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Evolution of microstructure and texture in copper during repetitive extrusion-upsetting and subseq.ent annealing

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j.urnal of Materials science & Technology 2017年第7期33卷 690-697页

作者： q.chen D.y.shu j.Lin y.wu X.s.Xia s.h.huang Z.D.zhao O.V.Mishin G.L.wu state Key Laboratory of Mechanical Transmission Chongqing University Chongqing 400044 China

The evolution of the microstructure and texture in copper has been studied during repetitive extrusionupsetting（REU） to a total von Mises strain of 4.7 and during subseq.ent annealing at different temperatures. It is found that the texture is significantly altered by each deformation pass. A duplex 001 ＋ 111 fiber texture with an increased 111 component is observed after each extrusion pass,whereas the 110 fiber component dominates the texture after each upsetting pass. During REU, the microstructure is refined by deformation-induced boundaries. The average cell size after a total strain of 4.7 is measured to be ~0.3 μm. This refined microstructure is unstable at room temperature as is evident from the presence of a small number of recrystallized grains in the deformed matrix. Pronounced recrystallization took place during annealing at 200？c for 1 h with recrystallized grains developing predominantly in high misorientation regions. At 350？c the microstructure is fully recrystallized with an average grain size of only 2.3 μm and a very weak crystallographic texture. This REU-proc.s.ed and subseq.ently annealed material is considered to be potentially suitable for using as a material for sputtering targets.

关键词： severe plastic deformation Repetitive extrusion-upsetting copper Deformation microstructure Texture Annealing

A Review of Botulism in china

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Biomedical and Environmental sciences 1990年第3期3卷 326-336页

作者： gao q.y. hUANG y.F. wu j.G. LIU h.D. XIA h.q Institute of Food safety control and Inspection Ministry of Public Health 29 Nan Wei Road Beijing 100050 sanitary and Antiepidemic.s.ation of Urumq. city Urumqi Xinjiang Autonomous Region sanitary and Antiepidemic.s.ation of Tachen District Tachen Xinjiang Autonomous Region Pipeline Bureau hospital Ministry of Petroleum Langfang HebeiPeople's Republic of China

The epidemiological characteristics and etiology of botulisin in china, as well as the distribution of different types of clustridium bolulinum in china; are *** 1989, 15 provinc.s.and autonomous regions reported the occurrence of *** were 2861 c.s.s involved in 745 *** the c.s.s 421 died, with a c.s. fatality of 14.7%.The main epidemiological characteristics of botulism in china are: (i) the maj.r foods causing botulism are homemade fermented bean produc.s.which accounted for 62.6% of the c.s.s; (ii) the incubation period is longer (3 h-54 days) than that described in the western literature (mostly 2-7 days); (iii) the peak occurrence is from February to May; (iv) the progression of symptoms and signs is slower than that of western *** types of *** the exception of type G, have been found in *** distribution of various types of *** is significantly different between southern and northern china; this is related to the latitude and is correlated with the prevalence of this *** of the botulism outbreaks occurred above 30° north latitude in northern china and outbreaks rarely occurred below 30° north *** surveys showed that the average detection rate of c bolulinum spores in soil and foods in the northern parts of china was 14.8%.while it was only 2.5% in the *** types A, B, *** F, which are involved in human botulism, were freq.ently found in the North, while types c and D, which are involved only in animal intoxication, were found more freq.ently in the south. 1990 Academic ***.

关键词： In A Review of Botulism in china

Improving high-temperature mechanical properties of c.s. crFecoNi high-entropy alloy by.h.ghly thermostable in-situ precipitated carbides

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j.urnal of Materials science & Technology 2021年第13期72卷 29-38页

作者： X.W.Liu N.gao j.Zheng y.wu y.y.zhao q.chen W.Zhou s.Z.Pu W.M.j.ang Z.T.Fan state Key Laboratory of Materials Proc.s.ing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Institute of Nuclear Physics and chemistry China Academy of Engineering PhysicsMianyang 621999China state Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China school of Materials Engineering Purdue UniversityWest LafayetteIN 47907USA southwest Technology and Engineering Research Institute Chongqing 400039China center for Electron Microscopy Wuhan UniversityWuhan 430072China

The cr Fe co Ni high-entropy alloy.h.A)exhibits excellent mechanical properties at lower temperatures due to its low stacking-fault energy.h.wever,its medium-and high-temperature strengths are still *** consideration of the potential diversified applications,more strengthening approaches except for the previously proposed L12 phase hardening deserve further exploration due to its rapid coarsening tendency at high ***,we achieved significant high-temperature strengthening of the c.s. cr Fe co Ni hEA by in-situ precipitation of highly thermostable *** with 0.5 at.%and 1 at.%niobium and carbon were prepared by simple c.s.ing proc.s.es,*** c.s.,solute solution and aging.A highly thermostable microstructure was formed,which comprises very coarse grains accompanied with extensive thermostable carbide precipitates embedded,including submicrometer coherent Nb c particles in grain interiors and intergranular coherent M_(23)c_(6)*** high thermostability of microstructure,which is beneficial for the high-temperature loading,is ascribed to the synergy of lacking growth driving force and Zenner pinning effect by the *** properties tested at 673,873 and1073 K show that the yield strength and ultimate tensile strength are significantly increased by Nb/c doping,along with the elongation escalation at higher *** strengthening is mainly due to the precipitation hardening of carbide particles.

关键词： high-entropy alloy carbides Precipitation high-temperature property strengthening

subpulse Drifting of PsR j.110–5637

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Research in Astronomy and Astrophysics 2022年第6期22卷 109-117页

作者： s.j.Dang L.h.shang L.Lin q.j.Zhi R.s.zhao c.B.wu Z.y.you A.j.Dong j.T.Bai X.Xu D.D.Zhang h.yang q.W.Lin school of Physics and Electronic.s.ience Guizhou Normal UniversityGuiyang 550001China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Proc.s.ing Guizhou Normal UniversityGuiyang 550001China school of Physics science and Technology Xinjiang UniversityUrumqi 830011China

We report a detailed study of polarization characteristics and subpulse drifting in PsR j.110-5637 with the observations of the Parkes 64 m radio telescope at 1369 *** observations revealed that the trailing component of the pulse profile has obvious subpulse drifting,while the leading component has no subpulse *** the two-dimensional fluctuation spectrum(2DFs),we detected three distinct emission modes in the trailing component(modes A,B and c).The emission in mode A is chaotic and indistinguishable,while modes B and c have obvious subpulse *** vertical modulation periods P3of modes B and c are around the mean values of 12 P and 8 P,*** subpulse drifting of PsR j.110-5637 will expand the pulsar sample with multiple subpulse drifting rates,and this will help future systematic.s.udies on the physical origin of the subpulse drifting phenomenon.

关键词： (stars:)pulsars general-(stars:)pulsars individual(PsR j.110-5637)-stars

The Lobster Eye Imager for Astronomy Onboard the sATech-01 satellite

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Research in Astronomy and Astrophysics 2023年第9期23卷 66-78页

作者： Z.X.Ling X.j.sun c.Zhang s.L.sun G.j.n s.N.Zhang X.F.Zhang j.B.chang F.s.chen y.F.chen Z.W.cheng W.Fu y.X.han h.Li j.F.Li y.Li Z.D.Li P.R.Liu y.h.Lv X.h.Ma y.j.Tang c.B.Wang R.j.Xie y.L.Xue A.L.yan q.Zhang c.y.Bao h.B.cai h.q.cheng c.Z.cui y.F.Dai D.W.Fan h.B.hu j.W.hu M.h.huang Z.q.j.a c.c.j.n D.y.Li j.q.Li h.y.Liu M.j.Liu y.Liu h.W.Pan y.L.q.u M.sugizaki h.sun W.X.Wang y.L.Wang q.y.wu X.P.Xu y.F.Xu h.N.yang X.yang B.Zhang M.Zhang W.D.Zhang Z.Zhang D.h.zhao X.q.cong B.W.j.ang L.h.Li X.B.q.u j.N.sun D.T.su j.Wang c.wu Z.Xu X.M.yang s.K.Zhang Z.Zhang N.Zhang y.F.Zhu h.y.Ban X.Z.Bi Z.M.cai W.chen X.chen y.h.chen y.cui X.L.Duan Z.G Feng y.gao j.W.he T.he j.j.huang F.Li j.s.Li T.j.Li T.T.Li h.q.Liu L.Liu R.Liu s.Liu N.Meng q.shi A.T.sun y.M.Wang y.B.Wang h.c.wu D.X Xu y.q.yang y.yang X.s.yu K.X.Zhang y.L.Zhang y.h.Zhang y.T.Zhang h.Zhou X.c.Zhu j.s.cheng L.q.n L.Wang q.L.Wang M.Bai R.L.gao Z.j. y.R.Liu F.L.Ma y.j.shi j.su y.y.Tan j.Z.Tong h.T.Xu c.B.Xue G.F.Xue W.yuan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of Astronomy and space science University of Chinese Academy of SciencesBeijing 100049China shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology co. LTDNanjing 211106China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China science and Technology on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National space science center Chinese Academy of ScienceBeijing 100190China

The Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe mission,was succ.s.fully launched onboard the sATech-01 satellite of the chinese Academy of scienc.s.on2022 j.ly *** this paper,we introduce the design and on-ground test results of the LEIA *** stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 sq.are degrees(18.6°×18.6°)of the X-ray imager is *** optical assembly composed of 36 MPO chips is used to foc.s.incident X-ray photons,and four large-format complementary metal-oxide semiconductor(cMOs)sensors,each of size 6 cm×6 cm,are used as the focal plane *** instrument has an angular resolution of 4’-8’(in terms of FWhM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of *** detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 millicrab)with a 1000 s *** total weight of LEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 yr,operates in a sun-synchronous orbit of 500 km with an orbital period of 95 *** is paving the way for future missions by verifying in flight the technologies of both novel foc.s.ng imaging optics and cMOs sensors for X-ray observation,and by optimizing the working setups of the instrumental *** addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sourc.s.in the soft X-ray band,albeit with limited useful observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-X-rays genera

sTcF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.c.Ai L.P.An R.Aliberti q.An X.Z.Bai y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.h.Bu F.M.cai h.cai j.j.cao q.h.cao X.cao Z.cao q.chang K.T.chao D.y.chen h.chen h.X.chen j.F.chen K.chen L.L.chen P.chen s.L.chen s.M.chen s.chen s.P.chen W.chen X.chen X.F.chen X.R.chen y.chen y.q.chen h.y.cheng j.cheng s.cheng T.G.cheng j.P.Dai L.y.Dai X.c.Dai D.Dedovich A.Denig I.Denisenko j.M.Dias D.Z.Ding L.y.Dong W.h.Dong V.Druzhinin D.s.Du y.j.Du Z.G.Du L.M.Duan D.Epifanov y.L.Fan s.s.Fang Z.j.Fang G.Fedotovich c.q.Feng X.Feng y.T.Feng j.L.Fu j.gao y.N.gao P.s.Ge c.q.Geng L.s.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl j.L.Gu A.Guevara L.c.Gui A.q.Guo F.K.Guo j.c.Guo j.Guo y.P.Guo Z.h.Guo A.Guskov K.L.han L.han M.han X.q.hao j.B.he s.q.he X.G.he y.L.he Z.B.he Z.X.heng B.L.hou T.j.hou y.R.hou c.y.h. h.M.hu K.hu R.j.hu W.h.hu X.h.hu y.c.hu j.hua G.s.huang j.s.huang M.huang q.y.h.ang W.q.huang X.T.huang X.j.huang y.B.huang y.s.huang N.hüsken V.Ivanov q.P.j. j.j.j.a s.j.a Z.K.j.a h.B.j.ang j.j.ang s.Z.j.ang j.B.j.ao Z.j.ao h.j.j.ng X.L.Kang X.s.Kang B.c.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev c.h.Li c.Li D.y.Li F.Li G.Li G.Li h.B.Li h.Li h.N.Li h.j.Li h.L.Li j.M.Li j.Li L.Li L.Li L.y.Li N.Li P.R.Li R.h.Li s.Li T.Li W.j.Li X.Li X.h.Li X.q.Li X.h.Li y.Li y.y.Li Z.j.Li h.Liang j.h.Liang y.T.Liang G.R.Liao L.Z.Liao y.Liao c.X.Lin D.X.Lin X.s.Lin B.j.Liu c.W.Liu D.Liu F.Liu G.M.Liu h.B.Liu j.Liu j.j.Liu j.B.Liu K.Liu K.y.Liu K.Liu L.Liu q.Liu s.B.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu Z.q.Liu Z.y.Liu Z.W.Liu I.Logashenko y.Long c.G.Lu j.X.Lu N.Lu q.F.Lü y.Lu y.Lu Z.Lu P.Lukin F.j.Luo T.Luo X.F.Luo y.h.Luo h.j.Lyu X.R.Lyu j.P.Ma P.Ma y.Ma y.M.Ma F.Maas s.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev y.Nefedov s.L.Olsen q.Ouyang P.Pakhlov G.Pakhlova X.Pan y.Pan E.Passemar y.P.Pei h.P.Peng L.Peng X.y.Peng X.j.Peng K.Peters s.Pivovarov E.Pyata B.B.q. y.q.q. W.B.q.an y.q.an c.F.q.ao j.j.q.n j.j.q.n L.q.q.n X.s.q.n T.L.q.u j.Rademacker c.F.Redmer h.y.sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia c.s.Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom central china Normal University Wuhan 430079China central south University Changsha 410083China china University of Geosciences Wuhan 430074China china University of Mining and Technology Xuzhou 221116China École Polytechniq.e Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China hangzhou Institute for Advanced study UCASHangzhou 310024China hebei Normal University Shijiazhuang 050024China hebei University Baoding 071002China hefei University of Technology Hefei 230601China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China high Energy Physics center Chung-Ang UniversitySeoul 06974Korea higher school of Economy 11 Pokrovsky Bulvar Moscow 109028Russia huangshan University Huangshan 245000China hubei University of Automotive Technology Shiyan 442002China hunan Normal University Changsha 410081China hunan University of science and Technology Xiangtan 411201China hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced science Facilities Shenzhen 518107China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China j.lin University Changch

The superτ-charm facility(sTcF)is an electron–positron collider proposed by the chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** sTcF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPcII,providing a uniq.e platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the standard *** sTcF proj.ct in china is under development with an extensive R&D *** document presents the physics opportunities at the sTcF,describes conceptual designs of the sTcF detector system,and disc.s.es future plans for detector R&D and physics c.s. studies.

关键词： electron–positron collider tau-charm region high luminosity sTcF detector conceptual design

Investigation of negative-parity states in ^(16)c via deuteron inelastic.s.attering

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chinese Physics c 2022年第5期46卷 70-76页

作者： Z.W.Tan j.L.Lou y.L.ye y.Liu D.y.Pang c.X.yuan j.G.Li W.Liu y.j.ang B.yang L.c.Tao K.Ma Z.h.Li q.T.Li X.F.yang j.y.Xu h.Z.yu j.X.han s.W.Bai s.W.huang G.Li h.y.wu h.L.Zang j.Feng j.s.Wang y.y.yang P.Ma q.hu Z.Bai Z.h.gao F.F.Duan L.y.h. j.h.Tan s.q.sun y.s.song h.j.Ong D.T.Tran h.y.Zhu B.L.Xia school of Physics and state Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China school of Physics Beijing Key Laboratory of Advanced Nuclear Materials and PhysicsBeihang UniversityBeijing 100191China sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Fundamental science on Nuclear safety and simulation Technology Laboratory Harbin Engineering UniversityHarbin 150001China Research center for Nuclear Physics Osaka universityOsaka 567-0047Japan Institute of Physics Vietnam Academy of Science and TechnologyHanoi 10000Vietnam Institute of Materials China Academy of Engineering PhysicsMianyang 621907China

Two low-lying unbound states in ^(16)c are investigated by deuteron inelastic.s.attering in inverse *** the 2^(-) state at 5.45 MeV previously measured in a 1n knockout reaction,a new resonant state at 6.89 MeV is observed for the first *** inelastic.s.attering angular distributions of these two states are well reproduced by the distorted-wave Born approximation(DWBA)calculation with an l=1 *** addition,the spinparities of the unbound states are disc.s.ed and tentatively assigned based on shell model calculations using the modified ysOX interaction.

关键词： negative-parity states inelastic.s.attering ^(16)c

The design and performance of charged particle detector onboard the GEcAM mission

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Radiation Detection Technology and Methods 2022年第1期6卷 53-62页

作者： y.B.Xu X.q.Li X.L.sun s.yang h.Wang W.X.Peng X.h.Liang K.Gong y.q.Liu D.y.Guo X.y.zhao c.y.Li Z.h.An j.j.he X.j.Liu X.y.Wen s.L.Xiong Fan Zhang D.L.Zhang c.y.Zhang c.cai Z.chang G.chen c.chen y.y.Du M.gao R.gao D.j.hou y.G.Li G.Li L.Li X.F.Li M.s.Li F.j.Lu h.Lu B.Meng F.shi j.Z.Wang y.s.Wang h.Z.Wang X.Wen s.Xiao y.P.Xu j.W.yang q.B.yi s.N.Zhang c.M.Zhang F.Zhang y.zhao X.Zhou Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Background The Gravitational wave highly energetic Electromagnetic counterpart All-sky Monitor(GEcAM)is dedicated to detecting gravitational wave gamma-ray *** is capable of all-sky monitoring over and discovering gamma-ray bursts and new radiation *** consists of two microsatellites,each eq.ipped with 8 charged particle detectors(cPDs)and 25 gamma-ray detectors(GRDs).Purpose The cPD is used to measure charged particles in the space environment,monitor energy and flow intensity changes,and identify between gamma-ray bursts and space charged particle events in conj.nction with *** cPD uses plastic.s.intillator as the sensitive material for detection,silicon photomultiplier array as the optically readable device,and the inlaid Am-241 radioactive source as the onboard calibration *** In this paper,we will present the working principle,physical design,functional implementation and preliminary performance test results of the *** a result,the energy range of electron,gamma-ray detection efficiency and dead time are tested to be better than the indexes req.ired through the ground calibration experiment.

关键词： GEcAM cPD siPM

The data acq.isition algorithm designed for the siPM-based detectors of GEcAM satellite

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Radiation Detection Technology and Methods 2022年第1期6卷 70-77页

作者： y.q.Liu K.Gong X.q.Li X.y.Wen Z.h.An 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 F.j.Lu h.Lu B.Meng W.X.Peng F.shi X.L.sun 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.yang j.W.yang q.B.yi Fan Zhang D.L.Zhang s.N.Zhang c.y.Zhang c.M.Zhang Fei Zhang X.y.zhao y.zhao X.Zhou Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese Academy of sciences Chinese Academy of SciencesBeijing 100049China Physics and space science college China West Normal UniversityNanchong 637002China

Background The Gravitational Wave high-energy Electromagnetic counterpart All-sky Monitor(GEcAM)consists of 2 microsatellites,each of which contains 25 GRD(LaBr3)detectors and 8 cPD(plastic.s.intillator)*** silicon photomultiplier(siPM)array is used to read each *** output signal of these detectors with siPM array is very special and challenging to *** this study,a novel data acq.isition(DAq.algorithm for these detectors is designed and implemented,and the content of the output event packet is *** and conclusion The performanc.s.including the event acq.isition efficiency of this DAq.algorithm,are extensively verified through experimental *** the on-ground and in-flight tests,this algorithm has excellent performance despite the very limited resourc.s.and short development time of GEcAM mission.

关键词： silicon photomultiplier Digital waveform proc.s.ing Data acq.isition