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Effect of Patient Age and Embryo Parameters on Pregnancy Outcomein In Vitro Fertilization-Embryo Transfer(IVF-ET)

Journal of Reproduction and Contraception 2010年第4期21卷 219-227页

作者： hong-zi du li li jian-qiao liu wen-hong zhang yu shi yu-ling huang Assisted Reproductive Department Institute of Obstetrics and Gynecology of the Third Affiliated Hospital of Guangzhou Medical College Guangzhou 510150 China

Objective To study the effect of patient age, the number and quality of embryos transferred on pregnancy outcome in in vitro fertilization-embryo transfer procedures （IVF-ETs）. Methods A retrospective study was conducted with infertile women who underwent a total of 1 800 cycles of lVF-ET and intracytoplasmic sperm injection （ICSI） at the Reproductive Medicine Center of the Third Affiliated Hospital of Guangzhou Medical College from Jan. 2006 to Dec. 2007. The patients were divided into three groups based on age （year）. 〈30, 30-34 and 235. The rates of clinical pregnancy and multiple pregnancies were compared in each group when 1-3 embryos and 0-3 goodquality embryos were transferred respectively. Results 1） In the group of patients aged 〈30 years, there was no significant difference in pregnancy outcomes with 1-3 embryos transferred. However, pregnancy rates were similar when 2 3 good-quality embryos were transferred, which was significantly higher compared with 0-1 good-quality embryos transferred; the incidence of multiple pregnancies was not an issue when only 1 embryo was transferred. 2） The pregnancy rate of the patients aged 30 34 was not significant not only when only 2-3 embryos were transferred but also when 2-3 good-quality embryos were transferred, which was significant compared with when 1 embryo or 0 1 good-quality embryo was transferred. The subgroup of 3 good-quality embryos transferred, at the same time, was expected to significantly increase multiple pregnancy rate. 3） For the patients aged 235, there were similar pregnancy rates in the subgroup involving 1-3 embryos transferred. Compared with 0-2 good-quality embryos transferred, the pregnancy rate was significantly higher in the patients with 3 good-quality embryos transferred. An increased trend toward multiple pregnancies was observed among not only the subgroups with 1-3 embryos transferred, but also when 1-3 good-quality embryos were transferred, although it was significantly higher in patien

关键词： in vitro fertilization-embryo transfer (IVF-ET) embryo transfer (ET) age pregnancy rate multiple pregnancy rate

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Stratigraphic framework and sedimentary evolution during the Cryogenian-Ediacaran transition in northeastern Sichuan Basin,South China

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Petroleum Science 2024年第2期21卷 823-835页

作者： Yi zhang hong-Wei Kuang Yong-Qing liu Qiang shi Dong-Ge Wang Ke-Ning Qi yu-Chong Wang Da-Wei qiao Xiao-Shuai Chen li-Zhi Wu Meng Tian Long Chen Yi Wei liao-yuan Song jian li zi-Gang Wu yun-Qian liu Xuan-Chun liu An-Qing Chen Zhi-Wei liao Institute of Geology Chinese Academy of Geological SciencesBeijing100037China State Key Laboratory of Coal Mine Disaster Dynamics and Control School of Resources and Safety EngineeringChongqing UniversityChongqing400044China No.205 Geological Team Chongqing Bureau of Geology and Minerals ExplorationChongqing401121China Chongqing Institute of Geological Survey Chongqing401122China Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of TechnologyChengdu610059SichuanChina

The northeastern Sichuan area in the northern Yangtze margin has unique Ediacaran geological records,especially the Doushantuo Formation(DST),and become a hot research area in recent ***,the Cryogenian-Ediacaran(C-E)boundary has not been precisely identified,which restricts the in-depth study of geological information during this crucial transitional period and is unfavorable for a systematic and complete understanding of the Yangtze Block and even the global paleogeographic *** study conducted stratigraphy,sedimentology,and chronostratigraphy to establish the stratigraphic framework and sedimentary evolution of the C-E transition strata in northeastern *** results showed that the Ediacaran sediments,without the cap dolomite,unconformably overlaid the Cryogenian sediments in the studied *** Member II of the DST,characterized by 50-160 m of red-green sandstone(approximately equivalent to the original Chengkou“Guanyinya Formation”),directly overlaid the Cryogenian sediments and displayed a 623±2.3 Ma maximum depositional age from the detrital zircon U-Pb *** stratigraphic correlations indicate that the C-E transition strata in northeastern Sichuan had a consistent lithological association and sedimentary sequence characteristics but differed from the Three ***,the upper Nantuo massive glacial diamictites transition to the icebergs rafted lonestone-bearing mudstones at the top,then change upward to DST barrier coast *** proposed DST of the northeastern Sichuan Basin was divided into three lithostratigraphic members without the regional Member I cap dolomite:(i)Member II purple-red,gray-green sandstone strata,(ii)MemberⅢblack mudstone strata,and(iii)Member IV P-Mn bearing *** the C-E transition,the study area experienced(i)the global deglaciation stage in the terminal Marinoan glaciation and(ii)the filling-leveling up stage with clastic rocks in the early ***,the early Ediacaran

关键词： Marinoan glaciation Doushantuo formation Cap dolomite Deglacial and coastal deposits Detrital zircon U-Pb dating

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The In-Flight Realtime Trigger and Localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-yun Zhao Shao-lin Xiong Xiang-Yang wen Xin-qiao li Ce Cai Shuo Xiao Qi Luo wen-Xi Peng Dong-Ya Guo Zheng-Hua An Ke Gong Jin-yuan liao Yan-Qiu zhang yue huang Lu li Xing wen Fei zhang Jing duan Chen-Wei Wang Dong-li shi Peng zhang Qi-Bin Yi Chao-Yang li Yan-Bing Xu Xiao-Hua liang Ya-Qing liu Da-li zhang Xi-Lei Sun Fan zhang Gang Chen Huan-yu Wang Sheng Yang Xiao-Jing liu Min Gao Mao-Shun li Jin-Zhou Wang Xing Zhou Yi Zhao Wang-Chen Xue Chao Zheng Jia-Cong liu Xing-Bo Han Jin-ling Qi Jia huang Ke-Ke zhang Can Chen Xiong-Tao Yang Dong-Jie Hou yu-Sa Wang Rui qiao Xiang Ma Xiao-Bo li Ping Wang Xin-Ying Song li-Ming Song shi-Jie Zheng Bing li hong-Mei zhang yue Zhu Wei Chen jian-jian He Zhen zhang Jin Hou hong-Jun Wang Yan-Chao Hao Xiang-yu Wang Zong-yuan Yang Zhi-Long wen Zhi Chang yuan-yuan du Rui Gao Xiao-Fei Lan Yan-Guo li Gang li Xu-Fang li Fang-Jun Lu hong Lu Bin Meng Feng shi Hui Wang Hui-Zhen Wang yu-Peng Xu Jia-Wei Yang Xue-Juan Yang Shuang-Nan zhang Chao-yue zhang Cheng-Mo zhang Zhi-Cheng Tang Cheng Cheng 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 School of Information Science and Technology Southwest Jiaotong UniversityChengdu 611756China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space Science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun University of Science and Technology Changchun 130022China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

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The only purple-flower species in Actaea *** pollinated by a hornet

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Journal of Plant Ecology 2024年第4期17卷 181-196页

作者： lin-Feng Qiu Jiu-Dong zhang Ying li Xiao-Ying liu Dan-Qing zhang Long huang Ya-Peng Yang shi-yu Wang yue-Yi li zi-Wei Ma Jie Sui lin Wang Xiao-Fen Che Xian-Hua Tian Yi Ren jian-Qiang zhang National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China College of Life SciencesShaanxi Normal UniversityXi’an 710119China Key Laboratory of Medicinal Plant Resource and Natural Pharmaceutical Chemistry of Ministry of Education Shaanxi Normal UniversityXi’an 710119China College of Biological and Environmental Engineering Xi’an UniversityXi’an 710065China

Examining the pollination biology of plant species is not only crucial for enhancing our understanding of their reproductive biology,but also essential for elucidating their adaptation and evolutionary ***,we investigated the breeding system and pollination biology of two closely related species in *** flower of *** is unique in the genus with purple and chartaceous(paper-like)sepals,fewer stamens with yellow anthers and purple *** three seasons of field observation and exclusion experiments,we determined that *** was primarily pollinated by a hornet species,Vespa bicolor,which also served as the most efficient *** contrast,*** was primarily pollinated by large *** purpurea exhibited a significantly higher cumulative nectar volume than ***,which could be a crucial factor in attracting ***.A control experiment further demonstrated that removing the nectar leaf(petal)significantly decreased the visiting frequency of *** system studies revealed that both species were self-compatible,yet they primarily underwent outcrossing in natural *** study presents a compelling case of possible pollinator shift in *** accompanied by morphological divergence.A more in-depth investigation of this system would offer crucial insights into the extent to which pollinators are involved in the plant speciation process and whether they contribute to reproductive isolation between closely related species.

关键词： Actaea purpurea Actaea japonica breeding system pollinator shift speciation Vespa bicolor

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CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai wenyong Cai Wujun Cai Yijian Cai Yizhou Cai yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao jianshe Cao Antoine Chance Xuejun Chang yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen yukai Chen Zelin Chen zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng yunlong Chi Pietro Chimenti wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi ling-yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

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Ultrafast optical spectroscopy evidence of pseudogap and electronphonon coupling in an iron-based superconductor KCa_(2)Fe_(4)As_(4)F_(2)

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Science China(Physics,Mechanics & Astronomy) 2022年第3期65卷 92-98页

作者： Chen zhang Qi-Yi Wu wen-Shan hong Hao liu Shuang-Xing Zhu Jiao-Jiao Song Yin-Zou Zhao Fan-Ying Wu zi-Teng liu Shu-yu liu Ya-Hua yuan Han huang Jun He shiliang li Hai-yun liu yu-Xia duan Hui-Qian Luo jian-qiao Meng School of Physics and Electronics Central South UniversityChangsha 410083China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Academy of Quantum Information Sciences Beijing 100193China

We use ultrafast optical spectroscopy to study the nonequilibrium quasiparticle relaxation dynamics of the iron-based superconductor KCa_(2)Fe_(4)A_(s4)F_(2)with T_(c)= 33.5 K. Our results reveal a possible pseudogap(△_(PG)=(2.4 ± 0.1) me V) below T*≈ 50 K but prior to the opening of a superconducting gap(△SC(0) ≈(4.3 ± 0.1) me V). Measurements under high pump fluence reveal two distinct, coherent phonon oscillations with 1.95 and 5.51 THz frequencies, respectively. The high-frequency A1 g(2) mode corresponds to the c-axis polarized vibrations of Fe As planes with a nominal electron-phonon coupling constant λA1 g(2)= 0.194 ± *** findings suggest that the pseudogap is likely a precursor of superconductivity, and the electron-phonon coupling may play an essential role in the superconducting pairing in KCa_(2)Fe_(4)A_(s4)F_(2).

关键词： KCa_(2)Fe_(4)A_(s4)F_(2) ultrafast spectroscopy electron-phonon coupling superconductivity

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Manganese carbonate stromatolites of the Ediacaran Doushantuo Formation in Chengkou,northern Yangtze Craton,China

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Journal of Palaeogeography 2021年第3期10卷 356-381页

作者： Yi zhang jian li Long Chen Yi Wei Qiang shi Dong-Ge Wang Qing-Ming Wu liao-yuan Song Meng Tian hong-Wei Kuang Yong-Qing liu Kaarel Mänd Hua-Qing Bai zi-liang liu yu-Chong Wang Da-Wei qiao wen-Jun Zhu No.205 Geological Team Chongqing Bureau of Geology and Minerals ExplorationChongqing 402160China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Department of Earth and Atmospheric Sciences University of AlbertaEdmontonAlberta T6G 2E8Canada Department of Geology University of TartuTartu 50411Estonia State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059Sichuan ProvinceChina PetroChina Xinjiang Oilfield Company Karamay 834099Xinjiang Uygur Autonomous RegionChina

The origin process of manganese ores remains unsolved *** the origins of stromatolites that contain manganese may be a key to deciphering the sedimentary environments and metallogenic processes of these ***,only a few manganese stromatolites have been discovered and described until *** are well developed in the manganese deposits,located near the top of the Ediacaran Doushantuo Formation in Chengkou area of Chongqing,northern Yangtze Craton,but has not been explicitly studied;and whether they are true stromatolites or Epiphyton microbialites remains *** on field and core observations and thin section microscopy,the characteristics of five types of manganese stromatolites and their growth modes are described in detail in this *** results show that these stromatolites grew in a biostrome in shoal and lagoon environments and were syngenetic with oncolites and oolites on a carbonate ramp behind the *** stromatolites can be categorized into three forms:(1)stratiform;(2)columnar,which includes branched and columnar types;and(3)stratiform-columnar,which is a transitional *** on a criterion that the diameter is less than or greater than 1 mm,columnar stromatolites are further divided into micro-columnar(1 mm)columns,which display synchronous growth and are similar to *** shapes are mainly controlled by water depths and hydrodynamic *** greater the water depth,the more columnar the columns tend to *** strong hydrodynamic conditions decrease the growth rate of stromatolites,and they even stopped growth due to wave ***,pillared laminar textures(not Epiphyton),which consist of dendritic,micro-branched and microcolumnar stromatolites,are a common feature of the larger stratiform,stratiform-columnar and columnar *** alternations of laminae with different internal textures record subtle fluctuations in wat

关键词： Microbialites Manganese stromatolites Ediacaran Doushantuo Formation Yangtze Craton Growth mode

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非洲猪瘟病毒阻断EliSA抗体检测方法的建立

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动物医学进展 2024年第3期45卷 42-47页

作者：林彦星翁巧玉阮周曦吴江黄超华金业陈鹏张彩虹杨俊兴曹琛福史卫军刘建利花群义深圳海关动植物检验检疫技术中心广东深圳518045 湖南普简生物科技有限公司湖南长沙410013 深圳市心月生物科技有限公司广东深圳518000

为建立一种非洲猪瘟病毒抗体阻断EliSA检测方法,以原核表达ASFV p72重组蛋白作为包被抗原,HRP标记的p72特异性单克隆抗体作为酶标抗体,建立了非洲猪瘟病毒抗体阻断酶联免疫吸附试验(EliSA)检测方法。结果显示,该方法中血清以1∶10稀释,... 详细信息

为建立一种非洲猪瘟病毒抗体阻断EliSA检测方法,以原核表达ASFV p72重组蛋白作为包被抗原,HRP标记的p72特异性单克隆抗体作为酶标抗体,建立了非洲猪瘟病毒抗体阻断酶联免疫吸附试验(EliSA)检测方法。结果显示,该方法中血清以1∶10稀释,酶标单抗以1∶6000稀释,临界值为50.12%。该方法特异性强,与猪流行性腹泻病毒(PEDV)、猪传染性胃肠炎病毒(TGEV)、猪瘟病毒(CSFV)、伪狂犬病病毒(PRV)和猪繁殖与呼吸综合征病毒(PRRSV)阳性血清无交叉反应。对强阳性血清的最低稀释度为1∶640,弱阳性血清的最低稀释度为1∶10,具有较高的敏感性;重复性好,批内和批间变异系数均小于5%。应用所建立的方法与商品化同类检测试剂盒对174份血清进行检测,ASFV抗体阳性符合率为100%,阴性符合率为96.75%,总符合率为97.28%。建立的阻断EliSA方法可用于非洲猪瘟病毒抗体检测。

关键词：非洲猪瘟病毒 p72蛋白单克隆抗体阻断酶联免疫吸附试验

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Design and tests of the prototype a beam monitor of the CSR external target experiment

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Nuclear Science and Techniques 2022年第3期33卷 137-151页

作者： Hu-lin Wang Zhen Wang Chao-Song Gao jian-Wei liao Xiang-Ming Sun Hai-Bo Yang Cheng-Xin Zhao Jun liu Peng Ma zi-li li Bi-Hui You Ping Yang Di Guo Le Xiao Dong-liang zhang yue-Zhao zhang Sheng Dong Wan-Han Feng yu-Xin qiao Zheng-yu Hu Qing-wen Ye Zeng-Tao Guo Guang-Ming huang Feng liu PLAC Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal UniversityWuhan 430079China Hubei Provincial Engineering Research Center of Silicon Pixel Chip&Detection Technology Wuhan 430079China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

A prototype beam monitor was designed to provide tracking information for heavy-ion projectiles for the cool storage ring(CSR)external target experiment(CEE)at the Heavy Ion Research Facility in Lanzhou(HIRFL).High granularity and direct charge sensing are the main features of this *** measures the beam position in a two-dimensional(2D)plane transverse to the beam direction on an event-by-event *** current design consists of two field cages inside a single vessel that operates independently and has electrical drift fields in orthogonal *** tests of the prototype were performed using a^(241)Am a *** results show that a spatial resolution of less than 40μm and a time resolution of less than 600 ns can be achieved.

关键词： CEE Beam monitor Heavy ion Topmetal sensor Tracking Field cage

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Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 195-206页

作者： Hai-Sheng Zhao Dong li Shao-lin Xiong Yan-Qiu zhang Yang Su Wei Chen Yi Zhao Xiao-Bo li Jia-Cong liu wen-Xi Peng Rui qiao Xin-qiao li Xiang-Yang wen li-Ming Song shi-Jie Zheng Xin-Ying Song Xiao-yun Zhao yue huang Shuang-Nan zhang Shuo Xiao Ce Cai Zheng-Hua An Can Chen Gang Chen Wei Chen Yan-Qi du Min Gao Ke Gong Dong-Ya Guo Zhi-Wei Guo jian-jian He Bin li Chao li Chao-Yang li Gang li jian-Hui li Lu li Qing-Xin li Yan-Guo li Jing liang Xiao-Hua liang Jin-yuan liao Xiao-Jing liu Ya-Qing liu Qi Luo Xiang Ma Bin Meng Ge Ou Dong-li shi Jing-Yan shi Gong-Xing Sun Xi-Lei Sun You-li Tuo Chen-Wei Wang Hui Wang Jin Wang Jin-Zhou Wang Ping Wang wen-Shuai Wang hong Wu Sheng-Lun Xie Yan-Bing Xu yu-Peng Xu Wang-Chen Xue Sheng Yang Min Yao jian-Ying Ye Qi-Bin Yi Chao-yue zhang Da-li zhang Fan zhang Fei zhang hong-Mei zhang Kai zhang Peng zhang Xiao-Lu zhang Zhen zhang Guo-Ying Zhao shi-Yi Zhao Chao Zheng Xing Zhou yue Zhu Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China Physics and Space Science College China West Normal UniversityNanchong 637002China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics Changchun University of Science and TechnologyChangchun 130022China College of Physics and Engineering Qufu Normal UniversityQufu 273165China College of Physics Sciences&Technology Hebei UniversityBaoding 071002China

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)during the flare event on 2022 April 21 at 01:52 *** subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase,and the key feature is that they appear in pairs and seem like double-peak *** subpeaks are rarely observed in hard X-ray band and confirmed by the microwave obtained by Nobeyama Radio Polarimeters(NoRP)and Radio Solar Telescope Network(RSTN).While an exponential function can describe the continuum component of the time profile from the precursor to part of the impulsive *** periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase,respectively,with at least 95%confidence *** paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our *** precursor phase can be interpreted as the oscillating coalescence of two islands,while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

关键词： solar flare QPPs loop coalescence circular-ribbon flare

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