检索结果-内蒙古大学图书馆

Corrigendum: Hyperuniformity variation with quasicrystal local isomorphism class

Journal of physics. Condensed matter : an Institute of physics journal 2017年第47期29卷 2017 Aug 8页

作者： C Lin P J Steinhardt S Torquato Department of Physics Princeton University Princeton NJ 08544 United States of America. Princeton Center for Theoretical Science Princeton University Princeton NJ 08544 United States of America. Department of Chemistry Princeton University Princeton NJ 08544 United States of America. Program of Applied and Computational Mathematics Princeton University Princeton NJ 08544 United States of America. Princeton Institute for the Science and Technology of Materials Princeton University Princeton NJ 08544 United States of America.

来源：评论

学校读者我要写书评

暂无评论

The atacama cosmology telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

arXiv

引用

arXiv 2019年

作者： Madhavacheril, Mathew S. Hill, J. Colin Nss, Sigurd Addison, Graeme E. Aiola, Simone Baildon, Taylor Battaglia, Nicholas Bean, Rachel Bond, J. Richard Calabrese, Erminia Calafut, Victoria Choi, Steve K. Darwish, Omar Devlin, Mark J. Dunkley, Joanna Dunner, Rolando Ferraro, Simone Gallardo, Patricio A. Halpern, Mark Han, Dongwon Hasseleld, Matthew Hilton, Matt Hincks, Adam D. Hlozek, Renee Ho, Shuay-Pwu Patty Huffenberger, Kevin M. Hughes, John P. Koopman, Brian J. Kosowsky, Arthur Lokken, Martine Louis, Thibaut Lungu, Marius MacInnis, Amanda Maurin, Loic McMahon, Jeffrey J. Moodley, Kavilan Nati, Federico Niemack, Michael D. Page, Lyman A. Partridge, Bruce Robertson, Naomi Sehgal, Neelima Schaan, Emmanuel Schillaci, Alessandro Sherwin, Blake D. Sifon, Cristobal Simon, Sara M. Spergel, David N. Staggs, Suzanne T. Storer, Emilie R. van Engelen, Alexander Vavagiakis, Eve M. Wollack, Edward J. Xu, Zhilei Centre for the Universe Perimeter Institute for Theoretical Physics WaterlooONN2L2Y5 Canada Department of Astrophysical Sciences Princeton University 4 Ivy Lane PrincetonNJ08544 United States Department of Physics Columbia University 550 West 120th Street New YorkNY10027 United States Center for Computational Astrophysics Flatiron Institute 162 5th Avenue New YorkNY10010 United States School of Natural Sciences Institute for Advanced Study PrincetonNJ08540 United States Department of Physics and Astronomy Johns Hopkins University BaltimoreMD21218 United States Department of Physics University of Michigan Ann Arbor48103 United States Department of Astronomy Cornell University IthacaNY14853 United States Canadian Institute for Theoretical Astrophysics University of Toronto 60 St. George St. TorontoONM5S3H8 Canada School of Physics and Astronomy Cardiff University Parade CardiffCF243AA United Kingdom Department of Applied Mathematics and Theoretical Physics University of Cambridge Wilberforce Road CambridgeCB30WA United Kingdom Department of Physics and Astronomy University of Pennsylvania 209 South 33rd Street PhiladelphiaPA19104 United States Joseph Henry Laboratories of Physics Jadwin Hall Princeton University PrincetonNJ08544 United States Instituto de Astrofisica Centro de Astro-Ingenieria Facultad de Fisica Ponticia Universidad Catolica de Chile Av. Vicuna Mackenna 4860 Macul Santiago7820436 Physics Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Physics Cornell University 109 Clark Hall IthacaNY14853 United States Department of Physics and Astronomy University of British Columbia VancouverBCV6T1Z1 Canada Physics and Astronomy Department Stony Brook University Stony BrookNY11794 United States Astrophysics & Cosmology Research Unit School of Mathematics Statistics & Computer Science University of KwaZulu-Natal Westville Campus Durban4041 South Africa Department of A

Optimal analyses of many signals in the cosmic microwave background (CMB) require maplevel extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separation in CMB analyses has been performed exclusively using satellite data. In this paper, we implement a component separation method based on the internal linear combination (ILC) approach which we have designed to optimally account for the anisotropic noise (in the 2D Fourier domain) often found in groundbased CMB experiments. Using this method, we combine multi-frequency data from the Planck satellite and the Atacama Cosmology Telescope Polarimeter (ACTPol) to construct the first widearea, arcminute-resolution component-separated maps (covering ≈ 2100 sq. deg.) of the CMB temperature anisotropy and the thermal Sunyaev-Zel'dovich (tSZ) effect sourced by the inverse-Compton scattering of CMB photons off hot, ionized gas. Our ILC pipeline allows for explicit deprojection of various contaminating signals, including a modified blackbody approximation of the cosmic infrared background (CIB) spectral energy distribution. The cleaned CMB maps will be a useful resource for CMB lensing reconstruction, kinematic SZ cross-correlations, and primordial non-Gaussianity studies. The tSZ maps will be used to study the pressure profiles of galaxies, groups, and clusters through cross-correlations with halo catalogs, with dust contamination controlled via CIB deprojection. The data products described in this paper will be made available on LAMBDA. Copyright © 2019, The Authors. All rights reserved.

关键词： Cosmology

来源：评论

学校读者我要写书评

暂无评论

Weak-lensing mass calibration of ACTPOL sunyaev-zel’dovich clusters with the hyper suprime-cam survey

arXiv

引用

arXiv 2018年

作者： Miyatake, Hironao Battaglia, Nicholas Hilton, Matt Medezinski, Elinor Nishizawa, Atsushi J. More, Surhud Aiola, Simone Bahcall, Neta Bond, J. Richard Calabrese, Erminia Choi, Steve K. Devlin, Mark J. Dunkley, Joanna Dunner, Rolando Fuzia, Brittany Gallardo, Patricio Gralla, Megan Hasselfield, Matthew Halpern, Mark Hikage, Chiaki Hill, J. Colin Hincks, Adam D. Hložek, Renée Huffenberger, Kevin Hughes, John P. Koopman, Brian Kosowsky, Arthur Louis, Thibaut Madhavacheril, Mathew S. McMahon, Jeff Mandelbaum, Rachel Marriage, Tobias A. Maurin, Loïc Miyazaki, Satoshi Moodley, Kavilan Murata, Ryoma Naess, Sigurd Newburgh, Laura Niemack, Michael D. Nishimichi, Takahiro Okabe, Nobuhiro Oguri, Masamune Osato, Ken Page, Lyman Partridge, Bruce Robertson, Naomi Sehgal, Neelima Sherwin, Blake Shirasaki, Masato Sievers, Jonathan Sifón, Cristóbal Simon, Sara Spergel, David N. Staggs, Suzanne T. Stein, George Takada, Masahiro Trac, Hy Umetsu, Keiichi van Engelen, Alex Wollack, Edward J. Institute for Advanced Research Nagoya University Nagoya464-8601 Japan Division of Physics and Astrophysical Science Graduate School of Science Nagoya University Nagoya464-8602 Japan Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States UTIAS University of Tokyo Chiba277-8583 Japan Center for Computational Astrophysics Flatiron Institute New YorkNY10010 United States Department of Astronomy Cornell University IthacaNY14853 United States Department of Astrophysical Sciences Princeton University PrincetonNJ08544 United States Astrophysics & Cosmology Research Unit School of Mathematics Statistics & Computer Science University of KwaZulu-Natal Westville Campus Durban4041 South Africa Department of Physics Princeton University PrincetonNJ08544 United States Canadian Institute for Theoretical Astrophysics University of Toronto TorontoONM5S 3H8 Canada School of Physics and Astronomy Cardiff University The Parade CardiffCF24 3AA United Kingdom Department of Physics and Astronomy University of Pennsylvania PhiladelphiaPA19104 United States Instituto de Astrofísica Centro de Astro-Ingeniería Facultad de Física Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul Santiago7820436 Chile Department of Physics Florida State University TallahasseeFL32306 United States Department of Physics Cornell University IthacaNY14853 United States Department of Astronomy/Steward Observatory University of Arizona 933 N. Cherry Ave. TucsonAZ85721 United States Institute for Gravitation and the Cosmos Pennsylvania State University University ParkPA16802 United States Department of Astronomy and Astrophysics Pennsylvania State University University ParkPA16802 United States Department of Physics and Astronomy University of British Columbia VancouverBCV6T 1Z4 Canada School of Natural Sciences Institute for Advanced Study PrincetonNJ08540 United States Department of Physics University

We present weak-lensing measurements using the first-year data from the Hyper Suprime-Cam Strategic Survey program on the Subaru telescope for eight galaxy clusters selected through their thermal Sunyaev-Zel’dovich (SZ) signal measured at 148 GHz with the Atacama Cosmology Telescope Polarimeter experiment. The overlap between the two surveys in this work is 33.8 square degrees, before masking bright stars. The signal-to-noise ratio of individual cluster lensing measurements ranges from 2.2 to 8.7, with a total of 11.1 for the stacked cluster weak-lensing signal. We fit for an average weak-lensing mass distribution using three different profiles, a Navarro-Frenk-White profile, a dark-matter-only emulated profile, and a full cosmological hydrodynamic emulated profile. We interpret the differences among the masses inferred by these models as a systematic error of 10%, which is currently smaller than the statistical error. We obtain the ratio of the SZ-estimated mass to the lensing-estimated mass (the so-called hydrostatic mass bias (Formula presented), which is comparable to previous SZ-selected clusters from the Atacama Cosmology Telescope and from the Planck Satellite. We conclude with a discussion of the implications for cosmological parameters inferred from cluster abundances compared to cosmic microwave background primary anisotropy measurements. Subject headings: galaxies: clusters: general;gravitational lensing: weak;cosmology: observations Copyright © 2018, The Authors. All rights reserved.

关键词： Cams

来源：评论

学校读者我要写书评

暂无评论

引用

Journal of Allergy and Clinical Immunology: Global 2024年第4期3卷 100326-100326页

作者： Herrmann, Susan Kulkarni, Rishabh Trevenen, Michelle Karuppasamy, Hana Willis, Catherine Berry, Renee Von Ungern-Sternberg, Britta Warrier, Niklesh Li, Ian Murray, Kevin Lucas, Michaela School of Medicine The University of Western Australia Perth Australia Department of Immunology Sir Charles Gairdner Hospital Perth Australia Centre for Applied Statistics School of Physics Mathematics and Computing The University of Western Australia Perth Australia Department of Immunology Fiona Stanley Hospital Perth Australia Department of Anaesthesia and Pain Medicine Perth Children's Hospital Perth Australia Division of Emergency Medicine Anaesthesia and Pain Medicine Medical School The University of Western Australia Perth Australia Institute for Paediatric Perioperative Excellence The University of Western Australia Perth Australia Perioperative Medicine Team Perioperative Care Program Telethon Kids Institute Perth Australia National Centre for Student Equity in Higher Education Curtin University Perth Australia School of Population Health The University of Western Australia Perth Australia

Background: The clinical consequences of an antibiotic allergy label are detrimental, impacting health care delivery and patient outcomes. We assessed hospital inpatients with intent to offer free antibiotic allergy labeling (AAL) assessment within a randomized controlled trial. Objective: We sought to determine the feasibility of establishing an adult antibiotic allergy delabeling service in a Western Australian tertiary public hospital. Methods: Inpatients (N = 1503) with AAL were identified through medical records and screened for eligibility to participate in a randomized controlled trial. Those recruited were randomized to undergo assessment by skin testing ± oral challenge, or direct oral challenge. A control group received usual care. Results: Of the 1503 inpatients with an AAL, 429 (28.5%) were eligible for AAL assessment. The primary excluding factor (1074 [71.5%]) was contraindicated medication use (387 [36.0%]), followed by cognitive impairment (298 [27.9%]). Thirty-nine patients were randomized, of which 20 received allergy testing and 19 usual care;all patients were followed up for 5 years. Older patients were less likely to be eligible (10-year increase: odds ratio, 0.82;95% CI, 0.77-0.88;P < .0001), whereas surgical patients were more likely to be eligible than medical patients (odds ratio, 2.49;95% CI, 1.97-3.16;P < .0001). Conclusions: Antibiotic allergy delabeling in the acute care context is not straightforward. Competing clinical concerns and patient acceptance are some barriers to an inpatient service. Nor is it apparent that inpatient versus outpatient testing is cost saving although select patient groups may benefit. Testing younger people and those with predicted high antibiotic usage will derive maximal individual and health system benefits. © 2024 The Authors

关键词： adult inpatients Antibiotic allergy delabeling drug allergy

来源：评论

学校读者我要写书评

暂无评论

Soft X-ray emissions related to the solar wind charge exchange observed by the X-ray satellite observatories

引用

Journal of physics: Conference Series 2012年第8期388卷

作者： T Ishida T Kanda H Akamatsu T Enoki K Henmi Y Ishisaki Y Ezoe T Ohashi K Shinozaki K Mitsuda H Ohashi L Liu J Wang H Tanuma Department of Physics Tokyo Metropolitan University Hachioji Tokyo 192-0397 Japan Aerospace Research and Development Directorate JAXA Tsukuba Ibaraki 305-8505 Japan Institute of Space and Astronautical Science JAXA Sagamihara Kanagawa 252-5210 Japan Institute of Laser Engineering The University of Electro-Communications Chofu Tokyo 182-8585 Japan Institute of Applied Physics and Computational Mathematics PO Box 8009 Beijing 100088 China

We have observed the emission spectra in collisions of bare and hydrogen-like C and O ions with helium atoms and hydrogen molecules as target gases in the soft X-ray region using a window-less Si(Li) detector at collision energies around 100 keV. Because it is found that the 1s-2p emission is dominant in each spectrum, we indicate that the cascade from the upper states give the large population of the 2p state after the consideration using state-selective capture cross sections calculated by the TC-AOCC method.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Dynamics of Nanosecond Laser Pulse Propagation and of Associated Instabilities in a Magnetized Underdense Plasma

引用

Physical Review Letters 2023年第26期130卷 265101-265101页

作者： W. Yao A. Higginson J.-R Marquès P. Antici J. Béard K. Burdonov M. Borghesi A. Castan A. Ciardi B. Coleman S. N. Chen E. d’Humières T. Gangolf L. Gremillet B. Khiar L. Lancia P. Loiseau X. Ribeyre A. Soloviev M. Starodubtsev Q. Wang J. Fuchs LULI—CNRS CEA UPMC Univ Paris 06: Sorbonne Université École Polytechnique Institut Polytechnique de Paris—F-91128 Palaiseau cedex France Sorbonne Université Observatoire de Paris Université PSL CNRS LERMA F-75005 Paris France Center for Energy Research University of California San Diego 9500 Gilman Drive La Jolla California 92093-0417 USA INRS-EMT 1650 boul Lionel-Boulet Varennes QC J3X 1S2 Canada CNRS LNCMI Univ Toulouse 3 INSA Toulouse Univ Grenoble Alpes EMFL 31400 Toulouse France JIHT Russian Academy of Sciences 125412 Moscow Russia School of Mathematics and Physics The Queen’s University Belfast Belfast United Kingdom CEA DAM DIF F-91297 Arpajon France “Horia Hulubei” National Institute for Physics and Nuclear Engineering RO-077125 Bucharest-Magurele Romania University of Bordeaux CELIA CNRS CEA UMR 5107 F-33405 Talence France Université Paris-Saclay CEA LMCE 91680 Bruyères-le-Châtel France Office National d’Etudes et de Recherches Aérospatiales (ONERA) Palaiseau 91123 France IAP-RAS Nizhny Novgorod 603950 Russia Institute of Applied Physics and Computational Mathematics Beijing 100094 China Department of Electrical and Computer Engineering University of Alberta 9211 116 St. NW Edmonton Alberta T6G 1H9 Canada

The propagation and energy coupling of intense laser beams in plasmas are critical issues in inertial confinement fusion. Applying magnetic fields to such a setup has been shown to enhance fuel confinement and heating. Here we report on experimental measurements demonstrating improved transmission and increased smoothing of a high-power laser beam propagating in a magnetized underdense plasma. We also measure enhanced backscattering, which our kinetic simulations show is due to magnetic confinement of hot electrons, thus leading to reduced target preheating.

关键词： High-energy-density plasmas Indirect drive Laser light absorption in plasmas Laser-plasma interactions Plasma stability

来源：评论

学校读者我要写书评

暂无评论

A fractal model of earthquake occurrence: Theory, simulations and comparisons with the aftershock data

引用

Journal of physics: Conference Series 2011年第1期319卷

作者： Pathikrit Bhattacharya Bikas K Chakrabarti Kamal Department of Earth Sciences Indian Institute of Technology Roorkee Uttarakhand 247 667 India Department of Earth Sciences University of Western Ontario London Ontario N6A 5B7 Canada. (At present) Department of Geosciences Princeton University Guyot Hall Princeton NJ 08544 USA. (From September 2011) Theoretical Condensed Matter Physics Division and Centre for Applied Mathematics and Computational Science Saha Institute of Nuclear Physics Kolkata West Bengal 700064 India

Our understanding of earthquakes is based on the theory of plate tectonics. Earthquake dynamics is the study of the interactions of plates (solid disjoint parts of the lithosphere) which produce seismic activity. Over the last about fifty years many models have come up which try to simulate seismic activity by mimicking plate plate interactions. The validity of a given model is subject to the compliance of the synthetic seismic activity it produces to the well known empirical laws which describe the statistical features of observed seismic activity. Here we present a review of one such, purely geometric, model of earthquake dynamics, namely The Two Fractal Overlap Model. The model tries to emulate the stick-slip dynamics of lithospheric plates with fractal surfaces by evaluating the time-evolution of overlap lengths of two identical Cantor sets sliding over each other. As we show later in the text, some statistical aspects of natural seismicity are naturally captured by this simple model. More importantly, however, this model also reveals a new statistical feature of aftershock sequences which we have verified to be present in nature as well. We show that, both in the model as well as in nature, the cumulative integral of aftershock magnitudes over time is a remarkable straight line with a characteristic slope. This slope is closely related to the fractal geometry of the fault surface that produces most of thee aftershocks. We also go on to discuss the implications that this feature may have in possible predictions of aftershock magnitudes or times of occurrence.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Long term study of the blazar S5 0716+714: investigating a turbulent jet at all wavelengths 38

Long term study of the blazar S5 0716+714: investigating a t...

引用

38th International Cosmic Ray Conference, ICRC 2023

作者： Podobnik, F. Manganaro, M. Jormanainen, J. Lindfors, E. Bonnoli, G. Paoletti, R. Jorstad, S. Kiehlmann, S. Agudo, I. Elsasser, D. Lorey, C. Raiteri, C. Villata, M. Redhead, A.C. Marscher, A. Abe, H. Abe, S. Abhir, J. Acciari, V.A. Aniello, T. Ansoldi, S. Antonelli, L.A. Arbet Engels, A. Arcaro, C. Artero, M. Asano, K. Baack, D. Babić, A. Baquero, A. Barres de Almeida, U. Barrio, J.A. Batković, I. Baxter, J. Becerra González, J. Bednarek, W. Bernardini, E. Bernardos, M. Bernete, J. Berti, A. Besenrieder, J. Bigongiari, C. Biland, A. Blanch, O. Bošnjak, Ž. Burelli, I. Busetto, G. Campoy-Ordaz, A. Carosi, A. Carosi, R. Carretero-Castrillo, M. Castro-Tirado, A.J. Ceribella, G. Chai, Y. Chilingarian, A. Cifuentes, A. Cikota, S. Colombo, E. Contreras, J.L. Cortina, J. Covino, S. D’Amico, G. D’Elia, V. Da Vela, P. Dazzi, F. De Angelis, A. De Lotto, B. Del Popolo, A. Delfino, M. Delgado, J. Delgado Mendez, C. Depaoli, D. Di Pierro, F. Di Venere, L. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Elsaesser, D. Emery, G. Escudero, J. Fariña, L. Fattorini, A. Foffano, L. Font, L. Fröse, S. Fukami, S. Fukazawa, Y. García López, R.J. Garczarczyk, M. Gasparyan, S. Gaug, M. Giesbrecht Paiva, J.G. Giglietto, N. Giordano, F. Gliwny, P. Godinović, N. Grau, R. Green, D. Green, J.G. Hadasch, D. Hahn, A. Hassan, T. Heckmann, L. Herrera, J. Hrupec, D. Hütten, M. Imazawa, R. Inada, T. Iotov, R. Ishio, K. Jiménez Martínez, I. Kerszberg, D. Kluge, G.W. Kobayashi, Y. Kouch, P.M. Kubo, H. Kushida, J. Láinez Lezáun, M. Lamastra, A. Lelas, D. Leone, F. Linhoff, L. Lombardi, S. Longo, F. López-Coto, R. López-Moya, M. López-Oramas, A. Loporchio, S. Lorini, A. Lyard, E. Machado de Oliveira Fraga, B. Majumdar, P. Makariev, M. Maneva, G. Mang, N. Manganaro, M. Mangano, S. Mannheim, K. Mariotti, M. Martínez, M. Martínez-Chicharro, M. Mas-Aguilar, A. Mazin, D. Menchiari, S. Mender, S. Mićanović, S. Miceli, D. Miener, T. Miranda, J.M. Università di Siena INFN Pisa Via Roma 56 SienaI-53100 Italy Faculty of Physics University of Rijeka Radmile Matječić 2 Rijeka51000 Croatia Finnish MAGIC Group Finnish Centre for Astronomy with ESO University of Turku TurkuFI-20014 Finland RomeI-00136 Italy Institute of Astrophysics Foundation for Research and Technology-Hellas HeraklionGR-71110 Greece Instituto de Astrofisica de Andalucia-CSIC Glorieta de la Astronomía Granada18008 Spain Department of Physics Otto-Hahn-Str. 4a Dortmund44227 Germany Hans-Haffner-Sternwarte Naturwissenschaftliches Labor für Schüler am FKG Friedrich-Koenig-Gymnasium WürzburgD-97082 Germany INAF Osservatorio Astrofisico di Torino via Osservatorio 20 Pino TorineseI-10025 Italy Caltech The Division of Physics Mathematics and Astronomy 1200 E California Blvd PasadenaCA91125 United States Institute for Astrophysical Research Boston University 725 Commonwealth Avenue BostonMA02215 United States The University of Tokyo Kashiwa Chiba 277-8582 Japan ETH Zürich ZürichCH-8093 Switzerland Instituto de Astrofísica de Canarias Dpto. de Astrofísica Universidad de La Laguna Tenerife La LagunaE-38200 Spain Università di Udine INFN Trieste UdineI-33100 Italy Max-Planck-Institut für Physik MünchenD-80805 Germany Università di Padova INFN PadovaI-35131 Italy Bellaterra BarcelonaE-08193 Spain Technische Universität Dortmund DortmundD-44221 Germany Zagreb10000 Croatia IPARCOS Institute EMFTEL Department Universidad Complutense de Madrid MadridE-28040 Spain URCA RJ Rio de Janeiro22290-180 Brazil University of Lodz Faculty of Physics and Applied Informatics Department of Astrophysics Lodz90-236 Poland Centro de Investigaciones Energéticas Medioambientales y Tecnológicas MadridE-28040 Spain Departament de Física CERES-IEEC Universitat Autònoma de Barcelona BellaterraE-08193 Spain Università di Pisa INFN Pisa PisaI-56126 Italy Universitat de Barcelona ICCUB IEEC-UB BarcelonaE-08028 S

The blazar S5 0716+714 is an intermediate BL Lacertae object remarkable for its variability in many energy bands. It was discovered by MAGIC in the very-high-energy (VHE) gamma-ray range in 2008. Later in 2015 an impressive electric vector polarization angle (EVPA) swing was detected in connection with a multiwavelength flaring event including the VHE gamma-ray band. This generated interest in further studies of the jet of this source and its electromagnetic emission at all wavelengths. Since then, MAGIC has monitored the source in coordination with other observatories and here we present the long-term study using data from 2015 to 2022 in a MWL context. The data set also includes the extraordinary flaring activity of 2017, so far the historical maximum detected for this source in the optical and VHE gamma-ray band. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Gamma rays

来源：评论

学校读者我要写书评

暂无评论

Results of an implementation of the dual surface method to treat the non-uniqueness in solving acoustic exterior problems using the boundary element method

引用

Proceedings of Meetings on Acoustics 2013年第1期19卷

作者： Ralf Burgschweiger Ingo Schäfer Adel Mohsen Rafael Piscoya Martin Ochmann Bodo Nolte Department II Project Group Computational Acoustics Beuth Hochschule für Technik Berlin University of Applied Sciences Luxemburger Str. 10 Berlin Berlin 13353 Germany Maritime Technology and Research (WTD71/FWG) Federal Armed Forces Underwater Acoustics and Marine Geophysics Research Institute Klausdorfer Weg 2-24 Kiel 24148 Germany Engineering Mathematics & Physics Department Engineering Faculty Cairo University Giza 12613 Egypt Department II Project Group Computational Acoustics Beuth Hochschule für Technik Berlin University of Applied Sciences Luxemburger Str. 10 Berlin 13353 Germany

The problem of non-uniqueness (NU) of the solution of exterior acoustic problems when using the boundary element method (BEM) is well known. Methods like the Burton-Miller technique or the CHIEF method are used to solve this challenge at the expense of more complex procedures for handling hypersingular integrals and/or higher computing times due to higher complexity of the algorithm or additional equations. The dual surface method, commonly used for electromagnetic problems, was adapted for acoustic radiation and scattering problems. The basic principles of methods to solve the NU problem are outlined and results for different models and solution procedures are presented, taking into account quality, solution time and the numerical advantages when using iterative solvers.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The next decade of astroinformatics and astrostatistics

arXiv

引用

arXiv 2019年

作者： Siemiginowska, Aneta Eadie, Gwendolyn Czekala, Ian Feigelson, Eric Ford, Eric B. Kashyap, Vinay Kuhn, Michael Loredo, Tom Ntampaka, Michelle Stevens, Abbie Avelino, Arturo Borne, Kirk Budavari, Tamas Burkhart, Blakesley Cisewski-Kehe, Jessi Civano, Francesca Chilingarian, Igor van Dyk, David A. Fabbiano, Giuseppina Finkbeiner, Douglas P. Foreman-Mackey, Daniel Freeman, Peter Fruscione, Antonella Goodman, Alyssa A. Graham, Matthew Guenther, Hans Moritz Hakkila, Jon Hernquist, Lars Huppenkothen, Daniela James, David J. Law, Casey Lazio, Joseph Lee, Thomas López-Morales, Mercedes Mahabal, Ashish A. Mandel, Kaisey Meng, Xiao-Li Moustakas, John Muna, Demitri Peek, J.E.G. Richards, Gordon Portillo, Stephen K.N. Scargle, Jeff de Souza, Rafael S. Speagle, Joshua S. Stassun, Keivan G. Stenning, David C. Taylor, Stephen R. Tremblay, Grant R. Trimble, Virginia Yanamandra-Fisher, Padma A. Young, C. Alex Center for Astrophysics AAS Working Group on Astroinformatics and Astrostatistics eScience Institute University of Washington SeattleWA98195 United States DIRAC Institute Department of Astronomy University of Washington SeattleWA98195 United States Department of Astronomy University of Washington SeattleWA98195 United States Department of Astronomy University of California BerkeleyCA94720 United States Penn State University University ParkPA16802 United States Center for Astrophysics Harvard & Smithsonian CambridgeMA02138 United States California Institute of Technology PasadenaCA91109 United States Department of Statistical Sciences IthacaNY14853 United States Harvard University CambridgeMA02138 United States Department of Physics & Astronomy Michigan State University East LansingMI48824 United States Department of Astronomy University of Michigan Ann ArborMI48109 United States Booz Allen Hamilton Annapolis JunctionMD United States Department of Applied Mathematics & Statistics Johns Hopkins University BaltimoreMD21218 United States Department of Statistics & Data Science Yale University New HavenCT06511 United States Department of Mathematics Imperial College London SW7 2AZ United Kingdom Flatiron Institute Center for Computational Astrophysics New YorkNY10010 United States Carnegie Mellon University PittsburghPA United States Massachusetts Institute of Technology Kavli Institute for Astrophysics and Space Research CambridgeMA02139 United States Department of Physics & Astronomy Associate Dean of the Graduate School University of Charleston CharlestonSC29424 United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States University of California DavisCA95616 United States TAPIR Group Division of Physics Mathematics & Astronomy California Institute of Technology PasadenaCA91125 United States University of Cambridge CambridgeCB3 0HA United Kingdom Department of Phy

Over the past century, major advances in astronomy and astrophysics have been largely driven by improvements in instrumentation and data collection. With the amassing of high quality data from new telescopes, and especially with the advent of deep and large astronomical surveys, it is becoming clear that future advances will also rely heavily on how those data are analyzed and interpreted. New methodologies derived from advances in statistics, computer science, and machine learning are beginning to be employed in sophisticated investigations that are not only bringing forth new discoveries, but are placing them on a solid footing. Progress in wide-field sky surveys, interferometric imaging, precision cosmology, exoplanet detection and characterization, and many subfields of stellar, Galactic and extragalactic astronomy, has resulted in complex data analysis challenges that must be solved to perform scientific inference. Research in astrostatistics and astroinformatics will be necessary to develop the state-of-the-art methodology needed in astronomy. Overcoming these challenges requires dedicated, interdisciplinary research. We recommend: (1) increasing funding for interdisciplinary projects in astrostatistics and astroinformatics;(2) dedicating space and time at conferences for interdisciplinary research and promotion;(3) developing sustainable funding for long-term astrostatisics appointments;and (4) funding infrastructure development for data archives and archive support, state-of-the-art algorithms, and efficient computing. Copyright © 2019, The Authors. All rights reserved.

关键词： Finance

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：