检索结果-南通市图书馆

Grain refinement of Mg-alloys by native MgO particles: An overview

Journal of Magnesium and Alloys 2022年第11期10卷 2919-2945页

作者： Z.Fan F.Gao Y.wang s.h.wang J.B.Patel Brunel Centre for Advanced solidification Technology(BCAsT) Brunel University LondonUxbridgeUB83PHUK

A fine and equiaxed solidification process delivers multidimensional benefits to Mg-alloys, such as improved castability, reduced casting defects, enhanced mechanical properties, increased corrosion resistance and potential for increased recycled contents. Despite extensive research on grain refinement of Mg-alloys in the last few decades, currently, there is no effective grain refiner available for refining Mg-Al alloys, and our current understanding of grain refining mechanisms is not adequate to facilitate the development of effective grain *** the EPsRC(UK) Li ME hub’s research program, substantial advances have been made in understanding the early stages of solidification covering prenucleation, heterogeneous nucleation, grain initiation and grain refinement. In this paper, we provide a comprehensive overview of grain refinement of Mg-alloys by native MgO particles. We show that native MgO particles can be made available for effective grain refinement of Mg-alloys by intensive melt shearing regardless of the alloy compositions. More importantly, we demonstrate that(1) the addition of more potent exogenous particles will not be more effective than native MgO;and(2) MgO particles are difficult to be made more impotent for grain refinement through promoting explosive grain initiation. We suggest that the most effective approach to grain refinement of Mg-alloys is to make more native MgO particles available for grain refinement through dispersion, such as by intensive melt shearing.

关键词： Mg-alloys Grain refinement Magnesia(MgO) Nucleation Grain initiation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Novel insight into dry sliding behavior of Cu-Pb-sn in-situ composite with secondary phase in different morphology

引用

Journal of Materials science & Technology 2020年第5期40卷 158-167页

作者： B.W.Dong s.h.wang Z.Z.Dong J.C.Jie T.M.wang T.J.Li school of Material science and Engineering Dalian University of TechnologyDalian 116024China

The Cu-24 Pb-x sn(wt%)(x=0,2,4,6)alloys with Pb-rich second-phase particles(sPPs)in different shapes show obviously differently mechanical and self-lubricating *** influence of the sPPs’shape difference on the alloys’mechanical and self-lubricating properties was ***-24 Pb alloy with continuously netty sPPs shows much more intensive stick-slip phenomenon during dry sliding than the other three alloys with independently rodlike *** is mainly due to insufficient lubrication resulted by the netty sPPs’splitting *** the sPPs transforming from netty to rodlike shape under the addition of sn,the stick-slip phenomenon was notably weakened,which was proven to be related to the higher self-lubricating property of alloys with rodlike ***,the simultaneous increase of ductility and tensile strength was observed in the Cu-24 Pb-x sn alloys with increasing sn content,which is because the netty sPPs’splitting behavior will be weakened with them replaced by the rodlike sPPs.

关键词： second-phase particles Netty shape Rodlike shape stick-slip Mechanical property self-lubricating property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The symplectic schemes On Regular Lattice

The Symplectic Schemes On Regular Lattice

引用

CCAsT“基因算法及其在物理，生命科学和工程中的应用”研讨会

作者： h.Y.Guo s.h.wang G.M.Wei K.Wu CCsAT-WL P.O.Box 8730 Beijing100080 China. Inst.of Applied Physics and Computational Mathematics P.O.Box 8009 Beijing 100088 China Inst.of Applied Physics and Computational Mathematics P.O.Box 8009 Beijing 100088 China Dappart.of Phys. Capital Normal University Beijing100037 China CCsAT-WL P.O.Box 8730 Beijing 100080 China.Inst.of Theoretical Phys. Acad sinica P.O.Box 2735 Beijng 100080 China~2.Depart.of Math. Ibaraki University Mito 310-8512 Japan~3.

1 IntroductionIn this talk,we briefly introduce our recent work[1] on a simple phase spacediscrete version of the symplectic algorithm[2],[3].It is well known that thesymplectic algorithm is very powerful and successful for hamiltonian systemsin comparison with other various non-symplectic computational schemes due tothe symplectic schemes are structure preserving in certain geometrical *** is well known however in the symplectic algorithm the symplectic struc-tures of phase-spaces of the problems being preserved are always taken as theoriginal continuous *** other wards,the ordinary symplectic schemescomplitely ignore the tiny-discretization properties of the phase spaces due to

关键词： The symplectic schemes On Regular Lattice hamiltonian

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

EXPREssION AND IDENTIFICATION OF ThE Ts87 GENE OF TRIChINELLA sPIRALIs IN PIChIA PAsTORIs

EXPRESSION AND IDENTIFICATION OF THE TS87 GENE OF TRICHINELL...

引用

第十九届国际动物学大会

作者： s.h.wang X.P.Zhu Y.Gu Y.P.Yang J.Yang Department of Parasitology School of Basic Medicine Capital University of Medicine Science Beijing 100054 China Department of Parasitology School of Basic Medicine Capital University of Medicine Science Beijing 100054 China Department of Parasitology School of Basic Medicine Capital University of Medicine Science Beijing 100054 China Department of Parasitology School of Basic Medicine Capital University of Medicine Science Beijing 100054 China Department of Parasitology School of Basic Medicine Capital University of Medicine Science Beijing 100054 China

＜正＞We chose Pichia pastoris expression system to express the Ts87 gene of Trichinella spiralis in order to obtain native and active protein. The Ts87 was amplified by PCR and recombined with the P. pastoris expression vector PPICZαA according to the manufacture’s instructions for a Pichia expression Kit ( In-

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Numerical manifold modeling of sliding instability of rock slope

Numerical manifold modeling of sliding instability of rock s...

引用

The 2nd IsRM International Young scholars’symposium on Rock Mechanics

作者： XJ.Mu,s.h.wang,M.D.Guo & Z.P.Feng state Key Laboratory for Geomechanics & Deep Underground Engineering,China University of Mining and Technology,Xuzhou,China s.h.wang school of Resource and Civil Engineering,Northeastern University,shenyang,China

The commonly used numerical method in geotechnical engineering like finite element method, distinct element method and discontinuous deformation analysis have different *** method has its own advantages and disadvantages with proper scope of *** Manifold Method(NMM) was originally developed by *** on the bases of Block Theory and Discontinuous Deformation Analysis (DDA) in the early ***'s a more general numerical method which can solve the problem of continuity and discontinuity,dynamic and static,large displacement and small *** paper introduces NMM briefly and model the spatial entity including three-dimensional finite random or fixed discontinuities using GeosMA-3D which is an independent R&D *** addition,we simulate the sliding instability of a certain section by NMM.

关键词： Numerical manifold modeling of sliding instability of rock slope

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The autophagy protein Atg9 functions in glia and contributes to parkinsonian symptoms in a Drosophila model of Parkinson’s disease

引用

Neural Regeneration Research 2024年第5期19卷 1150-1155页

作者： shuanglong Yi Linfang wang Margaret s.ho shiping Zhang school of Life science and Technology ShanghaiTech UniversityShanghaiChina College of Life sciences University of Chinese Academy of SciencesBeijingChina

Parkinson’s disease is a progressive neurodegenerative disease characterized by motor deficits,dopaminergic neuron loss,and brain accumulation ofα-synuclein aggregates called Lewy *** in protein degradation pathways,such as autophagy,has been demonstrated in neurons as a critical mechanism for eliminating protein aggregates in Parkinson’s ***,it is less well understood how protein aggregates are eliminated in glia,the other cell type in the *** the present study,we show that autophagy-related gene 9(Atg9),the only transmembrane protein in the autophagy machinery,is highly expressed in Drosophila glia from adult *** from immunostaining and live cell imaging analysis reveal that a portion of Atg9 localizes to the trans-Golgi network,autophagosomes,and lysosomes in ***9 is persistently in contact with these *** glial atg9 reduces the number of omegasomes and autophagosomes,and impairs autophagic substrate *** suggests that glial Atg9 participates in the early steps of autophagy,and hence the control of autophagic ***,loss of glial atg9 induces parkinsonian symptoms in Drosophila including progressive loss of dopaminergic neurons,locomotion deficits,and glial *** findings identify a functional role of Atg9 in glial autophagy and establish a potential link between glial autophagy and Parkinson’s *** results may provide new insights on the underlying mechanism of Parkinson’s disease.

关键词： Atg9 autophagy glia Parkinson’s disease

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cognition on oxidation behavior of Ni-based superalloy Gh4742 when exposed to water vapor

引用

Journal of Materials science & Technology 2024年第7期174卷 15-22页

作者： h.Xu s.F.Yang E.h.wang C.Y.Guo Y.s.Liu X.M.hou Y.L.Zhang state Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The oxidation behavior of Ni-based superalloy Gh4742 exposed to water vapor was investigated at 900-1100℃for 50 h in Ar+20%h_(2)O,with Ar+20%O_(2)included for *** presence of h_(2)O is adverse to formation of continuous Cr_(2)O_(3)oxide layer but contributes to generation of big *** on this,Ni^(2+)and Co^(2+)are more easily to diffuse towards the outermost oxide layer(OOL),forming non-protective Ni-and Co-rich oxides with high *** leads to a higher weight gain in Ar+20%h_(2)O than that in Ar+20%O_(2).At elevated temperatures,the spallation of oxide scale occurs while the consumption of Cr is reduced in Ar+20%h_(2)O,and the contents of Ni-and Co-rich oxides at this moment are reduced in the *** oxidation mechanism was also discussed.

关键词： Gh4742 superalloy h_(2)O Diffusion Oxidation Mechanism

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

search for production of dark fermion candidates in association with heavy neutral gauge boson decaying to dimuon in proton-proton collisions at√s=8 TeV using CMs open data

引用

Chinese Physics C 2024年第4期48卷 6-13页

作者： Y.Mahmoud h.Abdallah M.T.hussein s.Elgammal Centre for theoretical physics The British University in EgyptEgypt Physics Department Faculty of ScienceCairo UniversityEgypt

In this study,we conducted a search for dark matter using a part of the data recorded by the CMs experiment during run-I of the LhC in 2012 with a center of mass energy of 8 TeV and an integrated luminosity of 11.6 fb−*** data were gathered from the CMs open *** matter,in the framework of the simplified model(mono-Z′),can be produced from proton-proton collisions in association with a new hypothetical gauge boson,Z′.Thus,the search was conducted in the dimuon plus large missing transverse momentum *** benchmark scenario of mono-Z′,which is known as light vector,was used for interpreting the CMs open *** evidence of dark matter was observed,and exclusion limits were set on the masses of dark matter and Z′at 95%confidence level.