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Doping Effect of Poly(vinylidene fluoride) on Carbon Nanofibers Deduced by thermoelectric Analysis of their Melt Mixed Films

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Chinese journal of Polymer Science 2024年第11期 1802-1810页

作者： A.j.Paleo V.M.Serrato j.M.Mánuel O.toledano E.Mu?oz M.Melle-Franco b.Krause P.P?tschke K.Lozano 2C2t-Centre for textile Science and technology University of Minho Campus de Azurém Florida Institute of technology the Aerospace Corporation Department of Condensed Matter Physics and Institute of Research on Electron Microscopy and Materials(IMEYMAt) Faculty of Sciences University of Cádiz CICECO – Aveiro Institute of Materials Department of Chemistry University of Aveiro UNED-Universidad Nacional de Educación a Distancia Facultad de Física Pontificia Universidad Católica de Chile Leibniz-Institut für Polymerforschung Dresden e.V.IPF Department of Mechanical Engineering University of Texas Rio Grande Valley

the effect of temperature on the electrical conductivity （σ） and Seebeck coefficient （S） of n-type vapor grown carbon nanofibers （CNFs）and poly（vinylidene fluoride）(PVDF) melt-mixed with 15 wt%of those CNFs is *** 40°C,the CNFs show stable n-type character (S=-4.8μV·K-1) with anσof ca.165 S·m-1,while the PVDF/CNF composite film shows anσof ca.9 S·m-1and near-zero S (S=-0.5μV·K-1).this experimental reduction in S is studied by the density functional tight binding （DFtb） method revealing a contact electron transfer from the CNFs to the PVDF in the ***,in the temperature range from 40°C to 100°C,theσ（t） of the CNFs and PVDF/CNF film,successfully described by the 3D variable range hopping （VRH） model,is explained as consequence of a thermally activated backscattering *** the contrary,the S（t）from 40°C to 100°C of the PVDF/CNF film,which satisfactorily matches the model proposed for some multi-walled carbon nanotube （MWCNt）doped mats;however,it does not follow the increase in S（t） found for *** these findings are presented with the aim of discerning the role of these n-type vapor grown carbon nanofibers on theσand S of their melt-mixed polymer composites.

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Harnessing naturally occurring mutations for t-cell therapy:a potential new avenue to enhance treatment efficacy

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Signal transduction and targeted therapy 2024年第5期9卷 1799-1801页

作者： Michael Hiltensperger jürgen Ruland Kilian Schober Mikrobiologisches Institut-Klinische Mikrobiologie Immunologie und HygieneFriedrich-Alexander-Universität Erlangen-NürnbergErlangenGermany Institute of Clinical Chemistry and Pathobiochemistry School of MedicineTechnical University of MunichMunichGermany translatUM Center for Translational Cancer ResearchTechnical University of MunichMunichGermany German Cancer Consortium(DKtK) HeidelbergGermany German Center for Infection Research(DZIF) partner site MunichMunichGermany FAU Profile Center Immunomedicine Friedrich-Alexander-Universität Erlangen-NürnbergErlangenGermany

In a recent study published in Nature,Garcia et *** a sophisticated approach to identify fitness-enhancing mutations for t cells that was inspired by cancer evolution.1 the identified CARD11-PIK3R3 gene fusion enhanced tumor rejection and persistence of engineered t cells in multiple tumor models and might have the potential to improve efficacy of adoptive t-cell therapies in cancer patients.

关键词： cancer potential

Recovery rates of persistent post-COVID-19 olfactory dysfunction using psychophysical assessment:A longitudinal cohort study

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World journal of Otorhinolaryngology-Head and Neck Surgery 2024年第2期10卷 79-87页

作者： jeremy P.tervo Patricia t.jacobson brandon j.Vilarello tiana M.Saak Francesco F.Caruana Liam W.Gallagher joseph b.Gary David A.Gudis Paule V.joseph D.P.Devanand terry E.Goldberg jonathan b.Overdevest Columbia University Vagelos College of Physicians and Surgeons New YorkNew YorkUSA Department of Otolaryngology-Head and Neck Surgery New York-Presbyterian/Columbia University Irving Medical CenterNew YorkNew YorkUSA Department of Otolaryngology-Head and Neck Surgery University of PittsburghPittsburghPennsylvaniaUSA Department of Otolaryngology-Head and Neck Surgery University of MinnesotaMinneapolisMinnesotaUSA National Institute of Alcohol Abuse and Alcoholism Section of Sensory Science and Metabolism&National Institute of Nursing ResearchBethesdaMarylandUSA New York-Presbyterian/Columbia University Irving Medical Center New YorkNew YorkUSA

Objectives:Persistent olfactory dysfunction(OD)following loss of smell associated with SARS-CoV-2 infection is a major feature of long *** on the prevalence of persistent OD predominantly rely on self-reported olfactory *** studies have tracked longitudinal rates of recovery using psychophysical assessment among patients presenting for evaluation of persistent OD beyond a window of acute *** anchored in standardized testing methods are needed to counsel patients who fail to acutely regain their sense of *** study aims to quantify the degree of persistent OD in post-COVID-19 patients who experience subjective and psychophysical ***:We grouped participants presenting for OD evaluation into cohorts based on both subjective and psychophysical olfactory status at a baseline assessment and assessed their olfactory abilities with a visual analogue scale and the Sniffin'Sticks extended test at baseline and 1-year time *** had confirmed a history of COVID-19 by lab evaluation or clinical diagnosis if lab evaluation was not ***:baseline olfactory evaluation was completed by 122 participants,53 of whom completed the 1-year follow-up *** participants presenting with perceived OD,74.5%had confirmed psychophysical OD at baseline,with 55.1%at 1-year *** had reliable trends in self-rated versus psychophysically tested olfactory function at both time *** total threshold,discrimination,and identification(tDI)score improved by+3.25 points in the cohort with psychophysical OD(p=0.0005),with this improvement largely attributable to an increase in median threshold scores(+2.75 points;p=0.0004).Conclusions:OD persists in a significant number of patients who fail to acutely recovery their sense of smell after COVID-19,with many demonstrating lingering deficits at *** in threshold,but not discrimination or identification,most significantly mediate improvement

关键词： long COVID olfaction post-COVID condition smell dysfunction

Attitude control of multi-spacecraft systems on SO(3)with stochastic links failure

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Chinese journal of Aeronautics 2024年第3期37卷 320-331页

作者： KANG Zeyu SHEN Qiang WU Shufan Chris j.DAMAREN MU Zhongcheng School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China Institute for Aerospace Studies University of TorontoTorontoOntario M3H 5T6Canada

In this paper,for Multi-Spacecraft System(MSS)with a directed communication topology link and a static virtual leader,a controller is proposed to realize attitude consensus and attitude stabilization with stochastic links failure and actuator ***,an MSS attitude error model suitable for a directed topology link and with a static virtual leader based on SO(3)is derived,which considers that the attitude error on SO(3)cannot be defined based on algebraic ***,we design a controller to realize the MSS on SO(3)with attitude consensus and attitude stabilization under stochastic links failure and actuator ***,the simulation results of a multi-spacecraft system with stochastic links failure and a static virtual leader spacecraft are demonstrated to illustrate the efficiency of the attitude controller.

关键词： Multi-spacecraft systems Attitude consensus Attitude stabilization Stochastic links failure Super-martingale convergence

Dissection of a rapidly evolving wheat resistance gene cluster by long-read genome sequencing accelerated the cloning of Pm69

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Plant Communications 2024年第1期5卷 69-83页

作者： Yinghui Li Zhen-Zhen Wei Hanan Sela Liubov Govta Valentyna Klymiuk Rajib Roychowdhury Harmeet Singh Chawla jennifer Ens Krystalee Wiebe Valeria bocharova Roi ben-David Prerna b.Pawar Yuqi Zhang Samidha jaiwar Istvan Molnar jaroslav Dolezel Gitta Coaker Curtis j.Pozniak tzion Fahima Institute of Evolution University of HaifaMt.CarmelHaifa 3498838Israel the Department of Evolutionary and Environmental biology University of HaifaMt.CarmelHaifa 3498838Israel the Institute of Plant Protection Sichuan Academy of Agricultural SciencesChengdu 610066China Crop Development Centre and Department of Plant Sciences University of Saskatchewan51 Campus DriveSaskatoonSK S7N 5A8Canada Department of Vegetables and Field Crops Institute of Plant SciencesAgricultural Research Organization(ARO)–Volcani CenterRishon Lezion 7505101Israel Department of Crop Genomics and bioinformatics China Agricultural UniversityBeijing 100094China Institute of Experimental botany of the Czech Academy of Sciences Centre of the Region Hana´for Biotechnological and Agricultural ResearchSlechtitelu 3177900 OlomoucCzech Republic Plant Pathology Department University of CaliforniaDavisDavisCA 95616USA Present address:Department of Plant Science University of ManitobaWinnipegMB R3T 2N2Canada Present address:Agricultural Institute Centre for Agricultural ResearchELKHMartonvasar 2462Hungary

Gene cloning in repeat-rich polyploid genomes remains ***,we describe a strategy for overcoming major bottlenecks in cloning of the powdery mildew resistance gene(R-gene)Pm69 derived from tetraploid wild emmer wheat.A conventional positional cloning approach was not effective owing to suppressed *** sorting was compromised by insufficient purity.A Pm69 physical map,constructed by assembling Oxford Nanopore technology(ONt)long-read genome sequences,revealed a rapidly evolving nucleotide-binding leucine-rich repeat(NLR)R-gene cluster with structural variations.A single candidate NLR was identified by anchoring RNA sequencing reads from susceptible mutants to ONt contigs and was validated by virus-induced gene ***69 is likely a newly evolved NLR and was discovered in only one location across the wild emmer wheat distribution range in ***69 was successfully introgressed into cultivated wheat,and a diagnostic molecular marker was used to accelerate its deployment and pyramiding with other R-genes.

关键词： cluster resistance Israel

由超拍电子伏特加速器产生的超高能伽马射线气泡

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Science bulletin 2024年第4期69卷 449-457页

作者： LHAASO Collaboration Zhen Cao Chuandong Gao Cong Li Ruo-Yu Liu Ruizhi Yang 不详 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 ChengduChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China University of Science and technology of China Hefei 230026China

We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHE)up to a few PeV in the direction of the star-forming region Cygnus X,implying the presence super PeVatron(s)accelerating protons to at least 10 PeV.A log-parabola form with the photon indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 teV)is found fitting the gamma-ray energy spectrum of the bubble *** sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the *** the core of~0.5°,spatially associating with a region containing massive Ob association(Cygnus Ob2)and a microquasar(Cygnus X-3),as well as previously reported multi-teV sources,an enhanced concentration of UHEγ-rays is observed with 2 photons at energies above 1 *** general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium.

关键词： Cosmic rays γ-rays Interstellar medium Star cluster

Determination of the number ofψ(3686)events taken at bESⅢ

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Chinese Physics C 2024年第9期48卷 8-20页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.bai O.bakina I.balossino Y.ban H.-R.bao V.batozskaya K.begzsuren N.berger M.berlowski M.bertani D.bettoni F.bianchi E.bianco A.bortone I.boyko R.A.briere A.brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin j.F.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen H.Y.Chen M.L.Chen S.j.Chen S.L.Chen S.M.Chen t.Chen X.R.Chen X.t.Chen Y.b.Chen Y.Q.Chen Z.j.Chen Z.Y.Chen S.K.Choi G.Cibinetto F.Cossio j.j.Cui H.L.Dai j.P.Dai A.Dbeyssi R.E.de boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori b.Ding X.X.Ding Y.Ding Y.Ding j.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Y.Y.Duan Z.H.Duan P.Egorov Y.H.Fan j.Fang j.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng j.H.Feng Y.t.Feng M.Fritsch C.D.Fu j.L.Fu Y.W.Fu H.Gao X.b.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia L.Ge P.t.Ge Z.W.Ge C.Geng E.M.Gersabeck A.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.t.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.b.Guo M.j.Guo R.P.Guo Y.P.Guo A.Guskov j.Gutierrez K.L.Han t.t.Han F.Hanisch X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold t.Holtmann P.C.Hong G.Y.Hou X.t.Hou Y.R.Hou Z.L.Hou b.Y.Hu H.M.Hu j.F.Hu S.L.Hu t.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang X.t.Huang Y.P.Huang t.Hussain F.Hölzken N.Hüsken N.in der Wiesche j.jackson S.janchiv j.H.jeong Q.ji Q.P.ji W.ji X.b.ji X.L.ji Y.Y.ji X.Q.jia Z.K.jia D.jiang H.b.jiang P.C.jiang S.S.jiang t.j.jiang X.S.jiang Y.jiang j.b.jiao j.K.jiao Z.jiao S.jin Y.jin M.Q.jing X.M.jing t.johansson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk b.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.b.Kolcu b.Kopf M.Kuessner X.Kui N.Kumar A.Kupsc W.Kühn j.j.Lane P.Larin L.Lavezzi t.t.Lei Z.H.Lei M.Lellmann t.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.b.Li H.j.Li H.N.Li Hui Li j.R.Li j.S.Li Ke Li L.j.Li L.K.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.X.Li R.Li S.X.Li t.Li W.D.Li W.G.Li X.Li X.H.Li X.L.Li X.Z.Li Xi Institute of High Energy Physics Beijing 100049China beihang University Beijing 100191China bochum Ruhr-University D-44780BochumGermany budker Institute of Nuclear Physics Sb RAS(bINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSAtS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and technology Luoyang 471003China Henan University of technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati (A)INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara (A)INFN Sezione di FerraraI-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DArica 1000000Chile jilin University Changchun 130012China joha

the number ofψ(3686)events collected by the bESⅢdetector during the 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)hadronic *** uncertainty is systematic and the statistical uncertainty is ***,the numbers ofψ(3686)events collected during the 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,*** numbers are consistent with the previous measurements within one standard *** total number ofψ(3686)events in the three data samples is(2712.4±14.3)×10~6.

关键词： ψ(3686) inclusive process Hadronic events bESⅢdetector

Universal silicon ring resonator for error-free transmission links

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Photonics Research 2024年第4期12卷 701-711页

作者： jUNbO ZHU WEIWEI ZHANG KE LI bHARAt PANt MARtIN EbERt XINGZHAO YAN MEHDI bANAKAR DEHN t.tRAN CALLUM G.LIttLEjOHNS FUWAN GAN GRAHAM REED DAVID j.t.OMSON Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Peng Cheng Laboratory ShenzhenChina

We report the design, fabrication, and characterization of a universal silicon PN junction ring resonator for C band error-free communication links operated up to 50 Gb/s with co-designed optical modulation and detection performance. the universal p-n junction ring device shows co-designed detection responsivity up to 0.84 A/W, in conjunction with a modulation efficiency of -4 V·mm and>8 d b optical modulation extinction ratio, enabling C band 50 Gb/s NRZ communication link with a bit error rate≤3×10^(-12).

关键词： Gb/s resonator communication

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.t.kata 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 Information 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 technology(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~400 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