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Spatial distribution forecasting method for heavy metal of cadmium in flat terrain area soil

A technology of spatial distribution and prediction method, applied in the direction of neural learning method, biological neural network model, etc., can solve the problem of inability to reasonably select and express the influencing factors of the spatial distribution of heavy metals in soil in flat terrain areas, and the inability to accurately obtain the spatial distribution information of heavy metals in regional soil And other issues

Inactive Publication Date: 2017-05-31
SICHUAN AGRI UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for predicting the spatial distribution of heavy metal cadmium in soil in gentle terrain, aiming at solving the problem that the existing spatial distribution prediction method for heavy metal cadmium in soil cannot reasonably select and express the influencing factors of the spatial distribution of heavy metal in soil in gentle terrain. It can accurately capture the non-linear relationship between various influencing factors and soil heavy metals, so that it is impossible to accurately obtain the spatial distribution information of regional soil heavy metals

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  • Spatial distribution forecasting method for heavy metal of cadmium in flat terrain area soil
  • Spatial distribution forecasting method for heavy metal of cadmium in flat terrain area soil
  • Spatial distribution forecasting method for heavy metal of cadmium in flat terrain area soil

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[0090] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0091] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0092] The embodiment of the present invention provides a method for predicting the spatial distribution of heavy metal cadmium in soil in a gentle terrain area. The method for predicting the spatial distribution of heavy metal cadmium in soil in a gentle terrain area includes:

[0093] Firstly, the radial basis function neural network model is used to establish the nonlinear mapping relationship between various influencing factors and soil cadmium content; for the change of correlatio...

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Abstract

The invention discloses a spatial distribution forecasting method for heavy metal of cadmium in flat terrain area soil. The method comprises: firstly, utilizing a radial basis function neural network model to create the non-linear mapping relationships of various influencing factors on the cadmium content in soil; based on the change of correlation of the various influencing factors in different scopes from an analyzing region, dividing the analyzing region into a region within a 10km scope and a region beyond a 10km scope; constructing neural network models that reveal the non-linear mapping relationships of the various influencing factors on the cadmium content in soil respectively; and using the HASM model to simulate the residuals of the forecasting result by the neural network models so as to obtain the forecasting result of the spatial distribution of cadmium in soil in the analyzing region. According to the invention, the forecasting accuracy of the forecasting result to the verification point increases by 5.56% to 17.65%. And at the same time, the method could well reflect the detailed information of the spatial change of cadmium content in soil in an analyzing region.

Description

technical field [0001] The invention belongs to the technical field of measuring soil heavy metal content, and in particular relates to a method for predicting the spatial distribution of heavy metal cadmium in soil in flat terrain areas. Background technique [0002] Soil change is one of the important contents of the current global environmental change. In recent years, with the rapid development of social economy, the large-scale application of chemical fertilizers and pesticides, and the continuous increase of industrial sewage discharge, the pressure on my country's soil environment is increasing. Among them, soil heavy metal pollution, which has poor mobility and is difficult to be degraded by microorganisms, is particularly serious. Soil heavy metal pollution will not only lead to crop yield reduction or failure, but also enter the food chain or pollute the atmosphere, endanger the health of humans and animals, and cause chronic diseases. At present, about 1 / 5 of the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N3/08
CPCG06N3/08
Inventor 李启权肖怡王昌全彭月月李珊代天飞岳天祥史文娇罗由林张浩张新蒋欣烨李冰高雪松王栋罗琳谢云波易蔓
Owner SICHUAN AGRI UNIV
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