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  1. Chemical decomposition by normalization of millimeter-wave spectra [electronic resource].

    Washington, D.C. : United States. Dept. of Energy. ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1996

    The sharp, distinct absorption spectra of chemicals at low pressures in the mm wave range become broadened at high pressures, so that detecting and quantifying different chemicals at high pressures become difficult. This paper proposes a method of decomposition based on the low pressure spectra. Normalized low pressure spectral amplitudes are used as features to train a neural network. The network is tested using the peak spectra obtained for an unknown plume of chemicals at high pressure. Initial tests conducted on simulated and experimental spectra of selected chemicals show that the decomposition results of the proposed method are dependent on the dominance of the chemicals in the mixture - a characteristic common to conventional methods of decomposition.

    Online OSTI

  2. Analysis for thermo-chemical decomposition of composite structures [microform] : interim report (June 1992 to June 1993)

    Ganesan, Ramnath
    University Park, Pa. : Dept. of Engineering Science and Mechanics, Pennsylvania State University ; [Huntsville, Ala.] : National Aeronautics and Space Administration, Marshall Flight Center, [1993]

  3. Analysis for thermo-chemical decomposition of composite structures [microform] : final report

    Salamon, N. J.
    University Park, PA : Pennsylvania State University, College of Engineering ; [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1995]

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