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Complex modal shapes superposition response spectrum approach based on vibration isolation structure benchmark model

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Zhendong yu Chongji/Journal of Vibration and Shock 2017年第23期36卷 157-163页

作者： Chen, Huating Tan, Ping Peng, Lingyun Li, Zhishan Zhou, Fulin Guangzhou University Guangzhou510405 China College of Architecture and Civil Engineering Beijing University of Technology Beijing100122 China

A vibration isolation structure is composed of a superstructure and a vibration isolation layer including vibration isolation bearings and dampers with different damping features from those of superstructure, which possess typically non-proportional damping features. So, the damping matrix of this system can't be decomposed via the system's undamped modal shapes and the traditional modal shapes superposition response spectrum method is not applicable to this system. Here, based on the random vibration theory and considering features of vibration isolation structures, a multi-dimensional earthquake complex modal shapes superposition response spectrum method was proposed, it could consider non-proportional damping features. The error of the forced decoupling method, an approximate approach commonly used, was studied. It was found that the energy transfer between the superstructure and the vibration isolation layer is prevented with this method to cause smaller seismic responses of the superstructure. The vibration isolation benchmark model was taken as an example to implement the time-history method, the forced decoupling method and the proposed complex modal shapes superposition response spectrum method, respectively. Three results were compared, it was shown that the proposed method has a better accuracy and can fully reflect the non-proportional damping characteristics in vibration isolation systems;when the damping of the vibration isolation layer is larger, the forced decoupling approach has a worse accuracy, it can't reflect the amplification effects of the superstructure seismic responses due to damping of the vibration isolation layer. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.

关键词： Damping

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Truncation error and improvement of complex modal superposition approach

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Zhendong Gongcheng Xuebao/Journal of Vibration engineering 2017年第4期30卷 555-563页

作者： Chen, Hua-Ting Tang, Ping Peng, Ling-Yun Li, Zhi-Shan Zhou, Fu-Lin Guangzhou University Guangzhou510405 China College of Architecture and Civil Engineering Beijing University of Technology Beijing100124 China

Based on the complex modal superposition theory, the original error of complex mode truncation, which is used to analyze the non-classically damped linear system, is studied and the error formula is obtained. Similar to higher modal responses of classical damping systems, the form of response ratio shows that with the decrease of the ratio of input frequency and natural frequency the displacements of higher complex modal equations can also represented by static displacement of dynamic load. Therefore, because of this fact, static correction method and modal acceleration approach about non-classical damping systems are derived, whose forms are the same as that of the conventional methods. In addition, the correction methods of both real and complex modal superposition approaches are unified according to the condition of complex modes degenerating to real modes (real part is proportional to imaginary part). At last, the effectiveness of correction methods is verified through a numerical example, particularly for the case that the major natural frequencies are beyond the input significant frequency range;in addition, it is observed that rising the added damping will reduce, to some degree, the efficiency of the modified method since the added damping decreases some high-order natural frequencies. © 2017, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.

关键词： Natural frequencies

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Measurement of simplified template cross sections of the Higgs boson produced in association with W or Z bosons in the H→bb¯ decay channel in proton-proton collisions at s=13 TeV

引用

Physical Review D 2024年第9期109卷 092011-092011页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. Bergauer S. Chatterjee K. Damanakis M. Dragicevic A. Escalante Del Valle P. S. Hussain M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch J. Schieck R. Schöfbeck D. Schwarz M. Sonawane S. Templ W. Waltenberger C.-E. Wulz M. R. Darwish T. Janssen T. Kello H. Rejeb Sfar P. Van Mechelen E. S. Bols J. D’Hondt A. De Moor M. Delcourt H. El Faham S. Lowette A. Morton D. Müller A. R. Sahasransu S. Tavernier W. Van Doninck S. Van Putte D. Vannerom B. Clerbaux G. De Lentdecker L. Favart D. Hohov J. Jaramillo K. Lee M. Mahdavikhorrami I. Makarenko A. Malara S. Paredes L. Pétré N. Postiau L. Thomas M. Vanden Bemden C. Vander Velde P. Vanlaer D. Dobur J. Knolle L. Lambrecht G. Mestdach C. Rendón A. Samalan K. Skovpen M. Tytgat N. Van Den Bossche B. Vermassen L. Wezenbeek A. Benecke G. Bruno F. Bury C. Caputo P. David C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre K. Mondal A. Taliercio T. T. Tran P. Vischia S. Wertz G. A. Alves E. Coelho C. Hensel A. Moraes P. Rebello Teles W. L. Aldá Júnior M. Alves Gallo Pereira M. Barroso Ferreira Filho H. Brandao Malbouisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao V. Dos Santos Sousa S. Fonseca De Souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. Santoro S. M. Silva Do Amaral A. Sznajder M. Thiel A. Vilela Pereira C. A. Bernardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov B. Pavlov P. Petkov A. Petrov E. Shumka S. Thakur T. Cheng T. Javaid M. Mittal L. Yuan M. Ahmad G. Bauer Z. Hu S. Lezki K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu V. Milosevic F. Monti R. Sharma J. Tao J. Thomas-Wilsker J. Wang H. Zhang J. Zhao A. Agapitos Y. An Y. Ban A. Levin C. Li Q. Li X. Lyu Y. Mao S. J. Qian X. Sun D. Wang J. Xiao H. Yang M. Lu Z. You N. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)—Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physic

Differential cross sections are measured for the standard model Higgs boson produced in association with vector bosons (W, Z) and decaying to a pair of b quarks. Measurements are performed within the framework of the simplified template cross sections. The analysis relies on the leptonic decays of the W and Z bosons, resulting in final states with 0, 1, or 2 electrons or muons. The Higgs boson candidates are either reconstructed from pairs of resolved b-tagged jets, or from single large-radius jets containing the particles arising from two b quarks. Proton-proton collision data at s=13 TeV, collected by the CMS experiment in 2016–2018 and corresponding to a total integrated luminosity of 138 fb−1, are analyzed. The inclusive signal strength, defined as the product of the observed production cross section and branching fraction relative to the standard model expectation, combining all analysis categories, is found to be μ=1.15−0.20+0.22. This corresponds to an observed (expected) significance of 6.3 (5.6) standard deviations.

关键词： Higgs bosons Hadron colliders

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Benchmarking the design of the cryogenics system for the underground argon in DarkSide-20k

arXiv

引用

arXiv 2024年

作者： Acerbi, F. Adhikari, P. Agnes, P. Ahmad, I. Albergo, S. Albuquerque, I.F.M. Alexander, T. Alton, A.K. Amaudruz, P. Angiolilli, M. Aprile, E. Ardito, R. Corona, M. Atzori Auty, D.J. Ave, M. Avetisov, I.C. Azzolini, O. Back, H.O. Balmforth, Z. Olmedo, A. Barrado Barrillon, P. Batignani, G. Bhowmick, P. Blua, S. Bocci, V. Bonivento, W. Bottino, B. Boulay, M.G. Buchowicz, A. Bussino, S. Busto, J. Cadeddu, M. Cadoni, M. Calabrese, R. Camillo, V. Caminata, A. Canci, N. Capra, A. Caravati, M. Cárdenas-Montes, M. Cargioli, N. Carlini, M. Castellani, A. Castello, P. Cavalcante, P. Cebrian, S. Ruiz, J. Cela Chashin, S. Chepurnov, A. Cifarelli, L. Cintas, D. Citterio, M. Cleveland, B. Coadou, Y. Cocco, V. Colaiuda, D. Vilda, E. Conde Consiglio, L. Costa, B.S. Czubak, M. D’Aniello, M. D’Auria, S. Da Rocha Rolo, M.D. Darbo, G. Davini, S. De Cecco, S. De Guido, G. Dellacasa, G. Derbin, A.V. Devoto, A. Di Capua, F. Di Ludovico, A. Di Noto, L. Di Stefano, P. Dias, L.K. Mairena, D. Díaz Ding, X. Dionisi, C. Dolganov, G. Dordei, F. Dronik, V. Elersich, A. Ellingwood, E. Erjavec, T. Diaz, M. Fernandez Ficorella, A. Fiorillo, G. Franchini, P. Franco, D. Gatti, H. Frandini Frolov, E. Gabriele, F. Gahan, D. Galbiati, C. Galiński, G. Gallina, G. Gallus, G. Garbini, M. Abia, P. Garcia Gawdzik, A. Gendotti, A. Ghisi, A. Giovanetti, G.K. Casanueva, V. Goicoechea Gola, A. Grandi, L. Grauso, G. di Cortona, G. Grilli Grobov, A. Gromov, M. Guerzoni, M. Gulino, M. Guo, C. Hackett, B.R. Hallin, A. Hamer, A. Haranczyk, M. Harrop, B. Hessel, T. Hill, S. Horikawa, S. Hu, J. Hubaut, F. Hucker, J. Hugues, T. Hungerford, E.V. Ianni, A. Ippolito, V. Jamil, A. Jillings, C. Jois, S. Kachru, P. Keloth, R. Kemmerich, N. Kemp, A. Kendziora, C.L. Kimura, M. Kish, A. Kondo, K. Korga, G. Kotsiopoulou, L. Koulosousas, S. Kubankin, A. Kunzé, P. Kuss, M. Kuźniak, M. Kuzwa, M. La Commara, M. Lai, M. Le Guirriec, E. Leason, E. Leoni, A. Lidey, L. Lissia, M. Fondazione Bruno Kessler Povo38123 Italy Department of Physics Carleton University OttawaONK1S 5B6 Canada Gran Sasso Science Institute L’Aquila67100 Italy INFN Laboratori Nazionali del Gran Sasso AQ Assergi67100 Italy AstroCeNT Nicolaus Copernicus Astronomical Center the Polish Academy of Sciences Warsaw00-614 Poland INFN Catania Catania95121 Italy Università of Catania Catania95124 Italy Instituto de Física Universidade de São Paulo São Paulo05508-090 Brazil Pacific Northwest National Laboratory RichlandWA99352 United States Physics Department Augustana University Sioux FallsSD57197 United States TRIUMF 4004 Wesbrook Mall VancouverBCV6T 2A3 Canada Physics Department Columbia University New YorkNY10027 United States Civil and Environmental Engineering Department Politecnico di Milano Milano20133 Italy INFN Milano Milano20133 Italy INFN Cagliari Cagliari09042 Italy Physics Department Università degli Studi di Cagliari Cagliari09042 Italy Department of Physics University of Alberta EdmontonABT6G 2R3 Canada Mendeleev University of Chemical Technology Moscow125047 Russia INFN Laboratori Nazionali di Legnaro Padova Legnaro35020 Italy Savannah River National Laboratory JacksonSC29831 United States Department of Physics Royal Holloway University of London EghamTW20 0EX United Kingdom CIEMAT Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid28040 Spain Centre de Physique des Particules de Marseille Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Physics Department Università degli Studi di Pisa Pisa56127 Italy INFN Pisa Pisa56127 Italy University of Oxford OxfordOX1 2JD United Kingdom INFN Torino Torino10125 Italy Department of Electronics and Communications Politecnico di Torino Torino10129 Italy INFN Sezione di Roma Roma00185 Italy Physics Department Università degli Studi di Genova Genova16146 Italy INFN Genova Genova16146 Italy Institute of Radioelectronics and Multime

DarkSide-20k (DS-20k) is a dark matter detection experiment under construction at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It utilises ∼100 t of low radioactivity argon from an underground source (UAr) in its inner detector, with half serving as target in a dual-phase time projection chamber (TPC). The UAr cryogenics system must maintain stable thermodynamic conditions throughout the experiment’s lifetime of over 10 years. Continuous removal of impurities and radon from the UAr is essential for maximising signal yield and mitigating background. We are developing an efficient and powerful cryogenics system with a gas purification loop with a target circulation rate of 1000 slpm. Central to its design is a condenser operated with liquid nitrogen which is paired with a gas heat exchanger cascade, delivering a combined cooling power of more than 8 kW. Here we present the design choices in view of the DS-20k requirements, in particular the condenser’s working principle and the cooling control, and we show test results obtained with a dedicated benchmarking platform at CERN and LNGS. We find that the thermal efficiency of the recirculation loop, defined in terms of nitrogen consumption per argon flow rate, is 95 % and the pressure in the test cryostat can be maintained within ±(0.1 − 0.2) mbar. We further detail a 5-day cool-down procedure of the test cryostat, maintaining a cooling rate typically within −2 K/h, as required for the DS-20k inner detector. Additionally, we assess the circuit’s flow resistance, and the heat transfer capabilities of two heat exchanger geometries for argon phase change, used to provide gas for recirculation. We conclude by discussing how our findings influence the finalisation of the system design, including necessary modifications to meet requirements and ongoing testing activities. Copyright © 2024, The Authors. All rights reserved.

关键词： Dark Matter

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Microstructure and Performance of a High Manganese Steel Matrix Composite Reinforced by(Fe,Cr)7C3 Particle Beams

Microstructure and Performance of a High Manganese Steel Mat...

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2016先进材料科学国际研讨会

作者： Honghua YAN Baoke GUO College of Mechanical and Electrical Engineering Xi’an University of Architecture and Technology Department of Mechanics Xi’an University of Architecture and Technology

A high manganese steel matrix composite with reinforced(Fe,Cr)C particle beam was fabricated via melt compositing and in-situ formation *** microstructure of the composite was analyzed by scanning electron microscopy and energy dispersive X-ray *** reinforced phase of the composite mainly include column and fine short rod or globular carbide(Fe,Cr)C, and the former is *** investigate the wear resistant properties of the composite, wear tests at different loadings(5N, 10 N, 15 N and 20N) were carried on the wear *** comparison, the wear tests of a high manganese steel were also conducted with the same *** results show that the abrasive wear resistance is strengthened significantly due to the formation of(Fe,Cr)C particle beam, which were created through the chemical reaction of alloy *** to the impact fracture experiments of the composite, it is found that the fracture of particle beams in the composite belongs to a brittle fracture.

关键词：

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DarkSide-20k sensitivity to light dark matter particles

arXiv

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arXiv 2024年

作者： Acerbi, F. Adhikari, P. Agnes, P. Ahmad, I. Albergo, S. Albuquerque, I.F.M. Alexander, T. Alton, A.K. Amaudruz, P. Angiolilli, M. Aprile, E. Ardito, R. Corona, M. Atzori Auty, D.J. Ave, M. Avetisov, I.C. Azzolini, O. Back, H.O. Balmforth, Z. Olmedo, A. Barrado Barrillon, P. Batignani, G. Bhowmick, P. Blua, S. Bocci, V. Bonivento, W. Bottino, B. Boulay, M.G. Buchowicz, A. Bussino, S. Busto, J. Cadeddu, M. Cadoni, M. Calabrese, R. Camillo, V. Caminata, A. Canci, N. Capra, A. Caravati, M. Cárdenas-Montes, M. Cargioli, N. Carlini, M. Castellani, A. Castello, P. Cavalcante, P. Cebrian, S. Ruiz, J.M. Cela Chashin, S. Chepurnov, A. Cifarelli, L. Cintas, D. Citterio, M. Cleveland, B. Coadou, Y. Cocco, V. Colaiuda, D. Vilda, E. Conde Consiglio, L. Costa, B.S. Czubak, M. D’Aniello, M. D’Auria, S. Da Rocha Rolo, M.D. Darbo, G. Davini, S. De Cecco, S. De Guido, G. Dellacasa, G. Derbin, A.V. Devoto, A. Di Capua, F. Di Ludovico, A. Di Noto, L. Di Stefano, P. Dias, L.K. Mairena, D. Díaz Ding, X. Dionisi, C. Dolganov, G. Dordei, F. Dronik, V. Elersich, A. Ellingwood, E. Erjavec, T. Diaz, M. Fernandez Ficorella, A. Fiorillo, G. Franchini, P. Franco, D. Gatti, H. Frandini Frolov, E. Gabriele, F. Gahan, D. Galbiati, C. Galin´ski, G. Gallina, G. Gallus, G. Garbini, M. Abia, P. Garcia Gawdzik, A. Gendotti, A. Ghisi, A. Giovanetti, G.K. Casanueva, V. Goicoechea Gola, A. Grandi, L. Grauso, G. di Cortona, G. Grilli Grobov, A. Gromov, M. Guerzoni, M. Gulino, M. Guo, C. Hackett, B.R. Hallin, A. Hamer, A. Haranczyk, M. Harrop, B. Hessel, T. Hill, S. Horikawa, S. Hu, J. Hubaut, F. Hucker, J. Hugues, T. Hungerford, E.V. Ianni, A. Ippolito, V. Jamil, A. Jillings, C. Jois, S. Kachru, P. Keloth, R. Kemmerich, N. Kemp, A. Kendziora, C.L. Kimura, M. Kondo, K. Korga, G. Kotsiopoulou, L. Koulosousas, S. Kubankin, A. Kunzé, P. Kuss, M. Kuz´niak, M. Kuzwa, M. La Commara, M. Lai, M. Le Guirriec, E. Leason, E. Leoni, A. Lidey, L. Lissia, M. Luzzi, L. Fondazione Bruno Kessler Povo38123 Italy Department of Physics Carleton University OttawaONK1S 5B6 Canada Gran Sasso Science Institute L’Aquila67100 Italy INFN Laboratori Nazionali del Gran Sasso AQ Assergi67100 Italy AstroCeNT Nicolaus Copernicus Astronomical Center The Polish Academy of Sciences Warsaw00-614 Poland INFN Catania Catania95121 Italy Università of Catania Catania95124 Italy Instituto de Física Universidade de São Paulo São Paulo05508-090 Brazil Pacific Northwest National Laboratory RichlandWA99352 United States Physics Department Augustana University Sioux FallsSD57197 United States TRIUMF 4004 Wesbrook Mall VancouverBCV6T 2A3 Canada Physics Department Columbia University New YorkNY10027 United States Civil and Environmental Engineering Department Politecnico di Milano Milano20133 Italy INFN Milano Milano20133 Italy INFN Cagliari Cagliari09042 Italy Physics Department Università degli Studi di Cagliari Cagliari09042 Italy Department of Physics University of Alberta EdmontonABT6G 2R3 Canada Mendeleev University of Chemical Technology Moscow125047 Russia INFN Laboratori Nazionali di Legnaro Legnaro Padova35020 Italy Savannah River National Laboratory JacksonSC29831 United States Department of Physics Royal Holloway University of London EghamTW20 0EX United Kingdom CIEMAT Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid28040 Spain Centre de Physique des Particules de Marseille Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Physics Department Università degli Studi di Pisa Pisa56127 Italy INFN Pisa Pisa56127 Italy University of Oxford OxfordOX1 2JD United Kingdom INFN Torino Torino10125 Italy Department of Electronics and Communications Politecnico di Torino Torino10129 Italy INFN Sezione di Roma Roma00185 Italy Physics Department Università degli Studi di Genova Genova16146 Italy INFN Genova Genova16146 Italy Institute of Radioelectronics and Multi

The dual-phase liquid argon time projection chamber is presently one of the leading technologies to search for dark matter particles with masses below 10 GeV/c2. This was demonstrated by the DarkSide-50 experiment with approximately 50 kg of low-radioactivity liquid argon as target material. The next generation experiment DarkSide-20k, currently under construction, will use 1,000 times more argon and is expected to start operation in 2027. Based on the DarkSide-50 experience, here we assess the DarkSide-20k sensitivity to models predicting light dark matter particles, including Weakly Interacting Massive Particles (WIMPs) and sub-GeV/c2 particles interacting with electrons in argon atoms. With one year of data, a sensitivity improvement to dark matter interaction cross-sections by at least one order of magnitude with respect to DarkSide-50 is expected for all these models. A sensitivity to WIMP–nucleon interaction cross-sections below 1 × 10−42 cm2 is achievable for WIMP masses above 800 MeV/c2. With 10 years exposure, the neutrino fog can be reached for WIMP masses around 5 GeV/c2 © 2024, CC BY.

关键词： Germanium alloys

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Surface Vibration Test and HHT Signal Analysis of Explosion in Subway Shallow Buried Tunnel

引用

Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of technology 2018年 38卷 14-17页

作者： Liu, Dong Gao, Wen-Xue Shi, Lian-Song Wang, Lin-Tai Cao, Xiao-Li College of Architecture and Civil Engineering Beijing University of Technology Beijing100124 China Beijing Road Engineering Quality Supervision Station Beijing100068 China

To eliminate the effect of blasting vibration on subway construction and the surrounding structures in shallow buried tunnel, several vibration monitoring tests were conducted on the Zhongyinggong-Xiaoxigou segment of Xinjiang Urumqi Line 1 subway tunnel surface. The vibration velocity decreases gradually. By HHT transform analysis of blasting vibration signal, it is concluded that the vibration energy generated by blasting is mainly distributed in the time period of 0~1.5 s and low frequency band of 0~50 Hz. Dividing cut holes into several segments can significantly reduce the surface vertical vibration velocity, and it effectively control the impact of the tunnel blasting construction on the surrounding structures. © 2018, Editorial Department of Transaction of Beijing Institute of technology. All right reserved.

关键词： Blasting

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Search for a scalar or pseudoscalar dilepton resonance produced in association with a massive vector boson or top quark-antiquark pair in multilepton events at s=13 TeV

引用

Physical Review D 2024年第1期110卷 012013-012013页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. Bergauer S. Chatterjee K. Damanakis M. Dragicevic A. Escalante Del Valle P. S. Hussain M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch J. Schieck R. Schöfbeck D. Schwarz M. Sonawane S. Templ W. Waltenberger C.-E. Wulz M. R. Darwish T. Janssen T. Kello P. Van Mechelen E. S. Bols J. D’Hondt A. De Moor M. Delcourt H. El Faham S. Lowette A. Morton D. Müller A. R. Sahasransu S. Tavernier W. Van Doninck S. Van Putte D. Vannerom B. Clerbaux S. Dansana G. De Lentdecker L. Favart D. Hohov J. Jaramillo K. Lee M. Mahdavikhorrami I. Makarenko A. Malara S. Paredes L. Pétré N. Postiau L. Thomas M. Vanden Bemden C. Vander Velde P. Vanlaer D. Dobur J. Knolle L. Lambrecht G. Mestdach C. Rendón A. Samalan K. Skovpen M. Tytgat N. Van Den Bossche B. Vermassen L. Wezenbeek A. Benecke G. Bruno F. Bury C. Caputo P. David C. Delaere I. S. Donertas A. Giammanco K. Jaffel Sa. Jain V. Lemaitre K. Mondal A. Taliercio T. T. Tran P. Vischia S. Wertz G. A. Alves E. Coelho C. Hensel A. Moraes P. Rebello Teles W. L. Aldá Júnior M. Alves Gallo Pereira M. Barroso Ferreira Filho H. Brandao Malbouisson W. Carvalho J. Chinellato E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao V. Dos Santos Sousa S. Fonseca De Souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. Santoro S. M. Silva Do Amaral A. Sznajder M. Thiel A. Vilela Pereira C. A. Bernardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. Shopova G. Sultanov A. Dimitrov T. Ivanov L. Litov B. Pavlov P. Petkov A. Petrov E. Shumka S. Keshri S. Thakur T. Cheng Q. Guo T. Javaid M. Mittal L. Yuan G. Bauer Z. Hu S. Lezki K. Yi G. M. Chen H. S. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu V. Milosevic F. Monti R. Sharma J. Tao J. Thomas-Wilsker J. Wang H. Zhang J. Zhao A. Agapitos Y. Ban A. Carvalho Antunes De Oliveira A. Levin C. Li Q. Li X. Lyu Y. Mao S. J. Qian X. Sun D. Wang Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)—Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physic

A search for beyond the standard model spin-0 bosons, ϕ, that decay into pairs of electrons, muons, or tau leptons is presented. The search targets the associated production of such bosons with a W or Z gauge boson, or a top quark-antiquark pair, and uses events with three or four charged leptons, including hadronically decaying tau leptons. The proton-proton collision data set used in the analysis was collected at the LHC from 2016 to 2018 at a center-of-mass energy of 13 TeV, and corresponds to an integrated luminosity of 138 fb−1. The observations are consistent with the predictions from standard model processes. Upper limits are placed on the product of cross sections and branching fractions of such new particles over the mass range of 15 to 350 GeV with scalar, pseudoscalar, or Higgs-boson-like couplings, as well as on the product of coupling parameters and branching fractions. Several model-dependent exclusion limits are also presented. For a Higgs-boson-like ϕ model, limits are set on the mixing angle of the Higgs boson with the ϕ boson. For the associated production of a ϕ boson with a top quark-antiquark pair, limits are set on the coupling to top quarks. Finally, limits are set for the first time on a fermiophilic dilaton-like model with scalar couplings and a fermiophilic axion-like model with pseudoscalar couplings.

关键词： Extensions of scalar sector W & Z bosons Hadron colliders

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Interlayer shear of nanomaterials:Graphene–graphene,boron nitride–boron nitride and graphene–boron nitride

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Acta Mechanica Solida Sinica 2017年第3期30卷 234-240页

作者： Yinfeng Li Weiwei Zhang Bill Guo Dibakar Dattac Department of Engineering Mechanics School of Naval Architecture Ocean and Civil Engineering (State Key Laboratory of Ocean Engineering Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration) Shanghai Jiao Tong University Shanghai 200240 China Department of Materials Science and Engineering University of Pennsylvania Philadelphia PA 19104 USA Department of Mechanical and Industrial Engineering Newark College of Engineering New Jersey Institute of Technology Newark NJ 07102 USA Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education Nanjing University of Aeronautics and Astronautics Nanjinq 210016 China

In this paper, the interlayer sliding between graphene and boron nitride （h-BN） is studied by molecular dynamics simulations. The interlayer shear force between h-BN/h-BN is found to be six times higher than that of graphene/graphene, while the interlayer shear between graphene/h-BN is approximate to that of graphene/graphene. The graphene/h- BN heterostructure shows several anomalous interlayer shear characteristics compared to its bilayer counterparts. For graphene/graphene and h-BN/h-BN, interlayer shears only exit along the sliding direction while interlayer shear for graphene/h-BN is observed along both the translocation and perpendicular directions. Our results provide significant insight into the interlayer shear characteristics of 2D nanomaterials.

关键词： Friction Interlayer shear Graphene Hexongal boron nitride Molecular dynamics

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Exploring in-hospital rehabilitation exercises for stroke patients: Informing interaction design 17

Exploring in-hospital rehabilitation exercises for stroke pa...

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29th Australian Computer-Human Interaction Conference, OzCHI 2017

作者： Pickrell, Michelle Van Den Hoven, Elise Bongers, Bert Faculty of Design Architecture and Building University of Technology Sydney Australia Faculty of Engineering and Information Technology University of Technology Sydney Australia Department of Industrial Design Eindhoven University of Technology Netherlands Duncan of Jordanstone College of Art and Design University of Dundee United Kingdom

ISBN: (纸本)9781450353793

Rehabilitation 1 exercises following stroke are by necessity repetitive and consequently can be tedious for patients. Hospitals are set up with equipment such as clothes pegs, wooden blocks and mechanical hand counters, which patients use to re-learn how to manipulate objects. The aim of this study is to understand the context of stroke patients rehabilitation as well as which types of feedback are most appropriate for patients when performing their rehabilitation exercises. Over 60 hours were spent observing stroke patients undergoing rehabilitation. Fourteen stroke patients who had attended a balance class were interviewed about their experiences and the feedback they received. From this fieldwork, a set of design guidelines has been developed to guide researchers and designers developing computer-based equipment for stroke patient rehabilitation. © 2017 Association for Computing Machinery. All rights reserved.

关键词： User centered design

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