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Method and device for determining soil lead content prediction model based on terahertz spectrum

A technology for predicting models and determining methods, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as inaccurate analysis results of lead content in soil

Active Publication Date: 2020-03-06
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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Problems solved by technology

However, when using terahertz spectroscopy to analyze soil lead content, the results of soil lead content analysis are not accurate enough.

Method used

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  • Method and device for determining soil lead content prediction model based on terahertz spectrum
  • Method and device for determining soil lead content prediction model based on terahertz spectrum
  • Method and device for determining soil lead content prediction model based on terahertz spectrum

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Embodiment Construction

[0052] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and cannot limit the protection scope of the present invention with this.

[0053] Before introducing the embodiments of the present invention, the concept of the embodiments of the present invention will be introduced first. The present inventor finds after independent research and analysis based on the detection results of the chemical binding state content of lead in the lead-containing soil, lead mainly exists in the carbonate binding state and iron-manganese oxide binding state after entering the soil, and other The content of bound state is relatively small, and the content of lead in different bound states changes with the change of pH. As shown in Table 1, the content of lead in different binding states changes with the ch...

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Abstract

The embodiment of the invention discloses a method and device for determining a soil lead content prediction model based on a terahertz spectrum. The method comprises the steps of: respectively carrying out feature extraction on terahertz spectrum data of sample soil in each pH value interval by adopting different feature extraction modes; inputting feature extraction results obtained by adoptingdifferent feature extraction modes into different soil lead content prediction models to obtain a plurality of lead content prediction results under various combinations of the different feature extraction modes and the different soil lead content prediction models; and determining an optimal feature extraction mode and an optimal soil lead content prediction model combination corresponding to thesoil in each pH value interval according to the plurality of lead content prediction results respectively corresponding to the sample soils in the pH value intervals. According to the embodiment of the invention, the combination of an optimal feature extraction mode and an optimal soil lead content prediction model suitable for soil in different pH value intervals can be determined.

Description

technical field [0001] The invention relates to the technical field of soil detection, in particular to a method and device for determining a soil lead content prediction model based on terahertz spectroscopy. Background technique [0002] Lead pollution is one of the main forms of soil heavy metal pollution. Lead is biotoxic, non-degradable, and accumulative in organisms. After entering the soil, it is easy to accumulate in the surface soil in different chemical forms through dissolution, precipitation, complexation, and adsorption. It is the main place for the material and nutrient exchange between the root system of crops and the soil. Therefore, lead may enter the human body through the food chain, and after accumulating in the human body to a certain concentration, it will harm the human visceral tissue, nervous system, bone hematopoietic system, etc. It can be seen that the detection of lead content in soil is of great significance for the risk control of agricultura...

Claims

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Application Information

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IPC IPC(8): G16C20/70G01N21/3563G01N21/3581
CPCG16C20/70G01N21/3563G01N21/3581
Inventor 李斌李超罗斌闫华陈文焘
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI
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