipitation of NbC on the surface of *** formation of titanium and niobium carbides can obviously refine the microstructure and deplete the carbon in the *** micros tructure transforms to well-distributed carbides and a tough martensite matrix,contributing to a good combination of high hardness and high toughness in the hardfacing alloy.

关键词： Titanium Niobium Hardfacing alloy Carbides Microstructure

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Mining of lattice distortion, strength, and intrinsic ductility of refractory high entropy alloys

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npj Computational Materials 2023年第1期9卷 1814-1825页

作者： Christopher Tandoc yong-Jie Hu Liang Qi Peter k.Liaw Department of Materials Science and Engineering Drexel UniversityPhiladelphiaPA 19104USA Department of Materials Science and Engineering University of MichiganAnn ArborMI 48109USA Department of Materials Science and Engineering University of TennesseeKnoxvilleTN 37996USA

Severe lattice distortion is a prominent feature of high-entropy alloys(HEAs)considered a reason for many of those alloys’***,accurate characterizations of lattice distortion are still scarce to only cover a tiny fraction of HEA’s giant composition space due to the expensive experimental or computational *** we present a physics-informed statistical model to efficiently produce high-throughput lattice distortion predictions for refractory non-dilute/high-entropy alloys(RHEAs)in a 10-element composition *** model offers improved accuracy over conventional methods for fast estimates of lattice distortion by making predictions based on physical properties of interatomic bonding rather than atomic size mismatch of pure *** modeling of lattice distortion also implements a predictive model for yield strengths of RHEAs validated by various sets of experimental *** our previous model on intrinsic ductility,a data mining design framework is demonstrated for efficient exploration of strong and ductile single-phase RHEAs.

关键词： alloys ductility strength

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Preternatural Hexagonal High-Entropy Alloys: A Review

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Acta Metallurgica Sinica(English Letters) 2020年第8期33卷 1033-1045页

作者： Rui-Xuan Li Jun-Wei Qiao Peter k. Liaw yong Zhang Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology Beijing30 Xueyuan RoadBeijing 100083China Research Center for High-Entropy Alloys College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996USA

Recently,various topics on high-entropy alloys have been reported and great amounts of excellent properties have been investigated,including high strength,great corrosion resistance,great thermal stability,good fatigue and fracture properties,*** all these research activities,high-entropy alloys tend to form face-centered-cubic(FCC)or body-centeredcubic(BCC)solid solutions due to their high-entropy stabilization effect,while the hexagonal structures are rarely *** to now,the reported hexagonal high-entropy alloys are mainly composed of rare-earth elements and transitional *** phase transformation and magnetic properties have also aroused wide *** study summarizes the above results and provides the forecast to the future.

关键词： High-entropy alloys Hexagonal close-packed structure Phase formation rules Rare-earth elements Multiple-based-element(MBE)alloys

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