Information Retrieval Technology 8th Asia Information Retrieval Soci

This book constitutes the refereed proceedings of the 8th Information Retrieval Societies Conference, AIRS 2012, held in Tianjin, China, in December 2012. The 22 full papers and 26 poster presentations included in this volume were carefully reviewed and s

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Editorial Board David Hutchison Lancaster University, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Alfred Kobsa University of California, Irvine, CA, USA Friedemann Mattern ETH Zurich, Switzerland John C. Mitchell Stanford University, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel Oscar Nierstrasz University of Bern, Switzerland C. Pandu Rangan Indian Institute of Technology, Madras, India Bernhard Steffen TU Dortmund University, Germany Madhu Sudan Microsoft Research, Cambridge, MA, USA Demetri Terzopoulos University of California, Los Angeles, CA, USA Doug Tygar University of California, Berkeley, CA, USA Gerhard Weikum Max Planck Institute for Informatics, Saarbruecken, Germany

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Yuexian Hou Jian-Yun Nie Le Sun Bo Wang Peng Zhang (Eds.)

Information Retrieval Technology 8th Asia Information Retrieval Societies Conference, AIRS 2012 Tianjin, China, December 17-19, 2012 Proceedings

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Volume Editors Yuexian Hou Tianjin University, School of Computer Science and Technology 300072 Tianjin, China E-mail: [email protected] Jian-Yun Nie University of Montreal, DIRO CP. 6128, succursale Centre-ville, Montreal, H3C 3J7, QC, Canada E-mail: [email protected] Le Sun Chinese Academy of Sciences Institute of Software, Storage & Information Retrieval Laboratory 100190 Beijing, China E-mail: [email protected] Bo Wang Tianjin University, School of Computer Science and Technology 300072 Tianjin, China E-mail: [email protected] Peng Zhang Robert Gordon University, School of Computing St Andrew Street, Aberdeen, AB25 1HG, UK E-mail: [email protected] ISSN 0302-9743 e-ISSN 1611-3349 ISBN 978-3-642-35340-6 e-ISBN 978-3-642-35341-3 DOI 10.1007/978-3-642-35341-3 Springer Heidelberg Dordrecht London New York Library of Congress Control Number: 2012953221 CR Subject Classification (1998): H.3, H.4, F.2.2, I.4-5, E.1, H.2.8 LNCS Sublibrary: SL 3 – Information Systems and Application, incl. Internet/Web and HCI © Springer-Verlag Berlin Heidelberg 2012 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, I