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Parallelized volumetric fluorescence microscopy with a reconfigurable coded incoherent light-sheet array

Light(Science & Applications) 2020年第1期9卷 1914-1924页

作者： Yu-Xuan Ren jianglai wu Queenie T.K.Lai Hei Ming Lai Dickson M.D.Siu wutian wu Kenneth K.Y.Wong Kevin K.Tsia Department of Electrical and Electronic Engineering The University of Hong KongPokfulam RoadHong KongSAR 999077China Department of Physics University of CaliforniaBerkeleyCA 94720USA School of Biomedical Sciences Li Ka Shing Faculty of MedicineThe University of Hong KongHong KongSAR 999077China Department of Psychiatry Faculty of MedicineThe Chinese University of Hong KongHong KongSAR 999077China GHM Institute of CNS Regeneration Jinan University601 Huangpu Avenue WestGuangzhou 510632China Re-Stem Biotechnology Suzhou 215007China

Parallelized fluorescence imaging has been a long-standing pursuit that can address the unmet need for a comprehensive three-dimensional(3D)visualization of dynamical biological processes with minimal ***,the available approaches are limited to incomplete parallelization in only two dimensions or sparse sampling in three *** hereby develop a novel fluorescence imaging approach,called coded light-sheet array microscopy(CLAM),which allows complete parallelized 3D imaging without mechanical *** the concept of an“infinity mirror”,CLAM generates a light-sheet array with controllable sheet density and degree of ***,CLAM circumvents the common complications of multiple coherent light-sheet generation in terms of dedicated wavefront engineering and mechanical dithering/***,the encoding of multiplexed optical sections in CLAM allows the synchronous capture of all sectioned images within the imaged *** demonstrate the utility of CLAM in different imaging scenarios,including a light-scattering medium,an optically cleared tissue,and microparticles in fluidic *** can maximize the signal-to-noise ratio and the spatial duty cycle,and also provides a further reduction in photobleaching compared to the major scanning-based 3D imaging *** flexible implementation of CLAM regarding both hardware and software ensures compatibility with any light-sheet imaging modality and could thus be instrumental in a multitude of areas in biological research.

关键词： scattering light mirror

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多孔碳球制备及应用研究进展

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化工新型材料 2014年第12期42卷 217-219页

作者：吴为亚程江来商永嘉芜湖职业技术学院材料工程学院芜湖241003 安徽师范大学化学与材料科学学院芜湖241000

多孔碳球因其具有完美的球形和丰富的孔道而受到人们的普遍关注。综述了近年来国内外多孔碳球的研究进展,包括多孔碳球的制备方法,如模板法、溶剂热法、化学气相沉积法、超声喷雾热分解法等,以及多孔碳球在吸附、电化学、催化等领域的应... 详细信息

多孔碳球因其具有完美的球形和丰富的孔道而受到人们的普遍关注。综述了近年来国内外多孔碳球的研究进展,包括多孔碳球的制备方法,如模板法、溶剂热法、化学气相沉积法、超声喷雾热分解法等,以及多孔碳球在吸附、电化学、催化等领域的应用;并对其未来研究发展的方向进行了展望。

关键词：多孔碳球制备应用

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Constraining self-interacting dark matter with the full dataset of PandaX-II

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Science China(Physics,Mechanics & Astronomy) 2021年第11期64卷 2-7页

作者： Jijun Yang Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Ke Han Changda He Shengming He Di Huang Yan Huang Ran Huo Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie Li Qing Lin Huaxuan Liu jianglai Liu Xiaoying Lu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Nasir Shaheed Kaixiang Ni Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang Guofang Shen Lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang QiuHong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng wu Shiyong wu Weihao wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei Xie Binbin Yan Yong Yang Chunxu Yu Hai-Bo Yu Jumin Yuan Ying Yuan Xinning Zeng Dan Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou School of Physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Laboratory for Particle Astrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institude Chengdu 610213China Yalong River Hydropower Development Company Ltd.Chengdu 610051China School of Physics Sun Yat-sen UniversityGaungzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 100191China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China Shandong Institute of Advanced Technology Jinan 250103China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityJinan 250100China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Department of Physics and Astronomy University of CaliforniaRiversideCalifornia 92507USA Center of High Energy Physics Peking UniversityBeijing 100871China

Self-interacting dark matter(SIDM)is a leading candidate proposed to solve discrepancies between predictions of the prevailing cold dark matter theory and observations of *** SIDM models predict the existence of a light force carrier that mediates strong dark matter *** the mediator couples to the standard model particles,it could produce characteristic signals in dark matter direct detection *** report searches for signals of SIDM models with a light mediator using the full dataset of the PandaX-II experiment,basing on a total exposure of 132 *** significant excess over background is found,and our likelihood analysis leads to a strong upper limit on the dark matter-nucleon coupling *** further combine the PandaX-II constraints and those from observations of the light element abundances in the early universe,and show that direct detection and cosmological probes can provide complementary constraints on dark matter models with a light mediator.

关键词： dark matter direct detection self-interacting dark matter

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“一码管地”框架下的土地全生命周期数据关联模型研究

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地理空间信息 2024年第5期22卷 66-69页

作者：吴颖王将来徐蓓蓓武汉天恒信息技术有限公司湖北武汉430000 自然资源部长江中游国土调查监测工程技术创新中心湖北武汉430000

针对数字时代背景下需对土地全生命周期建立数据关联模型的紧迫需求,基于信息本体论制定统一的“地块”与“业务”编码规则;再利用人地关系理论建立地地索引表、地业索引表和业业索引表,通过“地块码”和“业务码”主键解决业务、人、... 详细信息

针对数字时代背景下需对土地全生命周期建立数据关联模型的紧迫需求,基于信息本体论制定统一的“地块”与“业务”编码规则;再利用人地关系理论建立地地索引表、地业索引表和业业索引表,通过“地块码”和“业务码”主键解决业务、人、地块之间的基本关联关系。利用数据挖掘技术构建业务知识图谱,从而建立空间相离的业务关联关系,实现土地全要素、全业务、全流程的数据纵横贯通、信息高效协同。实践结果表明,该方法可快速可靠地构建土地全生命周期数据关联模型,为自然资源数字化改革提供坚实基础。

关键词： “一码管地” 土地全生命周期数据关联模型人地关系知识图谱

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Dark matter direct search sensitivity of the PandaX-4T experiment

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Science China(Physics,Mechanics & Astronomy) 2019年第3期62卷 49-57页

作者： HongGuang Zhang Abdusalam Abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui BinBin Dong DeQing Fang ChangBo Fu Karl Giboni Franco Giuliani LinHui Gu XuYuan Guo ZhiFan Guo Ke Han ChangDa He ShengMing He Di Huang XingTao Huang Zhou Huang Peng Ji XiangDong Ji YongLin Ju ShaoLi Li Yao Li Heng Lin HuaXuan Liu jianglai Liu YuGang Ma YaJun Mao KaiXiang Ni JinHua Ning XiangXiang Ren Fang Shi AnDi Tan AnQing Wang Cheng Wang HongWei Wang Meng Wang QiuHong Wang SiGuang Wang XiuLi Wang XuMing Wang Zhou Wang MengMeng wu ShiYong wu JingKai Xia MengJiao Xiao PengWei Xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu JuMin Yuan JianFeng Yue Dan Zhang Tao Zhang Li Zhao QiBin Zheng JiFang Zhou Ning Zhou XiaoPeng Zhou Shanghai Key Laboratory for Particle Physics and Cosmology Institute of Nuclear and Particle Physics (INPC) (INPC) and School of Physics and AstronomyShanghai Jiao Tong University School of Physics and Technology Xinjiang University Shanghai Key Laboratory for Particle Physics and Cosmology Institute of Nuclear and Particle Physics (INPC) and School of Physics and AstronomyShanghai Jiao Tong University Yalong River Hydropower Development Company Ltd. Shanghai Institute of Applied Physics Chinese Academy of Sciences School of Mechanical Engineering Shanghai Jiao Tong University School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE)(MOE) Shandong University School of Physics Nankai University Tsung-Dao Lee Institute School of Physics Peking University Department of Physics University of Maryland College Park School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong University Center of High Energy Physics Peking University School of Medical Instrument and Food Engineering University of Shanghai for Science and Technology

The Panda X-4T experiment, a 4-ton scale dark matter direct detection experiment, is being planned at the China Jinping Underground Laboratory. In this paper we present a simulation study of the expected background in this experiment. In a 2.8-ton fiducial mass and the signal region between 1-10 keV electron equivalent energy, the total electron recoil background is found to be 4.9 × 10^(-5) kg^(-1) d^(-1) keV^(-1). The nuclear recoil background in the same region is 2.8 × 10^(-7) kg^(-1) d^(-1) keV^(-1). With an exposure of 5.6 ton-years, the sensitivity of Panda X-4 T could reach a minimum spin-independent dark matter-nucleon cross section of 6 × 10^(-48) cm^2 at a dark matter mass of 40 Ge V/c^2.

关键词： dark matter WIMPs direct detection xenon

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An improved evaluation of the neutron background in the PandaX-Ⅱ experiment

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Science China(Physics,Mechanics & Astronomy) 2020年第3期63卷 54-63页

作者： QiuHong Wang Abdusalam Abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui YingJie Fan DeQing Fang ChangBo Fu LiSheng Geng Karl Giboni Franco Giuliani LinHui Gu XuYuan Guo Ke Han ChangDa He Di Huang Yan Huang YanLin Huang Zhou Huang Peng Ji XiangDong Ji YongLin Ju YiHui Lai Kun Liang HuaXuan Liu jianglai Liu WenBo Ma YuGang Ma YaJun Mao Yue Meng Parinya Namwongsa KaiXiang Ni JinHua Ning XuYang Ning XiangXiang Ren ChangSong Shang Lin Si AnDi Tan AnQing Wang HongWei Wang Meng Wang SiGuang Wang XiuLi Wang Zhou Wang MengMeng wu ShiYong wu JingKai Xia MengJiao Xiao PengWei Xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu Jumin Yuan Dan Zhang HongGuang Zhang Tao Zhang Li Zhao QiBin Zheng JiFang Zhou Ning Zhou XiaoPeng Zhou Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai Laboratory for Particle Physics and CosmologyShanghai 200240China Yalong River Hydropower Development Company Ltd.Chengdu 610051China School of Physics Nankai UniversityTianjin 300071China School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Tsung-Dao Lee Institute Shanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Peking UniversityBeijing 100871China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Center of High Energy Physics Peking UniversityBeijing 100871China University of Chinese Academy of Sciences Beijing 100049China

In dark matter direct detection experiments,neutron is a serious source of background,which can mimic the dark matter-nucleus scattering *** this paper,we present an improved evaluation of the neutron background in the PandaX-II dark matter experiment by a novel *** of fully relying on the Monte Carlo simulation,the overall neutron background is determined from the neutron-induced high energy signals in the *** addition,the probability of producing a dark-matter-like background per neutron is evaluated with a complete Monte Carlo generator,where the correlated emission of neutron(s)andγ(s)in the(α,n)reactions and spontaneous fissions is taken into *** this method,the neutron backgrounds in the Run 9(26-ton-day)and Run 10(28-ton-day)data sets of PandaX-II are estimated to be(0.66±0.24)and(0.47±0.25)events,respectively.

关键词： dark matter direct detection xenon neutron background high energy gamma neutron generator

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PandaX: a liquid xenon dark matter experiment at CJPL

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Science China(Physics,Mechanics & Astronomy) 2014年第8期57卷 1476-1494页

作者： CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HE Ming HU Jie HUANG XingTao JI XiangDong JU YongLin LI ShaoLi LIN Qing LIU HuaXuan LIU jianglai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg WANG HongWei WANG JiMing WANG Meng WANG XuMing WANG Zhou WEI YueHuan wu ShiYong XIAO MengJiao XIAO Xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li ZHOU XiaoPeng ZHU ZhongHua Shanghai Institute of Applied Physics The Institute of Nuclear and Particle Physics Astronomy and Cosmology (INPAC) and Department of Physics and AstronomyShanghai Jiao Tong University Yalong River Hydropower Development Company Ltd. School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE) Shandong University School of Physics Peking University Department of Physics University of Maryland College Park MD 20742 USA School of Mechanical Engineering Shanghai Jiao Tong University Department of Physics University of Michigan Ann Arbor MI 48109 USA

PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay *** central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton *** experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,*** detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional *** this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.

关键词： dark matter liquid xenon detector underground experiment time projection chamber

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First dark matter search results from the PandaX-Ⅰ experiment

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Science China(Physics,Mechanics & Astronomy) 2014年第11期57卷 2024-2030页

作者： XIAO MengJiao XIAO Xiang ZHAO Li CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HU Jie HUANG XingTao JI XiangDong JU YongLin LEI SiAo LI ShaoLi LIN Qing LIU HuaXuan LIU jianglai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing STEPHENSON Scott TAN AnDi TARL Greg WANG HongWei WANG JiMin WANG Meng WANG XuMing WANG Zhou WEI YueHuan wu ShiYong XIE PengWei YOU YingHui ZENG XiongHui ZHANG Hua ZHANG Tao ZHU ZhongHua The Institute of Nuclear and Particle Physics Astronomy and Cosmology (INPAC) and Department of Physics and AstronomyShanghai Jiao Tong University Shanghai Institute of Applied Physics Chinese Academy of Sciences Yalong River Hydropower Development Company Ltd. School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE) Shandong University School of Physics Peking University Department of Physics University of MarylandCollege ParkMD20742USA School of Mechanical Engineering Shanghai Jiao Tong University Department of Physics University of MichiganAnn ArborMI48109USA

We report on the first dark-matter(DM)search results from PandaX-I,a low threshold dual-phase xenon experiment operating at the China JinPing Underground *** the 37-kg liquid xenon target with 17.4 live-days of exposure,no DM particle candidate event was *** result sets a stringent limit for low-mass DM particles and disfavors the interpretation of previously-reported positive experimental *** minimum upper limit,3.7×10-44cm2,for the spin-independent isoscalar DM-particle-nucleon scattering cross section is obtained at a DM-particle mass of 49 GeV/c2at 90%confidence level.

关键词： dark matter direct detection xenon

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双探头高纯锗γ谱仪灵敏度研究

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核技术 2022年第8期45卷 31-39页

作者：姚玉坤张涛程晨谌勋刘江来孟月钱志成司琳王思广武蒙蒙上海交通大学物理与天文学院粒子与核物理研究所上海市粒子物理和宇宙学重点实验室粒子天体物理与宇宙学教育部重点实验室上海200240 中山大学物理学院广州510275 上海交通大学四川研究院成都610000 上海交通大学李政道研究所上海200240 北京大学物理学院核物理与核技术国家重点实验室及高能物理研究中心北京100871

在暗物质和中微子等稀有衰变实验中,探测器材料中的放射性核素衰变所产生的射线诱发实验本底,其沉积能量可能与信号能区重叠。精确测量探测器材料的放射性,更好地理解本底来源和控制实验本底是提升探测器灵敏度的关键。高纯锗γ谱仪能... 详细信息

在暗物质和中微子等稀有衰变实验中,探测器材料中的放射性核素衰变所产生的射线诱发实验本底,其沉积能量可能与信号能区重叠。精确测量探测器材料的放射性,更好地理解本底来源和控制实验本底是提升探测器灵敏度的关键。高纯锗γ谱仪能量分辨率高,对样品几何形状没有要求,不需要对样品进行破坏性加工,是广泛应用的放射性测量仪器之一。PandaX合作组在锦屏地下实验室已搭建两套高纯锗γ谱仪(JP1和JP2),为暗物质和中微子实验甄选低本底材料。为提升高纯锗γ谱仪的灵敏度,精确测量更低放射性的材料,我们在现有JP1的基础上,设计双探头高纯锗γ谱仪。通过提升效率和降低本底两种方法,对暗物质和中微子实验关心的不同核素,相比于现有JP1,双探头高纯锗γ谱仪灵敏度预期可提升2~4倍。双探头高纯锗γ谱仪还可以用γ-γ符合方法测量小尺寸的样品,这种测量方式的灵敏度随测量时间有显著提升。

关键词：双探头高纯锗γ谱仪极低放射性本底稀有衰变实验深地实验

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水热处理增强磷酸钴催化臭氧分解性能的研究

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材料导报 2021年第S2期35卷 81-85页

作者：杜广智张骞廖继飞林玉伍凡向将来王晓如张瑞阳西南石油大学油气藏地质及开发工程国家重点实验室成都610500 西南石油大学新能源与材料学院新能源材料及技术研究中心成都610500

臭氧污染逐渐取代PM 2.5成为大气首要污染物,因此臭氧污染是亟待解决的环境问题。在众多臭氧治理方法中,催化分解臭氧是较为环保、低能耗和低二次污染的臭氧治理方法。钴基无机酸盐由于丰富的表面氧和良好的电子传递能力,在臭氧催化分... 详细信息

臭氧污染逐渐取代PM 2.5成为大气首要污染物,因此臭氧污染是亟待解决的环境问题。在众多臭氧治理方法中,催化分解臭氧是较为环保、低能耗和低二次污染的臭氧治理方法。钴基无机酸盐由于丰富的表面氧和良好的电子传递能力,在臭氧催化分解方面具有很大的潜力。本文首先通过简单的共沉淀法制备了不同的钴基无机酸盐,并用于催化臭氧分解的研究,结果表明Co_(3)(PO_(4))_(2)(G-CP)具有相对优异的催化臭氧分解性能。随后,对G-CP样品进一步水热处理,得到改性的G-CP(Hy-CP),实现了催化臭氧分解的活性和稳定性的有效提升。水热处理12 h的Hy-CP(Hy-CP-12)在与臭氧反应6 h后仍保持76%的分解效率,相较于G-CP活性提升了2.1倍。利用XRD、SEM、BET和XPS等测试手段,证明水热处理会使G-CP的晶体结构和形貌发生变化,并且增加了G-CP的比表面积。此外,水热处理会明显增加G-CP的表面氧含量,这对臭氧分解具有重要作用,因而可以有效改善G-CP的臭氧催化分解活性。

关键词：磷酸钴共沉淀催化分解臭氧水热法

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