检索结果-内蒙古大学图书馆

arXiv 2018年

作者： Abramowicz, H. Abt, I. Adamczyk, L. Adamus, M. Aggarwal, R. Andreev, V. Antonelli, S. Aushev, V. Baghdasaryan, A. Begzsuren, K. Behnke, O. Behrens, U. Belousov, A. Bertolin, A. Bloch, I. Bolz, A. Boudry, V. Brandt, G. Brisson, V. Britzger, D. Brock, I. Brook, N.H. Brugnera, R. Bruni, A. Buniatyan, A. Bussey, P.J. Bylinkin, A. Bystritskaya, L. Caldwell, A. Campbell, A.J. Cantun Avila, K.B. Capua, M. Catterall, C.D. Cerny, K. Chekelian, V. Chwastowski, J. Ciborowski, J. Ciesielski, R. Contreras, J.G. Cooper-Sarkar, A.M. Corradi, M. Cvach, J. Dainton, J.B. Daum, K. Dementiev, R.K. Devenish, R.C.E. Diaconu, C. Dobre, M. Dusini, S. Eckerlin, G. Egli, S. Elsen, E. Favart, L. Fedotov, A. Feltesse, J. Fleischer, M. Fomenko, A. Foster, B. Gallo, E. Garfagnini, A. Gayler, J. Geiser, A. Gizhko, A. Gladilin, L.K. Goerlich, L. Gogitidze, N. Golubkov, Yu.A. Gouzevitch, M. Grab, C. Grebenyuk, A. Greenshaw, T. Grindhammer, G. Grzelak, G. Gwenlan, C. Haidt, D. Henderson, R.C.W. J. Hladky Hlushchenko, O. Hochman, D. Hoffmann, D. Horisberger, R. Hreus, T. Huber, F. Ibrahim, Z.A. Iga, Y. Jacquet, M. Janssen, X. Jomhari, N.Z. Jung, A.W. Jung, H. Kadenko, I. Kananov, S. Kapichine, M. Karshon, U. Katzy, J. Kaur, P. Kiesling, C. Kisielewska, D. Klanner, R. Klein, M. Klein, U. Kleinwort, C. Kogler, R. Korzhavina, I.A. Kostka, P. Kotański, A. Kovalchuk, N. Kowalski, H. Kretzschmar, J. Krücker, D. Krüger, K. Krupa, B. Kuprash, O. Kuze, M. Landon, M.P.J. Lange, W. Laycock, P. Lebedev, A. Levchenko, B.B. Levonian, S. Levy, A. Libov, V. Lipka, K. Lisovyi, M. List, B. List, J. Lobodzinski, B. Löhr, B. Lohrmann, E. Longhin, A. Lukina, O.Yu. Makarenko, I. Malinovski, E. Malka, J. Martyn, H.-U. Masciocchi, S. Maxfield, S.J. Mehta, A. Meyer, A.B. Meyer, H. Meyer, J. Mikocki, S. Mohamad Idris, F. Mohammad Nasir, N. Morozov, A. Müller, K. Myronenko, V. Nagano, K. Nam, J.D. Naumann, Th. Newman, P.R. Nicassio, M. Niebuhr, C. Nowak, G. Olsson, J.E. Onderwaater, J. I. Physikalisches Institut der RWTH Aachen Germany Institute of Physics and Technology Ministry of Education and Science of Kazakhstan Almaty Kazakhstan Inter-University Institute for High Energies ULB-VUB Brussels and Universiteit Antwerpen Antwerp Belgium School of Physics and Astronomy University of Birmingham Birmingham United Kingdom INFN Bologna Bologna Italy Physikalisches Institut der Universität Bonn Bonn Germany Bucharest Romania Panjab University Department of Physics Chandigarh India Calabria University Physics Department INFN Cosenza Italy GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany STFC Rutherford Appleton Laboratory Didcot Oxfordshire United Kingdom Institut für Physik TU Dortmund Dortmund Germany Joint Institute for Nuclear Research Dubna Russia CERN Geneva Switzerland Irfu/SPP CE Saclay Gif-sur-Yvette France School of Physics and Astronomy University of Glasgow Glasgow United Kingdom II. Physikalisches Institut Universität Göttingen Göttingen Germany Institut für Experimentalphysik Universität Hamburg Hamburg Germany Deutsches Elektronen-SynchrotronDESY Hamburg Germany Physikalisches Institut Universität Heidelberg Heidelberg Germany Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Krakow Poland AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Jagellonian University Krakow Poland National Centre for Particle Physics Universiti Malaya Kuala Lumpur50603 Malaysia Institute for Nuclear Research National Academy of Sciences Kyiv Ukraine Department of Nuclear Physics National Taras Shevchenko University of Kyiv Kyiv Ukraine Department of Physics University of Lancaster Lancaster United Kingdom Department of Physics University of Liverpool Liverpool United Kingdom School of Physics and Astronomy Queen Mary University of London London United Kingdom Physics and Astronomy Department University

Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in the kinematic range of negative four-momentum transfer squared of the photon 2.5 GeV2≤Q2≤2000 GeV2and Bjorken scaling variable 3·10-5≤xBj≤5·10-2. The combination method accounts for the correlations of the statistical and systematic uncertainties among the different datasets. Perturbative QCD calculations are compared to the combined data. A next-to-leading order QCD analysis is performed using these data together with the combined inclusive deep inelastic scattering cross sections from HERA. The running charm- and beauty-quark masses are determined as mc(mc) = 1.290+0.046-0.041(exp/fit) +0.062-0.014(model) +0.003-0.031(parameterisation) GeV and mb(mb)=4.049+0.104-0.109(exp/fit) +0.090-0.032(model)+0.001-0.031(parameterisation) GeV. Copyright © 2018, The Authors. All rights reserved.

关键词： Germanium alloys

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Construction of KAGRA: An underground gravitational wave observatory

arXiv

引用

arXiv 2017年

作者： Akutsu, T. Ando, M. Araki, S. Araya, A. Arima, T. Aritomi, N. Asada, H. Aso, Y. Atsuta, S. Awai, K. Baiotti, L. Barton, M.A. Chen, D. Cho, K. Craig, K. DeSalvo, R. Doi, K. Eda, K. Enomoto, Y. Flaminio, R. Fujibayashi, S. Fujii, Y. Fujimoto, M.-K. Fukushima, M. Furuhata, T. Hagiwara, A. Haino, S. Harita, S. Hasegawa, K. Hasegawa, M. Hashino, K. Hayama, K. Hirata, N. Hirose, E. Ikenoue, B. Inoue, Y. Ioka, K. Ishizaki, H. Itoh, Y. Jia, D. Kagawa, T. Kaji, T. Kajita, T. Kakizaki, M. Kakuhata, H. Kamiizumi, M. Kanbara, S. Kanda, N. Kanemura, S. Kaneyama, M. Kasuya, J. Kataoka, Y. Kawaguchi, K. Kawai, N. Kawamura, S. Kawazoe, F. Kim, C. Kim, J. Kim, J.C. Kim, W. Kimura, N. Kitaoka, Y. Kobayashi, K. Kojima, Y. Kokeyama, K. Komori, K. Kotake, K. Kubo, K. Kumar, R. Kume, T. Kuroda, K. Kuwahara, Y. Lee, H.-K. Lee, H.-W. Lin, C.-Y. Liu, Y. Majorana, E. Mano, S. Marchio, M. Matsui, T. Matsumoto, N. Matsushima, F. Michimura, Y. Mio, N. Miyakawa, O. Miyake, K. Miyamoto, A. Miyamoto, T. Miyo, K. Miyoki, S. Morii, W. Morisaki, S. Moriwaki, Y. Muraki, Y. Murakoshi, M. Musha, M. Nagano, K. Nagano, S. Nakamura, K. Nakamura, T. Nakano, H. Nakano, M. Nakano, M. Nakao, H. Nakao, K. Narikawa, T. Ni, W.-T. Nonomura, T. Obuchi, Y. Oh, J.J. Oh, S.-H. Ohashi, M. Ohishi, N. Ohkawa, M. Ohmae, N. Okino, K. Okutomi, K. Ono, K. Ono, Y. Oohara, K. Ota, S. Park, J. Peña Arellano, F.E. Pinto, I.M. Principe, M. Sago, N. Saijo, M. Saito, T. Saito, Y. Saitou, S. Sakai, K. Sakakibara, Y. Sasaki, Y. Sato, S. Sato, T. Sato, Y. Sekiguchi, T. Sekiguchi, Y. Shibata, M. Shiga, K. Shikano, Y. Shimoda, T. Shinkai, H. Shoda, A. Someya, N. Somiya, K. Son, E.J. Starecki, T. Suemasa, A. Sugimoto, Y. Susa, Y. Suwabe, H. Suzuki, T. Tachibana, Y. Tagoshi, H. Takada, S. Takahashi, H. Takahashi, R. Takamori, A. Takeda, H. Tanaka, H. Tanaka, K. Tanaka, T. Tatsumi, D. National Astronomical Observatory of Japan Tokyo181-8588 Japan Graduate School of Science University of Tokyo Tokyo113-0033 Japan Department of Physics Graduate School of Science University of Tokyo Tokyo113-0033 Japan Ibaraki305-0801 Japan Earthquake Research Institute University of Tokyo Tokyo113-0032 Japan Department of Physics Graduate School of Science Osaka City University Osaka558-8585 Japan Graduate School of Science and Technology Hirosaki University Aomori036-8561 Japan Department of Physics Graduate School of Science and Engineering Tokyo Institute of Technology Tokyo152-8551 Japan Institute for Cosmic Ray Research University of Tokyo Chiba277-8582 Japan Institute for Cosmic Ray Research University of Tokyo Gifu506-1205 Japan Graduate School of Science Osaka University Osaka560-0043 Japan Department of Physics Sogang University Seoul121-742 Korea Republic of University of Sannio at Benevento BeneventoI-82100 Italy Sezione di Napoli NapoliI-80126 Italy University of Toyama Toyama930-8555 Japan Department of Physics Graduate School of Science Kyoto University Kyoto606-8502 Japan Institute of Physics Academia Sinica Taipei11529 Taiwan University of Toyama Toyama930-8555 Japan Yukawa Institute for Theoretical Physics Kyoto University Kyoto606-8502 Japan Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik HannoverD-30167 Germany Department of Physics and Astronomy Seoul National University Seoul151-742 Korea Republic of Daejeon34055 Korea Republic of Department of Physics Myongji University Yongin449-728 Korea Republic of Department of Computer Simulation Inje University Gimhae-shi50834 Korea Republic of Daejeon34047 Korea Republic of Department of Physical Science Graduate School of Science Hiroshima University Hiroshima903-0213 Japan Department of Applied Physics Graduate School of Science Fukuoka University Fukuoka814-0180 Japan Graduate School of Science and Engineer

Major construction and initial-phase operation of a second-generation gravitational-wave detector KAGRA has been completed. The entire 3-km detector is installed underground in a mine in order to be isolated from background seismic vibrations on the surface. This allows us to achieve a good sensitivity at low frequencies and high stability of the detector. Bare-bones equipment for the interferometer operation has been installed and the first test run was accomplished in March and April of 2016 with a rather simple configuration. The initial configuration of KAGRA is named iKAGRA. In this paper, we summarize the construction of KAGRA, including the study of the advantages and challenges of building an underground detector and the operation of the iKAGRA interferometer together with the geophysics interferometer that has been constructed in the same tunnel. Copyright © 2017, The Authors. All rights reserved.

关键词： Interferometers

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Enhanced robustness of evolving open systems by the bidirectionality of interactions between elements

arXiv

引用

arXiv 2017年

作者： Ogushi, Fumiko Kertész, János Kaski, Kimmo Shimada, Takashi Advanced Institute for Material Research Tohoku University 2-1-1 Katahira Aoba-ku Sendai980-8577 Japan Center for Network Science Central European University Budapest1051 Hungary Institute of Physics Budapest University of Technology and Economics Budapest1111 Hungary Department of Computer Science Aalto University School of Science P.O. Box 15500 Espoo Finland Quantum-Phase Electronics Center Department of Applied Physics Graduate School of Engineering University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Center for Materials research by Information Integration National Institute for Materials Science 1-2-1 Sengen Tsukuba Ibaraki305-0047 Japan

Living organisms, ecosystems, and social systems are examples of complex systems in which robustness against inclusion of new elements is an essential feature. A recently proposed simple model has revealed a general mechanism by which such systems can become robust against inclusion of elements with random interactions when the elements have a moderate number of links. This happens as a result of two opposing effects such that while the inclusion of elements with more interactions makes each individual element more robust against disturbances, it also increases the net impact of the loss of any element in the system. The interaction is, however, in many systems often intrinsically bidirectional like for mutual symbiosis, competition in ecology, and the action-reaction law of Newtonian mechanics, etc. This study reports the strong reinforcement effect of the bidirectionality of the interactions on the robustness of evolving systems. We show that the system with purely bidirectional interactions can grow with two-fold average degree, in comparison with the purely unidirectional system. This drastic shift of the transition point comes from the reinforcement of each node, not from a change in structure of the emergent system. For systems with partially bidirectional interactions we find that the area of the growing phase gets expanded. In the dense interaction regime, there exists an optimum proportion of bidirectional interactions for the growth rate at around 1/3. In the sparsely connected systems, small but finite fraction of bidirectional links can change the system's behaviour from non-growing to growing behaviour. Copyright © 2017, The Authors. All rights reserved.

关键词： Reinforcement

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Strong coherent light amplification with double electro-magnetically induced transparency coherences

arXiv

引用

arXiv 2017年

作者： Wang, Dan Liu, Chao Xiao, Changshun Zhang, Junxiang Alotaibi, Hessa M.M. Sanders, Barry C. Wang, Li-Gang Zhu, Shiyao Department of Physics Zhejiang University Hangzhou310027 China College of Physics and Electronic Engineering Shanxi University Taiyuan030006 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan030006 China Public Authority for Applied Education and Training P.O. Box 23167 Safat13092 Hefei National Laboratory for Physical Sciences Microscale University of Science and Technology of China Hefei230026 China Shanghai Branch CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai201315 China Institute for Quantum Science and Technology University of Calgary AlbertaT2N 1N4 Canada Program in Quantum Information Science Canadian Institute for Advanced Research TorontoONM5G 1M1 Canada Beijing Computational Science Research Center Beijing100084 China

We experimentally demonstrate coherent amplification of probe field in a tripod-type atoms driven by strong coupling, signal and weak probe fields. We suppress linear and nonlin-ear atomic absorptions for resonant and near resonant probe via double electromagnetically induced transparency (DEIT). Combining these advantages of suppressed absorption along with temperature-or atomic-density-controlled transfer of population(ToP) between hyper-fine ground states, we can induce near-resonant amplification of probe through stimulated Raman scattering(SRS) pumped by low-intensity signal field. The increased population dif-ference of initial and final states of SRS due to increased ToP rate, together with reduced absorption at the second EIT window in an optically thick Cesium vapor, gives rise to highly effective coherent amplification. Copyright © 2017, The Authors. All rights reserved.

关键词： Amplification

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Edge states in dynamical superlattices

arXiv

引用

arXiv 2017年

作者： Zhang, Yiqi Kartashov, Yaroslav V. Li, Feng Zhang, Zhaoyang Zhang, Yanpeng Belić, Milivoj R. Xiao, Min Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique Xi’an Jiaotong University Xi’an710049 China Department of Applied Physics School of Science Xi’an Jiaotong University Xi’an710049 China 08860 Spain Institute of Spectroscopy Russian Academy of Sciences Troitsk Moscow Region142190 Russia Department of Physics University of Bath BathBA2 7AY United Kingdom Science Program Texas A&M University at Qatar P.O. Box 23874 Doha Qatar Department of Physics University of Arkansas FayettevilleAR72701 United States National Laboratory of Solid State Microstructures and School of Physics Nanjing University Nanjing210093 China

We address edge states and rich localization regimes available in the one-dimensional (1D) dynamically modulated superlattices, both theoretically and numerically. In contrast to conventional lattices with straight waveguides, the quasi-energy band of infinite modulated superlattice is periodic not only in the transverse Bloch momentum, but it also changes periodically with increase of the coupling strength between waveguides. Due to collapse of quasi-energy bands dynamical superlattices admit known dynamical localization effect. If, however, such a lattice is truncated, periodic longitudinal modulation leads to appearance of specific edge states that exist within certain periodically spaced intervals of coupling constants. We discuss unusual transport properties of such truncated superlattices and illustrate different excitation regimes and enhanced robustness of edge states in them, that is associated with topology of the quasi-energy band. Copyright © 2017, The Authors. All rights reserved.

关键词： Lattice constants

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Collective behavior of active topological solitons, knotted streamlines, and transport of cargo in liquid crystals

arXiv

引用

arXiv 2017年

作者： Sohn, Hayley R.O. Ackerman, Paul J. Boyle, Timothy J. Sheetah, Ghadah H. Fornberg, Bengt Smalyukh, Ivan I. Soft Materials Research Center and Materials Science and Engineering Program University of Colorado BoulderCO80309 United States Department of Physics Department of Electrical Computer and Energy Engineering University of Colorado BoulderCO80309 United States Department of Applied Mathematics University of Colorado BoulderCO80309 United States Renewable and Sustainable Energy Institute National Renewable Energy Laboratory University of Colorado BoulderCO80309 United States

Active colloids and liquid crystals are capable of locally converting the macroscopically-supplied energy into directional motion and promise a host of new applications, ranging from drug delivery to cargo transport at the mesoscale. Here we uncover how topological solitons in liquid crystals can locally transform electric energy to translational motion and allow for the transport of cargo along directions dependent on frequency of the applied electric field. By combining polarized optical video microscopy and numerical modeling that reproduces both the equilibrium structures of solitons and their temporal evolution in applied fields, we uncover the physical underpinnings behind this reconfigurable motion and study how it depends on the structure and topology of solitons. We show that, unexpectedly, the directional motion of solitons with and without the cargo arises mainly from the asymmetry in rotational dynamics of molecular ordering in liquid crystal rather than from the asymmetry of fluid flows, as in conventional active soft matter systems. Copyright © 2017, The Authors. All rights reserved.

关键词： Solitons

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Light, the universe, and everything-12 Herculean tasks for quantum cowboys and black diamond skiers

arXiv

引用

arXiv 2018年

作者： Agarwal, Girish Allen, Roland E. Bezdìková, Iva Boyd, Robert W. Chen, Goong Hanson, Ronald Hawthorne, Dean L. Hemmer, Philip Kim, Moochan B. Kocharovskaya, Olga Lee, David M. Lidström, Sebastian K. Lidström, Suzy Losert, Harald Maier, Helmut Neuberger, John W. Padgett, Miles J. Raizen, Mark Rajendran, Surjeet Rasel, Ernst Schleich, Wolfgang P. Scully, Marlan O. Shchedrin, Gavriil Shvets, Gennady Sokolov, Alexei Svidzinsky, Anatoly Walsworth, Ronald L. Weiss, Rainer Wilczek, Frank Willner, Alan E. Yablonovich, Eli Zheludev, Nikolay Department of Physics and Astronomy Texas A&M University College StationTX77843 United States Department of Physics Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague Brehova 7 Praha 1-Staré mìsto11519 Czech Republic Department of Physics Technical University of Ostrava 17 Listopadu 15 Ostrava-Poruba70833 Czech Republic Department of Physics School of Electrical Engineering and Computer Science University of Ottawa OttawaONK1N6N5 Canada Institute of Optics Department of Physics and Astronomy University of Rochester RochesterNY14627 United States School of Physics and Astronomy University of Glasgow GlasgowG128QQ United Kingdom Department of Mathematics Texas A&M University College StationTX77843 United States Science Program Texas A&M University at Qatar Education City Doha Qatar Texas A&M University College StationTX77843 United States QuTech and Kavli Institute of Nanoscience Delft University of Technology P.O. Box 5046 Delft2600 GA Netherlands Cornell Laboratory of Ornithology Cornell University IthacaNY14850 United States Laboratory of Atomic and Solid State Physics Cornell University IthacaNY14853 United States Department of Electrical & Computer Engineering Texas A&M Energy Institute Texas A&M University TX77843 United States Department of Physics Strathclyde University GlasgowG11XJ United Kingdom Physica Scripta Royal Swedish Academy of Sciences StockholmSE-10405 Sweden Universität Ulm Albert-Einstein-Allee 11 Ulm89081 Germany Institut für Zahlentheorie und Wahrscheinlichkeitstheorie Universität Ulm Albert-Einstein-Allee 11 Ulm89081 Germany Department of Mathematics University of North Texas DentonTX76203-5017 United States College of Natural Sciences University of Texas AustinTX78712 United States Department of Physics University of California BerkeleyCA94720-7300 United States Institut fuer Quantenoptik QUEST-LFS Welfengarten 1 Hannover30167 Germany Hagler Insti

The Winter Colloquium on the physics of Quantum Electronics (PQE) has been a seminal force in quantum optics and related areas since 1971. It is rather mindboggling to recognize how the concepts presented at these conferences have transformed scientific understanding and human society. In January, 2017, the participants of PQE were asked to consider the equally important prospects for the future, and to formulate a set of questions representing some of the greatest aspirations in this broad field. The result is this multi-authored paper, in which many of the world's leading experts address the following fundamental questions: (1) What is the future of gravitational wave astronomy? (2) Are there new quantum phases of matter away from equilibrium that can be found and exploited-such as the time crystal? (3) Quantum theory in uncharted territory: What can we learn? (4) What are the ultimate limits for laser photon energies? (5) What are the ultimate limits to temporal, spatial, and optical resolution? (6) What novel roles will atoms play in technology? (7) What applications lie ahead for nitrogen-vacancy centers in diamond? (8) What is the future of quantum coherence, squeezing, and entanglement for enhanced superresolution and sensing? (9) How can we solve (some of) humanity's biggest problems through new quantum technologies? (10) What new understanding of materials and biological molecules will result from their dynamical characterization with free electron lasers? (11) What new technologies and fundamental discoveries might quantum optics achieve by the end of this century? (12) What novel topological structures can be created and employed in quantum optics? Copyright © 2018, The Authors. All rights reserved.

关键词： Quantum optics

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Evolved Fuzzy NN Control for Discrete-Time Nonlinear Systems

引用

Journal of Circuits, Systems and computers 2019年第1期29卷

作者： Tim Chen A. Babanin Assim Muhammad B. Chapron C. Y. J. Chen Faculty of Information Technology Ton Duc Thang University Ho Chi Minh City Vietnam Department of Engineering College of Engineering and Computer Science Australian National University 95 Daley Road Canberra ACT 2601 Australia Faculty of Industrial Engineering King Saud University P. O. Box 2454 Riyadh 11451 Saudi Arabia Le Laboratoire Interdisciplinaire des Energies Paris Diderot University — Paris 7 5 Rue Thomas Mann 75013 Paris France Electronic Automatic Engineering Centre Industrial Technology Research Institute Chutung Hsinchu 31057 Taiwan R. O. China Applied Physics Research Centre The Papua New Guinea University of Technology Lae 411 Morobe Papua New Guinea

To guarantee the asymptotic stability of discrete-time nonlinear systems, this paper proposes an Evolved Bat Algorithm (EBA) fuzzy neural network (NN) controller. In the evolved fuzzy NN modeling, an NN model and linear differential inclusion (LDI) representation are established for arbitrary nonlinear dynamics. This representation is constructed by the use of sector nonlinearity to convert a nonlinear model to the multiple rule base of the linear model, and a new sufficiency condition to guarantee asymptotic stability in the Lyapunov function is implemented in terms of linear matrix inequalities. The proposed method is an enhancement of existing methods which produces good results.

关键词： Evolved control nonlinear systems neural network

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Searching for a measure of word order freedom 16

Searching for a measure of word order freedom

引用

16th ITAT Conference information Technologies - Applications and Theory, ITAT 2016

作者： Kuboň, Vladislav Lopatková, Markéta Hercig, Tomáš Charles University in Prague Faculty of Mathematics and Physics Institute of Formal and Applied Linguistics Czech Republic Department of Computer Science and Engineering Faculty of Applied Sciences University of West Bohemia Univerzitní 8 Plzeň306 14 Czech Republic NTIS-New Technologies for the Information Society Faculty of Applied Sciences University of West Bohemia Technická 8 Plzeň306 14 Czech Republic

This paper compares various means of measuring of word order freedom applied to data from syntactically annotated corpora for 23 languages. The corpora are part of the HamleDT project, the word order statistics are relative frequencies of all word order combinations of subject, predicate and object both in main and subordinated clauses. The measures include Euclidean distance, max-min distance, entropy and cosine similarity. The differences among the measures are discussed. © 2016 CEUR-WS. All rights reserved.

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Advanced diagnosis of rotor faults in large induction motors based on internal flux measurement

Advanced diagnosis of rotor faults in large induction motors...

引用

Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： Khalid Saad Galina Mirzaeva Department of Electrical Electronic and Information Engineering (DEI) University of Bologna Bologna (BO) Italy Faculty of Physics and Applied Computer Science AGH University of Science and Technology Krakow Poland

ISBN: (纸本)9781479983988

Most of the existing electrical techniques of condition monitoring and fault diagnosis are based on stator current and/or stray flux measurement external to the motor. In this paper we propose a new diagnosis method for rotor bar faults based on flux measurements inside the main air gap of large induction motors. Theoretical analysis is presented, of both healthy motor and a motor with a broken rotor bar. Based on this, the fault detection method is proposed, which utilizes both time and space domain analysis of the air gap flux, to achieve superior rotor fault detection at early stages. The proposed method is demonstrated by extensive simulations. The method is experimentally validated using a specially instrumented laboratory scale induction motor. The prospective applications include large induction motors used in mining machines, in which internal Hall Effect Flux Sensors (HEFS) instrumentation is both feasible and justified.

关键词： Aerospace electronics Rotors Stators Instruments Air gaps Torque Industries

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