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Bridging microst.uct.re and cryst.llography wit. t.e crack propagat.on behavior in t.-6Al-4V alloy fabricat.d via dual laser beam bilat.ral synchronous welding

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Journal of Mat.rials Science & t.chnology 2024年第7期174卷 1-14页

作者： t.ngyan yan Yuan Liu Jianfeng Wang Yong Zheng Xiaohong Zhan College of Mat.rials Science and t.chnology Nanjing University of Aeronautics and AstronauticsNanjing 211106China

t.e microst.uct.re evolut.on and crack propagat.on behavior were syst.mat.cally and t.oroughly inves-t.gat.d inα/βt.-6Al-4V alloy obt.ined under t.e inhomogeneous heat.ng effect.of a coupled dual laser beam via a combinat.on of post.ort.m elect.on backscat.ering diffract.on analyses and numerical *** effect.of microst.uct.ral at.ribut.s(grain size,grain boundary,dislocat.on)on t.e fract.re propert. and crack propagat.on behavior was invest.gat.d based on t.ermodynamic and cryst.llographic analyses,as well as t.e examinat.ons of dislocat.on densit. and t.e Burgers *** quant.fying t.e degree of variant.select.on using t.e degree of variant.select.on(DVS)equat.on,it.was found t.at.t.e higher t.e energy input.t.e weaker t.e variant.select.on,as t.e secondaryαphase suppresses furt.er dislocat.on-induced variant.select.on via aut.cat.lyt.c nucleat.on and *** proport.on of high an-gle grain boundaries(HAGBs)concent.at.d around 60°gradually increases wit. improving cooling rat.,mainly due t. t.e change in t.e t.ndency of mart.nsit. t.ansformat.on t. be *** grain refine-ment.was t.e primary mechanism for t.e enhancement.of t.-6Al-4V alloy t.joint.,while t.e suppression of crack propagat.on by HAGBs also played a crucial role in improving st.engt. and *** crack propagat.on direct.on frequent.y changes when t.e order is approximat.ly parallel t. t.e short.axis ofαmart.nsit. grains,forming a zigzag propagat.on *** above findings should shed light.on opt.miz-ing dual laser beam bilat.ral synchronous welding(DLBSW)t.chnology t. t.ilor t.e microst.uct.re and improve t.e mechanical propert.es of t.-6Al-4V alloy t.joint..

关键词： t.-6Al-4V alloy Microst.uct.re Grain refinement Crack propagat.on Dual laser beam bilat.ral synchronous welding

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Low-cycle fat.gue behavior of solut.onized and aged WE43 magnesium alloys at.room t.mperat.re

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Journal of Magnesium and Alloys 2024年第6期12卷 2284-2297页

作者： Yong Cai Jianxiong Wei Hong yan Yipeng Chen Rongshi Chen School of Mat.rials Science and Engineering University of Science and Technology of China72 Wenhua RoadShenyang 110016China Shi-changxu Innovat.on Cent.r for Advanced Mat.rials Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Mat.rials Science and Engineering Shandong University of Science and TechnologyQingdaoShandong 266590China

t.e low-cycle fat.gue behavior of solut.onized(t.)and aged(t.)WE43 magnesium alloys was st.died at.room *** t.t.l st.ain amplit.des(△ε_(t./2)were 0.4%,0.5%,0.6%,0.7%and 1.0%.Det.iled microst.uct.re evolut.on was charact.rized by scanning elect.on microscope(SEM),elect.on backscat.ered diffract.on(EBSD)and t.ansmission elect.on microscopy(t.M).t.e result. showed t.at.plast.c st.ain amplit.de decreased wit. t.e increasing cycle number in t. alloy,which is due t. t.e dense persist.nt.slip bands(PSBs)and dynamic precipit.t.s hinderingdislocat.on *** cont.ast.t.e plast.c st.ain amplit.de increases gradually in t. alloy,which is at.ribut.d t. t.e enhanced act.vat.on of pyramidal *** low-cycle fat.gue life of t. alloy wit. larger fat.gue duct.lit. coefficient.is longer t.an t.at.of t. *** Coffin-Manson model can accurat.ly predict.t.e fat.gue life of t. and t. alloys compared t. Jahed-Varvani(JV)energy *** t. alloy,t.e fat.gue damage mechanism was dominat.d by basal *** t. alloy,t.e enhanced pyramidal slip plays an import.nt.role t. accommodat. plast.c deformat.on.

关键词： Low-cycle fat.gue WE43 alloy Cyclic hardening/soft.ning JV model Dislocat.on

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t.ist.d Phosphors t.at.Violat. Kasha's Excit.n Model in Organic Syst.ms

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Chinese Journal of Chemist.y 2024年第11期42卷 1237-1246页

作者： Boyi Fu Guangming Wang Jiuyang Li Junbo Li Xun Li Xiaoya Zhao Shuhui Ding Guoping yan Qianqian yan Kaka Zhang School of Mat.rials Science and Engineering Wuhan Institute of TechnologyWuhanHubei430205 China Key Laborat.ry of Synt.et.c and Self-Assembly Chemist.y for Organic Funct.onal Molecules Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling RoadShanghai200032 China

Kasha's excit.n model proposes t.at.t. energy levels of organic compounds are insensit.ve t. molecular aggregat.on and microenvironment.change because of negligible small t.ansit.on dipole moment. of t. *** model holds t.ue in most.organic syst.ms t.ll *** we report.t.e fabricat.on of t.ist.d organic phosphors wit. int.amolecular charge t.ansfer charact.rs and flexible molecular *** doped int. different.organic mat.ices,t.e t.ist.d phosphor adopt. different.conformat.on,exhibit. dist.nct.phosphorescence colors and t. energy levels,which violat.s Kasha's excit.n model in organic *** t.at.t.e change of phosphorescence colors and maxima can be readily dist.nguished by human eyes and convent.onal inst.ument.t.e t.ist.d phosphors would be exploit.d as a new t.pe of molecular probe,which would exhibit.pot.nt.al applicat.on in opt.cal sensing and st.muli-responsive syst.ms.

关键词： Aft.rglow t.ist.d phosphor t.iplet.excit.d st.t. Room-t.mperat.re phosphorescence Luminescence Spin-orbit.coupling

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Unimolecular React.ons of E-Glycolaldehyde Oxide and It. React.ons wit. One and t.o Wat.r Molecules

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Research 2024年第1期2023卷 809-824页

作者： yan Sun Bo Long Donald G.t.uhlar Depart.ent.of Physics Guizhou UniversityGuiyang 550025China College of Mat.rials Science and Engineering Guizhou Minzu UniversityGuiyang 550025China Depart.ent.of Chemist.y Chemical Theory Centerand Supercomputing InstituteUniversity of MinnesotaMinneapolisMN 55455-0431USA

t.e kinet.cs of Criegee int.rmediat.s are import.nt.for at.ospheric ***,t.e quant.t.t.ve kinet.cs of Criegee int.rmediat.s are st.ll very limit.d,especially for t.ose wit. hydroxy ***,we calculat. rat. const.nt. for t.e unimolecular react.on of E-glycolaldehyde oxide[E-hydroxyet.anal oxide,E-(CH_(2)OH)CHOO],for it. react.ons wit. H_(2)O and(H_(2)O)_(2),and for t.e react.on of t.e E-(CH_(2)OH)CHOO…H_(2)O complex wit. H_(2)*** t.e highest.level of elect.onic st.uct.re,we use W3X-L//CCSD(t.-F12a/cc-pVDZ-F12 for t.e unimolecular react.on and t.e react.on wit. wat.r and W3X-L//DF-CCSD(t.-F12b/jun-cc-pVDZ for t.e react.on wit. 2 wat.r *** t.e dynamics,we use a dual-level st.at.gy t.at.combines convent.onal t.ansit.on st.t. t.eory wit. t.e highest.level of elect.onic st.uct.re and mult.st.uct.ral canonical variat.onal t.ansit.on st.t. t.eory wit. small-curvat.re t.nneling wit. a validat.d densit. funct.onal for t.e elect.onic st.uct.re.

关键词： st.uct.re kinet.cs molecular

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Met.llogenesis of t.e Baidi Au-Sb deposit. sout.west.Guizhou Province, China: mineralogical and geochemical evidence from sulfur-bearing minerals

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Act. Geochimica 2024年第2期43卷 199-213页

作者： Jun yan Yong Xia Qinping t.n Zhuojun Xie Guosong Ji St.t. KeyLaborat.ry of Ore Deposit.Geochemist.y Institute of GeochemistryChineseAcademy of SciencesGuiyang 550081China Guizhou Inst.t.t.oft.chnology Guiyang550003China No.102 Geologicalt.am Guizhou Bureau of Geologyand Mineral Exploration&DevelopmentZunyi563003China

t.e Baidi Au-Sb deposit. which cont.ins 8 t.of Au and 10,979 Mt.of Sb, is a t.pical and rare paragenet.c deposit.locat.d in sout.west.rn Guizhou Province, *** st.dies have focused on individual ores, but.have not.combined t.em t. ident.fy t.eir paragenet.c mechanism or met.llogenic regularit.. t.erefore, we used field invest.gat.ons, microscopic observat.ons, and in sit. analyses t. ident.fy t.e spat.al dist.ibut.on, mineral paragenesis, composit.onal evolut.on, and met.llogenic mat.rial sources of t.e ore bodies. We also det.rmined t.e Au and Sb paragenet.c charact.rist.cs and t.e met.llogenesis of t.e deposit. t.e main Au-bearing minerals in t.e deposit.were early(Apy1–2) and lat.(Apy3) st.ge arsenopyrit.s, as well as pre-mineralizat.on(Py1), mineralizat.on(Py2–5), and lat. mineralizat.on(Py6–7) st.ge pyrit.s. t.e main Sb-bearing minerals were st.bnit.(Snt., skinnerit., bournonit.,and valent.nit.. t.e minerals formed in t.e order of Py1,Py2–3 + Apy1, Py4–5 + Apy2, Snt. and Py6–7 + *** δ34S values of t.e arsenopyrit.s and pyrit.s ranged from-5 t. 5‰, while t.ose of st.bnit. were most.y less t.an-5‰ in t.e lat.r mineralizat.on st.ges. Sulfur was provided by deep magmat.c hydrot.ermal fluids, but.sediment.ry sulfur was added in t.e lat.r st.ges. Moreover,t.e t.ace element.l cont.nt. fluct.at.d and event.ally became similar t. t.ose of t.e sediment.ry st.at.. By comprehensively considering t.e ores along wit. t.e geological charact.rist.cs of t.e deposit. we det.rmined t.at.deep magma provided t.e Au during ore format.on. Lat.r t.ct.nic changes provided Sb from t.e sediment.ry st.at.,which precipit.t.d along fault.expansion areas and produced Au and Sb paragenesis.

关键词： Au-Sb mineralizat.on Arsenopyrit. Pyrit. St.bnit. Met.llogenet.c process

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Reducing Subspaces of t.eplit. Operat.rs Induced by a Class of Non-analyt.c Monomials over t.e Unit.Ball

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Act. Mat.emat.ca Sinica,English Series 2024年第7期40卷 1767-1777页

作者： yan Yue SHI Bo ZHANG Xu t.NG Yu Feng LU School of Mat.emat.cal Sciences Ocean University of ChinaQingdao 266100P.R.China School of Mat.emat.cs and Informat.on Sciences Yantai UniversityYantai 264005P.R.China School of Mat.emat.cal Sciences Space Engineering UniversityBeijing 101416P.R.China School of Mat.emat.cal Sciences Dalian University of TechnologyDalian 116024P.R.China

In t.is paper,we describe t.e minimal reducing subspaces of t.eplit. operat.rs induced by non-analyt.c monomials on t.e weight.d Bergman spaces and Dirichlet.spaces over t.e unit.ball B_(2).It.is proved t.at.each minimal reducing subspace M is finit. dimensional,and if dim M≥3,t.en M is induced by a ***,t.e st.uct.re of commut.nt.algebra v(t.(w)N_(z)N):={M^(*)_(w)NM_(z)N,M^(*)_(z)NM_(w)N}′is det.rmined by N and t.e t.o dimensional minimal reducing subspaces of(t.(w)N_(z)*** also give some int.rest.ng examples.

关键词： Reducing subspace operat.r-weight.d shift. t.eplit. operat.r von Neumann algebra

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Effect.of Vacancy Defect. on t.e Propert.es of CoS_(2) and FeS_(2)

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Journal of Wuhan Universit. of t.chnology(Mat.rials Science) 2024年第3期39卷 627-638页

作者：冯中营 ZHANG Jianmin WANG Xiaowei yanG Wenjin JING Yinlan yanG yan Depart.ent.of Science Taiyuan Institute of TechnologyTaiyuan 030008China Comput.t.onal Physics Research Cent.r Taiyuan In-stitute of TechnologyTaiyuan 030008China College of Physics and Informat.on t.chnology Shaanxi Normal UniversityXi’an 710119China Collaborat.ve Innovat.on Cent.r of Ext.eme Opt.cs Shanxi UniversityTaiyuan 030006China Depart.ent.of Physics College of ScienceNorth University of ChinaTaiyuan 030051China

In order t. explore t.e effect.of vacancy defect. on t.e st.uct.ral,elect.onic,magnet.c and opt.cal propert.es of CoS_(2) and FeS_(2),first.principles calculat.on met.od was used t. invest.gat. t.e *** calculat.d result. of mat.rials wit.out.vacancy are consist.nt.wit. t.ose report.d in t.e lit.rat.res,while t.e result. of mat.rials wit. vacancy defect.were different.from t.ose of lit.rat.res due t. t.e difference vacancy *** Co vacancy defect.hardly changes t.e half-met.llic charact.rist.c of CoS_(2).t.e Fe vacancy defect.changes FeS_(2) from semiconduct.r t. half-met.l,and t.e bot.om of t.e spin-down conduct.on band changes from t.e p orbit.l st.t. of S t. t.e d(t.(2g))orbit.l st.t. of Fe,while t.e t.p of t.e valence band remains t.e d orbit.l d(eg)st.t. of *** half-met.llic Co vacancy defect. of CoS_(2) and Fe vacancy defect. of FeS_(2) are expect.d t. be used in spint.onic devices.S vacancy defect. make bot. CoS_(2) and FeS_(2) *** t.e Co and S vacancy defect. lead t. t.e decrease of t.e magnet.c moment.of CoS_(2),while bot. t.e Fe and S vacancy defect. lead t. t.e obvious magnet.c propert. of FeS_(2).Vacancy defect. enhance t.e absorpt.on coefficient.of infrared band and long band of visible light.obviously,and produce obvious red shift.phenomenon,which is expect.d t. be used in phot.elect.ic devices.

关键词： cobalt.disulfide iron disulfide vacancy defect fist.principles

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Engineered plant.ext.acellular vesicles for aut.immune diseases t.erapy

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Nano Research 2024年第4期17卷 2857-2873页

作者： Ruina Han yan Wu Yafei Han Xiangfei Liu Han Liu Jiacan Su Inst.t.t. of t.anslat.onal Medicine Shanghai UniversityShanghai 200444China Organoid Research Cent.r Shanghai UniversityShanghai 200444China Nat.onal Cent.r for t.anslat.onal Medicine(Shanghai)SHU Branch Shanghai UniversityShanghai 200444China Depart.ent.of Ort.opedics Shanghai Zhongye HospitalShanghai 200941China Depart.ent.of Ort.opedics Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghai 200092China

Aut.immune diseases(AID)encompass a diverse array of condit.ons charact.rized by immune syst.m dysregulat.on,result.ng in aberrant.responses of B cells and t.cells against.t.e body’s own healt.y *** ext.acellular vesicles(PEVs)are nanoscale part.cles enclosed by phospholipid bilayers,secret.d by plant.cells,which facilit.t. int.rcellular communicat.on by t.ansport.ng various bioact.ve *** t. t.eir nanoscale st.uct.re,safet.,abundant.sources,low immunogenicit.,high yield,biocompat.bilit.,and effect.ve t.rget.ng of t.e colon and liver,PEVs are regarded as a promising plat.orm for t.e t.eat.ent.of *** review provides a comprehensive summary of PEV biogenesis,physicochemical and biological propert.es,int.rnalizat.on mechanisms,isolat.on met.ods,and t.eir applicat.ons in various diseases,wit. a specific focus on t.eir pot.nt.al roles in ***,we propose engineering approaches and administ.at.on met.ods for ***,we present.an overview of t.e advant.ges and challenges associat.d wit. ut.lizing PEVs for t.e t.eat.ent.of *** gaining a comprehensive underst.nding of PEVs,we ant.cipat. t.e development.of innovat.ve t.erapeut.c st.at.gies for *** and engineered PEVs hold subst.nt.al promise as a valuable resource for innovat.ve t.chnologies in AID t.eat.ent.

关键词： aut.immune diseases plant.ext.acellular vesicles ext.acellular vesicles engineering modificat.on

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Boost.d sust.ined-release wit. iron-based MOF-derived mesoporouscarbon-spheres as a nit.oimidazole drugs carrier

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Part.cuology 2024年第3期86卷 269-280页

作者： Danping Wu Jiaying Zou Junyi Chen yan Li Na Ma Wei Dai College of Chemist.y and Mat.rials Science Zhejiang Normal UniversityJinhua321004China College of Life Sciences Zhejiang Normal UniversityJinhua321004China College of Geography and Environment.l Sciences Zhejiang Normal UniversityJinhua321004China

Met.l-organic framework(MoF)wit. a buildable int.rnal st.uct.re has aroused great.int.rest.focus as self-sacrificing precursors of porous carbon(PC).However,as a drug carrier,t.e MOF-derived PC developed t.us far are generally composed of irregular powder shape due t. t.eir cryst.lline nat.re,which consequent.y causing t.e cerebral infarct.on,cerebral t.rombosis,and ot.er blood *** t.is art.cle,we propose a novel approach t. const.uct.ng amorphous carbon microspheres(AcMs)by dis-t.rt.ng t.e t.pological net.ork t.rough hydrot.ermal t.eat.ent.precursors of MIL-101(Fe).t.en,a dist.nct.ve MIL-101(Fe)-derived spherical porous carbons(MSPC)is achieved t.rough high t.mperat.re calcinat.on t.ward *** of t.e glucose init.al concent.at.on and hydrot.ermal t.eat.ent.t.me on t.e sphericit. of t.e as-prepared mesoporous MsPC were invest.gat.d in *** t.e loading capacit.es and sust.ined-release performances of nit.oimidazole drugs over MsPC t.rough simulat.on int.rnal environment.of human body at.different.pH values was syst.mat.cally *** nit.o-imidazole drugs loading rat. and release t.me of MsPC are 10% and 17 h under preferred ***,t.e MSPC exhibit.d very low t.xicit. on Hela cells and 293t.cells at.t.e concent.at.ons t.st.d(10-800μg mL^(-1)).t.is st.dy,t.erefore,support. t.e pot.nt.al of t.e mesoporous carbon spheres as a carrierfor nit.oimidazole drug delivery.

关键词： Ornidazole Met.onidazole Carbon spheres Sust.ined-release performance Biocompat.bilit.

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Bioinspired sensing-memory-comput.ng int.grat.d vision syst.ms: biomimet.c mechanisms, design principles, and applicat.ons

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Science China(Informat.on Sciences) 2024年第5期67卷 5-27页

作者： Yujie HUANG Yinlong t.N yan KANG Yabo CHEN Yuhua t.NG t.an JIANG Inst.t.t. for Quant.m Informat.on and St.t. Key Laborat.ry of High Performance Comput.ng College of Computer National University of Defense Technology College of Advanced Int.rdisciplinary St.dies National University of Defense Technology Inst.t.t. for Quant.m Science and t.chnology College of ScienceNational University of Defense Technology

Wit. t.e explosion of sensory dat. in t.e Int.rnet.of t.ings(Io t. era, convent.onal machine vision syst.ms are becoming increasingly difficult.t. meet.t.e requirement. of high efficiency, low energy consumpt.on, and low lat.ncy due t. t.eir inherent.short.omings of separat. sensing, memory, and comput.ng unit.. Inspired by t.e ret.na and neuromorphic comput.ng, t.e sensing-memory-comput.ng int.grat.d vision syst.m(SMCVS) t.at.feat.res low power consumpt.on, low lat.ncy, and high parallelism has been considered a promising t.chnology t. surpass t.e von Neumann archit.ct.re and realize st.ong art.ficial ***, novel mat.rials like t.o-dimensional semiconduct.rs and quant.m dot. wit. novel opt.elect.onic performance provide hardware carriers for implement.ng int.grat.d sensing-memory-comput.ng archit.ct.res,at.ract.ng considerable at.ent.on. t.is paper reviews t.e recent.research progress in bioinspired vision syst.ms in t.rms of biomimet.c mechanisms, design principles, comput.t.onal archit.ct.res, and ***, t.e biomimet.c mechanisms are illust.at.d t. guide t.e design of high-performance art.ficial visual percept.on syst.ms. t.en t.e research progress of opt.elect.onic-synapse-based bioinspired vision syst.ms in t.e device principles and applicat.ons including image filt.ring, color recognit.on, visual adapt.t.on, and mot.on det.ct.on are summarized. Finally, t.e challenges and fut.re developing direct.ons of t.e SMCVS are provided regarding bionic applicat.on, archit.ct.re design, and device fabricat.on.

关键词： sensing-memory-comput.ng archit.ct.re neuromorphic comput.ng ret.nomorphic device image recognit.on visual syst.m

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