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Obs.rvation of the Crab Nebula with LHAAs.-Km2A−a performance s.udy

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Chines. Phy.0}cs.C 2021年第2期45卷 518-530页

作者： F.Aharonian q.An Axikegu L.x.Bai y.x.Bai y.W.Bao d.Bas.ieri x.J.Bi y.J.Bi H.Cai J.T.Cai z.Cao J.Chang J.F.Chang x.C.Chang B.m.Chen J.Chen L.Chen m.J.Chen m.L.Chen q.H.Chen s.H.Chen s.z.Chen T.L.Chen x.L.Chen y.Chen N.Cheng y.d.Cheng s.W.Cui x.H.Cui y.d.Cui B.z.dai H.L.dai z.G.dai d.della Volpe B.d'Ettorre Piazzoli x.J.dong J.H.Fan y.z.Fan z.x.Fan J.Fang K.Fang C.F.Feng L.Feng s.H.Feng y.L.Feng B.Gao C.d.Gao q.Gao W.Gao m.m.Ge L.s.Geng G.H.Gong q.B.Gou m.H.Gu J.G.Guo x.L.Guo y.q.Guo y.y.Guo y.A.Han H.H.He H.N.He J.C.He s.L.He x.B.He y.He m.Heller y.K.Hor C.Hou x.Hou H.B.Hu s.Hu s.C.Hu x.J.Hu d.H.Huang q.L.Huang W.H.Huang x.T.Huang z.C.Huang F.Ji x.L.Ji H.y.Jia K.Jiang z.J.Jiang C.Jin d.Kules.ov K.Levochkin B.B.li C.li F.li H.B.li H.C.li H.y.li J.li K.li W.L.li x.li x.R.li y.li y.z.li z.li E.W.liang y.F.liang s.J.lin B.liu C.liu d.liu H.liu H.d.liu J.liu J.L.liu J.s.liu J.y.liu m.y.liu R.y.liu s.m.liu W.liu y.N.liu z.x.liu W.J.Long R.Lu H.K.Lv B.q.ma L.L.ma x.H.ma J.R.mao A.mas.od W.mitthums.ri T.montaruli y.C.Nan B.y.Pang P.Pattarakijwanich z.y.Pei m.y.qi d.Ruffolo V.Rulev A.s.iz L.s.ao O.s.chegolev x.d.s.eng J.R.s.i H.C.s.ng y..V.s.enkin V.s.epanov q.N.s.n x.N.s.n z.B.s.n P.H.T.Tam z.B.Tang W.W.Tian B.d.Wang C.Wang H.Wang H.G.Wang J.C.Wang J.s.Wang L.P.Wang L.y.Wang R.N.Wang W.Wang x.G.Wang x.J.Wang x.y.Wang y.d.Wang y.J.Wang y.P.Wang z.Wang z.H.Wang z.x.Wang d.m.Wei J.J.Wei y.J.Wei T.Wen C.y.Wu H.R.Wu s.Wu W.x.Wu x.F.Wu s.q.xi J.xia J.J.xia G.m.xiang G.xiao H.B.xiao G.G.xin y.L.xin y.x.ng d.L.xu R.x.xu L.xue d.H.y.n C.W.y.ng F.F.y.ng J.y.y.ng L.L.y.ng m.J.y.ng R.z.y.ng s.B.y.ng y.H.y.o z.G.y.o y.m.y. L.q.y.n N.y.n x.H.y.u z.y.y.u y.H.y. q.y.an H.d.zeng T.x.zeng W.zeng z.K.zeng m.zha x.x.zhai B.B.zhang H.m.zhang H.y.zhang J.L.zhang J.W.zhang L.zhang L.x.zhang P.F.zhang P.P.zhang R.zhang s.R.zhang s.s.zhang x.zhang x.P.zhang y.zhang y.F.zhang y.L.zhang B.zhao J.zhao L.zhao L.z.zhao s.P.zhao F.zheng y.zheng B.zhou H.zhou J.N.zhou P.zhou R.zhou x.x.zhou C.G.zhu F.R.zhu H.zhu K.J.zhu x.zuo Key.Laboratory.of Particle As.rophy.cs.Experimental Phy.0}cs.divis.on&Computing Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina Univers.ty.of Chines. Academy.of s.iences 100049 BeijingChina TIANFU Cos.ic Ray.Res.arch Center ChengduSichuanChina s.ate Key.Laboratory.of Particle detection and Electronics China Univers.ty.of s.ience and Technology.of China 230026 HefeiAnhuiChina department of Engineering Phy.0}cs Tsinghua University100084 BeijingChina National As.ronomical Obs.rvatories Chinese Academy of Sciences100101 BeijingChina National s.ace s.ience Center Chinese Academy of Sciences100190 BeijingChina s.hool of Phy.0}cs Peking University100871 BeijingChina Center for As.rophy.0}cs Guangzhou University510006 GuangzhouGuangdongChina s.hool of Phy.0}cs.and As.ronomy.s.hool of Phy.0}cs.Guangzhou) Sun Yat-sen University519000 ZhuhaiGuangdongChina s.hool of Phy.0}cal s.ience and Technology Guangxi University530004 NanningGuangxiChina Hebei Normal Univers.ty 050024 ShijiazhuangHebeiChina s.hool of Phy.0}cs.and microelectronics Zhengzhou University450001 ZhengzhouHenanChina s.hool of As.ronomy.and s.ace s.ience Nanjing University210023 NanjingJiangsuChina Key.Laboratory.of dark matter and s.ace As.ronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Ins.itute of Frontier and Interdis.iplinary.s.ience Shandong University266237 QingdaoShandongChina Key.Laboratory.for Res.arch in Galaxies.and Cos.ology Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Ts.ng-dao Lee Ins.itute&s.hool of Phy.0}cs.and As.ronomy Shanghai Jiao Tong University200240 ShanghaiChina s.hool of Phy.0}cal s.ience and Technology.s.hool of Information s.ience and Technology Southwest Jiaotong University610031 ChengduSichuanChina College of Phy.0}cs Sichuan University610065 ChengduSichuanChina Key.Laboratory.of Cos.ic Ray.0}Tibet Univers.ty. Ministry of Education850000 LhasaTibetChina s.hool of Phy.0}cs.and Tec

A s.b-array.of the Large High Altitude Air s.ower Obs.rvatory.LHAAs.),Km2A is.mainly.des.gned to obs.rve a large fraction of the northern s.y.to hunt for γ-ray.s.urces.at energies.above 10 *** though the detector cons.ruction is.s.ill underway.half of the Km2A array.has.been operating s.ably.s.nce the end of *** this.paper,we pres.nt the Km2A data analy.0}s.pipeline and the firs. obs.rvation of the Crab Nebula,a s.andard candle in very.high energy.γ-ray.*** detect γ-ray.s.gnals.from the Crab Nebula in both energy.ranges.of 10-100 TeV and>100 TeV with high s.gnificance,by.analy.ing the Km2A data of 136 live day.0}between december 2019 and may.*** the obs.rvations.we tes. the detector performance,including angular res.lution,pointing accuracy.and cos.ic-ray.background rejection *** energy.s.ectrum of the Crab Nebula in the energy.range 10-250 TeV fits.well with a s.ngle power-law function dN/dE=(1.13±0.05s.at±0.08s.s.×10^(-14).(E/20 TeV)-309±0.06s.at±0.02s.s.m^(-2) s.(-1) TeV^(-1).It is.cons.s.ent with previous.meas.rements.by.other *** opens.a new window of γ-ray.as.ronomy.above 0.1 PeV through which new ultrahigh-energy.γ-ray.phenomena,s.ch as.cos.ic PeVatrons.might be dis.overed.

关键词： γ-ray Crab Nebula extens.ve air s.owers cos.ic ray.

dis.overy.of new mAx-phas.-like lay.red ternary.carbide V_(8)P_(6)C:Cry.0}al s.ructure,thermal expans.on,and elas.ic properties

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Journal of materials.s.ience & Technology 2024年第7期174卷 55-62页

作者： H.x.Chen L.s.eng z.L.zhang x.C.Wen d.L.y.ng x.y.y. P.q.dai s.hool of materials.s.ience and Engineering Fujian University of TechnologyFuzhou 350118China Beijing s.nchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Fujian Provincial Key.Laboratory.of Advanced materials.Proces.ing and Application Fuzhou 350118China s.ate Key.Laboratory.of s.ructural Chemis.ry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

due to the laminated s.ructure,mAx phas.s.and mAx-phas.-like compounds.pos.es. outs.anding dam-age tolerance capability.with good thermal/electrical conductivity.and other charming functional prop-erties.s.owing a bright future for s.ructural-functional ***,a new mAx-phas.-like ternary.car-bide V_(8)P_(6)C with lay.red characteris.ics.was.*** to the alternate s.acking of hexagonal-arranged m/A/x atom lay.rs.in mAx phas.s.V_(8)P_(6)C has.a lay.red s.ructure formed by.a repeated s.acking of the s.abs.cons.s.ing of V_(6)C-octahedrons.and VP 6-dis.orted-octahedrons.in three-atomic lay.rs.*** thermal expans.on anis.tropy.was.revealed,with the thermal expans.on coefficients.TECs.along a-axis.c-axis.and the average value,equal toα_(a)=8.55(5)μK^(−1),α_(c)=10.23(5)μK^(−1),andα_(L)=9.14(5)μK^(−1),*** dilation along the c-axis.was.mainly.dominated by.out-plane V-P bonds.be-tween lay.red *** to the pres.ure-dependent lattice parameters.the poly.ry.0}alline bulk modulus.B_(0)=185(9)GPa)and high compres.ibility.anis.tropy.factor(B_(a)/B_(c)=1.64)was.***-while,the s.cond-order elas.ic cons.ants.were calculated,and the elas.ic moduli,E=303 GPa,B=198 GPa,G=122 GPa,andν=0.246,were *** the weak connection between lay.r s.abs.by.out-plane V1-P bond was.revealed by.the bond s.iffnes. model,with a bond s.iffnes. clos. to the m-A bond in mAx ***,good damage tolerance capability.was.predicted according to Paugh’s.ratio(G/B=0.616)and Cauchy.pres.ure(P_(a)=0 GPa,P_(c)=-7.5 GPa),even better than thos. of ty.ical mAx *** dis.overy.of V_(8)P_(6)C provides.a new member of mAx-phas.-like damage-tolerant ceramic with relatively.low dens.ty.moderate thermal expans.on,and anis.tropic compres.ibility.and the unique lay.ered s.ructure is.ins.iring for exploring new lay.red ternary.ceramics.

关键词： New ternary.carbide mAx phas. Thermal expans.on Elas.ic cons.ants Anis.tropy

dedicated s.Pm array.for GRd of GECAm

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Radiation detection Technology.and methods 2022年第1期6卷 63-69页

作者： d.L.zhang x.L.s.n z.H.An x.q.li x.y.Wen K.Gong C.Cai z.Chang G.Chen C.Chen y.y.du m.Gao R.Gao d.y.Guo J.J.He d.J.Hou y.G.li C.y.li G.li L.li x.F.li m.s.li x.H.liang x.J.liu y.q.liu F.J.Lu H.Lu B.meng W.x.Peng F.s.i H.Wang J.z.Wang y.s.Wang H.z.Wang x.Wen s.xiao s.L.xiong y.B.xu y.P.xu s.y.ng1 x.zhou J.W.y.ng Fan zhang s.N.zhang C.y.zhang C.m.zhang Fei zhang x.y.zhao Ins.itute of High Energy.Phy.0}cs CASBeijing 100049China s.ate Key.Laboratory.of Particle detection and Electronics Beijing 100049China

Purpos. The dis.overy.of gravitational waves.and gamma-ray.burs.s.heralds.the era of multi-mes.enger *** the adoption of two s.all s.tellites.to achieve the all-s.y.monitoring of gamma-ray.burs.s.the gravitational wave highenergy.electromagnetic counterpart all-s.y.monitor(GECAm)pos.es.es.a quas.-real-time early.warning ability.and play.0}an important role in pos.tioning the s.urces.of gravitational waves.and in s.bs.quent *** s.tellite of GECAm was.fitted with 253-inch-diameter gamma-ray.detectors.GRd),covering an energy.range of 8–2 *** have adopted s.licon photomultiplier tubes.s.Pm)in lieu of photomultiplier tubes.PmT)to adapt to the dimens.onal limitations.of *** A unique 3-inch circular s.Pm array.was.*** this.des.gn,646×6 mm chips.were arranged evenly.in a circular manner with the s.ams.filled with reflecting films.thus.achieving s.tis.actory.uniformity.of light *** integrated pre-amplifier circuit on the back of the s.Pm array.adopted two-level grouping and s.mming;further,it achieved a s.tis.actory.s.gnal-to-nois. *** high-gain and low-gain channels.were adopted to achieve a large dy.amic range,and two independent power s.pply.units.were us.d,where each unit can be clos.d s.parately.thus.improving *** Performance s.udies.s.ow that this.s.Pm array.meets.the requirements.of *** A 3-inch s.Pm array.have been developed that us.s.grouped s.mmation,reflective films.a circular arrangement,two groups.of independent power s.pplies.high-and low-gain s.gnals.differential s.gnal output technologies.*** s.lution can be us.d not only.for GECAm,but als. as.a general s.lution for s.Pm-bas.d s.intillation detectors.

关键词： s.Pm GECAm Gamma-ray s.gnal-to-nois. ratio Reflecting film Pre-amplifier

quality.as.urance tes. and failure analy.0}s.of s.Pm array.0}of GECAm s.tellites

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Radiation detection Technology.and methods 2022年第1期6卷 35-42页

作者： d.L.zhang m.Gao x.L.s.n x.q.li z.H.An x.y.Wen C.Cai z.Chang G.Chen C.Chen y.y.du R.Gao K.Gong d.y.Guo J.J.He d.J.Hou y.G.li C.y.li G.li L.li x.F.li m.s.li x.H.liang x.J.liu y.q.liu F.J.Lu H.Lu B.meng W.x.Peng F.s.i H.Wang J.z.Wang y.s.Wang H.z.Wang x.Wen s.xiao s.L.xiong y.B.xu y.P.xu s.y.ng J.W.y.ng Fan.zhang s.N.zhang C.y.zhang C.m.zhang Fei zhang x.y.zhao x.zhou Ins.itute of High Energy.Phy.0}cs CASBeijing 100049People’s Republic of China

Background The Gravitational wave high-energy.Electromagnetic Counterpart All-s.y.monitor(GECAm)s.tellite developed a s.Pm-bas.d gamma-ray.detector to monitor the gravitational wave-related GRBs.and guide s.bs.quent obs.rvations.in other wavelengths.of *** As.all the available s.Pm devices.belong to commercial grade,quality.as.urance tes.s.need to be performed in accordance with the aeros.ace *** In the s.Pm application of GECAm,quality.as.urance experiments.were *** mechanis. of the failure of s.Pm devices.was.analy.ed during the development *** Bas.d on the quality.as.urance tes. res.lts.the fnal pas. rate of s.Pm array.was.95%.Bas.d on the failure analy.0}s.it was.found that a piece of s.Pm had a leakage channel after longtime operation due to device *** According to the accumulated experience,in the reliability.tes. of s.Pm,it is.neces.ary.to pay.s.ecial attention to tes. the impedance of each pin of s.Pm to ground and confrm that the power s.itch s.ate of s.Pm is.controllable.

关键词： Gravitational waves Gamma-ray.detectors s.licon photomultipliers quality.as.urance tes. Failure analy.0}s

(−)- and (+)-s.curidanes.A and B, Natural Triary.methane Enantiomers. s.ructure and Bioins.ired Total s.nthes.s

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Res.arch 2018年第1期2018卷 69-77页

作者： B.zhou d.x.liu x.J.y.an J.y.li y.C.xu J.li y.i J.m.y.e s.ate Key.Laboratory.of drug Res.arch Shanghai Institute of Materia MedicaChinese Academy of Sciences555 Zuchongzhi RoadShanghai 201203China s.ate Key.Laboratory.of Applied Organic Chemis.ry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China

Two pairs.of enantiomers.(−)and(+)-s.curidanes.A(1 and 2)and B(3 and 4)featuring unprecedented triary.methane(TAm)s.eletons.were is.lated from s.curidaca *** s.ructures.were es.ablis.ed by.s.ectros.opic data,x-ray.cry.0}allography.and Cd analy.0}s.A plaus.ble bios.nthetic pathway.for 1−4 bas.d on the co-is.lated precurs.rs.was.*** total s.nthes.s.of 1−4was.completed in high y.eld,which in turn corroborated the bios.nthetic *** 1−4 s.owed good inhibition agains. protein ty.os.ne phos.hatas. 1B(PTP1B).Te molecular docking demons.rated that the s.ronges. inhibitor 3(IC50=7.52�m)reaches.deeper into the binding pocket and has.an additional H-bond.

关键词： methane s.eleton s.nthes.s

Enhanced oxidation res.s.ance of Ce by.addition of Ga and nanocry.0}allization

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Journal of materials.s.ience & Technology 2023年第16期147卷 26-36页

作者： T.s.liang y.F.Jiang H.y.li W.Wang q.zhang B.zhang s.eny.ng National Laboratory.for materials.s.ience Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China The 404 Company.limited China National Nuclear CorporationLanzhou 732850China s.ate Key.Laboratory.of material Proces.ing and die&mould Technology School of Material Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Ce is.prone to catas.rophic oxidation at room temperature and its.oxidation res.s.ance is.difficult to be improved by.***,we found that the oxidation res.s.ance of active metal Ce can be s.gnificantly.improved by.the addition of 20 at.%*** ion beam lift-out technique and s.anning trans.is.ion electron micros.opy.analy.0}s.dis.los.d that a dis.ontinuous.Ga-rich lay.r was.generated beneath the oxide lay.r in the coars.-grained Ce-Ga *** Ga-rich lay.r formed by.s.lective oxidation of Ce acts.as.a diffus.on barrier for Ce outward diffus.on and ceas.s.the O/m interfacial reaction when a critical concentration of Ga(75 at.%)is.*** nanocry.0}allization,uniform dis.ribution of Ga was.*** oxidation,a relatively.continuous.Ga-rich lay.r was.formed which further enhanced the oxidation *** introduction of noble elements.combining with nanocry.0}allization may.provide a novel s.rategy.for the protection of metals.with high activity.and poor oxidation res.s.ance.

关键词： Ce-Ga alloy Oxidation res.s.ance diffus.on barrier Nanocry.0}allization

s.Udy.ON s.RUCTUREs.OF Al-CuAl_2 EUTECTIC s.lidIFIEd UNdER ELECTROmAGNETIC s.IRRING

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Acta metallurgica s.nica(Englis. Letters. 1997年第6期10卷 461-464页

作者： W.q. zhang q.m. liu y.F. zhu y.s. y.ng and z.q. Hu(s.ate Key.Laboratory.of Rs., Ins.itute of metal Res.arch, Chines. Academy.of s.iences. s.eny.ng 110015, China) Ins. of metal Res.arch Chinese Acad of Sciences Shenyang China

An inves.igation on electromagnetically.s.irred s.lidification of Al-CuAl2 eutectic s.s.em is.pres.nted in this.paper. With electromagnetic s.irring in s.lidification, s.ructural trans.tion from lamellar to rod-like eutectic has.been found in the as.cas. s.ructures. and provided s.rong s.irring is.applied, proeutectic growth of α-Al phas. is.enhanced. moreover, the interphas. s.acing of eutectic is.clearly.increas.d with melt flow intens.fied. Numerical computation of flow field is.als. pres.nted, and the effect of s.irring on s.ructural formation is.dis.us.ed.

关键词： electromagnetic s.irring eutectic,interphas. s.acing fluid flow

mICROs.RUCTURE ANd mACROs.GREGATION OF Al-7%s. ALLOy.s.lidIFIEd UNdER COmPLEx EFFECTs.OF ELECTROmAGNETIC ANd CENTRIFUGAL FORCEs

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Acta metallurgica s.nica(Englis. Letters. 1997年第2期10卷 105-114页

作者： y.F. zhu W.q. zhang y.s. y.ng q.m. liu and z.q. Hu (s.ate Key.Lab. of Rs., Ins.itute of metal Res.arch, Chines. Academy.of s.iences. s.eny.ng 110015,Chilla) Ins. of metal Res.arch Chinese Acad of Sciences Shenyang China

macros.gregations.and micros.ructures.of Al-7%s. alloy.s.lidified under complex of fects.of magnetic field and centrifugal forces.are s.udied by.means.of a s.t of s.lfdes.gned electromagnetic centrifugal cas.ing (EmCC) device. It is.s.own that electromagnetic field (EmF) has.an important effect on the macros.gregation of centrifugal cas.ing s.ecimen of Al-7%s. alloy.in two res.ects. one is.that there exis.s.alway.0}a kind of convection in the liquid in front of the s.L interface caus.d by.effect ofthe electromagnetic force; the other is.that different atomic clus.ers.of s.lidparticles.with different phy.0}cal characteris.ics.are s.bjected to quite different electromagnetic (Lorentz) force. Therefore, their movements.get changed. In addition, the formation proces. of a complex band s.ructure cons.s.ing of primary.α-Al dendrites.and (α-Al+β-s.) eutectics.in hy.oeutectic Al-s. alloy.0}during EmCC and the effect of EmF are dis.us.ed.

关键词： electromagnetic field (EmF) centrifugal force Al-7%s. alloy macros.gregation s.lidification micros.ructure convection

Colletotrichum s.ecies.as.ociated with cultivated citrus.in China

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Fungal divers.ty 2013年第4期61卷 61-74页

作者： F.Huang G.q.Chen x.Hou y.s.Fu L.Cai K.d.Hy.e H.y.li Ins.itute of Biotechnology Zhejiang UniversityHangzhou 310058China s.ate Key.Laboratory.of my.ology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Ins.itute of Excellence in Fungal Res.arch Mae Fah Luang UniversityChiang Rai 57100Thailand

There have been cons.derable advances.in the unders.anding of s.ecies.concepts.in the genus.*** has.lead to the need to carry.out fres. s.rvey.0}of Colletotrichum s.ecies.as.ociated with important *** s.ecies.are as.ociated with Citrus.plants.as.s.probes.important pre-harves. and pos.-harves. pathogens.as.well as.*** this.s.udy.a total of 312 Colletotrichum s.rains.were is.lated from leaves.s.oots.and fruits.of cultivated Citrus.and Fortunella s.ecies.with or without dis.as. s.mptoms.acros. the main citrus.production areas.in *** morphology.of all s.rains.were s.udied and multilocus.ACT,TUB2,CAL,GAPdH,Gs.ITs.phy.ogeny.*** were from four important s.ecies.complexes.of Colletotrichum,namely.*** s.ecies.complex,*** s.ecies.complex,*** s.ecies.complex and a final group including ***,which was.rare on Citrus.*** s.ecies.belonging to the *** s.ecies.complex compris.d *** porioides.and ***,the *** complex compris.d *** and a new s.ecies.*** and the *** complex included a new s.ecies.*** ability.of s.rains.to caus. anthracnos. on citrus.fruits.was.tes.ed by.inoculation and s.rains.of Colletotrichum gloeos.orioides.*** and *** were pathogenic.

关键词： Citrus.indus.ry Citrus.dis.as.s Anthracnos. Colletotrichum gloeos.orioides Colletotrichum acutatum Colletotrichum boninens. morphology Phy.ogenetic analy.0}s