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A Localization Method of High Energy Transients for All-sky Gamma-ray Monitor

Research in Astronomy and Astrophysics 2024年第10期24卷 25-35页

作者： Yi Zhao Wangchen Xue Shaolin Xiong Qi Luo Yuanhao Wang Jiacong Liu Heng Yu xiaoyun Zhao Yue Huang jinyuan Liao Jianchao Sun xiaobo Li Qibin Yi Ce Cai Shuo xiao Shenglun Xie Chao Zheng Yanqiu zhang Chenwei Wang Wenjun Tan Zhiwei Guo Chaoyang Li Zhenghua An Gang Chen Yanqi Du Min Gao Ke Gong Dongya Guo Jiang He Jianjian He Bing Li Gang Li Xinqiao Li jing Liang xiaohua Liang Yaqing Liu Xiang Ma Rui Qiao Liming Song Xinying Song Xilei Sun jin Wang Ping Wang Xiangyang Wen Hong Wu Yanbing Xu Sheng Yang Dali zhang Fan zhang Hongmei zhang Peng zhang Shu zhang Zhen zhang Shijie Zheng Keke zhang Xingbo Han Haiyan Wu Hu Tai Hao Geng Gaopeng Lu Wei Xu Fanchao Lyu Hongbo zhang Fangjun Lu Shuangnan zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese academy of sciences Beijing 100049China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China College of Physics Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China institute of Astrophysics Central China Normal UniversityWuhan 430079China College of physics sciences Technology Hebei UniversityBaoding 071002China Physics and Space Science College China West Normal UniversityNanchong 637002China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China College of Electronic and information Engineering Tongji UniversityShanghai 201804China Innovation academy for Microsatellites of{1. Shanghai 201304China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Earth and Space sciences University of Science and Technology of ChinaHefei 230026China Electronic Information School Wuhan UniversityWuhan 430072China Key Laboratory of Transportation Meteorology of china Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210000China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Fast and reliable localization of high-energy transients is crucial for characterizing the burst properties and guiding the follow-up *** based on the relative counts of different detectors has been widely used for all-sky gamma-ray *** are two major methods for this count distribution localization:χ^(2.minimization method and the Bayesian *** we propose a modified Bayesian method that could take advantage of both the accuracy of the Bayesian method and the simplicity of the χ^(2.*** comprehensive simulations,we find that our Bayesian method with Poisson likelihood is generally more applicable for various bursts than the χ^(2.method,especially for weak *** further proposed a location-spectrum iteration approach based on the Bayesian inference,which could alleviate the problems caused by the spectral difference between the burst and location *** method is very suitable for scenarios with limited computation resources or timesensitive applications,such as in-flight localization software,and low-latency localization for rapidly follow-up observations.

关键词： methods:data analysis methods:analytical (stars:)gamma-ray burst:general

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The FAST all sky HI survey(FASHI):The first release of catalog

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Science china(Physics,Mechanics & Astronomy) 2024年第1期67卷 112-133页

作者： Chuan-Peng zhang Ming Zhu Peng Jiang Cheng Cheng {1.g Wang {2. Wang {1.-Long Xu xiao-Lan Liu Nai-Ping Yu Lei Qian Haiyang Yu Mei Ai Ying{2. {1.g Chen Xu Ziming Liu Xin Guan Chun Sun Qingliang Yang Menglin Huang Qiaoli Hao FAST Collaboration Guizhou Radio Astronomical Observatory Guizhou UniversityGuiyang 550000China National Astronomical Observatories Chinese Academy of Sciences(CAS)Beijing 100101China chinese {1. of {2. South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China Kavli institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China

The FAST All Sky HI survey(FASHI)was designed to cover the entire sky observable by the Five-hundred-meter Aperture Spherical radio Telescope(FAST),spanning approximately 2.000 square degrees of declination between-1.°and+66°,and in the frequency range of 1.50-1.50 MHz,with the expectation of eventually detecting more than 1.0000 HI *** August 2.2. and June 2.2.,FASHI had covered more than 7600 square degrees,which is approximately 35%of the total sky observable by *** has a median detection sensitivity of around 0.76 m Jy beam-1.nd a spectral line velocity resolution of~6.4 km s-1.t a frequency of~1.4 *** of now,a total of 41.41.extragalactic HI sources have been detected in the frequency range 1.05.5-1.1..5 MHz,corresponding to a redshift limit of z■*** cross-matching FASHI sources with the Siena Galaxy Atlas(SGA)and the Sloan Digital Sky Survey(SDSS)catalogs,we found that 1.972.40.7%)sources have spectroscopic redshifts and 1.975(2..3%)sources have only photometric *** of the remaining 1.794(33.0%)HI sources are located in the direction of the Galactic plane,making their optical counterparts difficult to identify due to high extinction or high contamination of Galactic stellar *** on current survey results,the FASHI survey is an unprecedented blind extragalactic H I *** has higher spectral and spatial resolution and broader coverage than the Arecibo Legacy Fast ALFA Survey(ALFALFA).When completed,FASHI will provide the largest extragalactic HI catalog and an objective view of HI content and large-scale structure in the local universe.

关键词： surveys redshifts galaxies telescope radio lines HI line

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生态环境民生理论与新时期发展任务探究

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中国环境科学 2024年第8期44卷 4700-4708页

作者：王金南张晓婧薛强路路李宏伟胡熠张杰秦昌波生态环境部环境规划院北京100041 生态环境部环境规划院美丽中国研究中心北京100041 生态环境部环境规划院战略规划研究所北京100041 中共中央党校(国家行政学院)社会和生态文明教研部北京100091 中共福建省委党校福建福州350108

生态环境作为一项基本公共服务已经成为我国民生体系中的重要组成部分,但目前为止,生态环境民生概念的内涵尚不清晰,理论逻辑、任务路径等研究要点分散,未能形成学界共识.为建立生态环境民生从理论框架、战略路径到任务体系的整体架构,... 详细信息

生态环境作为一项基本公共服务已经成为我国民生体系中的重要组成部分,但目前为止,生态环境民生概念的内涵尚不清晰,理论逻辑、任务路径等研究要点分散,未能形成学界共识.为建立生态环境民生从理论框架、战略路径到任务体系的整体架构,本文开展理论溯源分析,厘清了其在人文社科、自然科学、经济学等多个领域的相关概念、发展路线和研究方向,总结了生态环境民生与中国传统文化及马克思主义自然观的传承关系、与环境正义的演化关系和与人类福祉研究、生态产品价值实现的验证关系.文章结合生态系统服务供给研究和马斯洛需求层次理论初步解析了生态环境民生理论内涵,给出了生态环境与民生福祉的内在联系与时代特征等理论要点,根据新时期对生态环境民生建设的需求建立了以数量、质量、效率三个维度为核心的生态环境民生发展途径,并提出以人民为中心的生态环境质量改善、设定生态产品价值供给区、生态福祉效益释放等主要任务,以期促进生态环境民生研究的系统性发展,并对新时期生态环境民生建设方向提供参考.

关键词：生态环境民生民生福祉习近平生态文明思想美丽中国

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Nerve-heart interplays recorded in rabbit hearts in vivo

Nerve-heart interplays recorded in rabbit hearts in vivo

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第十一次中国生物物理学术大会暨第九届全国会员代表大会

作者： Lei Qian 1,2.,Gu jing-Li 1,3 ,Lüjin 1,3 ,Mu Yu 1,2.,Xiu Yun 1,3 ,Xing Jiang Kang 1 ,Guo Shu1 ,3,Xu Hua-Dong 1,{2. xiao-Yu 1,{2. Claire Xi 1,Cao Ji-Min 3,Li Li-Huan 2.,Zhou Zhuan 1 1institute of Molecular Medicine,Peking University,Beijing 100871,china 2.uwai Hospital,and 3institute of Basic Medical Science,Peking Union Medical College, Beijing 100005,china

＜正＞Neurotransmitter release from presynaptic cells can be recorded by postsynaptic potentials/currents in central nerve ***,little is known about how to record

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Stepped-up development of accelerator mass spectrometry method for the detection of ^(60)Fe with the HI-1. tandem accelerator

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Nuclear Science and Techniques 2024年第4期35卷 136-143页

作者： Yang zhang Sheng-Quan Yan Ming He Qing-zhang Zhao Wen-Hui zhang Chao-Xin Kan Jian-Ming Zhou Kang-Ning Li xiao-Fei Wang Jian-Cheng Liu Zhao-Hua Peng Zhuo Liang Ai-Ling Li Jian Zheng Qi-Wen Fan Yun-Ju Li You-Bao Wang Zhi-Hong Li Yang-Ping Shen Ding Nan Wei Nan Yu-Qiang zhang Jia-Ying-Hao Li Jun-Wen Tian Jiang-Lin Hou Chang-Xin Guo Zhi-Cheng zhang Ming-Hao Zhu Yu-Wen Chen Yu-Chen Jiang Tao Tian jin-Long Ma Yi-Hui Liu jing-Yu Dong Run-Long Liu Mei-Yue-Nan Ma Yong-Shou Chen Wei-Ping Liu Bing Guo china {1. of Atomic Energy P.O.Box 275(10)Beijing 102413China College of Science Southern University of Science and TechnologyShenzhen 518055China School of Physics Xi’an Jiaotong UniversityXi’an 710049China

The Moon provides a unique environment for investigating nearby astrophysical events such as *** samples retain valuable information from these events,via detectable long-lived“fingerprint”radionuclides such as^(60)*** this work,we stepped up the development of an accelerator mass spectrometry(AMS)method for detecting^(60)Fe using the HI-1.tandem accelerator at the china {1. of Atomic Energy(CIAE).Since interferences could not be sufficiently removed solely with the existing magnetic systems of the tandem accelerator and the following Q3D magnetic spectrograph,a Wien filter with a maximum voltage of±60 kV and a maximum magnetic field of 0.3 T was installed after the accelerator magnetic systems to lower the detection background for the low abundance nuclide^(60)Fe.A 1.m thick Si_(3)N_(4) foil was installed in front of the Q3D as an energy *** particle detection,a multi-anode gas ionization chamber was mounted at the center of the focal plane of the ***,an^(60)Fe sample with an abundance of 1.1.2}×1.^(-1.)was used to test the new AMS *** results indicate that^(60)Fe can be clearly distinguished from the isobar^(60)*** sensitivity was assessed to be better than 4.3×1.^(-1.)based on blank sample measurements lasting 5.8 h,and the sensitivity could,in principle,be expected to be approximately 2.5×1.^(-1.)when the data were accumulated for 1.0 h,which is feasible for future lunar sample measurements because the main contaminants were sufficiently separated.

关键词： Accelerator mass spectrometry Wien filter Isobar separation Supernovae Chang'e-5 lunar samples

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Influences of bubble size distribution on propagation of acoustic waves in dilute polydisperse bubbly liquids

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Journal of Hydrodynamics 2019年第1期31卷 50-57页

作者： Yu-ning zhang Zi-biao Jiang {1. Yuan Ting Chen Yu-ning zhang1.Ning-ning Tang {2.-ze Du Key Laboratory of Condition Monitoring and Control for Power Plant Equipment (Ministry of Education) School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China School of Science Wuhan Institute of TechnologyWuhan 430205China College of Mechanical and Transportation Engineering China University of Petroleum - BeijingBeijing 102249China Beijing Key Laboratory of Process Fluid Filtration and Separation China University of Petroleum-BeijingBeijing 102249China

The present paper studies the influences of the bubble size distribution on the propagation of acoustic waves in dilute polydisperse bubbly liquids *** proposed approach is validated by using available experimental data in the *** is revealed that the bubble size distribution has impacts on both the wave speed and the wave ***,the minimum wave speed together with the corresponding frequency could be both significantly affected by the bubble size distribution (e.g.,the standard deviation).Furthermore,the maximum wave attenuation in the frequency response curve is also sensitive to the variations of the bubble size distribution.

关键词： Cavitation gas bubbles wave propagation wave speed wave attenuation

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The Design of GECAM Scientific Ground Segment

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Research in Astronomy and Astrophysics 2024年第10期24卷 1-10页

作者： Shijie Zheng Liming Song Xiang Ma Ping Wang Rui Qiao Yue Huang {1.yun Zhao Hongmei {2. {1.bo Li Mingyu Ge Gang Chen Gongxing Sun Wenxi Peng Ce Cai Wei Chen Yanqi Du Dongya Guo Bing Li Chaoyang Li Jianhui Li Qingxin Li jing Liang Jiacong Liu Ge Ou Dongli Shi jingyan Shi Xinying Song jin Wang Wenshuai Wang Hong Wu Shuo {1. Wangchen Xue Min Yao Jianying Ye Kai {2. Peng {2. {1.lu {2. Yanqiu {2. Guoying Zhao Shiyi Zhao Chao Zheng Shaolin Xiong 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 Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Southwest Jiaotong University Chengdu 611756China Xiangtan University Changsha 411105China Qufu Normal University Qufu 273165China

The Gravitational wave burst high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)is a dedicated mission for monitoring high-energy *** we report the design of the GECAM Scientific Ground Segment(GSGS)in terms of the scientific requirements,including the architecture,the external interfaces,the main function,and *** from the analysis and verification results during the commissioning phase,the GSGS functions well and is able to monitor the status of the payloads,adjust the parameters,develop the scientific observation plans,generate the scientific data products,analyze the data,***,the on-orbit operation and scientific researches of GECAM are guaranteed.

关键词： gravitational waves gamma-rays:general telescopes

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甘肃陇南锑矿区污染及微生物群落结构特征

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环境科学 2024年第7期45卷 4266-4278页

作者：赵清英张泽民谭昭李文杰潘丽波关潇李金花中国环境科学研究院生态研究所北京100012 兰州大学生态学院兰州730000 中国环境科学研究院国家环境保护区域生态过程与功能评估重点实验室北京100012

锑(Sb)是有色金属矿山开采和加工中对环境造成严重威胁的重点污染物,与砷(As)的硫化物和氧化物共存.微生物对土壤中重金属的迁移转化及修复具有重要意义.目前,锑矿不同功能分区(采矿区和冶炼区)中重金属有效态对土壤微生物群落结构的生... 详细信息

锑(Sb)是有色金属矿山开采和加工中对环境造成严重威胁的重点污染物,与砷(As)的硫化物和氧化物共存.微生物对土壤中重金属的迁移转化及修复具有重要意义.目前,锑矿不同功能分区(采矿区和冶炼区)中重金属有效态对土壤微生物群落结构的生态效应仍知之甚少.为掌握不同功能分区中重金属污染特征及重金属有效态与土壤微生物群落之间的相互作用关系,采用Wenzel连续提取法和1.S r DNA高通量测序技术测定了Sb和As的化学形态及微生物信息.结果表明,Wenzel连续提取后Sb和As的化学形态分布占比大小为:无定型铁铝氧化物结合态(F3)>晶质铁铝氧化物结合态(F4)>残渣态(F5)>专性吸附态(F2.>非专性吸附态(F1..潜在生态风险指数(RI)和地累积指数(Igeo)显示,Sb污染程度大小为:冶炼区>采矿区>对照区,冶炼区为严重污染,采矿区为中度至重度污染;As污染程度大小为:采矿区>冶炼区>对照区,采矿区和冶炼区均为中度至重度污染.1.S r DNA高通量测序显示:Proteobacteria是采矿区与冶炼区中相对丰度最高的门,Kaistobacter、Pseudomonas、Sphingomonas和Lysobacter是采矿区与冶炼区中相对丰度最高的属;Geobacter和Luteolibacter在采矿区有较高的LDA得分,Thiobacillus在冶炼区具有较高的LDA得分.Spearman相关性、方差分解(VPA)和随机森林预测(RF)表明,Sb、As、有效态锑[Sb(Bio)]和有效态砷[As(Bio)]是影响锑矿不同功能分区中微生物群落结构的主要因子;冗余分析(RDA)显示,对属水平微生物群落结构的影响大小为:As(Bio)>Sb(Bio)>Sb>As,Sb及Sb(Bio)和Nitrospira呈现显著负相关关系,和Thiobacillus呈现显著正相关关系(P<0.05).通过深入研究重金属污染特征及重金属有效态对微生物群落结构的生态效应,可为锑矿区生态修复和生态环境管理提供参考.

关键词：锑(Sb)矿区 Wenzel连续提取法生态风险评估微生物群落分析 1.S rDNA高通量测序

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H5N1.禽流感病毒广谱中和单克隆抗体的筛选及其中和机制初步研究

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生物化学与生物物理进展 2011年第6期38卷 519-527页

作者：张晓曾晓燕刘哲金秋徐言冯振卿焦永军南京医科大学卫生部抗体技术重点实验室南京210029 江苏省疾病预防控制中心卫生部肠道病原微生物重点实验室南京210009

利用杆状病毒-昆虫细胞表达H5N1.禽流感病毒的血凝素蛋白(HA),纯化后的重组蛋白HA免疫小鼠并制备杂交瘤单克隆抗体,用H5N1.禽流感病毒的全病毒进行筛选,成功地获得了抗H5N1.禽流感病毒血凝素蛋白HA的单抗.MDCK细胞微量中和试验表明,... 详细信息

利用杆状病毒-昆虫细胞表达H5N1.禽流感病毒的血凝素蛋白(HA),纯化后的重组蛋白HA免疫小鼠并制备杂交瘤单克隆抗体,用H5N1.禽流感病毒的全病毒进行筛选,成功地获得了抗H5N1.禽流感病毒血凝素蛋白HA的单抗.MDCK细胞微量中和试验表明,单抗8G1.D7可对clade2.clade9的H5N1.禽流感病毒起中和作用.Western-blot及血凝抑制实验进一步证明了该单抗的结合位点位于HA蛋白的HA1.基上.鸡胚感染病毒预防试验结果表明,8G1.D7对禽来源的和人来源的H5N1.禽流感病毒均可达到1.0%的保护率;在治疗试验组中,8G1.D7对禽来源的病毒感染具有较高的保护率,可达1.0%,对人来源的H5N1.禽流感病毒最高也可达87.5%的保护率.该抗体的获得不仅为H5N1.高致病性禽流感病毒的预防和治疗带来了希望,同时其中和位点的发现也为以后亚单位疫苗的研制提供新的思路.

关键词： H5N1.禽流感病毒杆状病毒.昆虫细胞表达系统单克隆抗体微量中和半数细胞培养物感染量血凝抑制

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Hypoxia-induced catecholamine secretion in rat hippocampus in vivo

Hypoxia-induced catecholamine secretion in rat hippocampus i...

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中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Mu jin~(1,2.,Lei zhang~(1,2.,Yu MU~(1,2. Xin-Jiang KANG~1,Shi-Rong WANG~1,Wei YAO~1,jing LV~1,Hai-Qian DOU~1,jin-Li GU~1, Qian LEI~(1,2.,Pan-Li ZUO~1,xiao-Yu zhang~1,Juan FAN~1,Hua-Dong XU~1,Claire Xi zhang~1,Li-Huan LI~2.Zhuan ZHOU~(1,*) 1 institute of Molecule Medicine,Peking University,Beijing 100871,china 2.Fuwai Hospital,Peking Union Medical College,Beijing 100005,china

＜正＞The brain of anesthesia patients is often damaged by stroke-induced hypoxia during surgeries aided with artificial *** present there is no way to real-time report the oxygen/hypoxia status in the brain during the anesthesia *** we report that dopamine signaling measured by electrochemical amperometry is a sensitive indicator in rat brain under *** full anesthesia,hypoxia triggered reproducible amperometric signals in both hippocampus and ***,a blocker of dopamine transporter,potentiated the amperometric signals,indicating that hypoxia-induced catecholamine secretion（HICS） is responsible for at least part of the amperometric *** signals were dramatically blocked simply by lowering temperature from 37℃to 32.,suggesting hypothermal treatment may effectively protect brain from severe hypoxia during anesthesia and surgical *** the other hand,the popular anesthetics propofol decreased the amplitude of HICS,while ketamine was no effect,suggesting propofol may have a nature of partially brain *** contrast,hypertension enhanced HICS signals significantly,implicating hypertension may deteriorate the brain damage induced by *** conclusion,amperometric recording of HICS might be a novel method to monitor hypoxia/oxygen status during anesthesia and surgical operation.

关键词： Hypoxia catecholamine release in vivo hippocampus

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