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Chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform

A dual-tree complex wavelet and overlapping peak technology, applied in the field of spectrum processing, can solve the problems that the overlapping peak signal cannot accurately reflect the peak position and area characteristics, cannot accurately separate and reconstruct the original signal, and the peak shape is prone to distortion. Achieve the effects that are conducive to accurate analysis and processing, suppress aliasing, and run fast

Inactive Publication Date: 2016-06-15
SOUTHEAST UNIV
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Problems solved by technology

[0007] In view of the poor anti-aliasing performance of the classical discrete wavelet transform in the existing technology, the original signal cannot be accurately separated and reconstructed, which eventually leads to low resolution and easy distortion of the peak shape, and the decomposed overlapping peak signal cannot accurately reflect the peak position characteristics and area characteristics, etc., a method is proposed to firstly extract the overlapping signal segments of the spectrogram, use the dual-tree complex wavelet transform with excellent anti-aliasing performance to decompose the overlapping signal, and select the appropriate detail coefficients for amplification and reconstruction, and finally achieve Method for Separation of Chromatographic Overlapping Peaks

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  • Chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform
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  • Chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] Such as Figure 1-6 As shown, the present invention is based on the dual-tree complex wavelet transform chromatographic overlapping peak decomposition method, utilizes dual-tree complex wavelet decomposition and reconstruction of overlapping peak signals, and specifically includes the following steps:

[0039] figure 1 It is a flow chart when the present invention is implemented, figure 2 is the experimentally measured amino acid chromatogram.

[0040] Step 1. Acquisition and preprocessing of chromatographic signals: use a chromatograph to obtain chromatographic signals, and perform moving average filtering and baseline subtraction on the collected spectra to obtain a signal f, the spectra are as follows image 3 shown.

[0041] Depend on image 3 It can be obtained that there are five groups of obvious overlapping peaks in the ran...

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Abstract

The invention discloses a chromatographic overlapping peak decomposition method based on dual-tree complex wavelet transform; dual-tree complex wavelet transform is mainly adopted for decomposing chromatographic signals, and chromatographic overlapping peaks are separated by means of amplifying detail coefficients to reconstruct the signals. The method includes the steps of acquisition and preprocessing of the chromatographic signals, dual-tree complex wavelet decomposition and extraction of the detail coefficients, amplification of the detail coefficients, dual-tree complex wavelet reconstruction, and sidelobe suppression and reduction of spectra. Results show that the dual-tree complex wavelet transform effectively overcomes the disadvantages of poor aliasing resistance and translation sensitivity of traditional discrete wavelet transform, the effect of decomposition of the overlapping signals is better than that of a general real wavelet, and the accuracy of original spectrum peak characteristics and quantitative and qualitative analysis is ensured.

Description

technical field [0001] The invention belongs to the technical field of spectrum processing, and relates to a method for decomposing overlapping peaks based on dual-tree complex wavelet transform. Background technique [0002] Chromatography, also known as chromatographic analysis, chromatographic analysis, and chromatography, is a separation and analysis method that is widely used in analytical chemistry, organic chemistry, biochemistry and other fields. In recent years, with the improvement of chromatographic separation technology, chemical substances can be effectively separated. Quantitative and qualitative analysis of experimental samples is the most critical step in chromatographic analysis. The resolution of overlapping peaks has a great influence on the quantitative and qualitative analysis of chromatography. [0003] At present, there are many methods for overlapping peak decomposition, such as curve fitting, Fourier transform, derivative method, wavelet transform,...

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Application Information

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IPC IPC(8): G01N30/86
CPCG01N30/86
Inventor 王爱民徐龙
Owner SOUTHEAST UNIV
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