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Method and device for screening driving force of land use change based on lasso regression

A screening method and driving force technology, applied in the field of environmental modeling, can solve problems such as the screening of variables that cannot be driving forces, and achieve the effect of accurate screening

Active Publication Date: 2021-11-23
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in a complex land system, there are many types of driving forces of land use change, and the current spatial model cannot well screen out the variables of many driving forces with multicollinearity (also known as multicollinearity).

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  • Method and device for screening driving force of land use change based on lasso regression
  • Method and device for screening driving force of land use change based on lasso regression
  • Method and device for screening driving force of land use change based on lasso regression

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Embodiment Construction

[0034] refer to figure 1 , a method for screening driving forces of land use change based on LASSO regression, including the following steps:

[0035] Obtain land use change data and driving factor data for at least two time periods in the study area;

[0036] Taking land use change as the response variable of the LASSO regression model, taking the driving factor as the explanatory variable of the LASSO regression model, constructing the LASSO regression model, and performing the first LASSO regression;

[0037] Calculate the residual sum of squares and multicollinearity index for each step in the first LASSO regression, and determine the driving factors that need to be eliminated according to the calculated residual sum of squares and multicollinearity index;

[0038] Using land use change as the response variable of the LASSO regression model and the remaining driving factors as the explanatory variables of the LASSO regression model, a second LASSO regression is performed;...

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Abstract

The invention discloses a method and device for screening the driving force of land use change based on LASSO regression, wherein the method includes the following steps: obtaining explanatory variable and response variable data in the research area; constructing a LASSO regression model, and performing LASSO regression; calculating LASSO Residual sum of squares and multicollinearity indicators in each step of the regression, determine the driving factors that need to be eliminated according to the calculation results; use the remaining driving factors as the explanatory variables of the LASSO regression model, and execute the LASSO regression again; according to the re-executed LASSO regression The coefficient of the response variable determines the importance of the driver. The invention can construct a relatively refined model, can perform variable screening and complexity adjustment while fitting a generalized linear model, and can accurately screen many dependent variables with multiple collinearity. The invention can be widely used in the field of environment modeling.

Description

technical field [0001] The invention relates to the field of environmental modeling, in particular to a method and device for screening driving force of land use change based on LASSO regression. Background technique [0002] Land use change is an important content of current global change research, and it is the link between human social and economic activities and natural ecological processes. Land use change can change the structure and function of ecosystems through biophysical and biogeochemical effects, and affect ecosystem services. Identifying the relationship between the driving force of land use change (driving factor) and land use change plays a crucial role in predicting the response of terrestrial ecosystems to global changes and formulating mitigation measures. Driving forces refer to the main natural and human factors that lead to changes in land use patterns and purposes. In natural systems, climate, soil, hydrology, etc. are considered to be the main drivin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F17/18G06Q50/26G06F111/04
CPCG06Q50/26G06F30/20
Inventor 王琦李芳柏刘建锋于焕云孙蔚旻郝冬梅潘苏红
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI