A Method for Selecting Spectral Wavenumber
A spectral wavenumber and wavenumber technology, applied in the field of spectral analysis, can solve the problems of difficulty in determining the size of the wavelength range, eliminating irrelevant wavelengths, affecting the robustness and accuracy of the model, and achieving the effect of good robustness and high accuracy
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[0029] The specific implementation manner of the present invention will be described in detail with reference to the accompanying drawings and specific examples of Raman spectrum analysis.
[0030] figure 1It is a flow chart of the spectral feature wavenumber selection method based on the cooperation of the variable projection importance coefficient and the partial least squares regression coefficient proposed by the present invention.
[0031] In this specific example, a Raman spectrum data sample of biodiesel blend oil is used to verify the method of the present invention. The data set contains 62 samples measured by Raman spectroscopy, and the mass content of biodiesel ranges from 0% to 100% (w / w). The relationship between Raman spectroscopy and the concentration of biodiesel in blend oil is investigated. A total of 2033 wavenumbers are obtained after linear interpolation in the wavenumber interval of the Raman spectrum. The original spectrum of the sample is shown in fi...
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