Land utilization change driving force screening method and device based on LASSO regression

A screening method and driving force technology, applied in data processing applications, design optimization/simulation, special data processing applications, etc., can solve problems such as the screening of variables that cannot be driving forces, and achieve the effect of accurate screening

Active Publication Date: 2018-11-06
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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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).

Method used

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  • Land utilization change driving force screening method and device based on LASSO regression
  • Land utilization change driving force screening method and device based on LASSO regression
  • Land utilization change driving force screening method and device 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 land utilization change driving force screening method and device based on LASSO regression. The method comprises the steps that explanatory variable and response variable data in a research region is acquired; a LASSO regression model is constructed, and LASSO regression is executed; a residual sum of squares and multi-colinearity indexes in each step of LASSO regressionare calculated, and driving factors needing to be eliminated are determined according to calculation results; remaining driving factors are used as explanatory variables of the LASSO regression modelto execute LASSO regression again; and the importance of the driving factors is determined according to coefficients of response variables in the LASSO regression executed again. Through the screening method and device, a refined model can be constructed, variable screening and complexity adjustment can be performed during fitting of a generalized linear model, and accurate screening can be performed according to numerous dependent variables in multi-colinearity. The screening method and device can be widely applied to the environment modeling field.

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 Applications(China)
IPC IPC(8): G06F17/50G06Q50/26
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
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