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Conference on Lasers and Electro-Optics Pacific Rim

作者： K. Cook J. Canning S. Bandyopadhyay M. Lancry C. Martelli T. Jin A. Csipkes interdisciplinary Photonics Laboratories (iPL) School of Electrical and Data Engineering University of Technology Sydney Broadway NSW 2007 & School of Chemistry The University of Sydney NSW 2006 Australia Fibre Optics and Photonics Division Central Glass and Ceramic Research Institute Council of Scientific and Industrial Research (CSIR) Kolkata 700032 India Institut de Chimie Moléculaire et des Matériaux d'Orsay UMR CNRS-UPS 8182 Université Paris Sud Orsay France Graduate School of Electrical Engineering and Applied Computer Science Federal University of Technology Paraná Curitiba PR 80230-901 Brazil No 23 Anningzhuang E Rd Haidian L1 Bldg 2 YinYan Mansion Beijing China Technica Optical Components LLC 3657 Peachtree Rd NE Suite 10A Atlanta GA 30319 USA

Various types of high temperature fibre Bragg gratings (FBGs) for sensing applications, are briefly reviewed, discussing their various figures of merit and performance.

ISBN: (纸本)9781509062904

Various types of high temperature fibre Bragg gratings (FBGs) for sensing applications, are briefly reviewed, discussing their various figures of merit and performance.

关键词： Aluminum oxide Femtosecond lasers Fiber devices Photonic crystal fibers Ultrafast lasers Ultraviolet lasers

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Experimental demonstration of outdoor 2.2 Tbps super-channel FSO transmission system

Experimental demonstration of outdoor 2.2 Tbps super-channel...

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IEEE International Conference on Communications Workshops, ICC

作者： Maged Abdullah Esmail Amr Ragheb Habib Fathallah Mohamed-Slim Alouini KACST-TIC in Radio Frequency and Photonics for the e-Society (RFTONICS) King Saud University (KSU) Riyadh Saudi Arabia Computer Electrical and Mathematical Sciences and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST)

Free space optic (FSO) is a wireless technology that promises high speed data rate with low deployment cost. Next generation wireless networks require more bandwidth which is not supported by todays wireless techniques. FSO can be a potential candidate for last mile bottle neck in wireless network and for many other applications. In this paper, we experimentally demonstrate a high speed FSO system using super-channel source and multi-format transmitter. The FSO system was installed outdoor on the building roof over 11.5 m distance and built using off-the-shelf components. We designed a comb source capable of generating multi-subcarriers with flexible spacing. Also we designed a multi-format transmitter capable of generating different complex modulation schemes. For single carrier transmission, we were able to transmit a 23 Gbaud 16-QAM signal over FSO link, achieving 320 Gbps with 6 b/s/Hz spectral efficiency. Then using our super-channel system, 12 equal gain subcarriers are generated and modulated by a DP-16QAM signal with different symbol rates. We achieved maximum symbol rate of 23 Gbaud (i.e. 2.2 Tbps) and spectral efficiency of 7.2 b/s/Hz.

关键词： Optical transmitters Modulation Wavelength division multiplexing High-speed optical techniques Bandwidth Lasers Radio frequency

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Electronically tunable coaxial right / left handed transmission line for carbon fibre reinforced polymer waveguides 45

Electronically tunable coaxial right / left handed transmiss...

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45th European Microwave Conference, EuMC 2015

作者： Nicholson, Kelvin J. Clough, Jake Ghorbani, Kamran Aerospace Division Defence Science and Technology Organisation Melbourne Australia School of Electrical and Computer Engineering RMIT University Melbourne Australia

ISBN: (纸本)9782874870392

The Slotted Waveguide Antenna Stiffened Structure (SWASS) utilizes conventional carbon fiber reinforced polymer (CFRP) blade stiffeners in aircraft sandwich structures as microwave waveguides. Slotted waveguide antenna arrays may therefore be integrated into the CFRP structure by machining slots through the outer skin. This work presents a simple addition to the SWASS concept that permits electronic control over the propagating mode in a slotted CFRP waveguide for the purpose of beam steering. This is achieved using a varactor loaded coaxial composite right / left handed transmission line (CRLH-TL) with integrated bias circuit. The proposed CRLH-TL does not require a perfect electrical connection to the outer coaxial conductor and is therefore ideally suited to CFRP waveguides. © 2015 EuMA.

关键词： Slot antennas

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Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton-proton collisions

arXiv

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arXiv 2020年

作者： Aad, G. Abbott, B. Abbott, D.C. Abed Abud, A. Abeling, K. Abhayasinghe, D.K. Abidi, S.H. AbouZeid, O.S. Abraham, N.L. Abramowicz, H. Abreu, H. Abulait, Y. Acharya, B.S. Achkar, B. Adam, L. Adam Bourdarios, C. Adamczyk, L. Adamek, L. Adelman, J. Adersberger, M. Adiguzel, A. Adorni, S. Adye, T. Affolder, A.A. Afik, Y. Agapopoulou, C. Agaras, M.N. Aggarwal, A. Agheorghiesei, C. Aguilar-Saavedra, J.A. Ahmad, A. Ahmadov, F. Ahmed, W.S. Ai, X. Aielli, G. Akatsuka, S. Akbiyik, M. Akesson, T.P.A. Akilli, E. Akimov, A.V. Al Khoury, K. Alberghi, G.L. Albert, J. Alconada Verzini, M.J. Alderweireldt, S. Aleksa, M. Aleksandrov, I.N. Alexa, C. Alexopoulos, T. Alfonsi, A. Alfonsi, F. Alhroob, M. Ali, B. Ali, S. Aliev, M. Alimonti, G. Allaire, C. Allbrooke, B.M.M. Allen, B.W. Allport, P.P. Aloisio, A. Alonso, F. Alpigiani, C. Ambler, A. Ambroz, L. Amelung, C. Amidei, D. Amor Dos Santos, S.P. CPPM Aix-Marseille Universite CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma NormanOK United States Department of Physics University of Massachusetts AmherstMA United States CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universitat Gottingen Gottingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto TorontoON Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Department of Physics King's College London London United Kingdom Institut fur Physik Universitat Mainz Mainz Germany Fysiska Institutionen Lunds Universitet Lund Sweden Departement de Physique Nucleaire et Corpusculaire Universite de Geneve Geneve Switzerland LAPP Universite Grenoble Alpes Universite Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalbIL United States Fakultat fur Physik Ludwig-Maximilians-Universitat Munchen Munchen Germany Department of Physics Bogazici University Istanbul Turkey Istanbul University Dept. of Physics Istanbul Turkey Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa CruzCA United States CLab Universite Paris-Saclay CNRS/IN2P3 Orsay91405 France LPC Universite Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Laboratorio de Instrumentacao e Fisica Experimental de Particula

Jet substructure has provided new opportunities for searches and measurements at the LHC, and has seen continuous development since the optimization of the large-radius jet definition used by ATLAS was performed during Run 1. A range of new inputs to jet reconstruction, pile-up mitigation techniques and jet grooming algorithms motivate an optimisation of large-radius jet reconstruction for ATLAS. In this paper, this optimisation procedure is presented, and the performance of a wide range of large-radius jet definitions is compared. The relative performance of these jet definitions is assessed using metrics such as their pileup stability, ability to identify hadronically decaying W bosons and top quarks with large transverse momenta. A new type of jet input object, called a 'unified flow object' is introduced which combines calorimeter- and inner-detector-based signals in order to achieve optimal performance across a wide kinematic range. Large-radius jet definitions are identified which significantly improve on the current ATLAS baseline definition, and their modelling is studied using pp collisions recorded by the ATLAS detector at p s = 13 TeV during 2017. © 2020, CC BY.

关键词： Bosons

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Evidence of energy and charge sign dependence of the recovery time for the december 2006 forbush event measured by the pamela experiment

arXiv

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arXiv 2018年

作者： Munini, R. Boezio, M. Bruno, A. Christian, E.C. de Nolfo, G.A. Di Felice, V. Martucci, M. Merge, M. Richardson, I.G. Ryan, J.M. Stochaj, S. Adriani, O. Barbarino, G.C. Bazilevskaya, G.A. Bellotti, R. Bongi, M. Bonvicini, V. Bottai, S. Cafagna, F. Campana, D. Carlson, P. Casolino, M. Castellini, G. de Santis, C. Galper, A.M. Karelin, A.V. Koldashov, S.V. Koldobskiy, S. Krutkov, S.Y. Kvashnin, A.N. Leonov, A. Malakhov, V. Marcelli, L. Mayorov, A.G. Menn, W. Mikhailov, V.V. Mocchiutti, E. Monaco, A. Mori, N. Osteria, G. Panico, B. Papini, P. Pearce, M. Picozza, P. Ricci, M. Ricciarini, S.B. Simon, M. Sparvoli, R. Spillantini, P. Stozhkov, Y.I. Vacchi, A. Vannuccini, E. Vasilyev, G. Voronov, S.A. Yurkin, Y.T. Zampa, G. Zampa, N. Potgieter, M.S. INFN Sezione di Trieste TriesteI-34149 Italy INFN Sezione di Bari BariI-70126 Italy Heliophysics Division NASA Goddard Space Flight Ctr GreenbeltMD United States INFN Sezione di Rome "Tor Vergata" RomeI-00133 Italy Science Data Center FrascatiI-00044 Italy University of Rome "Tor Vergata" Department of Physics RomeI-00133 Italy INFN Laboratori Nazionali di Frascati Via Enrico Fermi 40 FrascatiI-00044 Italy GPHI and Department of Astronomy University of Maryland College Park United States Space Science Center University of New Hampshire DurhamNH United States Electrical and Computer Engineering New Mexico State University Las CrucesNM United States University of Florence Department of Physics Sesto FiorentinoFlorenceI-50019 Italy INFN Sezione di Florence Sesto FiorentinoFlorenceI-50019 Italy University of Naples "Federico II" Department of Physics NaplesI-80126 Italy INFN Sezione di Naples NaplesI-80126 Italy Lebedev Physical Institute MoscowRU-119991 Russia University of Bari Department of Physics BariI-70126 Italy KTH Department of Physics Oskar Klein Centre for Cosmoparticle Physics AlbaNova University Centre StockholmSE-10691 Sweden RIKEN Advanced Science Institute Wako-shiSaitama Japan IFAC Sesto FiorentinoFlorenceI-50019 Italy National Research Nuclear University MEPhI MoscowRU-115409 Russia Ioffe Physical Technical Institute St. PetersburgRU-194021 Russia Universität Siegen Department of Physics SiegenD-57068 Germany University of Udine Department of Mathematics and Informatics UdineI-33100 Italy INFN Sezione di Florence Sesto Fiorentino FlorenceItalI-50019 Italy North-West University Centre for Space Research Potchefstroom2520 South Africa

New results on the short-term galactic cosmic ray (GCR) intensity variation (Forbish decrease) in December 2006 measured by the PAMELA instrument are presented. Forbush decreases are sudden suppressions of the GCR intensities which are associated with the passage of interplanetary transients such as shocks and interplanetary coronal mass ejections (ICMEs). Most of the past measurements of this phenomenon were carried out with ground-based detectors such as neutron monitors or muon telescopes. These techniques allow only the indirect detection of the overall GCR intensity over an integrated energy range. For the first time, thanks to the unique features of the PAMELA magnetic spectrometer, the Forbush decrease commencing on 2006 December 14, following a CME at the Sun on 2006 December 13 was studied in a wide rigidity range (0.4 − 20 GV) and for different species of GCRs detected directly in space. The daily averaged GCR proton intensity was used to investigate the rigidity dependence of the amplitude and the recovery time of the Forbush decrease. Additionally, for the first time, the temporal variations in the helium and electron intensities during a Forbush decrease were studied. Interestingly, the temporal evolutions of the helium and proton intensities during the Forbush decrease were found in good agreement, while the low rigidity electrons ( Copyright © 2018, The Authors. All rights reserved.

关键词： Rigidity

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Control of Power Conditioning System Applying Full Bridge Type Modular Multilevel Converter

Control of Power Conditioning System Applying Full Bridge Ty...

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International Conference on electrical Machines and Systems

作者： Shin-ichi Hamasaki Ryohei Nakata Takahiro Honda Mineo Tsuji Division of Electrical Engineering and Computer Science Nagasaki University 1-14 Bunkyo-machi Nagasaki Japan

ISBN: (纸本)9781467388634

The power conditioning system (PCS) is widely used as a grid connected inverter for the photovoltaic system. The PCS applying a circuit construction of the modular multi-level converter (MMC) is investigated. the MMC is focused on as the transformer-less converter to realize light weight and downsizing. And it can be applied to a high voltage and high power converter with less distorted output by multi-level waveforms. it can be expected to apply for the mega solar system. The feature of the system is that output voltage becomes multilevel waveform for low distortion and the circuit has an energy storage system such as a battery or an super capacitor to compensate surplus or shortage power between input and output and oscillation of capacitor voltage. In this paper, the proposed PCS is introduced and the control method for the system is proposed. Effectiveness of the proposed system are verified by the simulation in typical cases.

关键词： Power conditioning system Modular multilevel converter Photovoltaic Energy storage

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Control of Full Bridge Type Modular Multilevel Converter for Single Phase AC/AC Conversion

Control of Full Bridge Type Modular Multilevel Converter for...

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International Conference on electrical Machines and Systems

作者： Shin-ichi Hamasaki Koki Hadano Shunsuke Eguchi Mineo Tsuji Division of Electrical Engineering and Computer Science Nagasaki University 1-14 Bunkyo-machi Nagasaki Japan

ISBN: (纸本)9781467388634

The Modular Multilevel Converter (MMC) with cascaded full bridge cells enables the multi-level output and has the big merit that the system is not required the transformers when it is used as a distributed power supply in high voltage system. The control method of the MMC for single phase AC-AC conversion system investigated in this study. The full bridge type MMC, which is expanded from the halfbridge type MMC and has 4 arm modules with multi-cells, is provided for AC-AC conversion. The control method of the system is theoretically analyzed. In the proposed control, the capacitor voltage control of the cells, the loop current control and the output voltage command can realize for the objective operation. And effectiveness of the proposed control method is presented by simulation results in typical cases.

关键词： modular multilevel converter AC/AC converter voltage balance control

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Deadbeat Control for Unified Power Flow Controller with 3-phase Unbalanced Compensation

Deadbeat Control for Unified Power Flow Controller with 3-ph...

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International Conference on electrical Machines and Systems

作者： Shin-ichi Hamasaki Shohei Tokumaru Tsuyoshi Takaki Mineo Tsuji Division of Electrical Engineering and Computer Science Nagasaki University 1-14 Bunkyo-machi Nagasaki Japan

ISBN: (纸本)9781467388634

Flexible AC Transmission System (FACTS) is applied to manage a number of varied situations of the power line. The Unified Power Flow Controller (UPFC) as one of the FACTS is used in order to keep conditions of the power line. The UPFC consists of two components. One is connected in parallel to the power line, and the other is connected in series. By the parallel system, the reactive power and 3-phase unbalance can be compensated to improve the power factor and to keep the common DC capacitor voltage constant. By the series component, the voltage drop can be compensated to maintain proper line voltage. In these operations, quick response is required in order to respond variable situations. In this study, the deadbeat (DB) control is applied for the advantage of quick response and easy setting without the gain design. The principle of the DB control, simulation results, and experimental results are presented for verification of its characteristics in this paper.

关键词： Power flow controller Deadbeat control 3-phase unbalance compensation Voltage drop compensation

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Cross-plane thermal conductivity of (Ti,W)N/(Al,Sc)N metal/semiconductor superlattices

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physical Review B 2016年第4期93卷 045311-045311页

作者： Bivas Saha Yee Rui Koh Jonathan Comparan Sridhar Sadasivam Jeremy L. Schroeder Magnus Garbrecht Amr Mohammed Jens Birch Timothy Fisher Ali Shakouri Timothy D. Sands School of Materials Engineering Purdue University West Lafayette Indiana 47907 USA Birck Nanotechnology Center Purdue University West Lafayette Indiana 47907 USA School of Electrical and Computer Engineering Purdue University West Lafayette Indiana 47907 USA School of Mechanical Engineering Purdue University West Lafayette Indiana 47907 USA Thin Film Physics Division Department of Physics Chemistry and Biology (IFM) Linköping University SE-581 83 Linköping Sweden Bradley Department of Electrical and Computer Engineering and Department of Materials Science and Engineering Virginia Tech Blacksburg Virginia 24061 USA

Reduction of cross-plane thermal conductivity and understanding of the mechanisms of heat transport in nanostructured metal/semiconductor superlattices are crucial for their potential applications in thermoelectric and thermionic energy conversion devices, thermal management systems, and thermal barrier coatings. We have developed epitaxial (Ti,W)N/(Al,Sc)N metal/semiconductor superlattices with periodicity ranging from 1 nm to 240 nm that show significantly lower thermal conductivity compared to the parent TiN/(Al,Sc)N superlattice system. The (Ti,W)N/(Al,Sc)N superlattices grow with [001] orientation on the MgO(001) substrates with well-defined coherent layers and are nominally single crystalline with low densities of extended defects. Cross-plane thermal conductivity (measured by time-domain thermoreflectance) decreases with an increase in the superlattice interface density in a manner that is consistent with incoherent phonon boundary scattering. Thermal conductivity values saturate at 1.7Wm−1K−1 for short superlattice periods possibly due to a delicate balance between long-wavelength coherent phonon modes and incoherent phonon scattering from heavy tungsten atomic sites and superlattice interfaces. First-principles density functional perturbation theory based calculations are performed to model the vibrational spectrum of the individual component materials, and transport models are used to explain the interface thermal conductance across the (Ti,W)N/(Al,Sc)N interfaces as a function of periodicity. The long-wavelength coherent phonon modes are expected to play a dominant role in the thermal transport properties of the short-period superlattices. Our analysis of the thermal transport properties of (Ti,W)N/(Al,Sc)N metal/semiconductor superlattices addresses fundamental questions about heat transport in multilayer materials.

关键词： Phonon Heat transport transport properties Transportation models Interfaces Thermal Conductivity extended defects Thermal barrier coatings superlattices Interface

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A first approach on fault detection and isolation for cardiovascular anomalies detection

A first approach on fault detection and isolation for cardio...

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2015 American Control Conference, ACC 2015

作者： Diaz Ledezma, F. Laleg-Kirati, T.M. Mechanical Engineering Department King Abdullah University of Science and Technology Saudi Arabia Computer Electrical and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology Saudi Arabia

ISBN: (纸本)9781479986842

In this paper, we use an extended version of the cardiovascular system's state space model presented by [1] and propose a fault detection and isolation methodology to study the problem of detecting cardiovascular anomalies that can originate from variations in physiological parameters and deviations in the performance of the heart's mitral and aortic valves. An observer-based approach is discussed as the basis of the method. The approach contemplates a bank of Extended Kalman Filters to achieve joint estimation of the model's states and parameters and to detect malfunctions in the valves' performance. © 2015 American Automatic Control Council.

关键词： Fault detection

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