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  • Belief, L84 - Personal, Professional, and Business Services, O33 - Technological Change: Choices and Consequences  (1)
  • Seismology  (1)
  • Oxford University Press  (2)
  • 1
    Publication Date: 2014-08-10
    Description: Acting as temporary clusters, trade fairs can turn into trans-local learning spaces in global industrial communities. However, up to now, how temporary gatherings are related to regional/national economies has not yet been systematically investigated. This article approaches the question with an international comparative study of trade fairs in Asian economies. Generally, consistent with a dynamic interpretation of temporary clusters, trade fairs exhibit a more diverse configuration of participants, being a setting more compatible for knowledge creation, in more developed Asian economies. However, structures of trade fairs are also influenced by organizational features of embedded economies. Further, seven flagship electronics fairs suggest an architecture of global temporary networks of clusters for high-end learning processes in the global knowledge economy.
    Keywords: D83 - Search ; Learning ; Information and Knowledge ; Communication ; Belief, L84 - Personal, Professional, and Business Services, O33 - Technological Change: Choices and Consequences ; Diffusion Processes, O53 - Asia including Middle East, R11 - Regional Economic Activity: Growth, Development, and Changes
    Print ISSN: 1468-2702
    Electronic ISSN: 1468-2710
    Topics: Geography , Economics
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  • 2
    Publication Date: 2017-01-01
    Description: Surface-related multiples have been utilized in the reverse-time migration (RTM) procedures, and additional illumination for subsurface can be provided. Meanwhile, many cross-talks are generated from undesired interactions between forward- and backward-propagated seismic waves. In this paper, subsequent to analysing and categorizing these cross-talks, we propose RTM of first-order multiples to avoid most undesired interactions in RTM of all-order multiples, where only primaries are forward-propagated and crosscorrelated with the backward-propagated first-order multiples. With primaries and multiples separated during regular seismic data processing as the input data, first-order multiples can be obtained by a two-step scheme: (1) the dual-prediction of higher-order multiples; and (2) the adaptive subtraction of predicted higher-order multiples from all-order multiples within local offset-time windows. In numerical experiments, two synthetic and a marine field data sets are used, where different cross-talks generated by RTM of all-order multiples can be identified and the proposed RTM of first-order multiples can provide a very interpretable image with a few cross-talks.
    Keywords: Seismology
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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