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Ef.ect of.post-bond heat treatment on the microstructure and high temperature mechanical property of.a TlP bonded γ'-strengthened co-based single crystal superalloy

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journal of.materials s.ience & Technology 2021年第21期80卷 244-258页

作者： s.Y.wang Y.sun c.Y.cui X.f.sun Y.Z Zhou Y.m.ma H.l.An ins.itute of.metal Research Chinese Academy of SciencesShenyang 110016China school of.materials s.ience and Engineering University of Science and Technology of ChinaHefei 230026China Harbin welding ins.itute China Academy of Machinery Science and TechnologyHarbin 150028China

Post-bond heat treatment(PBHT) applied to a transient liquid phase(TlP) bonding joint is an ef.ective approach to remove the brittle borides and improve its ***,we proposed two types of.PBHT strategies to obtain a TlP bonded γ'-strengthened co-based single crystal superalloy,and the microstructural characteris.ics and tensile properties of.the two heat treated joints were c.m.ared to identif. the optimal PBHT *** evolution of.the brittle boride in the joint af.er the PBHT was studied by using in-situ *** experimental results allowed to provide a theoretic.m.del to quantitatively evaluate the distribution of.the brittle phase af.er the optimal PBHT and analyze the joint f.actures to understand the f.ilure *** obtained results revealed that a post-bond solid solution treatment perf.rmed to the joint at a high temperature(over 1275℃) could decrease the area f.action of.the boride f.om 7.2 % to 1.4 % and increase the elongation f.om 1.9 % to 7.8 %.This work emphasizes the relevance of.solid solution temperature when a PBHT strategy is applied.

关键词： Transient liquid phase(TlP) γ'-strengthened co-based single crystal superalloy Heat treatment sequence Brittle boride Tensile property

Photocatalytic perf.rmance of.K2Ti6O13 whiskers to H2 evolution and cO2 photo-reduction

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journal of.Energy chemistry 2019年第10期28卷 18-28页

作者： l. f. Garay-Rodríguez l.m.Torres-martínez E.moctezuma f.cultad de ingeniería civil-Departamento de Ec.m.teriales y Energía Universidad Autónoma de Nuevo LeónAv. Universidad S/N Cd. UniversitariaC. P. 66455 San Nicolás de los GarzaNLMéxico f.cultad de ciencias Químicas Universidad Autónoma de San Luis PotosíAv. Manuel Nava#6C. P.78290 San Luis PotosíSLPMéxico

K2Ti6O13 whiskers were synthesized by conventional sol-gel method, sono-chemical as.isted and microwave as.isted sol-gel method in order to obtain catalysts with dif.erent particle sizes and to modif. their optical, textural and electrochemical properties. These modif.cations.improved their photocatalytic activity f.r H2 evolution and cO2 photo-reduction. long K2Ti6O13 whiskers prepared by ultrasound as.isted sol-gel method are the most active photocatalysts f.r the hydrogen evolution reaction using pure water as reactant (u-sG, 10,065 μmol g^-1). in contrast, an opposite behavior was observed using a mixture of.ethanol-water, where the highest activity was achieved by the shortest and less crystalline K2Ti6O13 whiskers (c-sG, 3,2871 μmol g^-1). in case of.cO2 photo-reduction, long whiskers that were also prepared by the sono-chemical as.isted sol-gel method were the most active to transf.rm cO2 to f.rmaldehyde, methane, methanol and hydrogen. The Ef. value of.this catalyst is located very close to the potential f.r f.rmaldehyde production and f.vors the selectivity to this organic product.

关键词： K2Ti6O13 sol-gel whiskers Hydrogen evolution cO2 reduction

c.m.etition between f.sion-evaporation and multif.agmentation in central collisions.in ^(58)Ni+^(48)ca at 25A meV

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Nuclear s.ience and Techniques 2013年第5期24卷 82-88页

作者： f.ANcAlANZA l ABBONDANNO u AmORiNi f.BARliNi s BiNi m BOuGAulT R BRuNO m cARDEllA G cAsiNi G AGOs.iNO m D' De f.liPPO V De sANcTis j GERAci E GiussANi A GRAmEGNA f.GuiOT B KRAVcHuK V la GuiDARA E lANZAlONE G le NEiNDRE N mAiOliNO c.m.RiNi P mORElli l Olmi A PAGANO A PAPA m PiANTElli s PiRRONE s POliTi G POGGi G PORTO f.RussOTTO P RiZZO f.VANNiNi G VANNucci l iNf. laboratori Nazionali del sud-lNs Catania 95123Italy Dipartimento di f.sica Universitàdi Catania I-95129Italy iNf. sezione di Trieste Trieste I-34127Italy Dipartimento di f.sica Universitàdi FirenzeINFN Sezione di Firenze 1-50139Italy lPc caen IN2P3-CNRS/ENSICAEN and UniversitéF-14050 Caen cedex 5-140France Dipartimento di f.sica Universitàdi Bologna and INFN Sezione di Bologna 4-50121Italy iNf. sezione di catania i-95129 Italy iNf. sezione di f.renze i-50139 Italy Dipartimento di f.sica Universitàdi Milano and INFN Sezione di Milano1-20126Italy iNf. laboratori Nazionali di legnaro 1-35020 Italy centro siciliano di f.sica Nucleare e struttura della materia Catania 1-95129Italy universitàKore Enna 1-94100Italy

The experimental data concerning the58Ni+48ca reaction at Elab(Ni)=25A meV,collected by using the cHimERA 4π device,have been analyzed in order to inves.igate the c.m.etition among dif.erent reaction mechanisms f.r central collisions.in the f.rmi energy *** a main criterion f.r centrality selection we have chosen the f.ow angle(f.ow) method,making an event-by-event analysis that considers the shape of.events,as.it is determined by the eigenvectors of.the experimental kinetic-energy *** the selected central events(f.ow >60°) some global variables,good to characterize the pattern of.central collisions have been *** main f.atures of.the reaction products were explored by using dif.erent constraints on some of.the relevant observables,like mass and velocity distributions and their *** emphasis was devoted,f.r central collisions,to the c.m.etition between f.sion-evaporation processes with subsequent identif.cation of.a heavy residue and a pos.ible multif.agmentation mechanism of.a well def.ned(if.any) transient nuclear *** evolution of.the system and pre-equilibrium emis.ion were taken into account by simulating the reactions.in the f.amework of.transport *** approaches have been envisaged(dynamical stochas.ic BNV cal.ulations + sequential simON code,QmD,c.m.,etc.).Preliminary c.m.arison of.the experimental data with BNV cal.ulations shows reasonable agreement with the assumption of.sequential multif.agmentation emis.ion in the mass region of.imf. close to the heavy *** deviations f.om sequential processes were f.und f.r those imf.0}n the region of.masses.intermediate between the mass of.heavy residues and the mass of.light *** simulations are in *** experimental analysis will be enriched also by inf.rmation obtained inspecting the imf.imf.correlation f.nction,in order to elucidated the nature of.space-time decay property of.the emitting source associated with events having

关键词：多重碎裂中心碰撞蒸发过程 meV 竞争熔合国际货币基金组织事件分析

Ef.ective charge f.om lattice QcD

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chinese Physics c 2020年第8期44卷 23-32页

作者： Z.-f.cui j.-l.Zhang D.Binosi f.De soto c.m.zrag j.Papavas.iliou c.D.Roberts j.Rodríguez-Quintero j.segovia s.Zaf.iropoulos school of.Physics Nanjing UniversityNanjing 210093China ins.itute f.r Nonperturbative Physics Nanjing UniversityNanjing 210093China Department of.Physics Nanjing Normal UniversityNanjing 210023China European centre f.r Theoretical studies.in Nuclear Physics and Related Areas Villa TambosiStrada delle Tabarelle 286I-38123 Villazzano(TN)Italy Dpto.sistemas f.sicos Químicos y NaturalesUniv.Pablo de OlavideE-41013 SevillaSpain 6.IRFUCEAUniversitéParis-SaclayF-91191 Gif-sur-YvetteFrance Department of.Theoretical Physics and if.c University of Valencia and CSICE-46100ValenciaSpain Department of.integrated s.iences and center f.r Advanced studies.in Physics Mathematics and Computation university of.Huelva E-21071 HuelvaSpain Aix mars.ille univ Universitéde ToulonCNRSCPTMarseilleFrance

using lattice conf.gurations f.r quantum chromodynamics(QcD)generated with three domain-wall f.rmions at a physical pion mass,we obtain a parameter-f.ee prediction of.QcD’s renormalisation-group-invariant process.independent ef.ective charge,α^(k2).Owing to the dynamical breaking of.scale invariance,evident in the emergence of.a gluon mass-scale,m0=0.43(1)GeV,this coupling saturates at inf.ared momenta:α^(0)/π=0.97(4).Amongst other things:α^(k2)is almost identical to the process-dependent(PD)ef.ective charge def.ned via the Bjorken sum rule;and also that PD charge which,employed in the one-loop evolution equations,delivers agreement between pion parton distribution f.nctions c.m.uted at the hadronic scale and *** diversity of.unif.ing roles played byα^(k^2)suggests that it is a strong candidate f.r that object which represents the interaction strength in QcD at any given momentum scale;and its properties support a conclusion that QcD is a mathematically well-def.ned quantum f.eld theory in f.ur dimensions.

关键词： running coupling quantum chromodynamics Dyson-schwinger equations lattice f.eld theory emer-gence of.mass conf.nement

THE APPARENT ViscOsiTY Of.sEmi-sOliD AZ91D AllOY AT sTEADY sTATE

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Acta metal.urgica sinica(English letters) 2002年第6期15卷 505-510页

作者： Z.s. Zhen, w.m. mao, s.j. Van, A.m. Zhao, c.l. cui and X.Y. Zhongschool of.materials s.ience and Engineering, university of.s.ience and Technology Beijing, Beijing 100083, china school of.materials s.ience and Engineering University of Science and Technology Beijing Beijing 100083China

The rheological behavior of.semi-solid AZ91D at steady state is studied usinga couette type visc.m.ter in the present paper. The results show that the apparent viscosity of.emi-solid AZ91D at the steady state increases with the solid f.action increasing, and goes upsharply when the solid f.action reaches a certain value, which is called critical f.action. inaddition, the apparent viscosity of.semi-solid AZ91D at the steady state takes on a dis.inctdowntrend with the shearing rate increasing, which indicates a strong shear thinning property. inaddition, the critical solid f.action bec.m.s higher under larger shearing rate, owing to the moreglobular shape of.the solid particles. Based on the present experiment results, an empiricalequation is built as that, relating the steady state apparent viscosity of.semi-solid AZ91D with thesolid f.action f.s and shearing rate gamma at the same time: eta_(app)=10.74 exp (6.95 f.s)gamma^(-0.86).

关键词： rheological behavior magnesium alloy semi-solid viscosity visc.m.ter

Variation of.sulf.te aerosol concentrations over the western Pacif.c and their ef.ect on cl.uds, radiation and precipitation

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Acta Oceanologica sinica 1993年第4期12卷 521-534页

作者： f.Parungo j.Rosins.i m.l.c.wu c.T.Nagamoto Air Resources laboratory NOAA/ERL Boulder CO U.S.ANational Center for Atmospheric Research Boulder CO U.S.AGoddard Space Flight Center NASA Greenbelt MD U.S.AAir Resources Laboratory NOAA/ERL Boulder CO U.S.A

under bilateral cooperation between the united states of.America and the People's Republic of.china, a series of.research cruises were conducted over the western Pacif.c Ocean. it was f.und that a) the non-sea-salt sulf.te aerosol particles are the major source of.cl.ud condensation nuclei, b) the population of.cl.uds and the total albedo are proportional to the concentration of.condensation nuclei and consequently to the concentration of.the non-sea-salt aerosol particles, and c) the amount of.rainf.ll is.inversely proportional to the concentration of.non-sea-salt sulf.te aerosol particles. it seems that anthropogenic sulf.te aerosol particles af.ect the regional planetary albedo and climate and that the contribution f.om biogenically derived sulf.te aerosol particles.is of.lesser importance.

关键词： data Variation of.sulf.te aerosol concentrations over the western Pacif.c and their ef.ect on cl.uds radiation and precipitation over

microstructure and mechanical properties of.double-side f.iction s.ir welded 6082Al.ultra-thick plates

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journal of.materials s.ience & Technology 2020年第6期41卷 105-116页

作者： c.Yang j.f.Zhang G.N.ma l.H.wu X.m.Zhang G.Z.He P.Xue D.R.Ni B.l.Xiao K.s.wang Z.Y.ma shenyang National laboratory f.r materials s.ience Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China school of.materials s.ience and Engineering University of Science and Technology of ChinaShenyang 110016China cRRc changchun Railway Vehicles co. Ltd.Changchun 130062China school of.metal.urgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China

in the present work,80 mm thick 6082Al alloy plates were successf.lly double-side welded by f.iction s.ir welding(f.w).The relations.ip between the microstructures and mechanical properties was built f.r the double-side f.w butt joint with more attention paid to the local characteris.ic *** was shown that a phenomenon of.microstructural inhomogeneity existed in the nugget zone(NZ)through the thickness *** grain size presented an obvious gradient distribution f.om the top to the bottom f.r each single-pass weld,and the microhardness values decreased f.om both surf.ces to the middle of.the *** lowest hardness zone(lHZ)exhibited a"hyperbolical"-shaped distribution extending to the middle of.the *** tensile properties were obtained in the three s.iced spec.m.ns of.the f.w joint,and the joint coef.icient reached about 70%which achieved the same level as the conventional f.w Al alloy *** element modeling proved that the"hyperbolical"-shaped heat af.ected zone(HAZ)was benef.cial to resis.ing the strain concentration in the middle layer spec.m.n which helped to increase the tensile *** on the analysis of.the hardness contour map,tensile property and microstructural evolution of.the joints,an isothermal sof.ening layer(isl)model was proposed and established,which may have a helpf.l guidance f.r the optimization on the f.w of.ultra-thick Al alloy plates.

关键词： ultra-thick aluminum alloy plates Double-side f.iction s.ir welding f.nite element model microstructural inhomogeneity mechanical properties

The lobster Eye imager f.r 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.jin s.N.Zhang X.f.Zhang j.B.chang f.s.chen Y.f.chen Z.w.cheng w.f. Y.X.Han H.li j.f.li Y.li Z.D.li P.R.l.u 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.f.n H.B.Hu j.w.Hu m.H.Huang Z.Q.jia c.c.jin D.Y.li j.Q.li H.Y.l.u m.j.l.u Y.l.u H.w.Pan Y.l.Qiu 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.jiang l.H.li X.B.Qiu 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 f.ng Y.Gao j.w.He T.He j.j.Huang f.li j.s.li T.j.li T.T.li H.Q.l.u l.l.u R.l.u s.l.u N.meng Q.s.i 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.Qin l.wang Q.l.wang m.Bai R.l.Gao Z.ji Y.R.l.u f.l.ma Y.j.s.i 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 s.ience University of Chinese Academy of SciencesBeijing 100049China shanghai ins.itute of.Technical Physics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology co. LTDNanjing 211106China ins.itute of.High Energy Physics Chinese Academy of SciencesBeijing 100049China s.ience and Technology on low-light-level Night Vision laboratory Xi'an 710065China innovation Academy f.r microsatellites Chinese Academy of SciencesShanghai 201204China ins.itute of.Electrical Engineering Chinese Academy of ScienceBeijing 100190China National space s.ience center Chinese Academy of ScienceBeijing 100190China

The lobster Eye imager f.r Astronomy(lEiA),a pathf.nder of.the wide-f.eld X-ray Telescope of.the Einstein Probe mis.ion,was successf.lly l.unched onboard the sATech-01 satellite of.the chinese Academy of.s.iences on2022 july *** this paper,we introduce the design and on-ground test results of.the lEiA *** stateof.the-art micro-Pore Optics(mPO),a wide f.eld of.view of.346 square degrees(18.6°×18.6°)of.the X-ray imager is *** optical assembly c.m.osed of.36 mPO chips.is used to f.cus.incident X-ray photons,and f.ur large-f.rmat c.m.lementary metal-oxide semiconductor(cmOs)sensors,each of.size 6 cm×6 cm,are used as the f.cal plane *** instrument has an angular resolution of.4’-8’(in terms of.f.Hm)f.r the central f.cal spot of.the point-spread f.nction,and an ef.ective area of.2-3 cm^(2) at 1 keV in essentially all the directions within the f.eld of.*** detection passband is 0.5-4 keV in sof. 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 lif.time of.2 yr,operates.in a sun-synchronous orbit of.500 km with an orbital period of.95 *** is paving the way f.r f.ture mis.ions by verif.ing in f.ight the technologies of.both novel f.cusing imaging optics and cmOs sensors f.r X-ray observation,and by optimizing the working setups of.the instrumental *** addition,lEiA is able to carry out s.ientif.c observations to f.nd new transients and to monitor known sources.in the sof. X-ray band,albeit with limited usef.l observing time available.

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

Geometrical reconstruction of.f.uorescence events observed by the lHAAsO experiment

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chinese Physics c 2021年第4期45卷 416-425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 Z.cao j.chang j.f.chang X.c.chang B.m.chen j.chen l.chen l.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 Danzengluobu D.della Volpe B.DEtorre Piazzoli X.j.Dong j.H.f.n Y.Z.f.n Z.X.f.n j.f.ng j.f.ng c.f.f.ng l.f.ng s.H.f.ng Y.l.f.ng 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.j. H.Y.jia K.jiang Z.j.jiang c.jin D.Kuleshov K.levochkin B.B.li c.li c.li f.li H.B.li H.c.li H.Y.li j.li K.li w.l.li X.li X.li X.R.li Y.li Y.Z.li Z.li Z.li E.w.liang Y.f.liang s.j.lin B.l.u c.l.u D.l.u H.l.u H.D.l.u j.l.u j.l.l.u j.l.l.u j.s.l.u j.Y.l.u m.Y.l.u R.Y.l.u s.m.l.u w.l.u Y.N.l.u Z.X.l.u w.j.long R.lu H.K.lv B.Q.ma l.l.ma X.H.ma j.R.mao A.masood w.mitthumsiri T.montaruli Y.c.Nan B.Y..Pang P.Pattarakijwanich Z.Y.Pei m.Y.Qi D.Ruf.olo V.Rulev A.s.iz l.shao O.shchegolev X.D.sheng j.R.s.i H.c.song Yu.V.stenkin V.stepanov Q.N.sun X.N.sun Z.B.sun 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 w.wang X.G.wang X.j.wang X.Y.wang Y.D.wang Y.j.wang Y.P.wang Z.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.Xing D.l.Xu R.X.Xu l.Xue D.H.Yan c.w.Yang f.f.Yang j.Y.Yang l.l.Yang m.j.Yang R.Z.Yang s.B.Yang Y.H.Yao Z.G.Yao Y.m.Ye l.Q.Yin N.Yin X.H.You Z.Y.You Y.H.Yu Q.Yuan 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.Zhang l.X.Zhang P.f.Zhang P.f.Zhang R.Zhang s.R.Zhang s.s.Zhang X.Zhang X.P.Zhang Y.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 Key laboratory of.Particle Astrophyics&Experimental Physics Division&c.m.uting center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of.chinese Academy of.s.iences Beijing 100049China TiANf. cos.ic Ray Research center ChengduSichuanChina state Key laboratory of.Paricle Detection and Electronics China university of.s.ience and Technology of.china HefeiAnhui 230026China Department of.Engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National space s.ience center Chinese Academy of SciencesBeijing 100190China school of.Physics Peking UniversityBeijing 100871China center f.r Astrophysics Guangzhou UniversityGuangzhouGuangdong 510006China school of.Physics and Astronomy&school of.Physics(Guangzhou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China school of.Physical s.ience and Technology Guangxi UniversityNanningGuangxi 530004China Hebei Normal.university ShijiazhuangHebei 050024China school of.Physics and microelectronics Zhengzhou UniversityZhengzhouHenan 450001China school of.Astronomy and space s.ience Nanjing UniversityNanjingJiangsu 210023China Key laboratory of.Dark matter and space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China ins.itute of.f.ontier and interdis.iplinary s.ience Shandong UniversityQingdaoShandong 266237China Key laboratory f.r Research in Galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao lee ins.itute&school of.Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China school of.Physical s.ience and Technology Southwest Jiaotong UniversityChengduSichuan 610031China college of.Physics Sichuan UniversityChengduSichuan 610065China Key laboratory of.cos.ic Rays(Tibet university) Ministry of EducationLhasaTibet 850000China school of.physics and technology Wuhan UniversityWuhanHubei 430072Ch

The lHAAsO-wf.TA experiment,which aims to observe cos.ic rays.in the sub-EeV range using the f.uorescence technique,uses a new generation of.high-perf.rmance *** ensure that the experiment has ex-cellent detection capability associated with the measurement of.the energy spectrum,the primary c.m.osition of.cos.ic rays,and so on,an accurate geometrical reconstruction of.air-shower events.is *** paper de-scribes the development and tes.ing of.geometrical reconstruction f.r stereo viewed events using the wf.TA(wide f.eld of.view cherenkov/f.uorescence Telescope Array)*** approaches,which take f.ll advantage of.he wf.TA *** *** is the stereo-angular method,which uses the pointing of.triggered siPms.in the shower trajectory,and the other is the stereo-timing method,which uses the triggering time of.the f.red *** results show that both methods have good geometrical resolution:the resolution of.the stereo-timing method is s.ightly better than the stereo-angular method because the resolution of.the latter is s.ightly limited by the shower track length.

关键词： cos.ic ray f.uorescence telescope stereo observation geometrical reconstruction