检索结果-南通市图书馆

维普期刊数据库

Atomistic Investigation of Shock-Induced Amorphization within micro-shear Bands in hexagonal Close-Packed Titanium

在线全文

学校读者我要写书评

暂无评论

Acta metallurgica Sinica(English Letters) 2024年第9期37卷 1590-1600页

作者： Z.C.meng K.G.Wang T.Ali D.Li C.G.bai D.S.xu S.J.Li A.h.Feng G.J.Cao J.h.Yao q.B.Fan h.Wang r.Yang Institute of metal research Chinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Interdisciplinary Centre for Additive manufacturing(ICAm) School of Materials and ChemistryUniversity of Shanghai for Science and TechnologyShanghai 200093China School of materials Science and Engineering Tongji UniversityShanghai 201804China Key Laboratory for Light-Weight materials Nanjing Tech UniversityNanjing 210009China National Key Laboratory of Science and Technology on materials Under Shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401135China

The mechanical response of a single crystal titanium sample against(0001)α surface impact was investigated using molecular dynamics ***,non-uniform plastic deformation was observed in the *** high strain rates,amorphization occurred near the edge of the contact region where severe shear strain induced a large number of stacking faults(SFs)and *** contrast,the central part of the contact region underwent less deformation with significantly fewer ***,instead of amorphization by consuming SFs and dislocations,there was a gradual increase in the density of dislocations and SFs during the process of *** local amorphous regions eventually grew into shear bands.

关键词： Shock compression Amorphization Shear band Titanium molecular dynamics

STCF conceptual design report (Volume 1): Physics & detector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第1期19卷 1-154页

作者： m.Achasov x.C.Ai L.P.An r.Aliberti q.An x.Z.bai Y.bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.h.Bu F.m.Cai h.Cai J.J.Cao q.h.Cao x.Cao Z.Cao q.Chang K.T.Chao D.Y.Chen h.Chen h.x.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.m.Chen S.Chen S.P.Chen W.Chen x.Chen x.F.Chen x.r.Chen Y.Chen Y.q.Chen h.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai x.C.Dai D.Dedovich A.Denig I.Denisenko J.m.Dias D.Z.Ding L.Y.Dong W.h.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.m.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.q.Feng x.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge C.q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.q.Guo F.K.Guo J.C.Guo J.Guo Y.P.Guo Z.h.Guo A.Guskov K.L.han L.han m.han x.q.hao J.B.he S.q.he x.G.he Y.L.he Z.B.he Z.x.heng B.L.hou T.J.hou Y.r.hou C.Y.hu h.m.hu K.hu r.J.hu W.h.hu x.h.hu Y.C.hu J.hua G.S.huang J.S.huang m.huang q.Y.huang W.q.huang x.T.huang x.J.huang Y.B.huang Y.S.huang N.hüsken V.Ivanov q.P.Ji J.J.Jia S.Jia Z.K.Jia h.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao h.J.Jing x.L.Kang x.S.Kang B.C.Ke m.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.h.Li C.Li D.Y.Li F.Li G.Li G.Li h.B.Li h.Li h.N.Li h.J.Li h.L.Li J.m.Li J.Li L.Li L.Li L.Y.Li N.Li P.r.Li r.h.Li S.Li T.Li W.J.Li x.Li x.h.Li x.q.Li x.h.Li Y.Li Y.Y.Li Z.J.Li h.Liang J.h.Liang Y.T.Liang G.r.Liao L.Z.Liao Y.Liao C.x.Lin D.x.Lin x.S.Lin B.J.Liu C.W.Liu D.Liu F.Liu G.m.Liu h.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.Y.Liu K.Liu L.Liu q.Liu S.B.Liu T.Liu x.Liu Y.W.Liu Y.Liu Y.L.Liu Z.q.Liu Z.Y.Liu Z.W.Liu I.Logashenko Y.Long C.G.Lu J.x.Lu N.Lu q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.J.Luo T.Luo x.F.Luo Y.h.Luo h.J.Lyu x.r.Lyu J.P.ma P.ma Y.ma Y.m.ma F.maas S.malde D.matvienko Z.x.meng r.mitchell A.Nefediev Y.Nefedov S.L.Olsen q.Ouyang P.Pakhlov G.Pakhlova x.Pan Y.Pan E.Passemar Y.P.Pei h.P.Peng L.Peng x.Y.Peng x.J.Peng K.Peters S.Pivovarov E.Pyata B.B.qi Y.q.qi W.B.qian Y.qian C.F.qiao J.J.qin J.J.qin L.q.qin x.S.qin T.L.qiu J.rademacker C.F.redmer h.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of Geosciences Wuhan 430074China China University of mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China hangzhou Institute for Advanced Study UCASHangzhou 310024China hebei Normal University Shijiazhuang 050024China hebei University Baoding 071002China hefei University of Technology Hefei 230601China helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China high Energy Physics Center Chung-Ang UniversitySeoul 06974Korea higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia huangshan University Huangshan 245000China hubei University of Automotive Technology Shiyan 442002China hunan Normal University Changsha 410081China hunan University of Science and Technology Xiangtan 411201China hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in China is under development with an extensive r&D *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector r&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

Gelfand-Kirillov Dimension and reducibility of Scalar Generalized Verma modules for Classical Lie Algebras

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta mathematica Sinica,English Series 2024年第3期40卷 658-706页

作者： Zhan qiang bai Jing JIANG School of mathematical Sciences Soochow UniversitySuzhou 215006P.R.China E-mail:zqbai@*** jjsd6514@***

Let g be a classical complex simple Lie algebra and q be a parabolic *** m be a generalized Verma module induced from a one dimensional representation of *** m is called a scalar generalized Verma *** this paper,we will determine the reducibility of scalar generalized Verma modules associated to maximal parabolic subalgebras by computing explicitly the Gelfand-Kirillov dimension of the corresponding highest weight modules.

关键词： Generalized Verma module Gelfand-Kirillov dimension Young tableau

维普期刊数据库

Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第8期48卷 6-33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 W.L.Chang G.r.Che G.Chelkov C.Chen C.h.Chen Chao Chen G.Chen h.S.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 x.Chu 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.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 K.Fischer m.Fritsch C.D.Fu J.L.Fu Y.W.Fu h.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.T.Ge Z.W.Ge C.Geng E.m.Gersabeck 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 Z.h.Duan P.Egorov Y.h.Fan J.Fang JA.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 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 T.hu Y.hu G.S.huang K.x.huang L.q.huang x.T.huang Y.P.huang T.hussain F.h\"olzken N.h\"usken N.in der Wiesche m.Irshad 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 A.Kupsc W.K\"uhn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.h.Lei h.Leithoff m.Lellmann T.Lenz C.Li C.Li C.h.Li Cheng Li D.m.Li F.Li G.Li h.Li h.B.Li h.J.Li h.N.Li hui Li J.r.Li J.S.Li K.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.Y.Li Y Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum ruhr-University D-44780 BochumGermany 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 Road54000 LahorePakistan Fudan University Shanghai 200433China GSI helmholtzcentre for heavy Ion research Gmbh D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China hebei University Baoding 071002China helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany 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 INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara 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 A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKm angleγ(ϕ_(3))via the B^(−)→DK^(−)decay.

关键词： BESIII D^(0)meson decays amplitude analysis CP-even fraction

Conceptual design and configurations selection of S/h-UAVs based on q-rung dual hesitant double layer FqFD

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第9期37卷 193-205页

作者： Dun YANG Li LIU Wencan bai Weiyong TIAN School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

For the conceptual design phase of Unmanned Aerial Vehicles(UAVs),a process for conceptual design and configuration selection of Solar/hydrogen powered UAVs(S/h-UAVs)is *** design requirements of S/h-UAVs were analyzed *** proposed process used Fuzzy quality Function Deployment(FqFD)to establish logical and quantitative ***,in order to appropriately describe the hesitancy of experts while making decision,it used q-rung Dual hesitant Fuzzy Sets(qrDhFS)to score the *** addition,a decision-making framework is proposed to perform a logical selection of typical layouts based on defuzzi-fication method and Technique for Order Preference by Similarity to the Ideal Solution(TOPSIS).The present process has been applied for S/*** resulting set of design requirements con-sists of three categories:mission requirements(mrs),Engineering Characteristics(ECs)and Tech-nical Indicators(TIs).Four typical layouts of S/h-UAVs were sorted and *** performance of four typical layouts were evaluated and the Strut-Braced Wing(SBW)with external hydrogen storage was selected as the best layout for S/h-UAVs.

关键词： hybrid powered UAV Conceptual design q-rung Dual hesitant Fuzzy Set(qrDhFS) quality function deployment Strut-braced wing

Evidence for particle acceleration approaching PeV energies in the W51 complex

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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 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

维普期刊数据库

Ensemble successor representations for task generalization in offline-to-online reinforcement learning

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第7期67卷 240-255页

作者： Changhong WANG xudong YU Chenjia bai qiaosheng ZhANG Zhen WANG Space Control and Inertial Technology research Center Harbin Institute of Technology Shanghai Artificial Intelligence Laboratory Shenzhen research Institute of Northwestern Polytechnical University School of Cybersecurity Northwestern Polytechnical University

In reinforcement learning(rL), training a policy from scratch with online experiences can be inefficient because of the difficulties in exploration. recently, offline rL provides a promising solution by giving an initialized offline policy, which can be refined through online interactions. however, existing approaches primarily perform offline and online learning in the same task, without considering the task generalization problem in offline-to-online adaptation. In real-world applications, it is common that we only have an offline dataset from a specific task while aiming for fast online-adaptation for several tasks. To address this problem, our work builds upon the investigation of successor representations for task generalization in online rL and extends the framework to incorporate offline-to-online learning. We demonstrate that the conventional paradigm using successor features cannot effectively utilize offline data and improve the performance for the new task by online fine-tuning. To mitigate this, we introduce a novel methodology that leverages offline data to acquire an ensemble of successor representations and subsequently constructs ensemble q functions. This approach enables robust representation learning from datasets with different coverage and facilitates fast adaption of q functions towards new tasks during the online fine-tuning *** empirical evaluations provide compelling evidence showcasing the superior performance of our method in generalizing to diverse or even unseen tasks.

关键词： offline reinforcement learning online fine-tuning task generalization successor representations ensembles

由超拍电子伏特加速器产生的超高能伽马射线气泡

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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