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Stretchable,Transparent,and Ultra-Broadband Terahertz Shielding Thin Films Based on Wrinkled MXene Architectures

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Nano-Micro Letters 2024年第9期16卷 110-122页

作者： Shaodian Yang Zhiqiang Lin Ximiao wang Junhua huang Rongliang Yang Zibo Chen Yi Jia Zhiping Zeng Zhaolong Cao Hongjia Zhu Yougen Hu Enen Li Huanjun Chen Tianwu wang Shaozhi Deng Xuchun Gui State key laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China National key laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic MaterialsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Guangdong Province key laboratory of Display Material and technology Guangzhou 510275People’s Republic of China China Academy of Aerospace science and Innovation Beijing 100176People’s Republic of China school of Materials science and Engineering Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China GBA Branch of Aerospace information Research Institute Chinese Academy of SciencesGuangzhou 510700People’s Republic of China school of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049People’s Republic of China Guangdong Provincial key laboratory of Terahertz Quantum Electromagnetics Guangzhou 510700People’s Republic of China

With the increasing demand for terahertz(THz)technology in security inspection,medical imaging,and flexible electronics,there is a significant need for stretchable and transparent THz electromagnetic interference(EMI)shielding *** EMI shielding materials,like opaque metals and carbon-based films,face challenges in achieving both high transparency and high shielding efficiency(SE).Here,a wrinkled structure strategy was proposed to construct ultra-thin,stretchable,and transparent terahertz shielding MXene films,which possesses both isotropous wrinkles(height about 50 nm)and periodic wrinkles(height about 500 nm).Compared to flat film,the wrinkled MXene film(8 nm)demonstrates a remarkable 3..5%increase in SE within the THz *** wrinkled MXene film exhibits an EMI SE of 21.1 dB at the thickness of 100 nm,and an average EMI SE/t of 700 dBμm^(−1)over the 0.1-10 *** calculations suggest that the wrinkled structure enhances the film’s conductivity and surface plasmon resonances,resulting in an improved THz wave ***,the wrinkled structure enhances the MXene films’stretchability and *** bending and stretching(at 3.%strain)cycles,the average THz transmittance of the wrinkled film is only 0.5%and 2.4.,*** outstanding performances of the wrinkled MXene film make it a promising THz electromagnetic shielding materials for future smart windows and wearable electronics.

关键词： Terahertz Wrinkle structure Electromagnetic interference shielding MXene

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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

Molecular phylogenetic analyses based on the complete plastid genomes and nuclear sequences reveal Daphne(Thymelaeaceae)to be non-monophyletic as current circumscription

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Plant Diversity 2022年第3期44卷 279-289页

作者： Shiou Yih Lee Ke-wang Xu Cui-Ying huang Jung-Hyun Lee Wen-Bo Liao yong-Hong Zhang Qiang Fan State key laboratory of Biocontrol and Guangdong Provincial key laboratory of Plant Resources School of Life SciencesSun Yat-sen University510275GuangzhouChina Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentKey Laboratory of State Forestry and Grassland Administration on Subtropical Forest Biodiversity ConservationNanjing Forestry University219937NanjingChina Department of Biology Education Chonnam National University61186GwangjuRepublic of Korea school of Life sciences Yunnan Normal University650001KunmingChina Faculty of Health and Life sciences INTI International University71800NilaiMalaysia

The diverse members of the genus Daphne are prized for their fragrant *** being promising ornamental plants in many countries,genetic information of Daphne is *** this study,the plastomes of four species and one variety of Daphne were sequenced and *** plastomes were typical and contained a pair of inverted repeat(IR)regions that separated the large single-copy(LSC)region from the small single-copy(SSC)*** a length ranging from 13.,869 bp(***)to 174.773.bp(***),106 to 14. genes were *** plastome analysis of the newly sequenced plastomes with four publicly available Daphne plastomes identified an expansion of the IRs,sequence variations,and mutational *** analyses indicated that the genus Daphne in its current circumscription is *** genkwa was nested within the genus Wikstroemia,while *** was well resolved as sister to *** findings concurred with results from our study that used nuclear ribosomal internal transcribed spacer sequence *** conflicts on the molecular placement of *** and *** and the present taxonomic classification in Daphne suggest that a new intergeneric classification system of Daphneae warrants consideration.

关键词： Daphneae Comparative plastome analysis Internal transcribed spacer region Polyphyletic relationship Wikstroemia

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On the selection of solutions for mutation in differential evolution

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Frontiers of Computer science 2018年第2期12卷 297-315页

作者： yong wang Zhi-Zhong LIU Jianbin LI Han-Xiong LI Jiahai wang school of information science and Engineering Central South University Changsha 410083 China school of Computer science and Informatics De Montfort University Leicester LE1 9BH UK Institute of information security and Big Data Central South University Changsha 410083 China Department of Systems Engineering and Engineering Management City University of Hong Kong Hong Kong China State key laboratory of High Performance Complex Manufacturing Central South University Changsha 410083 China school of Data and Computer science Sun Yat-sen University Guangzhou 510006 China

Differential evolution （DE） is a kind of evolutionary algorithms, which is suitable for solving complex optimization problems. Mutation is a crucial step in DE that generates new solutions from old ones. It was argued and has been commonly adopted in DE that the solutions selected for mutation should have mutually different indices. This restrained condition, however, has not been verified either theoretically or empirically yet. In this paper, we empirically investigate the selection of solutions for mutation in DE. From the observation of the extensive experiments, we suggest that the restrained condition could be relaxed for some classical DE versions as well as some advanced DE variants. Moreover, relaxing the restrained condition may also be useful in designing better future DE algorithms.

关键词： differential evolution mutation the selection of solutions for mutation evolutionary algorithms

Evaluation of extreme precipitation based on satellite retrievals over China

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Frontiers of Earth science 2018年第4期12卷 846-861页

作者： Xuerongzi huang Dashan wang Yu LIU Zhizhou FENG Dagang wang Department of Water Resources and Environment Sun Yat-sen UniversityGuangzhou 510275China key laboratory of Water Cycle and Water security in Southern China of Guangdong Higll Education Institute "Sun Yat-sen UniversityGuangzhou 510275China Center of Integrated Geographic information Analysis School of Geography and PlanningSun Yat-sen UniversityGuangzhou 510275China

The objective of this study is to evaluate satellite precipitation extremes of the Tropical Rainfall Measuring Mission (TRMM) 3.4. Version 7 product over China during the period of 2009-2013. Eight extreme indices are used to characterize precipitation extremes: monthly maximum 1-day precipitation (RX1day), monthly maximum consecutive 2-day precipitation (RX2day), monthly maximum 5-day consecutive precipitation (RX5day), simple daily intensity index (SDII), annual total precipitation amount for the wet days (PRCPTOT), annual wet days (R1), consecutive dry days (CDD), and consecutive wet days (CWD). The precipitation amount for indices RX1day, RX2day, RX5day, and PRCPTOT is well captured by TRMM 3.4.-V7, as verified by lower mean relative bias and normalized root mean square error and the high spatial correlation coefficient. In contrast, the performance of TRMM 3.4.-V7 in depicting the indices on intensity and duration (i.e., SDII, R1, CDD, and CWD) is not as good as its performance in depicting the precipitation amount indices. TRMM 3.4.-V7 can reproduce extreme indices better in eastern China than in western China, and better in summer than in winter. Probability density function is also calculated better for RX1day, RX2day, RX5day, and PRCPTOT than for SDII, R1, CDD, and CWD. Investigation on the monthly time series of RX1day, RX2day, and RX5day at different spatial scales indicates that TRMM 3.4.-V7 performs better at the large spatial scale than at the grid cell scale. Caution should be observed when the satellite-based extreme indices are used.

关键词： satellite extreme precipitation TRMM China

Evidence for particle acceleration approaching PeV energies in the W51 complex

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science Bulletin 2024年第18期69卷 2833-2841页

作者： LHAASO Collaboration Zhen Cao F.Aharonian Axikegu Y.X.Bai Y.W.Bao D.Bastieri X.J.Bi Y.J.Bi W.Bian A.V.Bukevich Q.Cao W.Y.Cao Zhe Cao J.Chang J.F.Chang A.M.Chen E.S.Chen H.X.Chen Liang Chen Lin Chen Long Chen M.J.Chen M.L.Chen Q.H.Chen S.Chen S.H.Chen S.Z.Chen T.L.Chen Y.Chen N.Cheng Y.D.Cheng M.Y.Cui S.W.Cui X.H.Cui Y.D.Cui B.Z.Dai H.L.Dai Z.G.Dai Danzengluobu X.Q.Dong K.K.Duan J.H.Fan Y.Z.Fan J.Fang J.H.Fang K.Fang C.F.Feng H.Feng L.Feng S.H.Feng X.T.Feng Y.Feng Y.L.Feng S.Gabici B.Gao C.D.Gao Q.Gao W.Gao W.K.Gao M.M.Ge L.S.Geng G.Giacinti G.H.Gong Q.B.Gou M.H.Gu F.L.Guo X.L.Guo Y.Q.Guo Y.Y.Guo Y.A.Han M.Hasan H.H.He H.N.He J.Y.He Y.He Y.K.Hor B.W.Hou C.Hou X.Hou H.B.Hu Q.Hu S.C.Hu D.H.huang T.Q.huang W.J.huang X.T.huang X.Y.huang Y.huang X.L.Ji H.Y.Jia K.Jia K.Jiang X.W.Jiang Z.J.Jiang M.Jin M.M.Kang I.Karpikov D.Kuleshov K.Kurinov B.B.Li C.M.Li Cheng Li Cong Li D.Li F.Li H.B.Li H.C.Li Jian Li Jie Li K.Li S.D.Li W.L.Li W.L.Li X.R.Li Xin Li Y.Z.Li Zhe Li Zhuo Li E.W.Liang Y.F.Liang S.J.Lin B.Liu C.Liu D.Liu D.B.Liu H.Liu H.D.Liu J.Liu J.L.Liu M.Y.Liu R.Y.Liu S.M.Liu W.Liu Y.Liu Y.N.Liu Q.Luo Y.Luo H.K.Lv B.Q.Ma L.L.Ma X.H.Ma J.R.Mao Z.Min W.Mitthumsiri H.J.Mu Y.C.Nan A.Neronov L.J.Ou P.Pattarakijwanich Z.Y.Pei J.C.Qi M.Y.Qi B.Q.Qiao J.J.Qin A.Raza D.Ruffolo A.Sáiz M.Saeed D.Semikoz L.Shao O.Shchegolev X.D.Sheng F.W.Shu H.C.Song Yu.V.Stenkin V.Stepanov Y.Su D.X.sun Q.N.sun X.N.sun Z.B.sun J.Takata P.H.T.Tam Q.W.Tang R.Tang Z.B.Tang W.W.Tian C.wang C.B.wang G.W.wang H.G.wang H.H.wang J.C.wang Kai wang Kai wang L.P.wang L.Y.wang P.H.wang R.wang W.wang X.G.wang X.Y.wang Y.wang Y.D.wang Y.J.wang Z.H.wang Z.X.wang Zhen wang Zheng wang D.M.Wei J.J.Wei Y.J.Wei T.Wen C.Y.Wu H.R.Wu Q.W.Wu S.Wu X.F.Wu Y.S.Wu S.Q.Xi J.Xia G.M.Xiang D.X.Xiao G.Xiao Y.L.Xin Y.Xing D.R.Xiong Z.Xiong D.L.Xu R.F.Xu R.X.Xu W.L.Xu L.Xue D.H.Yan J.Z.Yan T.Yan C.W.Yang C.Y.Yang F.Yang F.F.Yang L.L.Yang M.J.Yang R.Z.Yang W.X.Yang Y.H.Yao Z.G.Yao L.Q.Yin N.Yin X.H.You Z.Y.You Y.H.Yu Q.Yuan H.Yue H.D.Zeng T.X.Zeng W.Zeng M.Zha B.B.Zhang F.Zhang H.Zhang 不详 key laboratory of Particle Astrophysics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of Chinese Academy of sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduChina Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 103980Heidelberg 69029Germany school of Physical science and technology&school of {4. science and technology Southwest Jiaotong UniversityChengdu 610031China school of Astronomy and Space science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Tsung-Dao Lee Institute&school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Institute for Nuclear Research of Russian Academy of sciences Moscow 117312Russia Hebei Normal university Shijiazhuang 050024China university of science and technology of China Hefei 230026China State key laboratory of Particle Detection and Electronics China key laboratory of Dark Matter and Space Astronomy&key laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Research Center for Astronomical Computing Zhejiang LaboratoryHangzhou 311121China key laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China school of Physics and Astronomy Yunnan UniversityKunming 650091China key laboratory of Cosmic Rays(Tibet university) Ministry of EducationLhasa 850000China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of Physics and Astronomy(Zhuhai)&school of Physics(guangzhou)&Sino-French Institute of Nuclear Engineering and {3.(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275GuangdongChina Institute of Frontier and Interdisciplinary science Shandong UniversityQingdao 266237China APC UniversitéParis Cité

Theγ-ray emission from the W51 complex is widely acknowledged to be attributed to the interaction between the cosmic rays(CRs)accelerated by the shock of supernova remnant(SNR)W51C and the dense molecular clouds in the adjacent star-forming region,***,the maximum acceleration capability of W51C for CRs remains *** on observations conducted with the Large High Altitude Air Shower Observatory(LHAASO),we report a significant detection ofγrays emanating from the W51 complex,with energies from 2 to 200 *** LHAASO measurements,for the first time,extend theγ-ray emission from the W51 complex beyond 100 TeV and reveal a significant spectrum bending at tens of *** combining the"π^(0)-decay bump"featured data from Fermi-LAT,the broadbandγ-ray spectrum of the W51 region can be well-characterized by a simple pp-collision *** observed spectral bending feature suggests an exponential cutoff at~4.0 TeV or a power-law break at~200 TeV in the CR proton spectrum,most likely providing the first evidence of SNRs serving as CR accelerators approaching the PeV ***,two young star clusters within W51B could also be theoretically viable to produce the most energeticγrays observed by *** findings strongly support the presence of extreme CR accelerators within the W51 complex and provide new insights into the origin of Galactic CRs.

关键词： UHE c-ray Cosmic rays SNR W51C Star clusters

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A flexible and stretchable bionic true random number generator

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Nano Research 2022年第5期15卷 4448-4456页

作者： yongbiao Wan Kun Chen Feng huang Pidong wang Xiao Leng Dong Li Jianbin Kang Zhiguang Qiu Yao Yao Microsystem and Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China school of Electronics and information technology State Key Lab of Opto-Electronic Materials&TechnologiesGuangdong Province Key Lab of Display Materials and TechnologiesSun Yat-sen UniversityGuangzhou 510275China

The volume of securely encrypted data transmission increases continuously in modern society with all things *** this end,true random numbers generated from physical sources are highly required for guaranteeing security of encryption and decryption schemes for exchanging sensitive ***,majority of true random number generators(TRNGs)are mechanically rigid,and thus cannot be compatibly integrated with some specific flexible ***,we present a flexible and stretchable bionic TRNG inspired by the uniqueness and randomness of biological *** flexible TRNG film is molded from the surface microstructures of natural plants(e.g.,ginkgo leaf)via a simple,low-cost,and environmentally friendly manufacturing *** our proof-of-principle experiment,the TRNG exhibits a fast generation speed of up to 1.04.Gbit/s,in which random numbers are fully extracted from laser speckle patterns with a high extraction rate of 72%.Significantly,the resulting random bit streams successfully pass all randomness test suites including NIST,TestU01,and *** after 10,000 times cyclic stretching or bending tests,or during temperature shock(-25-80℃),the bionic TRNG still reveals robust mechanical reliability and thermal *** a flexible TRNG shows a promising potential in {3. security of emerging flexible networked electronics.

关键词： random number generator flexible electronics polydimethylsiloxane(PDMS) bionic microstructure information security

Optimization of performance of the KM2A full array using the Crab Nebula

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Chinese Physics C 2024年第6期48卷 169-178页

作者：曹臻 F.Aharonian 安琪阿西克古白云翔包逸炜 D.Bastieri 毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 D.della Volpe 董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮 S.Gabici 高博高川东高林青高启高卫高伟康葛茂茂耿利斯 G.Giacinti 龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰 M.Heller 贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通 D.Kuleshov.K.Kurinov 李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振 W.Mitthumsiri 穆慧君南云程 A.Neronov 区子维庞彬宇 P.Pattarakijwanich 裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffolo A.Sáiz D.Semikoz 邵澄宇邵琅 O.Shchegolev 盛祥东舒富文宋慧超 Yu.V.Stenkin V.Stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 LHAASO Collaboration key laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of Chinese Academy of sciences Beijing 100049China Tianfu Cosmic Ray Research Center Chengdu 610000China Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany State key laboratory of Particle Detection and Electronics China university of science and technology of China Hefei 230026China school of Physical science and technology&school of {4. science and technology Southwest Jiaotong UniversityChengdu 610031China school of Astronomy and Space science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Hebei Normal university Shijiazhuang 050024China key laboratory of Dark Matter and Space Astronomy&key laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-Dao Lee Institute&school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China key laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China key laboratory of Cosmic Rays(Tibet university) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of Physics and Astronomy(Zhuhai)&school of Physics(guangzhou)&Sino-French Institute of Nuclear Engineering and {3.(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China school of Physics and Astronomy Yunnan UniversityKunming 650091China Département de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland Institute of Frontier and Interdisciplinary science Shandong UniversityQingdao 266237China APC Universit'e Paris Cit'eCNRS/IN2P3CEA/IRFUObservat

The full array of the Large High Altitude Air Shower Observatory(LHAASO)has been in operation since July *** its kilometer-square array(KM2A),we optimized the selection criteria for very high and ultrahigh energyγ-rays using data collected from August 2021 to August 2022,resulting in an improvement in significance of the detection in the Crab Nebula of approximately 15%,compared with that of previous *** the implementation of these new selection criteria,the angular resolution was also significantly improved by approximately 10%at tens of *** aspects of the full KM2A array performance,such as the pointing error,were also calibrated using the Crab *** resulting energy spectrum of the Crab Nebula in the energy range of 10-1000 TeV are well fitted by a log-parabola model,which is consistent with the previous results from LHAASO and other experiments.

关键词： γ-ray Crab Nebula significance

Controlled hydrothermal synthesis of ZnO nano and microstructure materials with photocatalytic properties

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Controlled hydrothermal synthesis of ZnO nano and microstruc...