Z
Zhihua Zhang
Researcher at Peking University
Publications - 207
Citations - 7051
Zhihua Zhang is an academic researcher from Peking University. The author has contributed to research in topics: Matrix (mathematics) & Optimization problem. The author has an hindex of 34, co-authored 192 publications receiving 5400 citations. Previous affiliations of Zhihua Zhang include University of California, Berkeley & University of California, Santa Barbara.
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On the Convergence of FedAvg on Non-IID Data
TL;DR: This paper analyzes the convergence of Federated Averaging on non-iid data and establishes a convergence rate of $\mathcal{O}(\frac{1}{T})$ for strongly convex and smooth problems, where $T$ is the number of SGDs.
Journal ArticleDOI
Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
G. Ambrosi,Q. An,R. Asfandiyarov,P. Azzarello,P. Bernardini,B. Bertucci,M. S. Cai,Jin Chang,Donghong Chen,H. S. Chen,Jialong Chen,Wangli Chen,M. Y. Cui,T. S. Cui,A. D'Amone,A. De Benedittis,I. De Mitri,M. Di Santo,J.N. Dong,Tie-Kuang Dong,Y. F. Dong,Z. X. Dong,Giacinto Donvito,D. Droz,Kai-Kai Duan,Jinglai Duan,M. Duranti,D. D'Urso,R. R. Fan,Yi-Zhong Fan,Fang Fang,C. Q. Feng,Luzhao Feng,P. Fusco,V. Gallo,F. J. Gan,Min Gao,Shan-Shan Gao,F. Gargano,S. Garrappa,K. Gong,Y. Z. Gong,Dong Ya Guo,Jun-jun Guo,Y. M. Hu,Guangshun Huang,Y. Y. Huang,Maria Ionica,Dan Jiang,Wei Jiang,Xian-Min Jin,Jie Kong,Shi-Jun Lei,S.X. Li,X. X. Li,W. Li,Y. Li,Y. F. Liang,YM Liang,N. H. Liao,H. Liu,Jie Liu,S. B. Liu,Wei Liu,Yujuan Liu,F. Loparco,Michael Ma,Peng-Xiong Ma,S. Y. Ma,Tianxiao Ma,X.Q. Ma,X. Y. Ma,G. Marsella,M. N. Mazziotta,D. Mo,Niu Xiaoyang,X. Y. Peng,W. X. Peng,R. Qiao,J. N. Rao,M. M. Salinas,G. Z. Shang,W. H. Shen,Z.-Q. Shen,Z. T. Shen,Ju-Xian Song,H. Su,Meng Su,Zhi-Yu Sun,A. Surdo,X. J. Teng,X.B. Tian,Andrii Tykhonov,Valerio Vagelli,S. Vitillo,Chi Wang,Huaguang Wang,Haiqiong Wang,J. Z. Wang,L. G. Wang,Qian Wang,S. Wang,Xixian Wang,X. L. Wang,Y. F. Wang,Yaping Wang,Yu-Sa Wang,S. C. Wen,Zheng Wang,D. M. Wei,J. J. Wei,Y. F. Wei,Di Wu,Jinfei Wu,Lihui Wu,Shumei Wu,Xin Wu,K. Xi,Z. Q. Xia,Y.L. Xin,H. T. Xu,Z. Xu,Z. Z. Xu,G. F. Xue,Yang Haibo,Peidong Yang,Yifan Yang,Zhongjie Yang,Huijun Yao,Y. H. Yu,Qiuju Yuan,Chuan Yue,J. J. Zang,Chao Zhang,D.L. Zhang,Fengtao Zhang,Jie Zhang,Jindan Zhang,Jindong Zhang,Laiyu Zhang,Pengchao Zhang,Shengxia Zhang,W. Zhang,Y. Zhang,Y. J. Zhang,Yun-Zhi Zhang,Yugang Zhang,Yaohui Zhang,Zhihua Zhang,Zhoubin Zhang,Hong Yun Zhao,Huan Zhao,Xin-Fu Zhao,Chengrui Zhou,Yali Zhou,Xi Zhu,Yu-Xuan Zhu,Stephan Zimmer +157 more
TL;DR: The direct detection of a spectral break at about 0.9 teraelectronvolts confirms the evidence found by previous indirect measurements, clarifies the behaviour of the CRE spectrum at energies above 1 terAElectronvolt and sheds light on the physical origin of the sub-teraelectronsvolt CREs.
High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station
L. Accardo,M. Aguilar,D. Aisa,Behcet Alpat,A. Alvino,G. Ambrosi,K. Andeen,Luísa Arruda,N. Attig,P. Azzarello,A. Bachlechner,F. Barao,A. Barrau,L. Barrin,A. Bartoloni,L. Basara,Markus Battarbee,Roberto Battiston,J. Bazo,U. Becker,M. Behlmann,B. Beischer,J. Berdugo,B. Bertucci,Gabriele Bigongiari,Veronica Bindi,S. Bizzaglia,M. Bizzarri,G. Boella,W. De Boer,K. Bollweg,V. Bonnivard,B. Borgia,S. Borsini,Matteo Boschini,M. Bourquin,J. D. Burger,Franck Cadoux,X. D. Cai,M. Capell,S. Caroff,Gianpaolo Carosi,J. Casaus,V. Cascioli,G. Castellini,I. Cernuda,D. Cerreta,F. Cervelli,M. J. Chae,Y. H. Chang,A. I. Chen,H. S. Chen,G. M. Cheng,H. S. Chen,Lin Cheng,A. Chikanian,H. Y. Chou,E. Choumilov,V. Choutko,C. H. Chung,Federico Cindolo,C. Clark,R. Clavero,G. Coignet,C. Consolandi,A. Contin,Claudio Corti,B. Coste,Z. Cui,M. Dai,C. Delgado,S. Della Torre,M. B. Demirköz,L. Derome,S. Di Falco,L. Di Masso,F. Dimiccoli,Carlos Díaz,P. von Doetinchem,W. J. Du,M. Duranti,D. D'Urso,A. Eline,F. J. Eppling,T. Eronen,Y. Y. Fan,L. Farnesini,J. Feng,E. Fiandrini,A. Fiasson,E. Finch,Peter H. Fisher,Yu. Galaktionov,G. Gallucci,Bruce Rafael Mellado Garcia,R. J. García-López,Henning Gast,I. Gebauer,Massimo Gervasi,A. Ghelfi,W. Gillard,F. Giovacchini,P. Goglov,J. Gong,C. Goy,Varlen Grabski,D. Grandi,M. Graziani,C. Guandalini,I. Guerri,K. H. Guo,D. Haas,M. Habiby,Sadakazu Haino,K. C. Han,Z. H. He,Matthias Heil,Reyco Henning,J. Hoffman,Timothy H. Hsieh,Zhiqi Huang,Changgi Huh,M. Incagli,Maria Ionica,W. Y. Jang,H. Jinchi,K. Kanishev,G. N. Kim,Kwangsoo Kim,T. Kirn,R. Kossakowski,O. Kounina,Andrei Kounine,V. Koutsenko,M. S. Krafczyk,S. Kunz,G. La Vacca,Elisa Laudi,G. Laurenti,I. Lazzizzera,Alexandre Lebedev,H. T. Lee,S. C. Lee,C. Leluc,Giuseppe Levi,Haifeng Li,Jinglai Li,Qiang Li,T. X. Li,Wei Li,Yongyao Li,Z. H. Li,Z. Y. Li,S. Lim,Chia-Hui Lin,P. Lipari,Thomas Lippert,D. Liu,Hengchang Liu,M. Lolli,Teimuraz Lomtadze,Miaoran Lu,Ying Lu,K. Luebelsmeyer,F. Luo,J. Z. Luo,S. S. Lv,R. D. Majka,Alexander Malinin,C. Mañá,Julio C. Marín,Tim Martin,G. Martinez,N. Masi,F. Massera,David Maurin,Arturo Alejandro Menchaca-Rocha,Q. Meng,D. C. Mo,Benjamin Monreal,Luca Morescalchi,P. Mott,M. Müller,J. Q. Ni,N. Nikonov,F. Nozzoli,P. Nunes,A. Obermeier,A. Oliva,M. Orcinha,F. Palmonari,C. Palomares,M. Paniccia,A. Papi,M. Pauluzzi,E. Pedreschi,S. Pensotti,Rodrigo Araujo Pereira,R. Pilastrini,Fabrizio Giulio Luca Pilo,A. Piluso,C. Pizzolotto,V. Plyaskin,M. Pohl,V. Poireau,E. Postaci,Antje Putze,Lucio Quadrani,X. M. Qi,P. G. Rancoita,D. Rapin,J. S. Ricol,I. Rodríguez,S. Rosier-Lees,Lucio Rossi,A. Rozhkov,Davide Rozza,Gray Rybka,Roald Z. Sagdeev,J. Sandweiss,P. Saouter,Carla Sbarra,S. Schael,S. M. Schmidt,D. Schuckardt,A. Schulz von Dratzig,G. Schwering,G. Scolieri,Eun-Suk Seo,B. S. Shan,Y. H. Shan,J. Y. Shi,X. Y. Shi,Yun Shi,T. Siedenburg,Dong-Chul Son,F. Spada,F. Spinella,Won Kyu Calvin Sun,W. H. Sun,Mauro Tacconi,C. P. Tang,X. W. Tang,Zhixiang Tang,L. Tao,D. Tescaro,Samuel C.C. Ting,S. M. Ting,Nicola Tomassetti,J. J. Torsti,C. Türkoğlu,T. Urban,Valerio Vagelli,E. Valente,C. Vannini,Eino Valtonen,S. S. Vaurynovich,Manuela Vecchi,Mayda Velasco,J. P. Vialle,V. Vitale,G. Volpini,Liqiu Wang,Q. L. Wang,Ruiguang Wang,Xiaoping Wang,Zheng Wang,Z. L. Weng,K. Whitman,J. Wienkenhöver,H. Wu,K. Y. Wu,X. Xia,M. Xie,S. Xie,R. Q. Xiong,Gongming Xin,Ningsheng Xu,W. Xu,Q. Yan,J. Yang,Mingming Yang,Q. H. Ye,H. Yi,Y. J. Yu,Z. Q. Yu,S. Zeissler,J. H. Zhang,M. T. Zhang,X. B. Zhang,Zhihua Zhang,Z. M. Zheng,Fei Zhou,H. L. Zhuang,Valery Zhukov,Antonino Zichichi,N. Zimmermann,Paolo Zuccon,C. Zurbach +298 more
Proceedings Article
On the Convergence of FedAvg on Non-IID Data
TL;DR: In this paper, the authors analyzed the convergence of Federated Averaging on non-iid data and established a convergence rate of O(mathcal{O}(\frac{1}{T}) for strongly convex and smooth problems, where T is the number of SGDs.
Journal ArticleDOI
Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station.
M. Aguilar,L. Ali Cavasonza,G. Ambrosi,Luísa Arruda,N. Attig,S. Aupetit,Philipp Azzarello,A. Bachlechner,F. Barao,A. Barrau,L. Barrin,A. Bartoloni,L. Basara,S. Başeğmez-du Pree,Markus Battarbee,Roberto Battiston,U. Becker,M. Behlmann,B. Beischer,J. Berdugo,B. Bertucci,K. F. Bindel,Veronica Bindi,G. Boella,W. De Boer,K. Bollweg,V. Bonnivard,B. Borgia,Matteo Boschini,M. Bourquin,E. F. Bueno,J. D. Burger,Franck Cadoux,X. D. Cai,M. Capell,S. Caroff,J. Casaus,G. Castellini,F. Cervelli,M. J. Chae,Y. H. Chang,A. I. Chen,Guo-Ming Chen,H. S. Chen,Lin Cheng,H. Y. Chou,E. Choumilov,V. Choutko,C. H. Chung,C. Clark,R. Clavero,G. Coignet,C. Consolandi,Andrea Contin,Claudio Corti,W. Creus,M. Crispoltoni,Z. Cui,Yaomin Dai,C. Delgado,S. Della Torre,O. Demakov,M. B. Demirköz,Laurent Derome,S. Di Falco,F. Dimiccoli,Carlos Díaz,P. von Doetinchem,F. Dong,F. Donnini,M. Duranti,D. D'Urso,A. Egorov,A. Eline,T. Eronen,Jianfeng Feng,E. Fiandrini,E. Finch,Peter H. Fisher,V. Formato,Yu. Galaktionov,G. Gallucci,Bruce Rafael Mellado Garcia,R. J. García-López,Corrado Gargiulo,Henning Gast,I. Gebauer,Massimo Gervasi,A. Ghelfi,F. Giovacchini,P. Goglov,D. M. Gómez-Coral,J. Gong,C. Goy,Varlen Grabski,D. Grandi,M. Graziani,K. H. Guo,Sadakazu Haino,K. C. Han,Z. H. He,Matthias Heil,J. Hoffman,Timothy H. Hsieh,H. P. Huang,Zhiqi Huang,Changgi Huh,M. Incagli,Maria Ionica,W. Y. Jang,H. Jinchi,S. C. Kang,K. Kanishev,G. N. Kim,Kwangsoo Kim,T. Kirn,C. Konak,O. Kounina,Andrei Kounine,V. Koutsenko,M. S. Krafczyk,G. La Vacca,Elisa Laudi,G. Laurenti,I. Lazzizzera,A. Lebedev,H. T. Lee,S. C. Lee,C. Leluc,Hui Li,Jinglai Li,Qiang Li,T. X. Li,Wei Li,Y. Li,Z. H. Li,Z. Y. Li,S. Lim,Chia-Hui Lin,P. Lipari,Thomas Lippert,D. Liu,Hu Liu,V. D. Lordello,S. Q. Lu,Ying Lu,K. Luebelsmeyer,F. Luo,J. Z. Luo,S. S. Lv,F. Machate,R. D. Majka,C. Mañá,J. C. Marin,T. Martin,G. Martinez,N. Masi,David Maurin,Arturo Alejandro Menchaca-Rocha,Q. Meng,V. M. Mikuni,D. C. Mo,Luca Morescalchi,P. Mott,T. J. N. Nelson,J. Q. Ni,N. Nikonov,F. Nozzoli,A. Oliva,M. Orcinha,F. Palmonari,C. Palomares,M. Paniccia,M. Pauluzzi,S. Pensotti,R. Pereira,N. Picot-Clemente,Fabrizio Giulio Luca Pilo,C. Pizzolotto,V. Plyaskin,M. Pohl,V. Poireau,Antje Putze,Lucio Quadrani,X. M. Qi,Xubo Qin,Z. Y. Qu,T. Räihä,P. G. Rancoita,D. Rapin,J. S. Ricol,S. Rosier-Lees,A. Rozhkov,Davide Rozza,Roald Z. Sagdeev,J. Sandweiss,P. Saouter,S. Schael,S. M. Schmidt,A. Schulz von Dratzig,G. Schwering,Eun-Suk Seo,B. S. Shan,J. Y. Shi,T. Siedenburg,Dong-Chul Son,J. W. Song,W. H. Sun,Mauro Tacconi,X. W. Tang,Zhixiang Tang,L. Tao,D. Tescaro,Samuel C.C. Ting,Samuel C.C. Ting,Nicola Tomassetti,J. J. Torsti,C. Türkoğlu,T. Urban,V. Vagelli,E. Valente,C. Vannini,Eino Valtonen,M. Vazquez Acosta,M. Vecchi,Mayda Velasco,J. P. Vialle,V. Vitale,S. Vitillo,Liqiu Wang,Naihua Wang,Q. L. Wang,Xiaoqun Wang,X. Q. Wang,Zhao Wang,C. C. Wei,Z. L. Weng,K. Whitman,J. Wienkenhöver,H. Wu,Xin Wu,X. Xia,R. Q. Xiong,W. Xu,Q. Yan,J. Yang,Mingming Yang,Yang Yang,H. Yi,Y. J. Yu,Z. Q. Yu,S. Zeissler,Chao Zhang,Jiawen Zhang,J. H. Zhang,S. Zhang,Shihao Zhang,Zhihua Zhang,Z. M. Zheng,Zhiwei Zhu,H. L. Zhuang,Valery Zhukov,Antonino Zichichi,N. Zimmermann,Paolo Zuccon +264 more
TL;DR: In this paper, the rigidity dependence of the boron to carbon flux ratio (B/C) is studied and a detailed variation with rigidity of the B=C spectral index is reported for the first time.