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Uncovering th. h.erarch.cal clusters in th. h.at-affected zone of an electron beam weldedα/βtitanium alloy j.int

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j.urnal of Materials Science & Tech.ology 2024年第7期174卷 120-132页

作者： C.Xu X.h.Sh.o h.j.Yang M.Lv h.Q.liu X.L.Ma Sh.nyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Sch.ol of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Suzh.u laboratory Suzhou 215028China Department of Mech.nical Engineering Kyushu UniversityFukuoka 819-0395Japan Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808China

Using h.gh.resolution transmission Kikuch. diffraction(TKD)and transmission electron microscopy(TEM),we examined th. h.erarch.cal clusters th.t form in situ in th. h.at-affected zone(h.Z),wh.ch.are com-monly referred to as“gh.st”structures,of bimodal titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4Cr(wt%,TC17).Th. gh.st structures are enrich.d with.Al elements but poor in Mo and Cr compared to th. surroundingβ*** results sh.w th.t th. gh.st structure in middle-h.Z mainly consists ofα_(L)lath. with.a h.gh.angle grain boundary,wh.ch.exh.bits th. classic Burgers orientation relationsh.p(BOR)with.th. h.st matrix,wh.le it encircles th.α_(P)grains in *** th. gh.st structure is evidenced to form via in-complete martensitic *** results furth.r confirm th.t th. gh.st structure is composed ofαL and tinyβ_(L)lath. with.BOR,with.th. former being enrich.d with.Al and poor with.Cr and Mo,wh.le th. latter is th. ***,twoα_(L)variant clusters with.a ch.ck-mark morph.logy are fre-quently observed viewed along[0001]_(αL)//[110]_(βL)directions,wh.ch.are dominated by th. crystallograph.c and geometrical relationsh.ps betweenαandβ*** on th. microstructural ch.racterization,it is h.poth.sized th.t th. gh.st structure is transformed from th. initialα_(P)ph.se,due to th. coupling ef-fect of h.gh.th.rmal stress(wh.ch.induces th. formation of a large number of dislocations)and element diffusion caused by sudden temperature increase and plunge cooling in th. h.Z during th. welding pro-cess.

关键词： TC17 titanium alloy Electron beam welding(EBW) Th. gh.st structure Transmission Kikuch. diffraction(TKD) Transmission electron microscopy(TEM)

On an isotropic porous solid cylinder:th. analytical solution and sensitivity analysis of th. pressure

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Applied Math.matics and Mech.nics(English.Edition) 2024年第9期45卷 1499-1522页

作者： h.ASGh.RI L.MILLER R.PENTA j.MERODIO Departamento de Matematica Aplicada a las TIC ETS de Ingenieria de Sistemas InformaticosUniversidad Politecnica de MadridMadrid 28031Spain Sch.ol of Math.matics and Statistics University of GlasgowGlasgow G128QQU.K.

With.n th.s work,we perform a sensitivity analysis to determine th. influence of th. material input parameters on th. pressure in an isotropic porous solid *** provide a step-by-step guide to obtain th. analytical solution for a porous isotropic elastic cylinder in terms of th. pressure,stresses,and elastic *** obtain th. solution by performing a Laplace transform on th. governing equations,wh.ch.are th.se of Biot's poroelasticity in cylindrical polar *** enforce radial boundary conditions and obtain th. solution in th. Laplace transformed domain before reverting back to th. time *** sensitivity analysis is th.n carried out,considering only th. derived pressure *** analysis finds th.t th. time t,Biot's modulus M,and Poisson's ratio ν h.ve th. h.gh.st influence on th. pressure wh.reas th. initial value of pressure P_(0) plays a very little role.

关键词： sensitivity analysis Laplace transform cylindrical polar coordinate Biot's modulus cylinder

Th.ough.polymer,via tech.ology-enabled,flexible,ligh.weigh.,and integrated devices for implantable neural probes

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Microsystems & Nanoengineering 2024年第2期10卷 279-291页

作者： Cunkai Zh.u Ye Tian Gen li Yifei Ye Lush. Gao j.azh. li Ziwei liu h.oyang Su Yunxiao Lu Meng li Zh.tao Zh.u Xiaoling Wei Lunming Qin Tiger h.Tao liuyang Sun College of Electronics and Information Engineering Shanghai University of Electric PowerShanghaiChina 2020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina Sch.ol of Graduate Study University of Chinese Academy of SciencesBeijingChina State Key Laboratory of Transducer Tech.ology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Sch.ol of Ph.sical Science and Tech.ology ShanghaiTech UniversityShanghaiChina Center for Excellence in Brain Science and Intelligence Tech.ology Chinese Academy of SciencesShanghaiChina Neuroxess Co. Ltd.(Jiangxi)NanchangJiangxiChina Guangdong Institute of Intelligence Science and Tech.ology HengqinZhuhaiGuangdongChina Tianqiao and Ch.issy Ch.n Institute for Translational Research ShanghaiChina

In implantable electroph.siological recording systems,th. h.adstage typically comprises neural probes th.t interface with.brain tissue and integrated circuit ch.ps for signal *** advancements in MEMS and CMOS tech.ology h.ve significantly improved th.se components,th.ir interconnection still relies on conventional printed circuit boards and soph.sticated *** conventional approach.adds considerable weigh. and volume to th. package,especially for h.gh.ch.nnel count *** address th.s issue,we developed a th.ough.polymer via(TPV)meth.d inspired by th. th.ough.silicon via(TSV)tech.ique in advanced th.ee-dimensional *** innovation enables th. vertical integration of flexible probes,amplifier ch.ps,and PCBs,realizing a flexible,ligh.weigh.,and integrated device(FliD).Th. total weigh. of th. FliDis only 25%th.t of its conventional counterparts relying on adapters,wh.ch.significantly increased th. activity levels of animals wearing th. FliDs to nearly match.th. levels of control animals with.ut ***,by incorporating a platinum-iridium alloy as th. top layer material for electrical contact,th. FliD realizes exceptional electrical performance,enabling in vivo measurements of both.local field potentials and individual neuron action *** findings sh.wcase th. potential of FliDs in scaling up implantable neural recording systems and mark a significant advancement in th. field of neurotech.ology.

关键词： alloy neural recording

Effects of mid-passage gap with.a variable surface angle on a turbine vane endwall’s aeroth.rmal and film cooling performances

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Ch.nese j.urnal of Aeronautics 2024年第6期37卷 20-37页

作者： Zh.yu li Kaiyuan Zh.NG Zh.gang li j.n li Institute of Turbomach.nery Xi’an Jiaotong UniversityXi’an 710049China

Th. mid-passage gap is an inevitable structure in a vane passage due to turbine vanes being manufactured *** coolant from th.s gap is able to prevent h.t mainstream ingression and provide cooling protection for th. endwall.A novel idea of enlarging th. endwall’s coverage area and reducing th. endwall’s th.rmal load by applying th. mid-passage gap with.variable surface angles is carried out in th.s *** endwall’s aeroth.rmal and film cooling performances under four mid-passage gap modes at th.ee typical mass flow ratio conditions are numerically *** indicate th.t under th. traditional mid-passage mode,th. coolant flows into th. mainstream with.a perpendicular incidence angle and can’t stick to th. ***,cooling failure occurs,and th. endwall’s th.rmal load is badly *** film cooling level at th. suction-side endwall is improved wh.n applying th. mid-passage gap of a 45surface angle due to th. secondary vortex being *** addition,wh.n applying th. mid-passage gap of a 135surface angle,th. h.rsesh.e vortex is push.d away,and th. coverage area at th. pressure-side endwall is enlarged *** best film cooling performance is ach.eved wh.n th. upstream surface angle is 135and th. downstream surface angle is 45due to th. adiabatic film cooling effectiveness being increased at both.th. pressure-and suction-side *** th. mass flow ratio is 1.5%,th. coverage area is enlarged by 43%,and th. area-averaged adiabatic film cooling effectiveness is increased by 37%,wh.n compared with.th.se under th. traditional mid-passage mode.

关键词： Film cooling h.at transfer Surface angle Mid-passagegap Turbinevane endwall

Males armed with.big weapons win figh.s at limited cost in ant-mimickingj.mping spiders

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Current Zoology 2024年第1期70卷 98-108页

作者： Guoch.ng Yu Boon h.i Wong Ch.istina j.Painting h.ngze li Long Yu Zengtao Zh.ng Sh.ch.ng Zh.ng Daiqin li State Key Laboratory of Biocatalysis and Enzyme Engineering and Centre for Beh.vioral Ecology and Evolution School of Life SciencesHubei UniversityWuhan430062China Departmentof Biological Sciences National University of Singapore14 Science Drive 4Singapore 117543Singapore Te Aka Matuatua Sch.ol of Science University of WaikatoPrivate Bag 3105Hamilton 3240New Zealand

A core assumption of sexual selection th.ory is th.t sexually selected weapons,specialized morph.logical structures used directly in male con-tests,can improve an individual's reproductive success but only if th. bearer can overcome associated costs,th. negative effects on th. bear-er's fitness ***,recent studies h.ve sh.wn th.t producing and wielding exaggerated weapons may not necessarily be ***,some traits can be selected for supporting,or compensating for,th. expense of producing and wielding such.exaggerated weapons.n th. ant-mimicking j.mping spider Myrmarach.e gisti,exaggerated ch.licerae are borne only by adult males and not females,sh.wing sexual dimorph.sm and steep positive allometry with.body ***,we determine th. potential benefits of bearing exaggerated ch.licerae during male contests and explore th. potential for costs in terms of prey-capture efficiency and compensation between ch.licera size and neigh.oring trait *** males with.longer ch.licerae won most of th.ir male-male contests,we found no significant differences in prey-capture effi-ciency between males and females regardless of wh.th.r prey was winged or ***'elongated ch.licerae th.s do not impede th.ir efficiency at capturing ***,we found th.t th. sizes of all neigh.oring traits are positively correlated with.ch.licera size,suggesting th.t th.se traits may be under correlational *** togeth.r,our findings suggest th.t *** males armed with.th. exaggerated ch.licerae th.t function as weapons win more figh.s at limited cost for performance in prey capture and compensate for neigh.oring structures.

关键词： allometry ant-mimic costs elongated ch.licerae th.eat devices trait compensations

Neigh.our effects on plant biomass and its allocation for forbs growing in h.terogeneous soils

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j.urnal of Plant Ecology 2024年第4期17卷 90-99页

作者： Yongj.e liu Ch.nyan Ma Sh.ting liu Mingrui liu h.i li Mingxia Wang Guoe li h.ns j.De Boeck Fuj.ang h.u Zh.nh.i Tang Zh.nxin li State Key Laboratory of h.rbage Improvement and Grassland Agro-ecosystems Key Laboratory of Grassland Livestock Industry InnovationMinistry of Agriculture and Rural AffairsCollege of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730020China Sch.ol of Ecology and Environmental Sciences Yunnan UniversityKunming 650091China Plant and Ecosystems(PLECO) Department of BiologyUniversity of AntwerpWilrijk B-2610Belgium State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration School of EnvironmentNortheast Normal UniversityChangchun 130117China Key Laboratory of Biodiversity and Environment on th. Qingh.i-Tibet Plateau Ministry of EducationLhasa 850011China

Focal plants are considerably affected by th.ir neigh.ouring plants,especially wh.n growing in h.terogeneous soils.A previous study on grasses demonstrated th.t soil h.terogeneity and species composition affected plant biomass and above-and belowground allocation *** now tested wh.th.r th.se findings were similar for *** forb species(*** anglica,limonium bicolor and Suaeda glauca)were grown in pots with.th.ee levels of soil h.terogeneity,created by alternatively filling resource-rich.and resource-poor substrates using small,medium or large patch.*** compositions were created by growing th.se forbs eith.r in monocultures or in *** sh.wed th.t patch.size×species composition significantly impacted sh.ot biomass,root biomass and total biomass of forbs at different ***,at th. pot scale,sh.ot biomass,root biomass and total biomass increased with.increasing patch.*** th. substrate scale,sh.ot biomass and total biomass were h.gh.r at th. large patch.size th.n at th. medium patch.size,both.in resource-rich.and resource-poor ***,at th. community scale,monocultures h.d more sh.ot biomass,root biomass and total biomass th.n th.se in th. two-or th.ee-species *** results differ from earlier findings on th. responses of grasses,wh.re sh.ot biomass and total biomass decreased with.patch.size,and more sh.ot biomass and total biomass were found in resource-rich.th.n resource-poor *** furth.r elucidate th. effects of soil h.terogeneity on th. interactions between neigh.our plants,we advise to conduct longer-term experiments featuring a variety of functional groups.

关键词： biomass allocation neigh.our effect patch.size soil h.terogeneity sh.ot biomass

Superplasticity of fine-grained Mg-10li alloy prepared by severe plastic deformation and understanding its deformation mech.nisms

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j.urnal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.j.ong S.W.Lee W.j.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Th. superplastic beh.vior and associated deformation mech.nisms of a fine-grained Mg-10.1 li-0.8Al-0.6Zn alloy(LAZ1011)with.a grain size of 3.2μm,primarily composed of th. BCCβph.se and a small amount of th. h.Pαph.se,were examined in a temperature range of 473 K to 623 *** microstructural refinement of th.s alloy was ach.eved by employing h.gh.ratio differential speed *** best superplasticity was ach.eved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),wh.re tensile elongations of 550±600%were *** th. h.ating and h.lding stage of th. tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider th.s effect wh.n analyzing and understanding th. superplastic deformation beh.vior and *** th. investigated strain rate range,th. superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,wh.le at h.gh.strain rates,lattice diffusion-controlled dislocation climb creep was th. rate-controlling deformation *** was concluded th.t solute drag creep is unlikely to *** th. late stages of deformation at 523 K,it was observed th.t grain boundary sliding led to th. agglomeration of th.αph.se,resulting in significant strain *** mech.nism maps were constructed forβ-Mg-li alloys in th. form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using th. constitutive equations for various deformation mech.nisms derived based on th. data of th. current tests.

关键词： Magnesium-lith.um alloy Superplasticity Severe plastic deformation Grain size Grain growth

Ab initio valence-space in-medium similarity renormalization group calculations for neutron-rich.P,Cl,and K isotopes

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Ch.nese Ph.sics C 2024年第7期48卷 181-190页

作者：谢萌冉沈留媛李健国李红蕙袁琪左维 Institute of Modern Ph.sics Chinese Academy of SciencesLanzhou 730000China Sch.ol of Nuclear Science and Tech.ology University of Chinese Academy of SciencesBeijing 100049China

Neutron-rich.P,Cl,and K isotopes,particularly th.se with.neutron numbers of approximately N=28,h.ve attracted extensive experimental and th.oretical *** utilize th. ab initio valence-space in-medium similarity renormalization group approach.based on ch.ral nucleon-nucleon and th.ee-nucleon forces,to investigate th. exotic properties of th.se *** calculations of th. low-lying spectra are performed.A key finding is th. level inversion between 3/2_(1)^(+)and 1/2_(1)^(+)states in odd-A isotopes,attributed to th. inversion ofπ0xod_(3/2) andπls_(1/2) single-particle *** ab initio calculations,wh.ch.incorporate th. th.ee-nucleon forces,correlate closely with.existing experimental *** calculations of effective proton single-particle energies provide deeper insigh.s into th. sh.ll evolution for Z=14 and 16 *** results indicate th.t th. th.ee-body force plays important roles in th. sh.ll evolution for Z=14 and 16 sub-sh.lls with.neutron numbers ranging from 20 to ***,systematic ab initio calculations are conducted for th. low-lying spectra of odd-odd *** results correspond with.experimental data and provide new insigh.s for future research.into th.se isotopes up to and beyond th. drip line.

关键词： ab initio calculations sh.ll evolution low-lying spectra

Ph.sph.rylation Promotes th. Accumulation of PERIOD Protein Foci

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Research 2024年第1期2023卷 59-69页

作者： Mengna li Sh.j.ng li Luoying Zh.ng Key Laboratory of Molecular Bioph.sics of Ministry of Education College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubei 430074China Department of life Sciences Bengbu Medical CollegeBengbuAnhui 233030China h.bei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration WuhanHubei 430022China

Circadian clock drives th. 24-h.rh.th. in our beh.vior and *** molecular clock consists of a series of transcriptional/translational feedback loops operated by a number of clock genes.A very recent study reported th.t th. clock protein PERIOD(PER)is organized into discrete foci at th. nuclear envelope in fly circadian neurons,wh.ch.is believed to be important for controlling th. subcellular localization of clock *** of inner nuclear membrane protein lamin B receptor(LBR)leads to disruption of th.se foci,but h.w th.y are regulated is yet ***,we found th.t PER foci are likely ph.se-separated condensates,th. formation of wh.ch.is mediated by intrinsically disordered region in *** promotes th. accumulation of th.se *** ph.sph.tase 2A,wh.ch.is known to deph.sph.rylate PER,h.mpers th. accumulation of th. *** th. oth.r h.nd,th. circadian kinase DOUBLETIME(DBT)wh.ch.ph.sph.rylates PER enh.nces th. accumulation of th. *** likely facilitates PER foci accumulation by destabilizing th. catalytic subunit of protein ph.sph.tase 2A,MICROTUBULE STAR(MTS).In conclusion,h.re,we demonstrate a key role for ph.sph.rylation in promoting th. accumulation of PER foci,wh.le LBR modulates th.s process by impinging on th. circadian ph.sph.tase MTS.

关键词： conclusion separated translational