The Experts below are selected from a list of 36975 Experts worldwide ranked by ideXlab platform

Zi-ju Liao - One of the best experts on this subject based on the ideXlab platform.

  • Kolmogorov’s hypotheses and Global Energy spectrum of turbulence
    Physics of Fluids, 2015
    Co-Authors: Zi-ju Liao, Weidong Su
    Abstract:

    We relate the justification of Kolmogorov’s hypotheses on the local isotropy and small-scale universality in real turbulent flows to an observed universality of basis independence for the Global Energy spectrum and Energy flux of small-scale turbulence. To readily examine the small-scale universality, an approach is suggested that investigates the Global Energy spectrum in a general spectral space for which the nonlinear interscale interaction may not be Fourier-triadic. Specific verifications are performed based on direct numerical simulations of turbulence in a spherical geometry and reexaminations of several existing results for turbulent channel flows.

  • kolmogorov s hypotheses and Global Energy spectrum of turbulence
    Physics of Fluids, 2015
    Co-Authors: Zi-ju Liao, Weidong Su
    Abstract:

    We relate the justification of Kolmogorov’s hypotheses on the local isotropy and small-scale universality in real turbulent flows to an observed universality of basis independence for the Global Energy spectrum and Energy flux of small-scale turbulence. To readily examine the small-scale universality, an approach is suggested that investigates the Global Energy spectrum in a general spectral space for which the nonlinear interscale interaction may not be Fourier-triadic. Specific verifications are performed based on direct numerical simulations of turbulence in a spherical geometry and reexaminations of several existing results for turbulent channel flows.

Weidong Su - One of the best experts on this subject based on the ideXlab platform.

  • Kolmogorov’s hypotheses and Global Energy spectrum of turbulence
    Physics of Fluids, 2015
    Co-Authors: Zi-ju Liao, Weidong Su
    Abstract:

    We relate the justification of Kolmogorov’s hypotheses on the local isotropy and small-scale universality in real turbulent flows to an observed universality of basis independence for the Global Energy spectrum and Energy flux of small-scale turbulence. To readily examine the small-scale universality, an approach is suggested that investigates the Global Energy spectrum in a general spectral space for which the nonlinear interscale interaction may not be Fourier-triadic. Specific verifications are performed based on direct numerical simulations of turbulence in a spherical geometry and reexaminations of several existing results for turbulent channel flows.

  • kolmogorov s hypotheses and Global Energy spectrum of turbulence
    Physics of Fluids, 2015
    Co-Authors: Zi-ju Liao, Weidong Su
    Abstract:

    We relate the justification of Kolmogorov’s hypotheses on the local isotropy and small-scale universality in real turbulent flows to an observed universality of basis independence for the Global Energy spectrum and Energy flux of small-scale turbulence. To readily examine the small-scale universality, an approach is suggested that investigates the Global Energy spectrum in a general spectral space for which the nonlinear interscale interaction may not be Fourier-triadic. Specific verifications are performed based on direct numerical simulations of turbulence in a spherical geometry and reexaminations of several existing results for turbulent channel flows.

Tom Beck - One of the best experts on this subject based on the ideXlab platform.

Oleg P. Dimitriev - One of the best experts on this subject based on the ideXlab platform.

  • Global Energy Consumption Rates : Where is the Limit ?
    Science and Education, 2013
    Co-Authors: Sustainable Energy, Education Publishing, Oleg P. Dimitriev
    Abstract:

    Page 1. Sustainable Energy, 2013, Vol. 1, No. 1, 1-6 Available online at http://pubs.sciepub. com/rse/1/1/1 © Science and Education Publishing DOI: 10.12691 / rse - 1 - 1 - 1 Global Energy Consumption Rates: Where is the Limit? Oleg P. Dimitriev* ...

Adriano Oliveira Andrade - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of laryngeal disorders through the Global Energy of speech
    IEEE Latin America Transactions, 2011
    Co-Authors: Marlice Fernandes, Fernando Eduardo Resende Mattioli, Edgard Afonso Lamounier, Adriano Oliveira Andrade
    Abstract:

    Voice analysis is an important tool in the diagnosis of laryngeal disorders. Among distinct signal processing techniques employed for voice analysis, the spectrogram is commonly used, as it allows for a visualization of the variation of the Energy of the signal as a function of both time and frequency. In this context, this study investigates the use of the Global Energy of the signal, estimated through the spectrogram, as a tool for discrimination between signals obtained from healthy and pathological subjects. This research has also exploited the potential use of the Global Energy of the voice signal to discriminate distinct laryngeal disorders. In total, 94 subjets were involved in this study, from which 46 were dysphonic and 48 normal. The diagnosis of laryngeal disorders was confirmed by means of a videolaryngoscopic examination. Participants were also subjected to a clinical examination of vocal acoustic through the recording of the sustained vowel /e/. The Global Energy allowed for the discrimination between normal and disphonic voice. Furthermore, this technique could discriminate the voice signal of patients suffering from left vocal fold paralysis from those suffering from other investigated disorders. The results suggest the Global Energy of the signal as an auxiliary and alternative tool for the diagnosis between normal and dysphonic voice.

  • Assessment of laryngeal disorders through the Global Energy of speech
    IEEE Latin America Transactions, 2011
    Co-Authors: Marlice Fernandes, Fernando Eduardo Resende Mattioli, Edgard Afonso Lamounier, Adriano Oliveira Andrade
    Abstract:

    Voice analysis is an important tool in the diagnosis of laryngeal disorders. Among distinct signal processing techniques employed for voice analysis, the spectrogram is commonly used, as it allows for a visualization of the variation of the Energy of the signal as a function of both time and frequency. In this context, this study investigates the use of the Global Energy of the signal, estimated through the spectrogram, as a tool for discrimination between signals obtained from healthy and pathological subjects. This research has also exploited the potential use of the Global Energy of the voice signal to discriminate distinct laryngeal disorders. In total, 94 subjets were involved in this study, from which 46 were dysphonic and 48 normal. The diagnosis of laryngeal disorders was confirmed by means of a videolaryngoscopic examination. Participants were also subjected to a clinical examination of vocal acoustic through the recording of the sustained vowel /ε/. The Global Energy allowed for the discrimination between normal and disphonic voice. Furthermore, this technique could discriminate the voice signal of patients suffering from left vocal fold paralysis from those suffering from other investigated disorders. The results suggest the Global Energy of the signal as an auxiliary and alternative tool for the diagnosis between normal and dysphonic voice.