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A quantitative microplasticity-based approach to rationalize the poor strengthening response of polycrystalline mg alloys

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Journal of magnesium and Alloys 2023年第5期11卷 1656-1671页

作者： X.Z.jin W.C.Xu D.B.Shan B.Guo B.jin m.T.Pérez-Prado National key Laboratory for Precision Hot Processing of metals&School of materials Science and Engineering Harbin Institute of TechnologyHarbin 150001PR China ImDEA materials Institute C/Eric Kandel2GetafeMadrid 28906Spain Advanced Composites Simulation Lab University of Southern CaliforniaLos AngelesCA 90089U.S.A m.C.Gill Composites Center University of Southern CaliforniaLos AngelesCA 90089U.S.A

This work aims to understand the inefficiency of nanoprecipitates to strengthen a weakly textured,polycrystalline mg-Gd-Y-Zr *** experimental micromechanical approach consisting on micropillar compression combined with analytical electron microscopy is put in place to analyze the effect of nanoprecipitation on soft and hard basal slip and twinning in individual grains with different *** study shows that,in grains that are favorably oriented for basal slip(“soft”basal slip),aging leads to extreme localization due to the ability of basal dislocations to shear the nanoparticles,resulting overall in the softening of basal ***,in grains in which the c-axis is almost perpendicular to the compression axis,prismatic slip dominates deformation in the solid solution state and nanoprecipitation favors twinning due to the concomitant lattice solute ***,in grains oriented with their c-axis making an angle of about 5-7°with respect to the compression axis,which deform mainly by“hard”basal slip,precipitation leads to the strengthening of basal systems in the absence of obvious *** work reveals that the poor hardening response of the polycrystalline alloy is related to the capability of basal dislocations to shear the nanoparticles,in the absence of Orowan looping events,and to the associated basal slip localization.

关键词： magnesium Precipitation Basal slip Particle shearing Slip localization

Global Solvability,Pattern Formation and Stability to a Chemotaxis-haptotaxis model with Porous medium Diffusion

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Acta mathematica Sinica,English Series 2023年第8期39卷 1597-1623页

作者： Chun Hua jin School of mathematical Sciences South China Normal UniversityGuangzhou 510631P.R.China

In this paper,we deal with the following chemotaxis-haptotaxis system modeling cancer invasion with nonlinear diffusion,ut=Δum−χ∇·(u∇v)−ξ∇·(u∇ω)+μu(1−u−ω),inΩ×R^(+),vt−Δv+v=u,inΩ×R+,ωt=−vω,inΩ×R+,whereΩ⊂R^(N)is a bounded *** first supplement the results of global existence and uniform boundedness of solutions for the case m=2N N+*** for any m>0 and any spatial dimension,we consider the stability of equilibrium,and find that the chemotaxis has a destabilizing effect,that is for the ODEs,or the diffusion-ODE system without chemotaxis,the solutions tend to a linearly stable uniform steady state(1,1,0).When the chemotactic coefficientχis large,the equilibrium(1,1,0)become *** we study the existence of nontrivial stationary solutions via bifurcation techniques withχbeing the bifurcation parameter,and obtain nonhomogeneous *** last,we also investigate the stability of these bifurcation solutions.

关键词： Chemotaxis-haptotaxis porous medium diffusion pattern formation stability

Investigation of protein-styrene oxide adducts as a molecular biomarker of human exposed to styrene

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Journal of Environmental Sciences 2001年第4期13卷 391-397页

作者： Liu, S.-F. Fang, Q.-m. jin, Z.-L. Rappaport, m.S. Res. Cntr. Eco-Environmental Sci. Chinese Academy of Sciences Beijing 100085 China

Hemoglobin-styrene oxide adducts in blood have been studied as a molecular biomarker of worker exposed to styrene. Determination of protein-styrene oxide adducts in different biological samples with modified Raney-Ni procedure is described in this paper. The following biological samples have been investigated: fresh rat blood reacted with styrene oxide in vitro: rat blood reacted with styrene or styrene oxide in vivo: vein blood from workers exposed to styrene in two factories. The data showed that there was a good linear dose-response relationship between reacting dose of styrene oxide or styrene and amount of protein-styrene oxide adducts in both in vitro and in vivo experiments. For human samples, a dose-response relationship between protein adducts and styrene exposure can be found in glass fiber factory, but not in piano manufacture plant.

关键词： Blood Drug dosage Glass fibers Hemoglobin manufacture Oxides Proteins Styrene

NUmERICAL ANALYSIS OF CRANk-NICOLSON SCHEmE FOR THE ALLEN-CAHN EQUATION

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Journal of Computational mathematics 2021年第5期39卷 655-665页

作者： Qianqian Chu Guanghui jin Jihong Shen Yuanfeng jin Department of mathematics Yanbian UniversityYanji 133002China Department of mathematics Science Harbin Engineering UniversityHarbin 150001China

We consider numerical methods to solve the Allen-Cahn equation using the second-order Crank-Nicolson scheme in time and the second-order central difference approach in *** existence of the finite difference solution is proved with the help of Browder fixed point *** difference scheme is showed to be unconditionally convergent in Loo norm by constructing an auxiliary Lipschitz continuous *** on this result,it is demonstrated that the difference scheme preserves the maximum principle without any restrictions on spatial step size and temporal step *** numerical experiments also verify the reliability of the method.

关键词： Allen-Cahn Equation Crank-Nicolson scheme maximum principle Convergence

SPLITTING EXTRAPOLATIONS FOR SOLVING BOUNDARY INTEGRAL EQUATIONS OF LINEAR ELASTICITY DIRICHLET PROBLEmS ON POLYGONS BY mECHANICAL QUADRATURE mETHODS

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Journal of Computational mathematics 2006年第1期24卷 9-18页

作者： jin Huang Tao Lu University of electronic & science technology of China Chengdu 610055 mathematical College Sichuan University Chengdu 610065 China

Taking hm as the mesh width of a curved edge Гm （m = 1, ..., d ） of polygons and using quadrature rules for weakly singular integrals, this paper presents mechanical quadrature methods for solving BIES of the first kind of plane elasticity Dirichlet problems on curved polygons, which possess high accuracy O（h0^3） and low computing complexities. Since multivariate asymptotic expansions of approximate errors with power hi^3 （i = 1, 2, ..., d） are shown, by means of the splitting extrapolations high precision approximations and a posteriori estimate are obtained.

关键词： Splitting extrapolation Linear elasticity Dirichlet problem Boundary integral equation of the first kind mechanical quadrature method

Burning mouth Syndrome: Patient Profiles, Clinical Symptoms, Affecting Associated Factors, and Treatment Responses

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International Journal of Otolaryngology and Head & Neck Surgery 2018年第4期7卷 237-248页

作者： Byung Woo Lim hae Dong k.m jin Soon Chang Ick Soo Choi Department of Otorhinolaryngology-Head and Neck Surgery Ilsan Paik Hospital Inje University College of Medicine Ilsanseo-gu Goyang-si Korea Department of Otorhinolaryngology-Head and Neck Surgery Seoul Paik Hospital Inje University College of Medicine Jung-gu Seoul Korea

Background: The clinical characteristics of burning mouth syndrome (BmS) are not fully understood. We investigated the profiles of BmS patients, characteristics associated with BmS, and the available treatment methods and their effects. methods: Seventy-four BmS patients without oral mucosal lesions were enrolled. Their medical history, medications taken, and symptom scores were investigated via questionnaires. Laboratory investigations of parameters potentially associated with BmS were performed. Regarding treatment, 0.01% dexamethasone gargle, amitriptyline, and clonazepam were administered individually or in combination, depending on the degree of symptom improvement. Symptoms were scored from 0 - 10 points;these scores were used to evaluate treatment efficacy and patient satisfaction. Results: mean age of the patients was 63.6 ± 14.2 years;mean symptom prevalence period was 15.5 ± 24.7 months. BmS was not significantly associated with a history of hypertension, diabetes, or any specific medications. Treatment reduced the symptoms of 85.1% subjects (63/74). Conclusions: Contrary to that in previous studies, we observed significant improvements in BmS patients following combination treatment with dexamethasone gargle, amitriptyline, and clonazepam.

关键词： Burning mouth Syndrome Dexamethasone Amitriptyline Clonazepam

NUmERICAL SImULATION OF TRANSVERSE DIFFUSION IN A mICROCHANNEL

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Journal of Hydrodynamics 2004年第6期16卷 651-657页

作者： WANGRui-jin LINJian-zhong Departmentofmechanics ZhejiangUniversityHangzhou310027China／／DepartmentofMechanicsZhejiangUniversityofScienceandTechnologyHangzhou310012China Departmentofmechanics ZhejiangUniversityHangzhou310027China

The diffusion-based micro flow of a T-sensor with three inlets in whichvarious species are injected was simulated numerically. The results show that the Reynolds number isan important factor of affecting the efficiency of diffusion. The smaller the channel width is, themore strongly the species diffuse. The velocity gradient across the channel width plays a key rolein the diffusion of species. The conclusions are helpful to the design of micro-fluidic devices andthe analysis of data collected from such devices.

关键词： T-sensor micro-channel diffusion numerical simulation

Phototropins and Their LOV Domains：Versatile Plant Blue-Light Receptors

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Journal of Integrative Plant Biology 2007年第1期49卷 4-10页

作者： Winslow R. Briggs Tong-Seung Tseng hae-Young Cho Trevor E. Swartz Stuart Sullivan Roberto A. Bogomolni Eirini kaiserli John m. Christie Department of Plant Biology Carnegie Institution of Washington Stanford CA 94305 USA Plant Science Group Division of Biochemistry and Molecular Biology Institute of Biomedical and Life Sciences University of Glasgow Glasgow G12 8QQ UK Department of Chemistry University of California Santa Cruz CA 95064 USA

The phototropins phot1 and phot2 are plant blue-light receptors that mediate phototropism, chloroplast movements, stomatal opening, leaf expansion, the rapid Inhibition of hypocotyl growth in etiolated seedlings, and possibly solar tracking by leaves in those species in which It occurs. The phototroplns are plasma membrane-associated hydrophilic proteins with two chromophore domains （designated LOV1 and LOV2 for their resemblance to domains In other signaling proteins that detect light, oxygen, or voltage） in their Nterminal half and a classic serine/threonlne kinase domain in their C-terminal half. Both chromophore domains bind flavin mononucleotide （FmN） and both undergo light-activated formation of a covalent bond between a nearby cystelne and the C（4a） carbon of the FmN to form the signaling state. LOV2-cystelnyl adduct formation leads to the release downstream of a tightly bound amphlpathlc α-helix, a step required for activation of the klnase function. This cysteinyl adduct then slowly decays over a matter of seconds or minutes to return the photoreceptor chromophore modules to their ground state. Functional LOV2 is required for light-activated phosphorylation and for various blue-light responses mediated by the phototroplns. The function of LOV1 is still unknown, although It may serve to modulate the signal generated by LOV2. The LOV domain Is an ancient chromophore module found In a wide range of otherwise unrelated proteins In fungi and prokaryotes, the latter Including cyanobacterla, eubacterla, and archaea. Further general reviews on the phototropins are those by Celaya and Liscum （2005） and Christie and Briggs （2005）.

关键词： blue-light receptor flavin-cysteinyl adduct LOV domain phototropin phototropism

Palaeoclimate background of the diverse Eocene floras of South China

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Science Bulletin 2017年第22期62卷 1501-1503页

作者： Jian-Hua jin Alexei B. Herman Robert A. Spicer Tatiana m. kodrul State key Laboratory of Biocontrol and Guangdong Provincial key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China Geological Institute Russian Academy of SciencesMoscow 119017Russia School of Environment Earth and Ecosystem SciencesThe Open UniversityMilton Keynes MK7 6AAUK

Hainan and Guangdong provinces,located in north tropical area and south subtropical area of China respectively,bear one of the highest levels of biodiversity in *** modern floras of Hainan and Guangdong are dominated by pantropical and tropical-subtropical taxa and many of their representative families appeared as early as in the Eocene[1].The Eocene,therefore,represents a crucial stage in the formation of the extant ***,previously the Eocene floras and vegetation were largely studied in mid-

关键词： Palaeoclimate background of the diverse Eocene floras of South China