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progress in Natural Science:Materials International 2020年第3期30卷 410-416页

作者： Xinyu ren Haishui ren Yonglai Shang Huaping xiong Kai Zhang Jinghua Zheng Dong liu Jianguo lin jun Jiang Welding and plastic Forming division Beijing Institute of Aeronautical Materials HH Wills physics Laboratory School of Physics University of Bristol Department of Mechanical Engineering Imperial College London

Joining of TiAlNb alloy to TiAl intermetallics was conducted by the newly-developed Ti–Ni–Nb–Zr brazing filler *** microstructure evolution of the joints was investigated by scanning electron microscope (SEM),energy dispersive spectrometer (EDS) and electron backscatter diffraction (EBSD).The macro-micro mechanical properties were studied by shear test and nano-indentation *** interfacial microstructures across the brazing seam were TiAlNb substrate,α-TiAl+β-Ti,γ-TiAl+TiNi+TiNi+α-TiAl,α-TiAl+β-Ti,TiAl *** TiNi phase were firstly dissolved in the joints brazed at 1000°C for 10 min and then precipitated after a prolonged holding time of 15 *** nano-indentation test revealed that TiNi phase exhibited the highest hardness of 12.60 *** joints brazed at 1000°C/15 min presented the maximum shear strength of271 *** dissolution and precipitation behavior of TiNi phase was also discussed.

关键词： Brazing TiAl Ti2AlNb EBSD Microstructure evolution Nano-indentation

Surface superconductivity in the type Ⅱ Weyl semimetal TaIrTe4

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National Science review 2020年第3期7卷 579-587页

作者： Ying Xing Zhibin Shao jun Ge Jiawei Luo Jinhua Wang Zengwei Zhu jun liu Yong Wang Zhiying Zhao Jiaqiang Yan David Mandrus Binghai Yan xiong-jun liu Minghu pan Jian Wang Department of Materials Science and Engineering College of New Energy and Materials China University of Petroleum International Center for Quantum Materials School of Physics Peking University School of physics and Information Technology Shaanxi Normal University School of physics Huazhong University of Science and Technology Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Center of Electron Microscopy State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Department of Materials Science and Engineering University of Tennessee Department of physics and Astronomy University of Tennessee Materials Science and Technology division Oak Ridge National Laboratory Department of Condensed Matter physics Weizmann Institute of Science CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing Academy of Quantum Information Sciences Collaborative Innovation Center of Quantum Matter

The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe4is a newly predicted time-reversal invariant type Ⅱ Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal Ta Ir Te4. Our scanning tunneling microscopy/spectroscopy(STM/STS) visualizes Fermi arc surface states of TaIrTe4that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature(Tc) up to 1.54 K being observed. The normalized upper critical field h*(T/Tc) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness-and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1 D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe4provides a new novel platform to explore topological superconductivity and Majorana modes.

关键词： surface superconductivity Weyl semimetal topological superconductivity

Chapter 1 LHAASO Instruments and Detector technology

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Chinese physics C 2022年第3期46卷 1-35页

作者： Xin-Hua Ma Yu-Jiang Bi Zhen Cao Ming-jun Chen Song-Zhan Chen Yao-Dong Cheng Guang-Hua Gong Min-Hao Gu Hui-Hai He Chao Hou Wen-Hao Huang Xing-Tao Huang Cheng liu Oleg Shchegolev Xiang-Dong Sheng Yuri Stenkin Chao-Yong Wu Han-rong Wu Sha Wu Gang Xiao Zhi-Guo Yao Shou-Shan Zhang Yi Zhang xiong Zuo Key Laboratory of particle Astrophyics&Experimental physics division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China TIANFU Cosmic ray research Center ChengduSichuanChina university of Chinese Academy of Sciences Beijing 100049China Department of Engineering physics Tsinghua UniversityBeijing 100084China institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237ShandongChina institute for Nuclear research of russian Academy of Sciences Moscow 117312Russia moscow institute of physics and Technology Moscow 141700Russia Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina

The Large High Altitude Air Shower Observatory(LHAASO)(Fig.1)is located at ***(4410 m a.s.l.,600 g/cm^(2),29°21'27.56"N,100°08'19.66"E)in Daocheng,Sichuan province,*** consists of 1.3 km^(2) array(KM2A)of electromagnetic particle detectors(ED)and muon detectors(MD),a water Cherenkov detector array(WCDA)with a total active area of 78,000 m^(2),18 wide field-of-view air Cherenkov telescopes(WFCTA)and a newly proposed electron-neutron detector array(ENDA)covering 10,000 m^(2).Each detector is synchronized with all the other through a clock synchronization network based on the White rabbit *** observatory includes an IT center which comprises the data acquisition system and trigger system,the data analysis *** this Chapter,all the above-mentioned components of LHAASO as well as infrastructure are described.

关键词： LHAASO gamma ray astronomy cosmic ray physics

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把握机会窗口期减缓气候变化对中国居民健康影响

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科学通报 2023年第15期68卷 1899-1905页

作者：蔡闻佳张弛张诗卉艾思奇白玉琪鲍俊哲常楠陈彬陈慧琪程亮亮崔学勤戴瀚程 Bawuerjiang Danna 底骞董伟董文轩窦德景范维澄范星房小怡高仝高源耿阳关大博郭亚菲 Ian Hamilton 胡艺馨华峻翊黄存瑞黄弘黄建斌蒋俏蕾姜晓朋柯丕煜 Gregor Kiesewetter pete Lampard 李传玺李瑞奇李双利梁璐林波荣林华亮刘欢刘起勇刘小波刘心远刘昱甫刘钊刘竹楼书含鲁晨曦罗勇罗震宇马伟 Alice McGushin 牛彦麟任超阮增良 Wolfgang Schöpp 单钰理苏婧孙韬淳王灿王琼文三妹谢杨熊辉徐冰徐朦颜钰杨军杨廉平杨秀俞乐岳玉娟曾仪娉张镜张少辉张曜张仲宸赵继尧赵亮赵梦真赵琦赵哲周景博朱征宏陈冯富珍宫鹏清华大学地球系统科学系北京100084 北京理工大学管理与经济学院北京100081 中山大学公共卫生学院广州510080 郑州大学公共卫生学院郑州450001 南京医科大学公共卫生学院南京211166 北京师范大学环境学院北京100875 北京大学环境工程学院北京100871 清华大学新闻与传播学院北京100084 清华大学万科公共卫生学院北京100084 浙江大学地球科学学院杭州310058 清华大学公共安全研究所北京100084 清华大学工程物理系北京100084 百度研究院北京100091 山东师范大学环境与生态研究院济南250013 中国气象科学研究院气象影响与风险研究中心北京100086 山东师范大学商学院济南250013 中国疾病预防控制中心传染病预防控制所传染病预防控制国家重点实验室北京102206 清华大学建筑学院北京100084 中国疾病预防控制中心环境与人群健康重点实验室环境与健康相关产品安全所北京102206 Energy institute University College LondonLondon WC1E 6BTUK 南方科技大学统计与数据科学系深圳518055 香港大学建筑学院中国香港999077 世界卫生组织驻华代表处北京100600 pollution Management research Group EnergyClimateand Environment ProgramInternational Institute for Applied Systems Analysis(IIASA)Schlossplatz 1-A-2361 LaxenburgAustria Department of Health Sciences University of YorkYork YO105DDCanada 山东大学齐鲁医学院公共卫生学院流行病学系济南250002 中国科学技术大学计算机科学与技术学院合肥230027 Department of Geography and the Environment University of North TexasDenton TX 76203-5017USA 清华大学环境学院北京100084 Geography College of Life and Environmental SciencesUniversity of ExeterExeter EX12LUUK 山东大学气候变化与健康研究中心济南250002 institute for Global Health University College LondonLondon WC1H 0ALUK School of Geography Earth and Environmental SciencesUniversity of BirminghamBirmingham B152TTUK 清华大学人文学院北京100084 北京航空航天大学经济与管理学院北京100083 香港科技大学(广州)信息枢纽人工智能学域广州511443 暨南大学环境与气候研究所广州510632 清华大学气候变化与可持续发展研究院北京100084 清华大学苏世民学院北京100084 清华大学体育学部北京100084 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室北京100029 香港大学地球科学系和地理系中国香港999077

随着中国总人口的不断增加以及改革开放以来经济的飞速发展,中国面临来自气候变化的健康威胁也在不断上升.与此同时,中国也处于一个独特的机遇窗口期,如果能够有效应对气候变化带来的健康风险,将造福今后几代人的健康.反之,如果没有及... 详细信息

随着中国总人口的不断增加以及改革开放以来经济的飞速发展,中国面临来自气候变化的健康威胁也在不断上升.与此同时,中国也处于一个独特的机遇窗口期,如果能够有效应对气候变化带来的健康风险,将造福今后几代人的健康.反之,如果没有及时、充分的应对措施,气候变化对中国居民健康和生命的威胁将与日俱增.为了推动更及时且有利于改善人群健康的气候应对行动,由清华大学牵头建立的柳叶刀倒计时亚洲中心在全球柳叶刀倒计时工作的基础上[1,2],从2020年开始,聚焦气候变化对中国人群健康的影响进行全面且系统的评估[3,4].

关键词：减缓气候变化人群健康柳叶刀居民健康窗口期倒计时应对措施把握机会

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