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  • Trans Tech Publications, Ltd.  (4)
  • Xie, Qin  (4)
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  • Trans Tech Publications, Ltd.  (4)
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  • 1
    Online Resource
    Online Resource
    Carrier Modulation Technology Based on Orthogonal Frequency Division Multiplexing
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 774-776 ( 2013-9), p. 1671-1676
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 774-776 ( 2013-9), p. 1671-1676
    Abstract: This paper first analyzes the transmission characteristics of low-voltage power line channels with the focus on the study of carrier modulation technology regarding the power line communication part, then proposes the orthogonal frequency division multiplexing technology that serves for the digital communication of family network power line communication gateways, analyzes the OFDM system principle, actulizes OFDM modulation and demodulation through discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT), and build the OFDM simulation model. Finally, a specific plan of using power lines as the family network transmission media is proposed.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.774-776
    DOI: 10.4028/www.scientific.net/AMR.774-776.1671
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Elastic-Plastic Contact Analysis of Materials with Gradient Yield Strength
    Trans Tech Publications, Ltd. ; 2006
    In:  Materials Science Forum Vol. 532-533 ( 2006-12), p. 881-884
    Details
    In: Materials Science Forum, Trans Tech Publications, Ltd., Vol. 532-533 ( 2006-12), p. 881-884
    Abstract: Reported in the paper is an elastic-plastic contact model developed to analyze the contact performance characteristics of materials with gradient yield strength. Plastic yielding and the strain-hardening properties of the materials are taken into account. The finite element method, the initial stiffness method, and a mathematical programming technique are utilized to solve the contact model. The von Mises yield criterion is used to determine the inception of plastic deformation. Results indicate that nitrided material with appropriate gradient of yield strength may greatly alter the distributions of contact stress, contact pressure as compared with untreated material in contact. The effects of different yield strength variation path of material on von Mises stress distributions are numerically investigated and discussed.
    Type of Medium: Online Resource
    ISSN: 1662-9752
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/MSF.532-533
    DOI: 10.4028/www.scientific.net/MSF.532-533.881
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2006
    detail.hit.zdb_id: 2047372-2
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Triple-Network Convergence of Power Lines as a Transmission
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 321-324 ( 2013-6), p. 1264-1269
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 321-324 ( 2013-6), p. 1264-1269
    Abstract: By analyzing the transmission characteristics of power line and the orthogonal frequency division multiplexing (OFDM) communication system, the concrete scheme of triple-network convergence based on the transmission medium of power line was given out. The Methods of constructing the intelligent triple-network convergence based on the OFDM technology, the system model and the hardware realization methods of power line communication system based on the DSP chip were given. Combining the latest OFDM technology, the channel coding technology and the modulation and demodulation technology in the power line communication system were researched, and new technology to high-speed data transmission on the radio channel was achived. And the simulation results of system design was given.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.321-324
    DOI: 10.4028/www.scientific.net/AMM.321-324.1264
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2251882-4
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Thermal Effects on Elasto-Plastic Contacts between Rough Surfaces
    Trans Tech Publications, Ltd. ; 2006
    In:  Materials Science Forum Vol. 532-533 ( 2006-12), p. 801-804
    Details
    In: Materials Science Forum, Trans Tech Publications, Ltd., Vol. 532-533 ( 2006-12), p. 801-804
    Abstract: The effects of the steady-state frictional heating on the contact performance of surface asperities and subsurface stress fields between rough surfaces are investigated in this paper. The asperity distortion caused by the temperature variation in a tribological process, micro plastic flow of surface asperities, and the coupled thermo-elasto-plastic behavior of the materials, with and without considering the strain-hardening property of the materials are studied. In addition, the contact pressure, real area of contact, and average gap of real rough surface with different frictional heat inputs under the thermal elasto-plastic contact conditions are analyzed and discussed.
    Type of Medium: Online Resource
    ISSN: 1662-9752
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/MSF.532-533
    DOI: 10.4028/www.scientific.net/MSF.532-533.801
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2006
    detail.hit.zdb_id: 2047372-2
    Location Call Number Limitation Availability
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    Online Resource
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