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journal of Materials Science & Technology 2018年第4期34卷 713-719页

作者： j.Zhang j.y.liu T.P.Wang School of Materials Science and Engineering Harbin Institute of Technology

Porous Si3N4 was brazed to Invar alloy in this study, and Ag-Cu-Ti/Cu/Ag-Cu multi-layered filler was designed to inhibit the formation of Fe2Ti and Ni3Ti intermetallic compounds. The effects of the brazing temperature and the thickness of Cu interlayer on the microstructure and mechanical properties of brazed joints were investigated. The typical microstructure of the joint brazed with multi-layered filler was porous Si3N4/TiN ＋ Ti5Si3/Ag-Cu eutectic[Cu[Ag-Cu eutectic/Cu-rich layer ＋ diffusion layer/Invar. When the brazing temperature increased, the reaction layer at the ceramic/filler interface grew thicker and the Cu interlayer turned thinner. As the thickness of Cu interlayer increased from 50 to 150 μm, the joint strength first increased and then decreased. In this research, the maximum shear strength （73 MPa） was obtained when being brazed at 1173 K with a 100 μm Cu interlayer applied in the filler, which was 55% higher than that brazed with single Ag-Cu-Ti brazing alloy and had reached 86% of the ceramic. The release of residual stress and the barrier effect of Cu interlayer to inhibit the formation of Fe2Ti and Ni3Ti intermetallics played the major role in the improvement of joint strength.

关键词： Porous Si3N4 Invar alloy Brazing Microstructure Mechanical properties

ON A NEW GENUS AND TWO NEW SPECIES OF SOLENOCERID SHRIMPS(CRUSTACEA,PENAEOIDES)FROM SOUTH CHINA SEA

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Chinese journal of Oceanology and Limnology 1983年第2期1卷 171-176页

作者： liu Ruiyu j.y.liu (Institute of Oceanology,Academia Sinica)Zhong Zhenru (South China Sea Institute of Fisheries) 1. Institute of Oceanology Academia Sinica Qingdao China2. South China Sea Institute of Fisheries China

In the course of studying Chinese Penaeoid fauna,the authors have found two newspecies of Solenocerid shrimps from the northern part of the South China *** ofthem is named Hadropenaeus spinicaudatus ***.,and the other belongs to a new genus,Crassipenaeus *** established to accommodate it——*** *** thepresent paper descriptions of the new genus and species are *** type materials are deposited in the South China Sea Institute of Fisheries(Guang-

关键词： ON A NEW GENUS AND TWO NEW SPECIES OF SOLENOCERID SHRIMPS than view

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台湾M≥6．0地震前的地震—电离层信号

地震科技情报 2001年第4期 56-58页

作者： j.y.liu 王俊国

本文了1994－1999年期间中坜电离层探测站（25．0°N，121.1°N）记录下的M＞6地震前foF2电离内层最大等离子体频率的变化，为了寻找震前的地震－电离层信号（前兆），利用15天的移动中值和关的四分位的间距作为参数和上界或下界，监则f... 详细信息

本文了1994－1999年期间中坜电离层探测站（25．0°N，121.1°N）记录下的M＞6地震前foF2电离内层最大等离子体频率的变化，为了寻找震前的地震－电离层信号（前兆），利用15天的移动中值和关的四分位的间距作为参数和上界或下界，监则foF2电离层的变化。前兆现象出现在这些地震震前的1－6天－记录的foF2值在大约120＝1700LT时下降到相关的下降之下，1999年9月20日UT（台湾当地时间9月21），台湾中部集集小镇附近发生了一次Mw=7.7的大地震，我们分析了foF2，并发现在集集地震前的第一天，第三天和第四有三个清楚的前兆。

关键词：台湾电离层信号地震前兆集集地震

Cloning and characterization of thioredoxin peroxidases from Trichinella spiralis

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Cloning and characterization of thioredoxin peroxidases from...

Geometrical reconstruction of fluorescence events observed by the LHAASO experiment

中国畜牧兽医学会兽医公共卫生学分会第五次学术研讨会

作者： N.Z.Zhang j.y.liu W.H.Li L.Li Z.G.Qu T.T.Li j.M.Cui y.yang W.Z.jia B.Q.Fu State Key Laboratory of Veterinary Etiological Biology Key Laboratory of Veterinary Parasitology of Gansu ProvinceLanzhou Veterinary Research InstituteChinese Academy of Agricultural Sciences jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Disease

The intracellular parasitic nematode,Trichinella spiralis,can initiate a high level of oxidative stress,especially during rapid growth and generative propagation *** peroxidases(TPXs) protect helminths against oxidative stress,but none has been identified in ***,3 members of the TPX family were cloned from *** muscle larvae(ML).Gene fragments for cloning recombinant Ts TPXs were amplified by PCR using the respective specific primers:Ts TPX1,5’-ggcccatggct ATGTTACCGCAAGTGCTCTT-3’(forward) and5’-ggcctcgag ACCATGCAACACCAACTGCA-3’(reverse),containing Nco I and Xho I restriction sites(italic);Ts TPX2,5’-ggcgaattc ATGAGCGTGCAACTTCAATT-3’(forward) and5’-ggcctcgag ATCAGAAACCAACTGTACGA-3’(reverse),containing Eco R I and Xho I restriction sites(italic);Ts TPX3,5’-ggcgaattc ATGAACCGCCAACTTCGCGT-3’(forward) and5’-ggcctcgag CAGTGCAACAACAGAGGTCA-3’(reverse),containing Eco R I and Xho I restriction sites(italic).The sequences of Ts TPXs were then analyzed by bioinformatics *** ORFs of Ts TPXs were 747 bp,588 bp and 594 bp in length,and encoded proteins comprising248,195 and 197 amino acids,*** deduced proteins were predicted to contain Ahp C-TSA and 1-cys Prx *** N-glycosylation sites were found in each Ts *** TPX1 contained 2 tyrosine kinase(192SVND and 201SVDE) and 3 protein kinase C(72SRK,139 TPR and 232TIK) phosphorylation *** TPX2 had 2 tyrosine kinase(76TDSE and115SVFD) and 4 protein kinase C(58SDR,88 TPR,107 THK and 181TIR) phosphorylation *** TPX3 contained 1 tyrosine kinase(76TDSE) and 1 protein kinase C(58SDR) phosphorylation ***,q RT-PCR data showed that Ts TPX genes were expressed in all three developmental stages of *** Ts TPX2 and Ts TPX3 genes were up-regulated in day 3adults(Ad3) compared with newborn larvae(NBL) and ML(P yotic expression,the re

关键词： Trichinella spiralis Thioredoxin peroxidases antioxidant activity stage expression

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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.Bastieri 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.Fan y.Z.Fan Z.X.Fan j.Fang j.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.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.liu C.liu D.liu H.liu H.D.liu j.liu j.L.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.Masood W.Mitthumsiri T.Montaruli y.C.Nan B.y..Pang P.Pattarakijwanich Z.y.Pei M.y.Qi D.Ruffolo V.Rulev A.Saiz L.Shao O.Shchegolev X.D.Sheng j.R.Shi 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&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduSichuanChina State Key Laboratory of Paricle Detection and Electronics China University of Science and Technology of China HefeiAnhui 230026China Department of Engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Physics Peking UniversityBeijing 100871China Center for Astrophysics Guangzhou UniversityGuangzhouGuangdong 510006China School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China School of Physical Science and Technology Guangxi UniversityNanningGuangxi 530004China Hebei Normal University ShijiazhuangHebei 050024China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China School of Astronomy and Space Science Nanjing UniversityNanjingJiangsu 210023China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdaoShandong 266237China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China School of Physical Science and Technology Southwest Jiaotong UniversityChengduSichuan 610031China College of Physics Sichuan UniversityChengduSichuan 610065China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasaTibet 850000China School of physics and technology Wuhan UniversityWuhanHubei 430072Ch

The LHAASO-WFCTA experiment,which aims to observe cosmic rays in the sub-EeV range using the fluorescence technique,uses a new generation of high-performance *** ensure that the experiment has ex-cellent detection capability associated with the measurement of the energy spectrum,the primary composition of cosmic rays,and so on,an accurate geometrical reconstruction of air-shower events is *** paper de-scribes the development and testing of geometrical reconstruction for stereo viewed events using the WFCTA(Wide Field of view Cherenkov/Fluorescence Telescope Array)*** approaches,which take full advantage ofthe WFCTA *** *** 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 fired *** results show that both methods have good geometrical resolution:the resolution of the stereo-timing method is slightly better than the stereo-angular method because the resolution of the latter is slightly limited by the shower track length.

关键词： cosmic ray fluorescence telescope stereo observation geometrical reconstruction

Observation of the Crab Nebula with LHAASO-KM2A−a performance study

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Chinese Physics 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.Bastieri 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.Kuleshov 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.Masood W.Mitthumsiri T.Montaruli y.C.Nan B.y.Pang P.Pattarakijwanich Z.y.Pei M.y.Qi D.Ruffolo V.Rulev A.Sáiz L.Shao O.Shchegolev X.D.Sheng j.R.Shi 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 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.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.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 Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University of Chinese Academy of Sciences 100049 BeijingChina TIANFU Cosmic Ray Research Center ChengduSichuanChina State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China 230026 HefeiAnhuiChina Department of Engineering Physics Tsinghua University100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National Space Science Center Chinese Academy of Sciences100190 BeijingChina School of Physics Peking University100871 BeijingChina Center for Astrophysics Guangzhou University510006 GuangzhouGuangdongChina School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen University519000 ZhuhaiGuangdongChina School of Physical Science and Technology Guangxi University530004 NanningGuangxiChina Hebei Normal University 050024 ShijiazhuangHebeiChina School of Physics and Microelectronics Zhengzhou University450001 ZhengzhouHenanChina School of Astronomy and Space Science Nanjing University210023 NanjingJiangsuChina Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Institute of Frontier and Interdisciplinary Science Shandong University266237 QingdaoShandongChina Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong University610031 ChengduSichuanChina College of Physics Sichuan University610065 ChengduSichuanChina Key Laboratory of Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina School of Physics and Tec

A sub-array of the Large High Altitude Air Shower Observatory(LHAASO),KM2A is mainly designed to observe a large fraction of the northern sky to hunt for γ-ray sources at energies above 10 *** though the detector construction is still underway,half of the KM2A array has been operating stably since the end of *** this paper,we present the KM2A data analysis pipeline and the first observation of the Crab Nebula,a standard candle in very high energy γ-ray *** detect γ-ray signals from the Crab Nebula in both energy ranges of 10-100 TeV and>100 TeV with high significance,by analyzing the KM2A data of 136 live days between December 2019 and May *** the observations,we test the detector performance,including angular resolution,pointing accuracy and cosmic-ray background rejection *** energy spectrum of the Crab Nebula in the energy range 10-250 TeV fits well with a single power-law function dN/dE=(1.13±0.05stat±0.08sys)×10^(-14).(E/20 TeV)-309±0.06stat±0.02syscm^(-2) s^(-1) TeV^(-1).It is consistent with previous measurements by other *** opens a new window of γ-ray astronomy above 0.1 PeV through which new ultrahigh-energy γ-ray phenomena,such as cosmic PeVatrons,might be discovered.

关键词： γ-ray Crab Nebula extensive air showers cosmic rays

胶州湾大型无脊椎动物数量的多年变化与趋势预测

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海洋与湖沼 2001年第3期32卷 274-279页

作者：刘瑞玉黄勃徐凤山李笑红中国科学院海洋研究所青岛266071

利用 1 981、1 985、1 989、1 993年 5月和 8月的定点拖网资料 ,选出大型无脊椎动物主要种 ,研究其多年变化规律 ,并预测其变化趋势。统计结果表明 ,各年 5月份的平均捕获量分别为 :1 981年 1 2 52、1 985年 1 480、1 989年 1 0 76、1 ... 详细信息

利用 1 981、1 985、1 989、1 993年 5月和 8月的定点拖网资料 ,选出大型无脊椎动物主要种 ,研究其多年变化规律 ,并预测其变化趋势。统计结果表明 ,各年 5月份的平均捕获量分别为 :1 981年 1 2 52、1 985年 1 480、1 989年 1 0 76、1 993年 556个 /(网·时 ) ,呈明显的指数下降趋势 ,这种趋势符合X =- 42 75.2 4 4e- 0 .430 2 0 66t+ 552 7.2 4 4的规律 ;每年 8月份的资源量分别为 :1 981年 31 90、1 985年 8474、1 989年 2 0 2 7、1 993年 631个 /(网·时 ) ,亦呈明显的下降 ,符合X =- 1 1 2 66.9e- 1 .2 0 2 1 98t+ 1 44 56.9的规律。以上变化趋势表明 ,若不采取有关措施 ,资源将近枯竭。

关键词：无脊椎动物数量变动数学模型趋势预测胶州湾捕获量捕捞强度

The low latitude ionospheric effects of the April 2000 magnetic storm near the longitude 120°E

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The low latitude ionospheric effects of the April 2000 magne...

Study of BESIII trigger efficiencies with the 2018 j/ψ data

中国科学院地质与地球物理研究所2004学术年会

作者： Libo liu~1,Weixing Wan~1,C.C.Lee~2,Baiqi Ning~1,and j.y.liu~2 1 Institute of Geology and Geophysics,CAS,Beijing,100029,China 2 Institute of Space Science,National Central University,Chung-Li 320,Taiwan

In this paper,we report the responses of the low latitude ionosphere near the longitude 120°E to the April 2000 geomagnetic storm using Digisonde data measured at Chungli(25.0°N,121.2°E,Mag.13.8°N),Wuhan(30.6°N, 114.4°E,Mag.19.3°N),and Kokubunji(35.7°N,139.5°E,Mag.25.7°N).At these three stations,the significant ionospheric responses are near-simultaneous height disturbances after the sudden storm commencement(SSC) on April 6,2000 and wave-like disturbances in the daytime on April *** ionospheric height disturbances in the nighttime after the SSC at these stations are suggested to be caused by the storm related perturbed electric fields, and the followed wave-like disturbances may be caused by storm induced atmospheric gravity *** vertical effective winds derived from Digisonde measurements imply the existence of significantly large vertical drifts during this storm,which are in agreement with the perturbed zonal electric fields predicted by the model of Fejer and Scherliess(1997) and Scherliess and Fejer(1997).Finally,the storm time derivations of foF2 from its monthly median level at these stations are used to validate the predication ability of the empirical model of Araujo-Pradere et al.(2002),which has included in the International Reference Ionosphere model IRI2000.

关键词： Geomagnetic storm ionospheric storm F-layer low latitude perturbed electric field International Reference Ionosphere

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Chinese Physics C 2021年第2期45卷 48-55页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.H.Bai y.Bai O.Bakina R.Baldini Ferroli I.Balossino y.Ban K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi j.Bloms A.Bortone I.Boyko R.A.Briere H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin j.F.Chang W.L.Chang G.Chelkov D.y.Chen G.Chen H.S.Chen M.L.Chen S.j.Chen X.R.Chen y.B.Chen Z.j Chen W.S.Cheng G.Cibinetto F.Cossio X.F.Cui H.L.Dai X.C.Dai A.Dbeyssi R.E.de Boer D.Dedovich Z.y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori y.Ding C.Dong j.Dong L.y.Dong M.y.Dong X.Dong S.X.Du y.L.Fan j.Fang S.S.Fang y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng j.H.Feng M.Fritsch C.D.Fu y.Gao y.Gao y.Gao y.G.Gao I.Garzia P.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco L.M.Gu M.H.Gu S.Gu y.T.Gu C.y Guan A.Q.Guo L.B.Guo R.P.Guo y.P.Guo A.Guskov T.T.Han W.y.Han X.Q.Hao F.A.Harris H Hüsken K.L.He F.H.Heinsius C.H.Heinz T.Held y.K.Heng C.Herold M.Himmelreich T.Holtmann y.R.Hou Z.L.Hou H.M.Hu j.F.Hu T.Hu y.Hu G.S.Huang L.Q.Huang X.T.Huang y.P.Huang Z.Huang T.Hussain W.Ikegami Andersson W.Imoehl M.Irshad S.jaeger S.janchiv Q.ji Q.P.ji X.B.ji X.L.ji H.B.jiang X.S.jiang j.B.jiao Z.jiao S.jin y.jin T.johansson N.Kalantar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.G.Kurth W.Kühn j.j.Lane j.S.Lange P.Larin A.Lavania L.Lavezzi Z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.Li H.B.Li H.j.Li j.L.Li j.Q.Li j.S.Li Ke Li L.K.Li Lei Li P.R.Li S.y.Li W.D.Li W.G.Li X.H.Li X.L.Li Z.y.Li H.Liang H.Liang H.Liang y.F.Liang y.T.Liang L.Z.Liao j.Libby C.X.Lin B.j.liu C.X.liu D.liu F.H.liu Fang liu Feng liu H.B.liu H.M.liu Huanhuan liu Huihui liu j.B.liu j.L.liu j.y.liu K.liu K.y.liu Ke liu L.liu M.H.liu P.L.liu Q.liu Q.liu S.B.liu Shuai liu T.liu W.M.liu X.liu y.liu y.B.liu Z.A.liu Z.Q.liu X.C.Lou F.X.Lu H.j.Lu j.D.Lu j.G.Lu X.L.Lu y.Lu y.P.Lu C.L.Luo M.X.Luo b P.W.Luo T.Luo X.L.Luo S Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced Science and Technology Beijing 100190China COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China GIBudker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and Technology Luoyang 471003China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA (A)INFN Laboratori Nazionali di Frascati I-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly (A)INFN Sezione di Ferrara I-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Ave54BUlaanbaatar 13330Mongolia jilin University Changchun 130012China johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen IIPhysikalisches InstitutHeinrich-Buff-Ring 16D-35392GiessenGermany KVI-CART University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning Normal Unive

Using a dedicated data sample taken in 2018 on the j/ψpeak,we perform a detailed study of the trigger efficiencies of the BESIII *** efficiencies are determined from three representative physics processes,namely Bhabha scattering,dimuon production and generic hadronic events with charged *** combined efficiency of all active triggers approaches 100%in most cases,with uncertainties small enough not to affect most physics analyses.

关键词： BESIII trigger efficiency Bhabha dimuon hadronic events

Measurements of the center-of-mass energies of e^(+)e^(-)collisions at BESIII

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Chinese Physics C 2021年第10期45卷 7-15页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.H.Bai y.Bai O.Bakina R.Baldini Ferroli I.Balossino y.Ban K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi j.Bloms A.Bortone I.Boyko R.A.Briere H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin j.F.Chang W.L.Chang G.Chelkov D.y.Chen G.Chen H.S.Chen M.L.Chen S.j.Chen X.R.Chen y.B.Chen Z.j.Chen W.S.Cheng G.Cibinetto F.Cossio X.F.Cui H.L.Dai X.C.Dai A.Dbeyssi R.E.de Boer D.Dedovich Z.y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori y.Ding C.Dong j.Dong L.y.Dong M.y.Dong X.Dong S.X.Du y.L.Fan j.Fang S.S.Fang y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng j.H.Feng M.Fritsch C.D.Fu y.Gao y.Gao y.Gao y.G.Gao I.Garzia P.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco L.M.Gu M.H.Gu y.T.Gu C.y Guan A.Q.Guo L.B.Guo R.P.Guo y.P.Guo A.Guskov T.T.Han W.y.Han X.Q.Hao F.A.Harris K.L.He F.H.Heinsius C.H.Heinz T.Held y.K.Heng C.Herold M.Himmelreich T.Holtmann G.y.Hou y.R.Hou Z.L.Hou H.M.Hu j.F.Hu T.Hu y.Hu G.S.Huang L.Q.Huang X.T.Huang y.P.Huang Z.Huang T.Hussain N Husken W.Ikegami Andersson W.Imoehl M.Irshad S.jaeger S.janchiv Q.ji Q.P.ji X.B.ji X.L.ji y.y.ji H.B.jiang X.S.jiang j.B.jiao Z.jiao S.jin y.jin M.Q.jing T.johansson N.Kalantar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.G.Kurth W.Kuhn j.j.Lane j.S.Lange P.Larin A.Lavania L.Lavezzi Z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.Li H.B.Li H.j.Li j.L.Li j.Q.Li j.S.Li Ke Li L.K.Li Lei Li P.R.Li S.y.Li W.D.Li W.G.Li X.H.Li X.L.Li Xiaoyu Li Z.y.Li H.Liang H.Liang H.Liang y.F.Liang y.T.Liang G.R.Liao L. Z. Liao j.Libby C.X.Lin B.j.liu C.X.liu D.liu F.H.liu Fang liu Feng liu H.B.liu H.M.liu Huanhuan liu Huihui liu j.B.liu j.L.liu j.y.liu K.liu K.y.liu L.liu M.H.liu P.L.liu Q.liu Q.liu S.B.liu Shuai liu T.liu W.M.liu X.liu y.liu y.B.liu Z.A.liu Z.Q.liu X.C.Lou F.X.Lu H.j.Lu j.D.Lu j.G.Lu X.L.Lu y.Lu y.P.Lu C.L.Luo Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced Science and Technology Beijing 100190China COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and Technology Luoyang 471003China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly 25Institute of Modern PhysicsLanzhou 730000China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia jilin University Changchun 130012China johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen II.Physikali

During the 2016-17 and 2018-19 running periods,the BESIII experiment collected 7.5 fb of e^(+)e^(-)collision data at center-of-mass energies ranging from 4.13 to 4.44 *** data samples are primarily used for the study of excited charmonium and charmoniumlike *** analyzing the di-muon process e^(+)e^(-)→(γISR=FSR)μ^(+)μ^(-),we measure the center-of-mass energies of the data samples with a precision of 0.6 *** a run-by-run study,we find that the center-of-mass energies were stable throughout most of the data-collection period.

关键词： center-of-mass energy e^(+)e^(-) annihilation BESIII