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arXiv 2019年

作者： Pretto, Alberto Aravecchia, Stéphanie Burgard, Wolfram Chebrolu, Nived Dornhege, Christian Falck, Tillmann Fleckenstein, Freya Fontenla, Alessandra Imperoli, Marco Khanna, Raghav Liebisch, Frank Lottes, Philipp Milioto, Andres Nardi, Daniele Nardi, Sandro Pfeifer, Johannes Popović, Marija Potena, Ciro Pradalier, Cédric Rothacker-Feder, Elisa Sa, Inkyu Schaefer, Alexander Siegwart, Roland Stachniss, Cyrill Walter, Achim Winterhalter, Wera Wu, Xiaolong Nieto, Juan Department of Computer Control and Management Engineering Sapienza University of Rome Rome Italy International Research Lab 2958 Georgia Tech-CNRS Metz France Department of Computer Science University of Freiburg Germany Toyota Research Institute Los Altos United States Photogrammetry & Robotics Lab University of Bonn Germany Robert Bosch GmbH Corporate Research Renningen Germany Osimo Italy Autonomous Systems Lab. Department of Mechanical and Process Engineering ETH Zurich Zürich Switzerland Department of Environmental Systems Science Institute of Agricultural Sciences ETH Zurich Zürich Switzerland IT+Robotics Srl Padova Italy Smart Robotics Lab. Department of Computing Imperial College London London United Kingdom CSIRO Data61 Australia

The application of autonomous robots in agriculture is gaining increasing popularity thanks to the high impact it may have on food security, sustainability, resource use efficiency, reduction of chemical treatments, and the optimization of human effort and yield. With this vision, the Flourish research project aimed to develop an adaptable robotic solution for precision farming that combines the aerial survey capabilities of small autonomous unmanned aerial vehicles (UAVs) with targeted intervention performed by multi-purpose unmanned ground vehicles (UGVs). This paper presents an overview of the scientific and technological advances and outcomes obtained in the project. We introduce multi-spectral perception algorithms and aerial and ground-based systems developed for monitoring crop density, weed pressure, crop nitrogen nutrition status, and to accurately classify and locate weeds. We then introduce the navigation and mapping systems tailored to our robots in the agricultural environment, as well as the modules for collaborative mapping. We finally present the ground intervention hardware, software solutions, and interfaces we implemented and tested in different field conditions and with different crops. We describe a real use case in which a UAV collaborates with a UGV to monitor the field and to perform selective spraying without human intervention. Copyright © 2019, The Authors. All rights reserved.

关键词： Mapping

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Another Shipment of Six Short-Period Giant Planets from TESS

arXiv

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arXiv 2022年

作者： Rodriguez, Joseph E. Quinn, Samuel N. Vanderburg, Andrew Zhou, George Eastman, Jason D. Thygesen, Erica Cale, Bryson Ciardi, David R. Reed, Phillip A. Oelkers, Ryan J. Collins, Karen A. Bieryla, Allyson Latham, David W. Gonzales, Erica J. Gaudi, B. Scott Hellier, Coel Jones, Matías I. Brahm, Rafael Sokolovsky, Kirill Schulte, Jack Srdoc, Gregor Kielkopf, John Horta, Ferran Grau Massey, Bob Evans, Phil Stephens, Denise C. McLeod, Kim K. Chazov, Nikita Krushinsky, Vadim Ghachoui, Mourad Safonov, Boris S. Dedrick, Cayla M. Conti, Dennis Laloum, Didier Giacalone, Steven Ziegler, Carl Serra, Pere Guerra Nogues, Ramon Naves Murgas, Felipe Michaels, Edward J. Ricker, George R. Vanderspek, Roland K. Seager, Sara Winn, Joshua N. Jenkins, Jon M. Addison, Brett Alfaro, Owen Anderson, D.R. Aydi, Elias Beatty, Thomas G. Bedding, Timothy R. Belinski, Alexander A. Benkhaldoun, Zouhair Berlind, Perry Blake, Cullen H. Bowen, Michael J. Bowler, Brendan P. Boyle, Andrew W. Branson, Dalton Briceño, César Calkins, Michael L. Campbell, Emma Christiansen, Jessie L. Chomiuk, Laura Collins, Kevin I. Cornachione, Matthew A. Daassou, Ahmed Dressing, Courtney D. Esquerdo, Gilbert A. Feliz, Dax L. Fong, William Fukui, Akihiko Gan, Tianjun Gill, Holden Goliguzova, Maria V. Hansen, Jarrod Henning, Thomas Hintz, Eric G. Hobson, Melissa J. Horner, Jonathan Huang, Chelsea X. James, David J. Jensen, Jacob S. Johnson, Samson A. Jordán, Andrés Kane, Stephen R. Barkaoui, Khalid Kim, Myung-Jin Kim, Kingsley Kuhn, Rudolf B. Law, Nicholas Lewin, Pablo Liu, Hui-Gen Lund, Michael B. Mann, Andrew W. McCrady, Nate Mengel, Matthew W. Mink, Jessica Murphy, Lauren G. Narita, Norio Newman, Patrick Okumura, Jack Osborn, Hugh P. Paegert, Martin Palle, Enric Pepper, Joshua Plavchan, Peter Popov, Alexander A. Rabus, Markus Ranshaw, Jessica Rodriguez, Jennifer A. Roh, Dong-Goo Reefe, Michael A. Savel, Arjun B. Schwarz, Richard P. Shporer, Avi Siverd, Robert J. Sliski, David H. Stassun, Keivan G. Stevens, Daniel J. Soubkiou, Abderahmane Ting, Eric B. Tinney, C.G. Vow Center for Data Intensive and Time Domain Astronomy Department of Physics and Astronomy Michigan State University East LansingMI48824 United States Center for Astrophysics | Harvard & Smithsonian 60 Garden St CambridgeMA02138 United States Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States Centre for Astrophysics University of Southern Queensland West Street ToowoombaQLD4350 Australia Caltech IPAC NASA Exoplanet Science Institute 1200 E. California Ave PasadenaCA91125 United States Department of Physical Sciences Kutztown University KutztownPA19530 United States George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy Texas A&M University College StationTX77843 United States Charles R. & Judith G. Munnerlyn Astronomical Laboratory Department of Physics & Astronomy Texas A&M University College StationTX77843 United States Center for Gravitational Wave Astronomy The University of Texas Rio Grande Valley BrownsvilleTX78520 United States Department of Astronomy and Astrophysics University of California Santa CruzCA95064 United States Department of Astronomy The Ohio State University 140 West 18th Avenue ColumbusOH43210 United States Astrophysics Group Keele University StaffordshireST5 5BG United Kingdom European Southern Observatory Alonso de Córdova 3107 Vitacura Casilla Santiago19001 Chile Facultad de Ingeniería y Ciencias Universidad Adolfo Ibáñez Av. Diagonal las Torres 2640 Peñalolén Santiago Chile Millennium Institute for Astrophysics Chile Data Observatory Foundation Chile Kotizarovci Observatory Sarsoni 90 Viskovo51216 Croatia Department of Physics and Astronomy University of Louisville LouisvilleKY40292 United States Observatri de Ca l'Ou United States Villa'39 Observatory LandersCA92285 United States El Sauce Observatory Coquimbo Province Chile Department of Physics and Astronomy Brigham Young Un

We present the discovery and characterization of six short-period, transiting giant planets from NASA's Transiting Exoplanet Survey Satellite (TESS) - TOI-1811 (TIC 376524552), TOI-2025 (TIC 394050135), TOI-2145 (TIC 88992642), TOI-2152 (TIC 395393265), TOI-2154 (TIC 428787891), & TOI-2497 (TIC 97568467). All six planets orbit bright host stars (8.9 P = 0.99-1.45 RJ), have masses ranging from 0.92 to 5.26 MJ, and orbit F, G, and K stars (4766 ≤ Teff ≤ 7360 K). We detect a significant orbital eccentricity for the three longest-period systems in our sample: TOI-2025 b (P = 8.872 days, 0.394+0.035..0.038, TOI-2145 b (P = 10.261 days, e = 0.208+0.034-0.047, and TOI-2497 b (P = 10.656 days, e = 0.195+0.043-0.040. TOI-2145 b and TOI-2497 b both orbit subgiant host stars (3.8 +0.38-0.37 MJ (TOI-2145 b) and 4.82 ± 0.41 MJ (TOI-2497 b). These six new discoveries contribute to the larger community effort to use TESS to create a magnitude-complete, self-consistent sample of giant planets with well-determined parameters for future detailed studies. Copyright © 2022, The Authors. All rights reserved.

关键词： Satellites

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Optimal multicast of tiled 360 VR video

arXiv

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arXiv 2018年

作者： Guo, Chengjun Cui, Ying Liu, Zhi Shanghai Institute for Advanced Communication and Data Science Institute of Wireless Communication Technologies Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Mathematical and Systems Engineering Shizuoka University Hamamatsu432-8561 Japan

In this letter, we study optimal multicast of tiled 360 virtual reality (VR) video from one server (base station or access point) to multiple users. We consider random viewing directions and random channel conditions, and adopt time division multiple access (TDMA). For given video quality, w e optimize the transmission time and power allocation to minimize the average transmission energy. For given transmission energy budget, we optimize the transmission time and power allocation as well as the encoding rate of each tile to maximize the received video quality. These two optimization problems are challenging non-convex problems. We obtain globally optimal closed-form solutions of the two non-convex problems, which reveal important design insights for multicast of tiled 360 VR video. Finally, numerical results demonstrate the advantage of the propose d solutions. Copyright © 2018, The Authors. All rights reserved.

关键词： Convex optimization

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Optimal multicast of tiled 360 VR video in OFDMA systems

arXiv

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arXiv 2018年

作者： Guo, Chengjun Cui, Ying Liu, Zhi Institute of Wireless Communication Technologies Shanghai Institute for Advanced Communication and Data Science Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Mathematical and Systems Engineering Shizuoka University Hamamatsu432-8561 Japan

— In this letter, we study optimal multicast of tiled 360 virtual reality (VR) video from one server (base station or access point) to multiple users in an orthogonal frequency division multiple access (OFDMA) system. For given video quality, we optimize the subcarrier, transmission power and transmission rate allocation to minimize the total transmission power. For given transmission power budget, we optimize the subcarrier, transmission power and transmission rate allocation to maximize the received video quality. These two optimization problems are non-convex problems. We obtain a globally optimal closed-form solution and a near optimal solution of the two problems, separately, both revealing important design insights for multicast of tiled 360 VR video in OFDMA systems. Copyright © 2018, The Authors. All rights reserved.

关键词： Orthogonal frequency division multiplexing

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Insights from the first flaring activity of a high-synchrotron-peaked blazar with X-ray polarization and VHE gamma rays

arXiv

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arXiv 2024年

作者： Abe, K. Abe, S. Abhir, J. Abhishek, A. Acciari, V.A. Aguasca-Cabot, A. Agudo, I. Aniello, T. Ansoldi, S. Antonelli, L.A. Engels, A. Arbet Arcaro, C. Asano, K. Babić, A. de Almeida, U. Barres Barrio, J.A. Barrios-Jiménez, L. Batković, I. Baxter, J. González, J. Becerra Bednarek, W. Bernardini, E. Bernete, J. Berti, A. Besenrieder, J. Bigongiari, C. Biland, A. Blanch, O. Bonnoli, G. Bošnjak, Ž. Bronzini, E. Burelli, I. Campoy-Ordaz, A. Carosi, A. Carosi, R. Carretero-Castrillo, M. Castro-Tirado, A.J. Cerasole, D. Ceribella, G. Chai, Y. Chilingarian, A. Cifuentes, A. Colombo, E. Contreras, J.L. Cortina, J. Covino, S. D’Ammando, F. D’Amico, G. Da Vela, P. Dazzi, F. De Angelis, A. De Lotto, B. de Menezes, R. Delfino, M. Delgado, J. Mendez, C. Delgado Di Pierro, F. Di Tria, R. Di Venere, L. Dinesh, A. Prester, D. Dominis Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsaesser, D. Escudero, J. Fariña, L. Foffano, L. Font, L. Fröse, S. Fukazawa, Y. López, R.J. García Garczarczyk, M. Gasparyan, S. Gaug, M. Paiva, J.G. Giesbrecht Giglietto, N. Giordano, F. Gliwny, P. Godinović, N. Gradetzke, T. Grau, R. Green, D. Green, J.G. Günther, P. Hadasch, D. Hahn, A. Hassan, T. Heckmann, L. Llorente, J. Herrera Hrupec, D. Imazawa, R. Israyelyan, D. Itokawa, T. Martínez, I. Jiménez Quiles, J. Jiménez Jormanainen, J. Kankkunen, S. Kayanoki, T. Kerszberg, D. Khachatryan, M. Kluge, G.W. Kobayashi, Y. Konrad, J. Kouch, P.M. Kubo, H. Kushida, J. Láinez, M. Lamastra, A. Lindfors, E. Lombardi, S. Longo, F. López-Coto, R. López-Moya, M. López-Oramas, A. Loporchio, S. Lorini, A. Lyard, E. Majumdar, P. Makariev, M. Maneva, G. Manganaro, M. Mangano, S. Mannheim, K. Mariotti, M. Martínez, M. Maruševec, P. Mas-Aguilar, A. Mazin, D. Menchiari, S. Mender, S. Miceli, D. Miranda, J.M. Mirzoyan, R. González, M. Molero Molina, E. Mondal, H.A. Moralejo, A. Nakamori, T. Nanci, C. Neustroev, V. Nickel, L. Rosillo, M. Nievas Nigro, C. Nikolic, L. Nilsson, K. Nishijima, K. Ekoume, T. Njoh Japanese MAGIC Group Department of Physics Tokai University Kanagawa Hiratsuka259-1292 Japan The University of Tokyo Chiba Kashiwa277-8582 Japan ETH Zürich ZürichCH-8093 Switzerland Università di Siena INFN Pisa SienaI-53100 Italy Barcelona BellaterraE-08193 Spain Universitat de Barcelona ICCUB IEEC-UB BarcelonaE-08028 Spain Instituto de Astrofísica de Andalucía CSIC Glorieta de la Astronomía s/n Granada18008 Spain RomeI-00136 Italy Università di Udine INFN Trieste UdineI-33100 Italy Max-Planck-Institut für Physik GarchingD-85748 Germany Università di Padova INFN PadovaI-35131 Italy Zagreb10000 Croatia URCA RJ Rio de Janeiro22290-180 Brazil IPARCOS Institute EMFTEL Department Universidad Complutense de Madrid MadridE-28040 Spain Instituto de Astrofísica de Canarias Dpto. de Astrofísica Universidad de La Laguna Tenerife La LagunaE-38200 Spain 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 INFN MAGIC Group INFN Sezione di Bari Dipartimento Interateneo di Fisica dell’Università e del Politecnico di Bari BariI-70125 Italy Armenian MAGIC Group A. Alikhanyan National Science Laboratory Yerevan0036 Armenia Department for Physics and Technology University of Bergen Norway INFN MAGIC Group INFN Sezione di Torino Università degli Studi di Torino TorinoI-10125 Italy Croatian MAGIC Group University of Rijeka Faculty of Physics Rijeka51000 Croatia Universität Würzburg WürzburgD-97074 Germany Technische Universität Dortmund DortmundD-44221 Germany Japanese MAGIC Group Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8526 Japan ZeuthenD-15738 Germany Armenian MAGIC Gr

Context. Blazars exhibit strong variability across the entire electromagnetic spectrum, including periods of high-flux states commonly dubbed as flares. The physical mechanisms in blazar jets responsible for flares remain to date poorly understood. Aims. We aim to better understand the emission mechanisms during blazar flares using X-ray polarimetry and broadband observations from the archetypical TeV blazar Mrk 421, which can be studied with higher accuracy than other blazars that are dimmer and/or located farther away. Methods. We study a flaring activity from December 2023 that was characterized from radio to very-high-energy (VHE;E > 0.1 TeV) gamma rays with MAGIC, Fermi-LAT, Swift, XMM-Newton and several optical and radio telescopes. These observations included, for the first time for a gamma-ray flare of a blazar, simultaneous X-ray polarization measurements with IXPE, besides optical and radio polarimetry data. We quantify the variability and correlations among the multi-band flux and polarization measurements, and describe the varying broadband emission within a theoretical scenario constrained by the polarization data. Results. We find substantial variability in both X-rays and VHE gamma rays throughout the campaign, with the highest VHE flux above 0.2 TeV occurring during the IXPE observing window, and exceeding twice the flux of the Crab Nebula. However, the VHE and X-ray spectra are on average softer, and the correlation between these two bands weaker that those reported in previous flares of Mrk 421. IXPE reveals an X-ray polarization degree significantly higher than that at radio and optical frequencies, similar to previous results on Mrk 421 and other high-synchrotron-peaked blazars. Differently to past observations, the X-ray polarization angle varies by ∼100◦ on timescales of days, and the polarization degree changes by more than a factor 4. The highest X-ray polarization degree, analyzed in 12 hrs time intervals, reaches 26 ± 2%, around which an X-

关键词： Gamma rays

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Comments on cut-set bounds on network function computation

Comments on cut-set bounds on network function computation

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作者： Huang, Cupjin Tan, Zihan Yang, Shenghao Guang, Xuan Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States Department of Computer Science University of Chicago ChicagoIL60637 United States School of Science and Engineering Shenzhen Key Laboratory of IoT Intelligent Systems and Wireless Network Technology Chinese University of Hong Kong Shenzhen China Shenzhen Research Institute of Big Data Shenzhen518172 China School of Mathematical Sciences and LPMC Nankai University Tianjin China Institute of Network Coding Chinese University of Hong Kong Hong Kong Hong Kong

A function computation problem over a directed acyclic network has been considered in the literature, where a sink node is required to compute a target function correctly with the inputs arbitrarily generated at multiple source nodes. The network links are error free but capacity limited, and the intermediate nodes perform network coding. The computing rate of a network code is the average number of times that the target function is computed for one use of the network, i.e., each link in the network is used at most once. In the existing papers, two cut-set bounds were proposed on the computing rate. However, we in this paper show that these bounds are not valid for general network function computation problems. We analyze the reason of the invalidity and propose a general cut-set bound by using a new equivalence relation associated with the inputs of the target function. Moreover, some results in the existing papers were proved by applying the invalid upper bound. We also justify the validity of these results. © 1963-2012 IEEE.

关键词： Network coding

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Spinning up a Daze: TESS Uncovers a Hot Jupiter orbiting the Rapid-Rotator TOI-778

arXiv

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arXiv 2022年

作者： Clark, Jake T. Addison, Brett C. Okumura, Jack Vach, Sydney Errico, Adriana Heitzmann, Alexis Rodriguez, Joseph E. Wright, Duncan J. Clerté, Mathieu Brown, Carolyn J. Fetherolf, Tara Wittenmyer, Robert A. Plavchan, Peter Kane, Stephen R. Horner, Jonathan Kielkopf, John F. Shporer, Avi Tinney, C.G. Hui-Gen, Liu Ballard, Sarah Bowler, Brendan P. Mengel, Matthew W. Zhou, George Lee, Annette S. David, Avelyn Heim, Jessica Lee, Michele E. Sevilla, Verónica Zafar, Naqsh E. Hinkel, Natalie R. Allen, Bridgette E. Bayliss, Daniel Berberyan, Arthur Berlind, Perry Bieryla, Allyson Bouchy, François Brahm, Rafael Bryant, Edward M. Christiansen, Jessie L. Ciardi, David R. Ciardi, Krys N. Collins, Karen A. Dallant, Jules Davis, Allen B. Díaz, Matías R. Dressing, Courtney D. Esquerdo, Gilbert A. Harre, Jan-Vincent Howell, Steve B. Jenkins, Jon M. Jensen, Eric L.N. Jones, Matías I. Jordán, Andrés Latham, David W. Lund, Michael B. McCormac, James Nielsen, Louise D. Otegi, Jon Quinn, Samuel N. Radford, Don J. Ricker, George R. Schwarz, Richard P. Seager, Sara Smith, Alexis M.S. Stockdale, Chris Tan, Thiam-Guan Udry, Stéphane Vanderspek, Roland Günther, Maximilian N. Wang, Songhu Wingham, Geof Winn, Joshua N. University of Southern Queensland Centre for Astrophysics USQ Toowoomba West Street QLD4350 Australia Swinburne University of Technology Centre for Astrophysics and Supercomputing John Street HawthornVIC3122 Australia Center for Astrophysics Harvard & Smithsonian 60 Garden St CambridgeMA02138 United States Astronomy Unit Queen Mary University of London Mile End Road LondonE1 4NS United Kingdom Department of Physics and Astronomy Michigan State University East LansingMI48824 United States Department of Earth and Planetary Sciences University of California Riverside 900 University Avenue RiversideCA92521 United States Department of Physics & Astronomy George Mason University 4400 University Drive MS 3F3 FairfaxVA22030 United States Department of Earth and Planetary Sciences University of California RiversideCA92521 United States Department of Physics and Astronomy University of Louisville LouisvilleKY40292 United States Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States Exoplanetary Science UNSW School of Physics UNSW Sydney NSW2052 Australia School of Astronomy and Space Science Key Laboratory of Modern Astronomy and Astrophysics in Ministry of Education Nanjing University Jiangsu Nanjing210046 China Department of Astronomy University of Florida 211 Bryant Space Science Center GainesvilleFL32611 United States Department of Astronomy The University of Texas AustinTX78712 United States The Native Skywatchers Initiative MN United States Department of Physics and Astronomy St. Cloud University MN United States Department of Astronomy and Astrophysics University of California Santa CruzCA95064 United States Jeremiah Horrocks Institute University of Central Lancashire PrestonPR1 2HE United Kingdom Space Science and Engineering Division Southwest Research Institute San AntonioTX78238 United States NASA Exoplanet Science Institute - Ca

NASA’s Transiting Exoplanet Survey Satellite (TESS) mission, has been uncovering a growing number of exoplanets orbiting nearby, bright stars. Most exoplanets that have been discovered by TESS orbit narrow-line, slow-rotating stars, facilitating the confirmation and mass determination of these worlds. We present the discovery of a hot Jupiter orbiting a rapidly rotating (v sin (i) = 35.1 ± 1.0 km s−1) early F3V-dwarf, HD 115447 (TOI-778). The transit signal taken from Sectors 10 and 37 of TESS’s initial detection of the exoplanet is combined with follow-up ground-based photometry and velocity measurements taken from Minerva-Australis, TRES, CORALIE and CHIRON to confirm and characterise TOI-778 b. A joint analysis of the light curves and the radial velocity measurements yield a mass, radius, and orbital period for TOI-778 b of 2.76+0−0.2423 MJ, 1.370 ± 0.043 RJ, and ∼ 4.63 days, respectively. The planet orbits a bright (V = 9.1 mag) F3-dwarf with M = 1.40 ± 0.05 M, R = 1.70 ± 0.05 R, and log g = 4.05 ± 0.17. We observed a spectroscopic transit of TOI-778 b, which allowed us to derive a sky-projected spin-orbit angle of 18◦ ± 11◦, consistent with an aligned planetary system. This discovery demonstrates the capability of smaller aperture telescopes such as Minerva-Australis to detect the radial velocity signals produced by planets orbiting broad-line, rapidly rotating stars. © 2022, CC BY.

关键词： Satellites

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Dynamical Sampling with Additive Random Noise

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Sampling Theory, Signal Processing, and data Analysis 2018年第2期17卷 153-182页

作者： Akram Aldroubi Longxiu Huang Ilya Krishtal Akos Ledeczi Roy R. Lederman Peter Volgyesi Department of Mathematics Vanderbilt University Nashville USA Department of Mathematics Northern Illinois University DeKalb USA Department of Electrical Engineering and Computer Science Vanderbilt University Nashville USA Department of Statistics and Data Science Yale University New Haven USA Institute for Software Integrated Systems Vanderbilt University Nashville USA

Dynamical sampling deals with signals that evolve in time under the action of a linear operator. The purpose of the present paper is to analyze the performance of the basic dynamical sampling algorithms in the finite dimensional case and study the impact of additive noise. The algorithms are implemented and tested on synthetic and real data sets, and denoising techniques are integrated to mitigate the effect of the noise. We also develop theoretical and numerical results that validate the algorithm for recovering the driving operators, which are defined via a real symmetric convolution.

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TESS spots a mini-neptune interior to a hot saturn in the TOI-2000 system

arXiv

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arXiv 2022年

作者： Sha, Lizhou Vanderburg, Andrew M. Huang, Chelsea X. Armstrong, David J. Brahm, Rafael Giacalone, Steven Wood, Mackenna L. Collins, Karen A. Nielsen, Louise D. Hobson, Melissa J. Ziegler, Carl Howell, Steve B. Torres-Miranda, Pascal Mann, Andrew W. Zhou, George Delgado-Mena, Elisa Rojas, Felipe I. Abe, Lyu Trifonov, Trifon Adibekyan, Vardan Sousa, Sérgio G. Fajardo-Acosta, Sergio B. Guillot, Tristan Howard, Saburo Littlefield, Colin Hawthorn, Faith Schmider, François-Xavier Eberhardt, Jan Tan, Thiam-Guan Osborn, Ares Schwarz, Richard P. Strøm, Paul Jordán, Andrés Wang, Gavin Henning, Thomas Massey, Bob Law, Nicholas Stockdale, Chris Furlan, Elise Srdoc, Gregor Wheatley, Peter J. Navascués, David Barrado Lissauer, Jack J. Stassun, Keivan G. Ricker, George R. Vanderspek, Roland K. Latham, David W. Winn, Joshua N. Seager, Sara Jenkins, Jon M. Barclay, Thomas Bouma, Luke G. Christiansen, Jessie L. Guerrero, Natalia Rose, Mark E. Department of Astronomy University of Wisconsin-Madison 475 N Charter St MadisonWI53706 United States Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology 77 Massachusetts Ave CambridgeMA02139 United States Centre for Astrophysics University of Southern Queensland West Street ToowoombaQLD4350 Australia Department of Physics University of Warwick Gibbet Hill Road CoventryCV4 7AL United Kingdom Centre for Exoplanets and Habitability University of Warwick Gibbet Hill Road CoventryCV4 7AL United Kingdom Facultad de Ingeniería y Ciencias Universidad Adolfo Ibáñez Av. Diagonal las Torres 2640 Peñalolén Santiago Chile Millennium Institute for Astrophysics Chile Data Observatory Foundation Chile Department of Astronomy University of California at Berkeley BerkeleyCA94720 United States Department of Physics and Astronomy The University of North Carolina at Chapel Hill Chapel HillNC27599-3255 United States Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States European Southern Observatory Karl-Schwarzschild-Straße 2 Garching bei München85748 Germany Max-Planck-Institut für Astronomie Königstuhl 17 Heidelberg69117 Germany Millenium Institute for Astrophysics Chile Department of Physics Engineering and Astronomy Stephen F. Austin State University 1936 North St NacogdochesTX75962 United States NASA Ames Research Center Moffett FieldCA94035 United States Instituto de Astrofísica Pontificia Universidad Católica de Chile Avda. Vicuña Mackenna 4860 Macul Santiago Chile Instituto de Astrofisica e Ciencias do Espaco Universidade do Porto CAUP Rua das Estrelas PortoP-4150-762 Portugal Université Côte d'Azur Observatoire de la Côte d'Azur CNRS Laboratoire Lagrange Bd de l'Observatoire CS 34229 Nice06304 Cedex 4 France Department of Astronomy Sofia University "St Kliment Ohridski" 5 James Bourchier Blvd SofiaBG-1164 Bulgaria Caltech/IPAC Mail

Hot jupiters (P 60 M⊕) are almost always found alone around their stars, but four out of hundreds known have inner companion planets. These rare companions allow us to constrain the hot jupiter's formation history by ruling out high-eccentricity tidal migration. Less is known about inner companions to hot Saturn-mass planets. We report here the discovery of the TOI-2000 system, which features a hot Saturn-mass planet with a smaller inner companion. The mini-neptune TOI-2000 b (2.70±0.15 R⊕, 11.0±2.4 M⊕) is in a 3.10-day orbit, and the hot saturn TOI-2000 c (Equation presented) is in a 9.13-day orbit. Both planets transit their host star TOI-2000 (TIC 371188886, V = 10.98, TESS magnitude = 10.36), a metal-rich ((Equation presented)) G dwarf 174 pc away. TESS observed the two planets in sectors 9-11 and 36-38, and we followed up with ground-based photometry, spectroscopy, and speckle imaging. Radial velocities from CHIRON, FEROS, and HARPS allowed us to confirm both planets by direct mass measurement. In addition, we demonstrate constraining planetary and stellar parameters with MIST stellar evolutionary tracks through Hamiltonian Monte Carlo under the PyMC framework, achieving higher sampling efficiency and shorter run time compared to traditional Markov chain Monte Carlo. Having the brightest host star in the V band among similar systems, TOI-2000 b and c are superb candidates for atmospheric characterization by the JWST, which can potentially distinguish whether they formed together or TOI-2000 c swept along material during migration to form TOI-2000 b. Copyright © 2022, The Authors. All rights reserved.

关键词： Planets

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Global, regional, and national incidence of six major immune-mediated inflammatory diseases: findings from the global burden of disease study 2019

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eClinicalMedicine 2023年 64卷 102193-102193页

作者： Wu, Dongze Jin, Yingzhao Xing, Yuhan Abate, Melsew Dagne Abbasian, Mohammadreza Abbasi-Kangevari, Mohsen Abbasi-Kangevari, Zeinab Abd-Allah, Foad Abdelmasseh, Michael Abdollahifar, Mohammad-Amin Abdulah, Deldar Morad Abedi, Aidin Abedi, Vida Abidi, Hassan Aboagye, Richard Gyan Abolhassani, Hassan Abuabara, Katrina Abyadeh, Morteza Addo, Isaac Yeboah Adeniji, Kayode Nelson Adepoju, Abiola Victor Adesina, Miracle Ayomikun Adnani, Qorinah Estiningtyas Sakilah Afarideh, Mohsen Aghamiri, Shahin Agodi, Antonella Agrawal, Anurag Arriagada, Constanza Elizabeth Aguilera Ahmad, Aqeel Ahmad, Danish Ahmad, Sohail Ahmadi, Ali Ahmed, Ayman Aithala, Janardhana P. Ajadi, Abdullateef Abiodun Ajami, Marjan Akbarzadeh-Khiavi, Mostafa Alahdab, Fares AlBataineh, Mohammad T. Alemi, Sharifullah Al-Gheethi, Adel Ali Saeed Ali, Liaqat Alif, Sheikh Mohammad Almazan, Joseph Uy Almustanyir, Sami Alqahtani, Jaber S. Alqasmi, Ibrahim Altaf, Ihsan Ullah Khan Alvis-Guzman, Nelson Alvis-Zakzuk, Nelson J. Al-Worafi, Yaser Mohammed Aly, Hany Amani, Reza Amu, Hubert Amusa, Ganiyu Adeniyi Andrei, Catalina Liliana Ansar, Adnan Ansariniya, Hossein Anyasodor, Anayochukwu Edward Arabloo, Jalal Arefnezhad, Reza Arulappan, Judie Asghari-Jafarabadi, Mohammad Ashraf, Tahira Atata, Jamila Abdulhamid Athari, Seyyed Shamsadin Atlaw, Daniel Atout, Maha Moh'd Wahbi Aujayeb, Avinash Awan, Asma Tahir Ayatollahi, Haleh Azadnajafabad, Sina Azzam, Ahmed Y. Badawi, Alaa Badiye, Ashish D. Bagherieh, Sara Baig, Atif Amin Bantie, Berihun Bantie Barchitta, Martina Bardhan, Mainak Barker-Collo, Suzanne Lyn Barone-Adesi, Francesco Batra, Kavita Bayileyegn, Nebiyou Simegnew Behnoush, Amir Hossein Belgaumi, Uzma Iqbal Bemanalizadeh, Maryam Bensenor, Isabela M. Beyene, Kebede A. Bhagavathula, Akshaya Srikanth Bhardwaj, Pankaj Bhaskar, Sonu Bhat, Ajay Nagesh Bitaraf, Saeid Bitra, Veera R. Boloor, Archith Bora, Kaustubh Botelho, João Silva Buchbinder, Rachelle Calina, Daniela Cámera, Luis Alberto Carvalho, Andre F. Chan, Jeffrey Shi Kai Chattu, Vijay Kumar Abebe, Endeshaw Chekol Department of Rheumatology and Immunology Sichuan Provincial People's Hospital School of Medicine University of Electronic Science and Technology of China China Department of Medicine & Therapeutics The Chinese University of Hong Kong Hong Kong Department of Paediatrics The Chinese University of Hong Kong Hong Kong School of Pharmacy The Chinese University of Hong Kong Hong Kong Jockey Club School of Public Health and Primary Care The Chinese University of Hong Kong Hong Kong Department of Nursing Woldia University Woldia Ethiopia Department of Orthopedic Surgery Harvard University Boston MA United States Postgraduate Medical Education Harvard University Boston MA United States Maternal Fetal Care Center Harvard University Boston MA United States Department of Health Policy and Oral Epidemiology Harvard University Boston MA United States Division of General Internal Medicine Harvard University Boston MA United States Department of Orthopaedic Surgery Shahid Beheshti University of Medical Sciences Tehran Iran Social Determinants of Health Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Department of Biotechnology Shahid Beheshti University of Medical Sciences Tehran Iran Department of Epidemiology Shahid Beheshti University of Medical Sciences Tehran Iran National Nutrition and Food Technology Research Institute Shahid Beheshti University of Medical Sciences Tehran Iran Department of Immunology Shahid Beheshti University of Medical Sciences Tehran Iran Department of Neurology Shahid Beheshti University of Medical Sciences Tehran Iran Department of Medical Genetics Shahid Beheshti University of Medical Sciences Tehran Iran Center for Comprehensive Genetic Services Shahid Beheshti University of Medical Sciences Tehran Iran Cancer Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Department of Health Economics and Statistics Shahid Beheshti University of Medical Sciences Tehran Iran Functional Neuro

Background: The causes for immune-mediated inflammatory diseases (IMIDs) are diverse and the incidence trends of IMIDs from specific causes are rarely studied. The study aims to investigate the pattern and trend of IMIDs from 1990 to 2019. Methods: We collected detailed information on six major causes of IMIDs, including asthma, inflammatory bowel disease, multiple sclerosis, rheumatoid arthritis, psoriasis, and atopic dermatitis, between 1990 and 2019, derived from the Global Burden of Disease study in 2019. The average annual percent change (AAPC) in number of incidents and age standardized incidence rate (ASR) on IMIDs, by sex, age, region, and causes, were calculated to quantify the temporal trends. Findings: In 2019, rheumatoid arthritis, atopic dermatitis, asthma, multiple sclerosis, psoriasis, inflammatory bowel disease accounted 1.59%, 36.17%, 54.71%, 0.09%, 6.84%, 0.60% of overall new IMIDs cases, respectively. The ASR of IMIDs showed substantial regional and global variation with the highest in High SDI region, High-income North America, and United States of America. Throughout human lifespan, the age distribution of incident cases from six IMIDs was quite different. Globally, incident cases of IMIDs increased with an AAPC of 0.68 and the ASR decreased with an AAPC of −0.34 from 1990 to 2019. The incident cases increased across six IMIDs, the ASR of rheumatoid arthritis increased (0.21, 95% CI 0.18, 0.25), while the ASR of asthma (AAPC = −0.41), inflammatory bowel disease (AAPC = −0.72), multiple sclerosis (AAPC = −0.26), psoriasis (AAPC = −0.77), and atopic dermatitis (AAPC = −0.15) decreased. The ASR of overall and six individual IMID increased with SDI at regional and global level. Countries with higher ASR in 1990 experienced a more rapid decrease in ASR. Interpretation: The incidence patterns of IMIDs varied considerably across the world. Innovative prevention and integrative management strategy are urgently needed to mitigate the increasing ASR of rh

关键词： Global burden of disease study Immune-mediated inflammatory disease Incidence Trend

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