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Observation of spectral lines in the exceptional GrB 221009A

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science china(physics,Mechanics & Astronomy) 2024年第8期67卷 187-206页

作者： Yan-Qiu Zhang Shao-lin xiong Ji-rong Mao Shuang-Nan Zhang Wang-Chen Xue Chao Zheng Jia-Cong liu Zhen Zhang xi-Lu Wang {4.-Yu Ge Shu-Xu Yi li-{4. Song Zheng-Hua An Ce Cai xin-Qiao li Wen-xi peng Wen-Jun Tan Chen-Wei Wang xiang-Yang Wen Yue Wang Shuo xiao Fan Zhang peng Zhang Shi-Jie Zheng Key Laboratory of particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of Chinese Academy of sciences Beijing 100049China Yunnan Observatories Chinese Academy of SciencesKunming 650011China Center for Astronomical Mega-science Chinese Academy of SciencesBeijing 100012China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China college of physics and Hebei Key Laboratory of photophysics research and Application Hebei Normal UniversityShijiazhuang 050024China Guizhou provincial Key Laboratory of radio Astronomy and Data processing Guizhou Normal UniversityGuiyang 550001China college of Electronic and information Engineering Tongji UniversityShanghai 201804China

As the brightest gamma-ray burst ever observed,GrB 221009A provided a precious opportunity to explore spectral line *** this article,we performed a comprehensive spectroscopy analysis of GrB 221009A jointly with GECAM-C and Fermi/GBM data to search for emission and absorption *** the first time we investigated the line feature throughout this GrB including the most bright part where many instruments suffered problems,and identified prominent emission lines in multiple time *** central energy of the Gaussian emission line evolves from about 37 to 6 MeV,with a nearly constant ratio(about 10%)between the line width and central ***,we find that both the central energy and the energy flux of the emission line evolve with time as a power law decay with power law index of–1 and–2,*** suggest that the observed emission lines most likely origin from the blue-shifted electron positron pair annihilation 511 ke V *** find that a standard high latitude emission scenario cannot fully interpret the observation,thus we propose that the emission line comes from some dense clumps with electron positron pairs traveling together with the *** this scenario,we can use the emission line to directly,for the first time,measure the bulk Lorentz factor of the jet(Γ)and reveal its time evolution(i.e.,Γ~t^(-1))during the prompt ***,we find that the flux of the annihilation line in the co-moving frame keeps *** discoveries of the spectral line features shed new and important lights on the physics of GrB and relativistic jet.

关键词： GrB GrB 221009A emission line

Stepped-up development of accelerator mass spectrometry method for the detection of ^(60)Fe with the HI-13 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 {4.-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 Institute 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-13tandem accelerator at the china Institute of Atomic Energy(CIAE).Since interferences could not be sufficiently removed solely with the e{4.sting magnetic systems of the tandem accelerator and the following Q3D magnetic spectrograph,a Wien filter with a ma{4.mum voltage of±60 kV and a ma{4.mum 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 1μm 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 1.125×10^(-10)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 4.3.10^(-14.based on blank sample measurements lasting 5.8 h,and the sensitivity could,in principle,be expected to be appro{4.mately 2.5×10^(-15)when the data were accumulated for 100 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

Achievements and challenges of primate conservation in china

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Zoological research(Diversity and Conservation) 2024年第1期1卷 66-74页

作者： Bao-Guo li He Zhang ming li Xue-Long Jiang peng-Fei Fan Jiang Zhou Song-Tao Guo xiao-Guang Qi Jin-Hua li Ji-Qi Lu Dong-po xia liang-Wei Cui Zuo-Fu xiang Qi-Hai Zhou Zhi-pang Huang Cheng-ming Huang Wen xiao Hui-Jian Hu Zhi-xin Zhou ming-yong Chen Da-yong li peng-Lai Fan Yin Yang ru-liang pan shaanxi Key Laboratory for Animal Conservation College of Life SciencesNorthwest UniversityXi’anShaanxi 710069China Jiangxi provincial Key Laboratory of Conservation Biology College of ForestryJiangxi Agricultural UniversityNanchangJiangxi 330045China Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Genetic resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650201China School of life sciences Sun Yat-sen UniversityGuangzhouGuangdong 510275China School of Karst science Guizhou Normal UniversityGuiyangGuizhou 550025China International Collaborative research Center for Huangshan Biodiversity and Tibetan Macaque Behavioral Ecology Anhui UniversityHefeiAnhui 230601China Institute of Biodiversity and Ecology Zhengzhou UniversityZhengzhouHenan 450001China Key Laboratory for Conserving Wildlife with Small populations in Yunnan Southwest Forestry UniversityKunmingYunnan 650224China college of life sciences and Technology Central South University of Forestry and TechnologyChangshaHunan 410004China Key Laboratory of Ecology of rare and Endangered Species and Environmental protection(Ministry of Education) Guangxi Normal UniversityGuilinGuangxi 541004China International Centre of Biodiversity and primate Conservation Centre Dali UniversityDaliYunnan 671003China Guangdong Key Laboratory of Animal Conservation and resource Utilization Institute of ZoologyGuangdong Academy of SciencesGuangzhouGuangdong 510663China School of life sciences Yunnan UniversityKunmingYunnan 650500China Key Laboratory of Southwest china Wildlife resources Conservation(Ministry of Education) China West Normal UniversityNanchongSichuan 637001China Institute of International rivers and Eco-security Yunnan UniversityKunmingYunnan 650500China School of Human sciences The University of Western AustraliaPerthWA 6009Australia

The dual impact of climate change and human activities has precipitated a sharp decline in primate biodiversity *** is home to the most diverse primate species in the Northern hemisphere,which face severe ecological threats due to the expansion of modern agriculture,extensive exploitation and consumption of natural resources,and excessive land development during its transition from an agricultural to a modern *** response,china has implemented various ecological conservation measures,including habitat restoration and *** efforts have made substantial strides in biodiversity conservation,with certain regions witnessing an increase in primate *** the current study,we conducted a systematic review of historical documents and field research data related to Chinese primates,evaluating the endangered status of primate species in *** improvements in the habitats of most primate species and some population growth,many species still face severe threats,including declining and small *** such as the Myanmar snub-nosed monkey(rhinopithecus strykeri),eastern black crested gibbon(Nomascus nasutus),and Hainan gibbon(***)remain particularly vulnerable due to their limited distribution ranges and extremely small *** scientific data,fragmented information,and not enough studies in conservation biology further compound the ***,there is a notable lack of detailed population monitoring data for species such as the Bengal slow loris(Nycticebus bengalensis),pygmy slow loris(***),Indochinese gray langur(Trachypithecus crepusculus),Shortridge’s langur(***),and capped langur(***),which hinders the development of practical and targeted conservation management ***,for national biodiversity conservation,there is an urgent need for specialized primate surveys,enhancing habitat protection and restoration,and increasing focus on cross-border conse

关键词： primates Biodiversity Habitat fragmentation Habitat restoration Conservation strategies

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计量逻辑学中的收敛理论

计算机工程与应用 2009年第30期45卷 4-5,12页

作者：韩邦合李永明陕西师范大学数学与信息科学学院西安710062 西安电子科技大学理学院数科系西安710126 陕西师范大学计算机科学学院西安710062

初步给出了计量逻辑学中的收敛理论。提出了逻辑度量空间中的度量收敛,赋值收敛和网收敛概念,对它们做出刻画并初步论证了它们之间的关系。

关键词：真度相似度伪度量度量收敛赋值收敛网收敛计量逻辑学近似推理

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区间值三角模左连续的充要条件

山东大学学报（理学版） 2009年第3期44卷 67-70页

作者：宋佳罗敏楠李永明陕西师范大学数学与信息科学学院陕西西安710062

基于定向偏序集理论给出了区间值三角模左连续的充要条件,证明了区间值三角模左连续当且仅当该三角模保定向并。

关键词：区间值三角模定向集左连续

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

Gene expression profiling of the whitefly （Bemisia tabaci） Middle East- Asia Minor 1 feeding on healthy and Tomato yellow leaf curl china virus-infected tobacco

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Insect science 2011年第1期18卷 11-22页

作者： Jun-Min li yong-ming ruan Fang-Fang li Shu-Sheng liu xiao-Wei Wang Ministry of Agriculture Key Laboratory of Molecular Biology of Crop pathogens and Insects Institute of Insect Sciences Zhejiang University Hangzhou college of Chemistry and life sciences Zhejiang Normal University Jinhua Zhejiang Province China

Begomoviruses are exclusively transmitted by whitefly （Bemisia tabaci） in a circulative, non-propagative manner. The influences of begomoviruses on whitefly vector are complex with both direct and indirect effects. However, the molecular mechanisms underlying these effects are poorly understood and the transcriptional profiles of whitefly on healthy and virus-infected plants have not yet been studied. Using suppression subtractive hybridization, we investigated the differentially expressed genes in whitefly Middle East - Asia Minor 1 feeding on healthy and Tomato yellow leaf curl china virus （TYLCCNV） infected tobacco. From the forward cDNA library, 124.differentially expressed expression sequence tags （ESTs） were obtained which represent up-regulated genes in the whiteflies feeding on the infected tobacco. From the reverse library, 112 ESTs were isolated which represent down-regulated genes. Among the up-regulated genes, we identified several genes that are probably involved in direct interaction between whitefly and TYLCCN~, including a 26/29-kDa proteinase that appears to participate in the elimination of foreign proteins, heparan sulfate proteoglycan which mediates the entry of several viruses into host cells and two genes of rickettsia-a secondary endosymbiotic bacterium of whitefly. In addition, we identified a number of genes involved in metabolism, transcription and translation which might be the result of indirect effects of TYLCCNV on the whitefly via host plants. Collectively, our results suggest that TYLCCNV-infected tobacco changes the gene expression profiles of whitefly via both direct and indirect interactions. This study revealed a number of genes involved in whitefly-TYLCCNV-tobacco interactions and provided useful information for future study on this complex system.

关键词： begomovirus Bemisia tabaci suppression subtractive hybridization Tomatoyellow leaf curl china virus whitefly

Facile and Cost-Efficient Synthesis of photovoltaic polymers via Direct Arylation Coupling

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Chinese Journal of polymer science 2023年第11期41卷 1663-1685,I0004页

作者： xiao-Chen Wang Yuan Zhang Jia-xin Yang Jin-Jun Shao ming-Feng Wang yong-Fang {4. School of Materials science and Engineering Shaanxi Normal UniversityXi'an 710119China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) School of Flexible Electronics(Future Technologies)Nanjing Tech UniversityNanjing 211816China School of science and Engineering The Chinese University of Hong KongShenzhen 518172China Beijing National Laboratory for Molecular sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

As the high calibre candidate of lightweight and flexible solar cells,polymer solar cells(pSCs)have made tremendous progress in recent ***,the active photovoltaic materials in pSCs are mainly synthesized by metal-mediated coupling reaction requiring harsh reaction conditions,multiple-step synthesis,and cumbersome purification,which is not cost-efficient and may bring toxicity *** is not favorable to the production of photovoltaic polymers and pSC devices on a large scale,and therefore unsuitable for the pSCs *** arylation coupling reaction via aromatic C―H bonds activation enables the synthesis of conjugated polymers under mild conditions and simultaneously reduces synthetic steps,difficulty,and toxic reaction *** review provides an overview of the history of preparing representative photovoltaic polymers utilized in pSCs through direct arylation reactions and discusses the activity and selectivity of C―H bonds in typical building blocks under different reaction ***,the impact of direct arylation condition on defect formation and photovoltaic performance of the photovoltaic polymers is addressed and compared with conventional Stille coupling methods.

关键词： photovoltaic polymers Direct arylation coupling C―H bonds activation polymer solar cells(pSCs) Organic solar cells(OSCs) Low-cost

Hierarchical polygamy Inequality for Entanglement of Tsallis q-Entropy

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Communications in Theoretical physics 2018年第5期69卷 532-536页

作者： Yu Luo yong-ming li college of Computer science Shaanxi Normal UniversityXi'an 710062China Centre for Quantum Software and information(UTS:Q|SI>) Faculty of Engineering and Information TechnologyUniversity of Technology SydneyAustralia

In this paper, we study the polygamy inequality of quantum entanglement in terms of Tsallis *** first give a lower bound of Tsallis q-entropy entanglement of assistance(TOA) in the 2  d systems. The relationships between Tsallis q-entropy entanglement(TEE) and TOA are also given. Furthermore, we prove TOA follows a hierarchical polygamy inequality in a 2  2  2^(N-2) systems.

关键词： polygamy entanglement Tsallis q-entropy