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Hardening and toughening effects of intermediate nanosized structures in a confined amorphous alloy film

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Journal of Materials Science & Technology 2022年第23期118卷 44-53页

作者： Z.Q.Chen M.C.Li X.Tong y.zhao J.y.Xie S.W.Guo P.Huang F.Wang H.B.Ke B.A.Sun W.H.Wang Songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China Xinjiang Key Laboratory of Solid State Physics and Devices and School of Physical Science and Technology Xinjiang UniversityXinjiangUrumqi 830046China Key Laboratory of LCR Materials and Devices of yunnan Province School of Materials and EnergyYunnan UniversityKunming 650091China State-Key Laboratory for Mechanical Behavior of Material Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong UniversityXi’an 710049China National Demonstration Center for Experimental Mechanics Education Xi’an Jiaotong UniversityXi’an 710049China

The plastic deformation of amorphous alloys is well known to be localized into shear bands(SBs),which are believed to stem from the atomic-scale flow defects,i.e.,shear transformation zones(STZs).yet,the bridge between the mesoscopic SBs and the atomic-scale STZs remains poorly *** this work,through thermally activating pronouncedβrelaxations in the well-designed crystalline-layer confined amorphous(CLCA)Ni W alloy films,we experimentally captured and observed an intermediate nanosized structure termed as“nano shear bands”(NSBs)with a typical size of 1–2 nm in thickness and5–10 nm in *** influences of such NSB structures on the macroscale deformation behavior were systematically *** was found that NSBs lead to both hardening and toughening effects for the CLCA films,as they promote multiple and controlled shear banding deformation,which results in enhanced *** intermediate NSB structure could connect the microstructural characteristics and macroscopic plasticity in amorphous alloys and may provide new insights for understanding the microscopic deformation mechanism of amorphous alloys as well as tuning/designing their properties.

关键词： Amorphous alloys Nano shear band Hardening Toughening Crystallization

Transition from backward to sideward stimulated Raman scattering with broadband lasers in plasmas

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Matter and Radiation at Extremes 2023年第6期8卷 63-73页

作者： X.F.Li S.M.Weng P.Gibbon H.H.Ma S.H.yew Z.Liu y.zhao M.Chen Z.M.Sheng J.Zhang Key Laboratory for Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China Institute for Advanced Simulation Jülich Supercomputing CentreForschungszentrum Jülich52425 JülichGermany Centre for Mathematical Plasma Astrophysics Katholieke Universiteit Leuven3000 LeuvenBelgium Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Science Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China

Broadband lasers have been proposed as future drivers of inertial confined fusion(ICF)to enhance the laser-target coupling efficiency via the mitigation of various parametric *** physical mechanisms involved have been explored recently,but are not yet fully ***,stimulated Raman scattering(SRS)as one of the key parametric instabilities is investigated theoretically and numerically for a broadband laser propagating in homogeneous plasma in multidimensional *** linear SRS growth rate is derived as a function of scattering angles for two monochromatic laser beams with a fixed frequency differenceδω.Ifδω/ω_(0)∼1%,withω0 the laser frequency,these two laser beams may be decoupled in stimulating backward SRS while remaining coupled for sideward SRS at the laser intensities typical for ***,side-scattering may dominate over backward SRS for two-color laser *** finding of SRS transition from backward to sideward SRS is then generalized for a broadband laser with a few-percent ***-in-cell simulations demonstrate that with increasing laser bandwidth,the sideward SRS gradually becomes dominant over the backward *** sideward SRS is very efficient in producing harmful hot electrons,attention needs to be paid on this effect if ultra-broadband lasers are considered as next-generation ICF drivers.

关键词： scattering backward Transition

The Role of TNF Related Apoptosis-Inducing Ligand in Neurodegenerative Diseases

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Cellular & Molecular Immunology 2005年第2期2卷 113-122页

作者： y.Huang N.Erdmann H.Peng y.zhao ThelaboratoryofNeurotoxicologyattheCenterforNeurovirology＆NeurodegenerativeDisorders ／／Dept.Pharmacology Dept.ofSurgery UniversityofNebraskaMedicalCenterOmahaNE68198-5880USA／／InstituteofAnimalResearchChineseAcademyofScienceChina

A hallmark of all forms of neurodegenerative diseases is impairment of neuronal functions,and in many cases neuronal cell *** the etiology of neurodegenerative diseases may be distinct,different diseases display a similar pathogenesis,for example abnormal immunity within the central nervous system(CNS),activation of macrophage/microglia and the involvement of proinflammatory *** studies show that neurons in a neurodegenerative state undergo a highly regulated programmed cell death,also called ***-related apoptosis-inducing ligand(TRAIL),a member of the TNF family,has been shown to be involved in apoptosis during many *** one member of a death ligand family,TRAIL was originally thought to target only tumor cells and was not present in ***,recent data showed that TRAIL was unregulated in HIV-1-infected and immune-activated macrophages,a major disease inducing cell during HIV-1-assoeiated dementia(HAD).TRAIL is also induced on neuron by β-amyloid protein,an important pathogen for Alzheimer's *** this review,we summarize the possible common aspects that TRAIL involved those neurodegenerative diseases,TRAIL induced apoptosis signaling in the CNS cells,and specific role of TRAIL in individual *** & Molecular Immunology.2005;2(2):113-122.

关键词： Alzheimer's disease HⅣ-1 associated dementia multiple sclerosis apoptosis TRAIL macrophage

In-situ measurement of the surface temperature during holographic recording

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Chinese Optics Letters 2008年第1期6卷 25-28页

作者： A.Draude R.Meinhardt H.Franke y.zhao R.A.Lessard Department of Physics/Applied Physics University of Duisburg-Essen Département de chimie Universitéde SherbrookeSherbrookeQuébec COPL Département de physiquegénie physique et optiqueUniversité LavalQuébec

Photo-induced processes in organic materials mostly occur on molecular levels. Excited molecules may split to form radicals, starting a polymerization process with diffusing monomers. The azo-dyes perform an optically induced cis-trans isomerization. During pattern formation like a holographic grating, the local temperature increase, especially in thin films, is up to date a subject of estimation from absorption and dissipation data. However, the exact knowledge of the surface temperature would help a lot in understanding the resulting refractive index and thickness patterns during holographic exposure. In this paper, in-situ pyrometer measurements are presented. As examples, different photosensitive materials, varying from a photopolymer to polycrystalline azo dyes, are used in order to outline the magnitude of this effect and demonstrate the feasibility of this technique.

关键词： Holographic gratings Holographic recording Photosensitive materials Refractive index Surface measurements Thin films

Hesperomyces virescens(Fungi, Ascomycota, Laboulbeniales)attacking Harmonia axyridis(Coleoptera, Coccinellidae)in its native range

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Chinese Science Bulletin 2014年第5期59卷 528-532页

作者： Haelewaters Danny Richard F.Comont Serena y.zhao Donald H.Pfister Department of Organismic and Evolutionary Biology Harvard University NERC Centre for Ecology & Hydrology Maclean Building Kraus Natural Science Building University of Michigan

This study intended to find data on obligate ectoparasitic Laboulbeniales(Fungi,Ascomycota)on Chinese Harmonia axyridis(Coleoptera,Coccinellidae).After having screened over four thousand dried specimens of *** and close relatives,we present the first(historical)record of Chinese *** infected with Hesperomyces *** suggest that *** is a historically globally distributed species and hypothesize that(native)infection was lost when *** was introduced in North America.

关键词：异色瓢虫瓢虫科子囊菌鞘翅目真菌夜蛾攻击干标本

An Efficient Parallel/Unstructured-Multigrid Implicit Method for Simulating 3D Fluid-Structure Interaction

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Communications in Computational Physics 2008年第7期4卷 350-377页

作者： X.Lv y.zhao X.y.Huang G.H.Xia X.H.Su School of Mechanical and Aerospace Engineering College of EngineeringNanyang Technological UniversitySingapore 639798.

A finite volume(FV)method for simulating 3D Fluid-Structure Interaction(FSI)is presented in this *** fluid flow is simulated using a parallel unstructured multigrid preconditioned implicit compressible solver,whist a 3D matrix-free implicit unstructured multigrid finite volume solver is employed for the structural *** two modules are then coupled using a so-called immersed membrane method(IMM).Large-Eddy Simulation(LES)is employed to predict *** from several moving boundary and FSI problems are presented to validate proposed methods and demonstrate their efficiency。

关键词： Finite volume method moving boundary fluid-structure interaction unstructured multigrid computational structural mechanics immersed membrane method large-Eddy simulation.

An explicit solution to a three-dimensional wedge problem considering two edges effect

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Friction 2020年第2期8卷 370-383页

作者： L.GUO Z.M.ZHANG W.WANG y.zhao P.L.WONG School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China Department of Mechanical Engineering City University of Hong KongHong Kong SARChina

The paper presents an explicit matrix algorithm to solve the problem of an elastic wedge with three loaded *** algorithm makes use of a recently published concept of transformation matrix,by which the original surface loads are converted to equivalent loads in *** three loaded edges are considered *** developed algorithm is used to study the effects of two free edges of a steel block and tapered rollers with different contact *** two load-free edges can substantially increase deformation if the two edges are close in *** results of the tapered roller simulation show that deformation is considerably sensitive to the contact angle of the tapered *** largest deformation appears at the big end of the ***,empirical formulae for correction factors for the calculation of block or quarter-space deformation based on half-space solutions are summarized.

关键词： contact mechanics two edge surfaces finite line contact tapered roller contact

DEVELOPMENT AND APPLICATION OF ADAPTIVE MESH TECHNIQUE IN THREE DIMENSIONAL NUMERICAL SIMULATION OF WELDING PROCESS

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Acta Metallurgica Sinica(English Letters) 2000年第1期13卷 33-39页

作者： Q. y.Shi A. L. Lu H. y.zhao A.P. Wu (Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China)

The adaptive mesh mesh technique is developed and applied in three dimensional numerical simulation of welding process on the base of the commercial software. Special user subroutine is worked out to accom- plish this *** technique can make the dense mesh moving simultaneously with the heat source while the other area of the structure with much coarser mesh, greatly reducing the number of nodes and elements in the *** field,displacement and stress distributions during welding pro- cess me analyzed by FEM method with adaptive mesh and the analysis is also conducted with normal FEM method. The temperature field,displacement and stress distributions obtained with both methods are shown in contrast. The results show that the temperature fields and the displacement distributions of simulation on adaptive mesh correspond wery well with that of without adaptive mesh. Though the stress distributions have some difference,but the trends of the stress distribution are *** com- parison of the computing time of the two meshes indicates that the adaptive that the adaptive mesh can greatly reduce the calculation time when used for welding process.

关键词： adaptive mesh numerical simulation,temperature distribution,welding stress,welding displacement

MRI检测直肠癌病人壁外血管侵犯(mr EMVI)对新辅助治疗的预后价值：一项荟萃分析

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国际医学放射学杂志 2022年第1期 119-120页

作者： S.L.Chen N.Li y.Tang J.M.Shi y.zhao H.y.Ma 亓卿燕

摘要目的本荟萃分析旨在评估接受新辅助治疗的直肠癌病人中MRI检测的壁外血管侵犯（mr EMVI）和新辅助治疗后mr EMVI(ymr EMVI)的预后。方法对2020年6月前的

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