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search for contact interactions and large extra dimensions in dilepton events from pp collisions at s=7 Tev with the ATLAs detector

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Physical Review D 2013年第1期87卷 015010-015010页

作者： G. Aad T. Abajyan b. Abbott J. Abdallah s. Abdel Khalek A. A. Abdelalim O. Abdinov R. Aben b. Abi M. Abolins O. s. AbouZeid H. Abramowicz H. Abreu b. s. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman s. Adomeit P. Adragna T. Adye s. Aefsky J. A. Aguilar-saavedra M. Agustoni M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. P. A. Åkesson G. Akimoto A. v. Akimov 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 b. M. M. Allbrooke P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako C. Amelung v. v. Ammosov s. P. Amor Dos santos A. Amorim 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 s. Angelidakis P. Anger A. Angerami F. Anghinolfi A. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki s. Aoun L. Aperio bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce s. Arfaoui J-F. Arguin s. Argyropoulos E. Arik M. Arik A. J. Armbruster O. Arnaez v. Arnal C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai s. Ask b. Åsman L. Asquith K. Assamagan A. Astbury M. Atkinson b. Aubert E. Auge K. Augsten M. Aurousseau G. Avolio R. Avramidou D. Axen G. Azuelos Y. Azuma M. A. baak G. baccaglioni C. bacci A. M. bach H. bachacou K. bachas M. backes M. backhaus J. backus Mayes E. badescu P. bagnaia s. bahinipati Y. bai D. C. bailey T. bain J. T. baines O. K. baker M. D. baker s. baker P. balek E. banas P. banerjee sw. banerjee D. banfi A. bangert v. bansal H. s. bansil L. barak s. P. baranov 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 Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona and ICREA Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Section de Physique Université de Genève Geneva Switzerland Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat a l’Energie Atomique) Gif-sur-Yvette France 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 New York USA Department of Physics Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA 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 Massachusetts USA Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Swi

A search for nonresonant new phenomena, originating from either contact interactions or large extra spatial dimensions, has been carried out using events with two isolated electrons or muons. These events, produced at the LHC in proton-proton collisions at s=7 Tev, were recorded by the ATLAs detector. The data sample, collected throughout 2011, corresponds to an integrated luminosity of 4.9 and 5.0 fb−1 in the e+e− and μ+μ− channels, respectively. No significant deviations from the standard Model expectation are observed. Using a bayesian approach, 95% confidence level lower limits ranging from 9.0 to 13.9 Tev are placed on the energy scale of ℓℓqq contact interactions in the left-left isoscalar model. Lower limits ranging from 2.4 to 3.9 Tev are also set on the string scale in large extra dimension models. After combining these limits with results from a similar search in the diphoton channel, slightly more stringent limits are obtained.

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Measurement of upsilon production in 7 Tev pp collisions at ATLAs

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Physical Review D 2013年第5期87卷 052004-052004页

作者： G. Aad T. Abajyan b. Abbott J. Abdallah s. Abdel Khalek A. A. Abdelalim O. Abdinov R. Aben b. Abi M. Abolins O. s. AbouZeid H. Abramowicz H. Abreu b. s. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman s. Adomeit P. Adragna T. Adye s. Aefsky J. A. Aguilar-saavedra M. Agustoni M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. P. A. Åkesson G. Akimoto A. v. Akimov 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 b. M. M. Allbrooke P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako C. Amelung v. v. Ammosov s. P. Amor Dos santos A. Amorim 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 s. Angelidakis P. Anger A. Angerami F. Anghinolfi A. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki s. Aoun L. Aperio bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce s. Arfaoui J-F. Arguin s. Argyropoulos E. Arik M. Arik A. J. Armbruster O. Arnaez v. Arnal A. Artamonov G. Artoni D. Arutinov s. Asai s. Ask b. Åsman L. Asquith K. Assamagan A. Astbury M. Atkinson b. Aubert E. Auge K. Augsten M. Aurousseau G. Avolio D. Axen G. Azuelos Y. Azuma M. A. baak G. baccaglioni C. bacci A. M. bach H. bachacou K. bachas M. backes M. backhaus J. backus Mayes E. badescu P. bagnaia s. bahinipati Y. bai D. C. bailey T. bain J. T. baines O. K. baker M. D. baker s. baker P. balek E. banas P. banerjee sw. banerjee D. banfi A. bangert v. bansal H. s. bansil L. barak s. P. baranov 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 R. bartoldus A. E. barton v. bartsch A. basye R. L. bates L. b Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona and ICREA Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Section de Physique Université de Genève Geneva Switzerland Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat a l’Energie Atomique) Gif-sur-Yvette France 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 New York USA Department of Physics Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA 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 Massachusetts USA Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Swi

Using 1.8 fb−1 of pp collisions at a center-of-mass energy of 7 Tev recorded by the ATLAs detector at the Large Hadron Collider, we present measurements of the production cross sections of Υ(1s,2s,3s) mesons. Υ mesons are reconstructed using the dimuon decay mode. Total production cross sections for pT<70 Gev and in the rapidity interval |yΥ|<2.25 are measured to be, 8.01±0.02±0.36±0.31 nb, 2.05±0.01±0.12±0.08 nb, and 0.92±0.01±0.07±0.04 nb, respectively, with uncertainties separated into statistical, systematic, and luminosity measurement effects. In addition, differential cross section times dimuon branching fractions for Υ(1s), Υ(2s), and Υ(3s) as a function of Υ transverse momentum pT and rapidity are presented. These cross sections are obtained assuming unpolarized production. If the production polarization is fully transverse or longitudinal with no azimuthal dependence in the helicity frame, the cross section may vary by approximately ±20%. If a nontrivial azimuthal dependence is considered, integrated cross sections may be significantly enhanced by a factor of 2 or more. We compare our results to several theoretical models of Υ meson production, finding that none provide an accurate description of our data over the full range of Υ transverse momenta accessible with this data set.

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search for new phenomena in events with three charged leptons at s=7 Tev with the ATLAs detector

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Physical Review D 2013年第5期87卷 052002-052002页

作者： G. Aad T. Abajyan b. Abbott J. Abdallah s. Abdel Khalek A. A. Abdelalim O. Abdinov R. Aben b. Abi M. Abolins O. s. AbouZeid H. Abramowicz H. Abreu b. s. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman s. Adomeit P. Adragna T. Adye s. Aefsky J. A. Aguilar-saavedra M. Agustoni M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. P. A. Åkesson G. Akimoto A. v. Akimov 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 b. M. M. Allbrooke P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako C. Amelung v. v. Ammosov s. P. Amor Dos santos A. Amorim 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 s. Angelidakis P. Anger A. Angerami F. Anghinolfi A. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki s. Aoun L. Aperio bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce s. Arfaoui J.-F. Arguin s. Argyropoulos E. Arik M. Arik A. J. Armbruster O. Arnaez v. Arnal A. Artamonov G. Artoni D. Arutinov s. Asai s. Ask b. Åsman L. Asquith K. Assamagan A. Astbury M. Atkinson b. Aubert E. Auge K. Augsten M. Aurousseau G. Avolio D. Axen G. Azuelos Y. Azuma M. A. baak G. baccaglioni C. bacci A. M. bach H. bachacou K. bachas M. backes M. backhaus J. backus Mayes E. badescu P. bagnaia s. bahinipati Y. bai D. C. bailey T. bain J. T. baines O. K. baker M. D. baker s. baker P. balek E. banas P. banerjee sw. banerjee D. banfi A. bangert v. bansal H. s. bansil L. barak s. P. baranov 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 R. bartoldus A. E. barton v. bartsch A. basye R. L. bates L. Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona and ICREA Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Section de Physique Université de Genève Geneva Switzerland Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat à l’Energie Atomique et aux Energies Alternatives) Gif-sur-Yvette France INFN Gruppo Collegato di Udine 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 New York USA Department of Physics Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA 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 Massachusetts USA Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Ph

A generic search for anomalous production of events with at least three charged leptons is presented. The search uses a pp-collision data sample at a center-of-mass energy of s=7 Tev corresponding to 4.6 fb−1 of integrated luminosity collected in 2011 by the ATLAs detector at the CERN Large Hadron Collider. Events are required to contain at least two electrons or muons, while the third lepton may either be an additional electron or muon, or a hadronically decaying tau lepton. Events are categorized by the presence or absence of a reconstructed tau-lepton or Z-boson candidate decaying to leptons. No significant excess above backgrounds expected from standard Model processes is observed. Results are presented as upper limits on event yields from non-standard-Model processes producing at least three prompt, isolated leptons, given as functions of lower bounds on several kinematic variables. Fiducial efficiencies for model testing are also provided. The use of the results is illustrated by setting upper limits on the production of doubly charged Higgs bosons decaying to same-sign lepton pairs.

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Measurement of W+W− production in pp collisions at s=7 Tev with the ATLAs detector and limits on anomalous WWZ and WWγ couplings

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Physical Review D 2013年第11期87卷 112001-112001页

作者： G. Aad T. Abajyan b. Abbott J. Abdallah s. Abdel Khalek A. A. Abdelalim O. Abdinov R. Aben b. Abi M. Abolins O. s. AbouZeid H. Abramowicz H. Abreu b. s. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman s. Adomeit P. Adragna T. Adye s. Aefsky J. A. Aguilar-saavedra M. Agustoni M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. v. Akimov 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 b. M. M. Allbrooke P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako C. Amelung v. v. Ammosov s. P. Amor Dos santos A. Amorim 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 s. Angelidakis P. Anger A. Angerami F. Anghinolfi A. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki 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 v. Arnal C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai s. Ask b. Åsman L. Asquith K. Assamagan A. Astbury M. Atkinson b. Aubert E. Auge K. Augsten M. Aurousseau G. Avolio R. Avramidou D. Axen G. Azuelos Y. Azuma M. A. baak G. baccaglioni C. bacci A. M. bach H. bachacou K. bachas M. backes M. backhaus J. backus Mayes E. badescu P. bagnaia s. bahinipati Y. bai D. C. bailey T. bain J. T. baines O. K. baker M. D. baker s. baker P. balek E. banas P. banerjee sw. banerjee D. banfi A. bangert v. bansal H. s. bansil L. barak s. P. baranov 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. b Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona and ICREA Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Section de Physique Université de Genève Geneva Switzerland Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat a l’Energie Atomique) Gif-sur-Yvette France 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 New York USA Department of Physics Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA 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 Massachusetts USA Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Swi

This paper presents a measurement of the W+W− production cross section in pp collisions at s=7 Tev. The leptonic decay channels are analyzed using data corresponding to an integrated luminosity of 4.6 fb−1 collected with the ATLAs detector at the Large Hadron Collider. The W+W− production cross section σ(pp→W+W−+X) is measured to be 51.9±2.0(stat)±3.9(syst)±2.0(lumi) pb, compatible with the standard Model prediction of 44.7−1.9+2.1 pb. A measurement of the normalized fiducial cross section as a function of the leading lepton transverse momentum is also presented. The reconstructed transverse momentum distribution of the leading lepton is used to extract limits on anomalous WWZ and WWγ couplings.

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Automatic marking of Punjabi syllables boundaries in a sound File

Automatic marking of Punjabi Syllables Boundaries in a Sound...

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2010 2nd International Conference on signal Processing system(2010年信号处理系统国际会议 ICsPs 2010)

作者： Amanpreet Kaur Parminder singh Dhavleesh Rattan Department of Computer science and Engineering RIMT-IET Mandi Gobindgarh Department of Computer science and Engineering Guru Nanak Dev Engineering College Ludhiana Department of Computer Science and Engineering B.B.S.B.E.C Fatehgarh Sahib (Punjab)-INDIA

Automatic speech segmentation is one of the foremost important field for controlling the simulation of speech without intervening of human being. segmenting the continuous speech signal according to the phonetic transcription is a fundamental task in any voice activated system. Manual segmentation is tedious, time consuming and error prone. Automatic segmentation is not faultless, but it is inherently consistent and results are reproducible. In spite of the endless efforts made in this field, there is no speech segmentation system in the market for Punjabi on large vocabulary, though speaker independent systems are available for the languages like English, Tamil. It is a well known fact syllable based systems perform better than phoneme or word based *** our work, we are presenting an effective method for segmentation of Punjabi speech into syllable like basic units for AsR systems.

关键词： segmentation syllables short term energy

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FsK-signal detection in cognitive radios using first-order cyclostationarity

FSK-signal detection in cognitive radios using first-order c...

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2010 17th International Conference on Telecommunications, ICT 2010

作者： Zhou, Yi Qaraqe, Khalid serpedin, Erchin Dobre, Octavia Department of Electrical and Computer Engineering Texas A and M University College Station TX 77843-3128 United States Faculty of Engineering and Applied Science Memorial University of Newfoundland St. John's NL A1B 3X5 Canada

ISBN: (纸本)9781424452477

Cognitive radio is regarded as a novel approach for improving the utilization of precious radio spectrum resources. The detection of low signal-to-noise ratio (sNR) signals with relaxed a priori information on the signal parameters is of high importance for cognitive radios. This paper proposes a detection algorithm based on the first-order cyclostationarity for frequency shift keying (FsK) signals that only requires rough information on the signal bandwidth, carrier frequency and symbol rate. A theoretical asymptotic analysis is performed. simulation results show that the proposed algorithm performs well at low sNRs. © 2009 IEEE.

关键词： Cognitive radio

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Web based decision support system for management of defence activities: Process Automation in strategic Command - Decision support system (PAsC-Dss)

Web based decision support system for management of defence ...

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IEEE International Conference on Communication Control and Computing Technologies (ICCCCT)

作者： suman Patil Lalita Madanbhavi Electronics and Communication Department B. V. Bhoomaraddi College of Engineering and Technology Hubli Karnataka India Computer Science Department B. V. Bhoomaraddi College of Engineering and Technology Hubli Karnataka India

"Process Automation in strategic Command Decision support system" (PAsC Dss) is a program being executed by Center for Artificial Intelligence and Robotics (CAIR) to provide Indian Defence with a system built on leading edge technology. PAsC Dss helps in collecting, collating, filtering, processing, synthesizing and displaying the information gathered from various sources and provide support while decision making. The system also helps to provide support for gathering information for various resources of Indian Defence and utilizing this information at the time of executing various operations.

关键词： Decision support systems Automation Humans Decision making spread spectrum communication Computational modeling

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Notice of Retraction: Performance evaluation of sigmoid functions with hybrid computational method for Optimizing Lemon Grass Oil Production

Notice of Retraction: Performance evaluation of sigmoid func...

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International Conference on computer science and Information Technology (CsIT)

作者： brajesh Kumar singh Akash Punhani shafiqulabidin Ritu Nigam Department of Computer Science & Engineering F.E.T. R.B.S College Agra India Department of Information Technology Ministry of Manpower Al Musanna College of Technology Sultanate of Oman Oman Department of Computer Science & Engineering BMAS Engineering College Agra India

This article has been retracted by the publisher.

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Performance Evaluation of sigmoid Functions with Hybrid Computational Method for Optimizing Lemon Grass Oil Production

Performance Evaluation of Sigmoid Functions with Hybrid Comp...

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2010 3rd IEEE International Conference on computer science and Information Technology—ICCsIT 2010

作者： brajesh Kumar singh Akash Punhani shafiqulabidin Ritu Nigam Department of Computer Science & Engineering F.E.T. R.B.S.CollegeBichpuri AgraIndia Department of Information Technology Al Musanna College of Technology(Ministry of Manpower) Sultanate of Oman Department of Computer Science & Engineering BMAS Engineering College Agra India

Two different Approaches are used to Optimize Lemon Grass Oil *** Production is compared and Production-Nutrient ratio comparison also shows that Logistic function is giving best result for production-nutrient *** log... 详细信息

关键词： back propagation neural network,fertilizers,Genetic algorithm,oil production.

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Prominent boundaries detection technique for color images

Prominent boundaries detection technique for color images

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International Conference on Computing and Networking Technology (ICCNT)

作者： Darshak G. Thakore A. I. Trivedi Computer Engineering Section Electrical Engineering Department B V M Engineering College Vallabh Vidyanagar Gujarat India Electrical Engineering Department Faculty of Technology & Engineering M. S. University슠of Baroda Vadodara India

The proposed novel method categorizes candidate boundaries into visually-prominent and non-prominent boundaries, considering local intensity cues of multiple color channels and pixel-prominence-values measured as a function of proximity-influence of other contours. The results of the method with and without incorporating a wavelet transform are compared for images of different characteristics, types and resolutions. The method has been exhaustively tested on textured, medical, natural, biometric and synthesized images for prominent boundaries detection. The method results are qualitatively compared with those of human segmented images of benchmark image-segmentation dataset. The results presented show suitability and compatibility of the method for detecting prominent boundaries in various images. These boundaries - forming regions, make the basis for object detection and identification.

关键词： Image segmentation Pixel Image color analysis biomedical imaging Humans Image edge detection back

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