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Quasi-continuous spectroscopic wavelength combination method

A wavelength combination and quasi-continuous technology, which is applied in the field of quasi-continuous spectral wavelength combination, can solve problems such as the unsatisfactory computer operation speed, and achieve the effects of reducing the amount of calculation, increasing the degree of freedom, and reducing complexity

Inactive Publication Date: 2012-07-18
JINAN UNIVERSITY
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Problems solved by technology

However, there are a lot of wavelengths in the near-infrared band, and the near-infrared band is 780-2526nm. If the wavelength interval is 0.5nm, then the total number of wavelengths is 3493. If the suitable wavelength is selected by random combination and modeled separately, The computing speed of the existing computer is far from being able to meet the

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  • Quasi-continuous spectroscopic wavelength combination method
  • Quasi-continuous spectroscopic wavelength combination method
  • Quasi-continuous spectroscopic wavelength combination method

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Embodiment

[0035]At present, the small and dedicated near-infrared spectroscopic system is required to find out the appropriate combination of several wavelengths from so many wavelengths, so that its near-infrared analysis model has good prediction effect and high stability. The prediction effect of the near-infrared analysis model is confirmed by experiments. On the one hand, the near-infrared spectrum measurement experiment of the sample (using a full-band general-purpose near-infrared analysis instrument), on the other hand, uses conventional biochemical methods to analyze the target of the sample. Quantitative analysis (as reference chemical value). Firstly, the samples are divided into calibration set and prediction set, and the above two aspects of data are used to establish a calibration prediction model, and a specific wavelength combination is screened out according to the effect of the model. Taking the near-infrared analysis of glucose content in human serum as an example, th...

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Abstract

The invention discloses a quasi-continuous spectroscopic wavelength combination method. The steps of the method are as follows: S1, testing spectroscopic data and a reference chemical value of a sample, and selecting a waveband; S2, setting the range of wavelength combination points N and the range of a wavelength combination gap G; S3, N=Nmin and G=Gmin; S4, setting that a wavelength combinationstaring point B is changed sequentially from the first wavelength to the last one in the waveband, searching all parameter combinations of B, N and G, and establishing a model; S5, judging whether G is smaller than Gmax, adding G and returning to S4 if G is smaller than Gmax, and entering S6 if G is equal to Gmin; S6, judging whether N is smaller than Nmax, adding N and returning to S4 if N is smaller than Nmax, otherwise entering S7; S7, calculating evaluation indexes of all mathematic models, selecting the best model and obtaining the corresponding wavelength combination. The invention has the advantages of less calculation amount, high selection freedom and good effect.

Description

technical field [0001] The invention relates to the technical field of wavelength optimization in optical splitting system design, in particular to a method for combining splitting wavelengths in a quasi-continuous mode. Background technique [0002] Spectral analysis is a method to identify a substance and determine its chemical composition and content according to its spectrum, because it has the advantages of sensitivity and rapidity. Spectral analysis currently used mainly includes mid-infrared spectroscopy, ultraviolet-visible spectroscopy, Raman spectroscopy, and near-infrared spectroscopy (NIRS). In particular, near-infrared spectroscopy has been widely used in agriculture, food, biomedicine, petrochemical and other fields due to its simplicity, rapidity, non-destructiveness and ease of real-time analysis. [0003] The technology of developing full-band general-purpose analytical instruments has been relatively mature abroad, but some instruments are huge and expensi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G06F17/50
Inventor 潘涛
Owner JINAN UNIVERSITY
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