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Measurement of the production cross section of an isolated photon associated with jets in proton-proton collisions at s=7 TeV with the ATLAS detector

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Physical Review D 2012年第9期85卷 092014-092014页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins O. S. AbouZeid H. Abramowicz H. Abreu E. Acerbi B. S. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman M. Aderholz S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov A. Akiyama M. S. Alam M. A. Alam J. Albert S. Albrand M. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev B. M. M. Allbrooke P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso B. Alvarez Gonzalez M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. S. Anduaga A. Angerami F. Anghinolfi A. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli S. Aoun L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce S. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai R. Asfandiyarov S. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov B. Aubert E. Auge K. Augsten M. Aurousseau G. Avolio R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas M. Backes M. Backhaus E. Badescu P. Bagnaia S. Bahinipati Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker M. D. Baker S. Baker E. Banas P. Banerjee Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov A. Barashkou A. Barbaro Galtieri T. Barber E. L. Barberio D. Barberis M. Barbero D. Y. Bardin T. Barillari M. Barisonzi T. Barklow N. Barlow B. M. Barnett R. M. Barnett A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton V. Bartsch R. L. Bates L. Batkova J. R. Batl Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i. Br. Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman OK United States of America Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona and ICREA Barcelona Spain Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater OK United States of America Department of Physics and Astronomy Michigan State University East Lansing MI United States of America Department of Physics University of Toronto Toronto ON Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel LAL Univ. Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton NY United States of America Department of Physics Hampton University Hampton VA United States of America Department of Physics Yale University New Haven CT United States of America Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany School of Physics and Astronomy Queen Mary University of London London United Kingdom Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Brandeis University Waltham MA United States of America Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University

A measurement of the cross section for the production of an isolated photon in association with jets in proton-proton collisions at a center-of-mass energy s=7 TeV is presented. Photons are reconstructed in the pseudorapidity range |ηγ|<1.37 and with a transverse energy ETγ>25 GeV. Jets are reconstructed in the rapidity range |yjet|<4.4 and with a transverse momentum pTjet>20 GeV. The differential cross section dσ/dETγ is measured, as a function of the photon transverse energy, for three different rapidity ranges of the leading-pT jet: |yjet|<1.2, 1.2≤|yjet|<2.8 and 2.8≤|yjet|<4.4. For each rapidity configuration the same-sign (ηγyjet≥0) and opposite-sign (ηγyjet<0) cases are studied separately. The results are based on an integrated luminosity of 37 pb−1, collected with the ATLAS detector at the LHC. Next-to-leading order perturbative QCD calculations are found to be in fair agreement with the data, except for ETγ≲45 GeV, where the theoretical predictions overestimate the measured cross sections.

关键词： CROSS sections (Nuclear physics) PHOTONS JETS (Nuclear physics) PROTON-proton interactions DETECTORS CENTER of mass MOMENTUM (Mechanics)

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Sizing and fuel consumption evaluation methodology for hybrid light duty vehicles

Sizing and fuel consumption evaluation methodology for hybri...

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25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition: Sustainable Mobility Revolution, EVS 2010

作者： Marc, Nicolas Prada, Eric Sciarretta, Antonio Anwer, Shadab Vangraefschepe, Franck Badin, François Charlet, Alain Higelin, Pascal Energy Application Technique Division IFP Energies nouvelles Rond-point de l'échangeur de Solaize BP 3 69360 Solaize France Applied Chemistry and Physical Chemistry Division IFP Energies nouvelles Rond-point de l'échangeur de Solaize BP 3 69360 Solaize France Technology Computer Science and Applied Mathematics Division IFP Energies nouvelles 1 et 4 avenue de Bois-Préau 92852 Rueil-Malmaison France IFP Energies nouvelles IFP School 1 et 4 Avenue de Bois-Préau 92852 Rueil- Malmaison France Energy Application Technique Division IFP Energies nouvelles 1 et 4 Avenue de Bois-Préau 92852 Rueil- Malmaison France PRISME/EPM Université D'Orléans 8 rue Léonard de Vinci 45072 Orléans Cedex 2 France

This paper presents a methodology dedicated to component sizing and fuel consumption evaluation of different degree of hybridization for light duty vehicles applications. The methodology will be described together with vehicle and components simulation and sizing principles. To ensure a systematic approach, with no bias for any of the cases considered, the energy management of the hybrid drivetrain will be carried out thanks to an optimization based on the Pontryagin's Minimum Principle. As hybrid fuel consumption is highly dependant on vehicle type of use, the hybrid vehicles will be evaluated on different actual use driving patterns as well as on missions representing the daily usage of the vehicle. The methodology and a panel of results are presented in the paper.

关键词： Energy utilization

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An inventory of potentially habitable environments on Mars: Geological and biological perspectives

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Special Paper of the Geological Society of America 2011年 483卷 317-347页

作者： Dohm, J.M. Miyamoto, H. Ori, G.G. Fairén, A.G. Davila, A.F. Komatsu, G. Mahaney, W.C. Williams, J.-P. Joye, S.B. Di Achille, G. Oehler, D.Z. Marzo, G.A. Schulze-Makuch, D. Acocella, V. Glamoclija, M. Pondrelli, M. Boston, P. Hart, K.M. Anderson, R.C. Baker, V.R. Fink, W. Kelleher, B.P. Furfaro, R. Gross, C. Hare, T.M. Frazer, A.R. Ip, F. Allen, C.C.R. Kim, K.J. Maruyama, S. McGuire, P.C. Netoff, D. Parnell, J. Wendt, L. Wheelock, S.J. Steele, A. Hancock, R.G.V. Havics, R.A. Costa, P. Krinsley, D. Department of Hydrology and Water Resources University of Arizona Tucson AZ United States University Museum Tokyo Japan International Research School of Planetary Sciences Università d'Annunzio Pescara Italy Space Sciences and Astrobiology Division National Aeronautics and Space Administration Ames Research Center Moffett Field CA United States SETI Institute Mountain View CA United States Planetary Exploration Research Center Chiba Institute of Technology Chiba Japan Quaternary Surveys Toronto ON Canada Division of Geological and Planetary Sciences California Institute of Technology Pasadena CA United States Ashima Research Pasadena CA United States Department of Marine Sciences University of Georgia Athens GA United States Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO United States Astromaterials Research and Exploration Science NASA Johnson Space Center Houston TX United States Bay Area Environmental Research Institute Sonoma CA United States School of Earth and Environmental Sciences Washington State University Pullman WA United States Dipartimento Science Geologiche Università Roma Tre Rome Italy Geophysical Laboratory Carnegie Institution of Washington Carnegie WA United States Department of Earth and Environmental Science New Mexico Tech Socorro NM United States School of Chemical Sciences Dublin City University Dublin Ireland Jet Propulsion Laboratory California Institute of Technology Pasadena CA United States Division of Physics Mathematics and Astronomy California Institute of Technology Pasadena CA United States Departments of Electrical and Computer Engineering and Biomedical Engineering University of Arizona Tucson AZ United States Department of Aerospace and Mechanical Engineering University of Arizona Tucson AZ United States Institute of Geological Sciences-Planetary Sciences and Remote Sensing Freie Universität Berlin Malteserstrasse Berlin Germany U.S. Geological Survey Flagstaff

ISBN: (纸本)9780813724836

On Earth, biology, hydrology, and geology are interlinked such that certain types of life are often associated with specifi c conditions, including rock type, pressure, temperature, and chemistry. Life on Earth has established itself in diverse and extreme niches, presenting the possibility that Mars, too, may hold records of fossilized and/or extant life in diverse environments. Geologic, paleohydrologic, and climatic conditions through the evolution of Mars are similar in many respects to conditions occurring during the evolution of Earth and, as such, may point to environments on Mars with potential to have supported living systems. Here, we discuss examples of those Martian settings. Such extraterrestrial environments should be targeted by international robotic and/or manned missions to explore potential fossilized or extant life on Mars. © 2011 Geological Society of America.

关键词： Geology

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Stylistic analysis of paintings using wavelets and machine learning

Stylistic analysis of paintings using wavelets and machine l...

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17th European Signal Processing Conference, EUSIPCO 2009

作者： Jafarpour, Sina Polatkan, Güngör Brevdo, Eugene Hughes, Shannon Brasoveanu, Andrei Daubechies, Ingrid Princeton University Departments of Electrical Engineering Computer Science and Mathematics Program in Applied and Computational Mathematics Princeton NJ 08544 United States

Wavelet transforms and machine learning tools can be used to assist art experts in the stylistic analysis of paintings. A dual-tree complex wavelet transform, Hidden Markov Tree modeling and Random Forest classifiers are used here for a stylistic analysis of Vincent van Gogh's paintings with results on two stylometry challenges that concern "dating, resp. extracting distinguishing features". © EURASIP, 2009.

关键词： Decision trees

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Search for contact interactions in dimuon events from pp collisions at s=7 TeV with the ATLAS detector

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Physical Review D 2011年第1期84卷 011101(R)-011101(R)页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. S. Acharya D. L. Adams T. N. Addy J. Adelman M. Aderholz S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov A. Akiyama M. S. Alam M. A. Alam S. Albrand M. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos T. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. S. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli S. Antonelli A. Antonov J. Antos F. Anulli S. Aoun L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J. P. Archambault S. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai R. Asfandiyarov S. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes M. Backhaus E. Badescu P. Bagnaia S. Bahinipati Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker M. D. Baker S. Baker F. Baltasar Dos Santos Pedrosa E. Banas P. Banerjee Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov A. Barashkou A. Barbaro Galtieri T. Barber E. L. Barberio D. Barberis M. Barbero D. Y. Bardin T. Barillari M. Barisonzi T. Barklow N. Barlow B. M. Barnett R. M. Barnett A. Baroncelli A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch V. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Battist Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i.Br. Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Universitat Autònoma de Barcelona and ICREA Barcelona Spain Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel LAL Université Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Udine Italy ICTP Trieste Italy Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Queen Mary University of London London United Kingdom Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Brandeis University Waltham Massachusetts USA Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Portugal Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University Boston Massachusetts USA Department of Physics and Astronomy Stony Brook University Stony Brook New York USA Physics Department University of Texas at Dallas Richardson Texas USA INFN Sezione di Roma Tor Vergata Roma Italy Dipartimento di Fisica Università di Roma Tor

A search for contact interactions has been performed using dimuon events recorded with the ATLAS detector in proton-proton collisions at s=7 TeV. The data sample corresponds to an integrated luminosity of 42 pb−1. No significant deviation from the standard model is observed in the dimuon mass spectrum, allowing the following 95% C.L. limits to be set on the energy scale of contact interactions: Λ>4.9 TeV (4.5 TeV) for constructive (destructive) interference in the left-left isoscalar compositeness model. These limits are the most stringent to date for μμqq contact interactions.

关键词： PROTON-proton interactions MUONS W bosons MASS (Physics) LAGRANGE equations -- Numerical solutions

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Generating thermal conditions to regenerate a DPF: Impact of the reductant on the performances of diesel oxidation catalysts

Generating thermal conditions to regenerate a DPF: Impact of...

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作者： Frobert, Arnaud Creff, Yann Lepreux, Olivier Schmidt, Laurent Raux, Stéphane IFP-Lyon Energy Applications Techniques Division 69360 Solaize France IFP-Lyon Technology Computer Science and Applied Mathematics Division 69360 Solaize France

The influence of the type of fuel and the feeding means to a DOC, in order to regenerate a DPF, was investigated. Diesel fuel in cylinder late post-injection was compared to the injection in the exhaust line, through an exhaust port injector, of diesel fuel, B10 (diesel fuel containing 10% of esters) and gasoline. Diesel fuel exhaust injection resulted in a deteriorated conversion efficiency, while the incorporation of esters to the diesel fuel was demonstrated to have no influence. Gasoline exhaust injection led to less HC slip than diesel fuels. Temperature dynamics resulting from injection steps showed taught that the shorter the hydrocarbons (within the tested fuels), the slower the response. These differences can be caught by simple models, leading to interesting opportunities for the model-based control of the DPF inlet temperature during active regenerations. Copyright © 2009 SAE International.

关键词： Diesel fuels

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Erratum to: Genome sequence of an Australian kangaroo, Macropus eugenii, provides insight into the evolution of mammalian reproduction and development

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Genome Biology 2011年第12期12卷 1-2页

作者： Marilyn B Renfree Anthony T Papenfuss Janine E Deakin Katherine Belov Paul D Waters Geoff Shaw Emily SW Wong Matthew J Wakefield Kyall R Zenger Chenwei Wang Danielle Hickford Hongshi Yu Hannah V Siddle Stephen R Frankenberg Keng Y Chew Brandon R Menzies Jessica M Stringer Shunsuke Suzuki Timothy A Hore Margaret L Delbridge Hardip Patel Amir Mohammadi Nanette Y Schneider Yanqiu Hu Shafagh Al Nadaf Elizabeth Kuczek Desmond W Cooper Terence P Speed Jennifer A M Graves Andrew J Pask Susan M Forrest Elizabeth A Pharo Zhi-Ping Feng Arthur Hsu Kaighin A McColl Benjamin Lansdell James Lindsay Thomas Heider William O'Hara Dawn M Carone Rachel J O'Neill Frank W Nicholas Chen Wu Willem Rens Malcolm Ferguson-Smith Christophe M Lefèvre Kevin R Nicholas Yoko Kuroki Yoshiyuki Sakaki Shinji Kondo Yuichiro Nishida Shoji Tatsumoto Kirsty R Short Benjamin G Cocks Jianghui Wang Paul Flicek Kathryn Beal Javier Herrero Stephen MJ Searle Susan Fairley Yutaka Suzuki Sumio Sugano Atsushi Toyoda Asao Fujiyama Ion Mandiou George Weinstock Donna M Muzny Shalini N Jhangiani Lora R Lewis Margaret B Morgan Geoffrey O Okwuonu San J Ruiz Jireh Santibanez Lynne Nazareth Andrew Cree Gerald Fowler Christie L Kovar Huyen H Dinh Vandita Joshi Chyn Jing Fremiet Lara Rebecca Thornton Lei Chen Jixin Deng Yue Liu Joshua Y Shen Xing-Zhi Song Richard A Gibbs Kim C Worley Annette McGrath Peter Wilson Artem Men Mehlika Hazar-Rethinam Allison Hall John Davis David Wood Sarah Williams Yogi Sundaravadanam Janette Edson Carmen Troon Daniel Thomas Amber Stephens Lankesha Yapa Tanya Levchenko The Australian Research Council Centre of Excellence in Kangaroo Genomics Australia Department of Zoology The University of Melbourne Melbourne Victoria 3010 Australia Bioinformatics Division The Walter and Eliza Hall Institute of Medical Research Parkville Victoria 3052 Australia Department of Mathematics and Statistics The University of Melbourne Melbourne Victoria 3010 Australia Research School of Biology The Australian National University Canberra ACT 0200 Australia Faculty of Veterinary Science University of Sydney Sydney NSW 2006 Australia School of Marine and Tropical Biology James Cook University Townsville Queensland 4811 Australia Leibniz Institute for Zoo and Wildlife Research Alfred-Kowalke-Str. 17 Berlin 10315 Germany Laboratory of Developmental Genetics and Imprinting The Babraham Institute Cambridge CB22 3AT UK Department of Molecular Genetics German Institute of Human Nutrition Potsdam-Rehbruecke Arthur-Scheunert-Allee 114-116 14558 Nuthetal Germany Australian Genome Research Facility Melbourne Victoria 3052 and the University of Queensland St Lucia Queensland 4072 Australia Westmead Institute for Cancer Research University of Sydney Westmead New South Wales 2145 Australia Department of Biological Earth and Environmental Sciences The University of New South Wales Sydney NSW 2052 Australia Department of Molecular and Cell Biology Center for Applied Genetics and Technology University of Connecticut Storrs CT 06269 USA Department of Medical Biology The University of Melbourne Melbourne Victoria 3010 Australia Department of Cell Biology University of Massachusetts Medical School Worcester MA 01655 USA Department of Veterinary Medicine University of Cambridge Madingley Rd Cambridge CB3 0ES UK Institute for Technology Research and Innovation Deakin University Geelong Victoria 3214 Australia RIKEN Institute 1-7-22 Suehiro-cho Tsurumi-ku Yokohama Kanagawa 230-0045 Japan Department of Microbiology and Immunology

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Early diagnosis of dementia based on intersubject whole-brain dissimilarities

Early diagnosis of dementia based on intersubject whole-brai...

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IEEE International Symposium on Biomedical Imaging

作者： S. Klein M. Loog F. van der Lijn T. den Heijer A. Hammers M. de Bruijne A. van der Lugt R.P.W. Duin M.M.B. Breteler W.J. Niessen Biomedical Imaging Group Rotterdam Departments of Radiology & Medical Informatics Erasmus MC-University Medical Center Rotterdam Rotterdam Netherlands Pattern Recognition Laboratory Faculty of Electrical Engineering Mathematics Computer Science Delft University of Technnology Netherlands Department of Neurology Erasmus MC-University Medical Center Rotterdam Rotterdam Netherlands Neurodis Foundation CERMEP PET Centre Lyon France MRC Clinical Sciences Centre and Division of Neuroscience and Mental Health Imperial College Hammersmith Hospital London UK Department of Computer Science University of Copenhagen Copenhagen Denmark Department of Radiology Erasmus MC-University Medical Center Rotterdam Rotterdam Netherlands Department of Epidemiology & Biostatistics Erasmus MC-University Medical Center Rotterdam Rotterdam Netherlands Imaging Science & Technology Department of Applied Sciences Delft University of Technnology Netherlands

ISBN: (纸本)9781424441259

This article studies the possibility of detecting dementia in an early stage, using nonrigid registration of MR brain scans in combination with dissimilarity-based pattern recognition techniques. Instead of focussing on the shape of a single brain structure, we take into account the shape differences within the entire brain. Imaging data was obtained from a longitudinal, population based study of the elderly. A set of 29 subjects was identified, who were asymptomatic at the time of scanning, but were diagnosed as having dementia within 0.7 to 5 years after the scan, and a set of 29 age and gender matched healthy controls were selected. Each subject was registered to all other subjects, using a nonrigid registration algorithm. Based on statistics of the deformation field in the brain, a dissimilarity measure was calculated between each pair of subjects, yielding a 58×58 dissimilarity matrix. A kNN classifier was trained on the dissimilarity matrix and the performance was tested in a leave-one-out experiment. A classification accuracy of 81% was attained (spec. 83%, sens. 79%). This demonstrates the potential of whole-brain intersubject dissimilarities to aid in early diagnosis of dementia.

关键词： Dementia Brain Pattern recognition Shape Radiology computer science Biomedical imaging Senior citizens Diseases Biomarkers

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A Nearly-Linear Time Algorithm for Approximately Solving Linear Systems in a Symmetric M-Matrix

A Nearly-Linear Time Algorithm for Approximately Solving Lin...

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Combinatorial Scientific Computing 2009

作者： Daitch, Samuel I. Spielman, Daniel A. Yale University Department of Computer Science PO Box 208285 New HavenCT06520-8285 United States Yale University Program in Applied Mathematics and Department of Computer Science PO Box 208285 New HavenCT06520-8285 United States

We present an algorithm for solving a linear system in a symmetric M-matrix. In particular, for n × n symmetric M-matrix M, we show how to find a diagonal matrix D such that DMD is diagonally-dominant. To compute D, the algorithm must solve O (log n) linear systems in diagonally-dominant matrices. If we solve these diagonally-dominant systems approximately using the Spielman-Teng nearly-linear time solver [1], then we obtain an algorithm for approximately solving linear systems in symmetric M-matrices, for which the expected running time is also nearly-linear. © 2009 Combinatorial Scientific Computing. All Rights Reserved.

关键词： Linear systems

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STYLISTIC ANALYSIS OF PAINTINGS USING WAVELETS AND MACHINE LEARNING

STYLISTIC ANALYSIS OF PAINTINGS USING WAVELETS AND MACHINE L...

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European signal processing conference

作者： Sina Jafarpour Guengor Polatkan Eugene Brevdo Shannon Hughes Andrei Brasoveanu Ingrid Daubechies Departments of Electrical Engineering Computer Science and Mathematics and the Program in Applied and Computational Mathematics Princeton NJ 08544

ISBN: (纸本)9781617388767

关键词： Support vector machines Abstracts Image resolution Radio frequency

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