Method and system for identifying transmission chain of meal-containing soil pollutants to human body

Abstract

The invention provides a method and a system for identifying a transmission chain of meal-incorporated soil pollutants to a human body, and relates to the technical field of big data analysis and processing, and the method comprises the following steps: screening an investigation object, and obtaining population biological sample data of the investigation object; for the investigated object, respectively collecting soil quality data, crop pollution data and diet detection data corresponding to the investigated object; constructing a path equation according to the soil quality data, the crop pollution data, the diet detection data and the population biological sample data; introducing the path equation into a structural equation model to form a chain for transmitting the soil pollutants to the human body, and outputting a path coefficient according to the chain for transmitting the soil pollutants to the human body; and quantitatively calculating an indirect transfer proportion according to the path coefficient output by the transfer chain, and determining the proportion of the pollutants to be evaluated in the soil indirectly transferred to the human body through crops and diet paths.

Description

Technical Field

[0001] The present invention relates to the technical field of big data analysis and processing, and in particular to a method and system for identifying the transmission chain of soil pollutants incorporated into diet to the human body. Background Art

[0002] This section is intended to provide a background or context for embodiments of the present invention. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] At present, a large number of studies have reported the damage of heavy metals and other pollutants to human health. The overall soil environmental situation is not optimistic, among which heavy metals are the main type of pollution. Soil is one of the three important environments (water, soil, and air) on which humans depend for survival. However, the chain of migration and transmission of heavy metals in soil to the human body is unclear, and there is a lack of technical methods for quantitatively identifying the chain of transmission of soil pollutants to the human body. Therefore, the existing technology mainly has the following deficiencies:

[0004] The existing migration and transfer of heavy metals in soil is limited to the migration from soil to crops and cannot be traced back to the levels in the human body. Therefore, it cannot support the formulation of soil pollution-related control measures and standards from the perspective of health protection.

[0005] Since the technical methods related to the migration and transfer of heavy metals in soil still have the above-mentioned limitations, it is urgent to develop new technologies to overcome the unclear intermediate transfer links from soil heavy metals to human body levels and support the formulation of relevant control measures and standards for soil pollution.

[0006] In summary, there is an urgent need for a technical solution that can overcome the above-mentioned defects and effectively analyze soil pollution migration. Summary of the invention

[0007] In order to solve the problems existing in the prior art, the present invention proposes a method and system for identifying the transmission chain of soil pollutants from the diet to the human body. The present invention proposes a scheme for quantitatively identifying the transmission chain of soil pollutants from the human body, which helps to more accurately understand the transmission path of pollutants in the environment. The dietary situation of the population is taken into account in the transmission chain from soil to the human body, which makes the model closer to reality and improves the practicality and accuracy of the model. The structural equation model is used to analyze the chain transmission path. This method can handle the complex relationship between multiple variables and provide a systematic analysis framework. By obtaining the standardized coefficients of each link in the transmission, the contribution of each link to the transmission of pollutants can be quantified, providing a scientific basis for pollution control measures. The overall solution can support the formulation of soil pollution-related control measures and standards from the perspective of health protection, which is conducive to environmental protection and public health.

[0008] In a first aspect of an embodiment of the present invention, a method for identifying the transmission chain of soil pollutants from diet to human body is provided, comprising:

[0009] Screening survey subjects and obtaining biological sample data of the survey subjects;

[0010] For the survey subjects, soil quality data, crop pollution data, and dietary testing data corresponding to the survey subjects are collected respectively;

[0011] Constructing a path equation according to the soil quality data, the crop pollution data, the dietary detection data and the biological sample data of the population, wherein the soil quality data, the crop pollution data, the dietary detection data and the biological sample data of the population include the concentration of the pollutant to be evaluated and covariate data, the concentration of the pollutant to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation;

[0012] The path equation is introduced into the structural equation model to form a soil pollutant to human body transmission chain, and the path coefficient is output according to the soil pollutant to human body transmission chain;

[0013] According to the path coefficient output by the transfer chain, the indirect transfer ratio is quantitatively calculated to determine the proportion of the pollutants to be assessed in the soil that are indirectly transferred to the human body through crops and diet.

[0014] In a second aspect of the embodiment of the present invention, a system for identifying the transmission chain of soil pollutants from diet to human body is provided, comprising:

[0015] A population data acquisition module, used to screen survey subjects and obtain population biological sample data of the survey subjects;

[0016] A data collection module, for collecting soil quality data, crop pollution data, and dietary detection data corresponding to the survey object;

[0017] A path equation construction module, used to construct a path equation according to the soil quality data, crop pollution data, dietary detection data and population biological sample data, wherein the soil quality data, crop pollution data, dietary detection data and population biological sample data include the concentration of pollutants to be evaluated and covariate data, the concentration of pollutants to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation;

[0018] A structural equation model processing module, used for introducing the path equation into the structural equation model to form a soil pollutant to human body transmission chain, and outputting a path coefficient according to the soil pollutant to human body transmission chain;

[0019] The transfer ratio analysis module is used to quantitatively calculate the indirect transfer ratio based on the path coefficient output by the transfer chain, and determine the ratio of the pollutants to be evaluated in the soil indirectly transferred to the human body through crops and dietary pathways.

[0020] In a third aspect of an embodiment of the present invention, a computer device is proposed, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a method for identifying the chain of transmission of soil pollutants from diet to the human body is implemented.

[0021] In a fourth aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, a method for identifying the chain of transmission of soil pollutants included in the diet to the human body is implemented.

[0022] In a fifth aspect of an embodiment of the present invention, a computer program product is proposed, which includes a computer program, and when the computer program is executed by a processor, a method for identifying the chain of transmission of soil pollutants included in the diet to the human body is implemented.

[0023] The method and system for identifying the transmission chain of soil pollutants included in the diet to the human body proposed in the present invention obtains the biological sample data of the population of the survey subjects by screening the survey subjects; for the survey subjects, the soil quality data, crop pollution data, and dietary detection data corresponding to the survey subjects are respectively collected; a path equation is constructed based on the soil quality data, crop pollution data, dietary detection data, and biological sample data of the population, wherein the soil quality data, crop pollution data, dietary detection data, and biological sample data of the population include the concentration of pollutants to be evaluated and covariate data, the concentration of pollutants to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation; the path equation is introduced into a structural equation model to form a transmission chain of soil pollutants to the human body, and the path coefficient is output according to the transmission chain of soil pollutants to the human body; according to the path coefficient output by the transmission chain, the indirect transmission ratio is quantitatively calculated to determine the ratio of the pollutants to be evaluated in the soil that are indirectly transmitted to the human body through crops and dietary pathways. The present invention innovatively considers the diet of the population and other conditions in the chain of transmission from soil to the human body, constructs individual dietary patterns based on the dietary frequency method within a set time period, uses the structural equation model to analyze the chain transmission path, and obtains the standardized coefficients of each transmission link. Ultimately, a quantitative identification technology for the pollutant chain at the soil, crop, dietary, and human levels is formed, providing strong technical support for the formulation of soil pollution control measures and standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic flow chart of a method for identifying the chain of transmission of soil pollutants introduced into diet to human body according to an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the relationship between steps of a specific embodiment of the present invention.

[0027] Figure 3 It is a schematic diagram of a transmission chain according to a specific embodiment of the present invention.

[0028] Figure 4 It is a schematic diagram of the architecture of an identification system for the transmission chain of soil pollutants incorporated into diet to the human body according to an embodiment of the present invention.

[0029] Figure 5 It is a schematic diagram of the structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] Those skilled in the art will appreciate that the embodiments of the present invention may be implemented as a system, device, apparatus, method or computer program product. Therefore, the present disclosure may be specifically implemented in the following forms, namely: complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0032] According to an embodiment of the present invention, a method and system for identifying the transmission chain of soil pollutants incorporated into diet to human body are proposed, which relates to the technical field of big data analysis and processing.

[0033] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0034] Figure 1 FIG. 1 is a flow chart of a method for identifying the chain of soil pollutants introduced into the diet and transmitted to the human body according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0035] S101, screening survey subjects and obtaining biological sample data of the survey subjects;

[0036] S102, for the survey object, respectively collecting soil quality data, crop pollution data, and dietary detection data corresponding to the survey object;

[0037] S103, constructing a path equation based on the soil quality data, the crop pollution data, the dietary detection data, and the biological sample data of the population, wherein the soil quality data, the crop pollution data, the dietary detection data, and the biological sample data of the population include the concentration of the pollutant to be evaluated and covariate data, the concentration of the pollutant to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation;

[0038] S104, introducing the path equation into a structural equation model to form a soil pollutant to human body transmission chain, and outputting a path coefficient according to the soil pollutant to human body transmission chain;

[0039] S105, according to the path coefficient output by the transfer chain, quantitatively calculate the indirect transfer ratio to determine the ratio of the pollutants to be assessed in the soil indirectly transferred to the human body through crops and dietary pathways.

[0040] The present invention adopts quantitative identification technology and proposes a method for quantitatively identifying the transmission chain of soil pollutants to the human body, which helps to more accurately understand the transmission path of pollutants in the environment. The dietary situation of the population is taken into account in the transmission chain from soil to the human body, which makes the model closer to reality and improves the practicality and accuracy of the model. The structural equation model is used to analyze the chain transmission path. This method can handle the complex relationship between multiple variables and provide a systematic analysis framework. By obtaining the standardized coefficients of each transmission link, the contribution of each link to the transmission of pollutants can be quantified, providing a scientific basis for pollution control measures. The overall solution can support the formulation of soil pollution-related control measures and standards from the perspective of health protection, which is conducive to environmental protection and public health.

[0041] In order to explain more clearly the above-mentioned identification method of the transmission chain of soil pollutants from the diet to the human body, each step is explained in detail below.

[0042] In one embodiment, for S101, the survey subjects are screened and the biological sample data of the survey subjects are obtained.

[0043] The survey subjects at least include people who live in farming areas for a long time and engage in agricultural labor, and people who are exposed to pollutants;

[0044] For the farming areas, the agricultural land in the home of the survey subject is used as a sampling point, and the farming areas corresponding to each soil pollutant with a concentration higher than the first set concentration and lower than the second set concentration are investigated to collect soil quality data; wherein the soil quality data at least includes the concentration of the pollutant to be evaluated, pH, organic matter and cation exchange capacity detected based on the soil samples in the farming areas; the concentration of the pollutant to be evaluated is the main variable, and the pH, organic matter and cation exchange capacity are covariates.

[0045] In one embodiment, for S102, for the survey object, soil quality data, crop pollution data, and dietary detection data corresponding to the survey object are collected respectively.

[0046] For crop pollution data, crops grown in agricultural areas are collected, and the concentration of pollutants to be assessed is collected from crop samples;

[0047] For dietary detection data, dietary information of the survey subjects within a set time period is collected, and the dietary information at least includes food consumption status, edible oil and condiments; the consumed food is clustered according to the dietary information to obtain the dietary composition of the surveyed area or population; dietary samples are prepared according to the dietary information and dietary composition; the prepared dietary samples are homogenized, and the concentration of the pollutants to be evaluated in the dietary homogenate is detected;

[0048] For biological sample data of the population, the gender, age, education level, marital status, economic status, smoking, drinking, and BMI of the respondents were collected through questionnaires; blood and urine biological samples were collected from the respondents, and the concentrations of pollutants to be evaluated in the biological samples of the respondents and the urine creatinine concentration were tested; among them, the concentrations of pollutants to be evaluated in the biological samples of the respondents were taken as the main variable, and the gender, age, education level, marital status, economic status, smoking, drinking, BMI and urine creatinine concentration of the respondents were taken as covariates.

[0049] In one embodiment, for S103, a path equation is constructed based on the soil quality data, crop pollution data, dietary detection data and biological sample data of the population, wherein the soil quality data, crop pollution data, dietary detection data and biological sample data of the population include the concentration of pollutants to be evaluated and covariate data, the concentration of pollutants to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation.

[0050] Specifically, the path equation is expressed by the following relationship:

[0051] C 农作物 =β1·C 土壤 +β2·D 土壤 +∈1;

[0052] C膳食 =γ1·C 农作物 +∈2;

[0053] C 人群 =δ1·C 膳食 +∈3;

[0054] In the formula, C 土壤 , C 农作物 , C 膳食 , C 人群 are the concentrations of pollutants to be assessed in soil quality data, crop pollution data, dietary testing data, and population biological sample data, β1, γ1, and δ1 are standardization coefficients, and D 土壤 is the covariate corresponding to soil, β2 is the covariate coefficient corresponding to soil, ∈1, ∈2, and ∈3 are error terms respectively.

[0055] Data analysis can be used to construct a set of path equations that describe the relationship between variables. For example, the concentration of pollutants in soil may directly affect the concentration of pollutants in crops, and the concentration of pollutants in crops may further affect the concentration of pollutants in the diet, and ultimately affect the concentration of pollutants in human biological samples.

[0056] In one embodiment, for S104, the path equation is introduced into a structural equation model to form a soil pollutant to human body transmission chain, and a path coefficient is output according to the soil pollutant to human body transmission chain.

[0057] The main variable data and covariate data in the estimated path equation were statistically analyzed using soil quality data, crop pollution data, dietary testing data, and population biological sample data. A structural equation model was formed after fitting, and the model fitting index was used to verify the fitting effect of the model; wherein, the model fitting index at least included the comparative fit index (CFI), the Turkle-Lewis index (TLI), the root mean square error data (RMSEA), and the standardized root mean square residual (SRMR).

[0058] When the fitting effect reaches the set index, the soil pollutant to human body transmission chain is formed according to the structural equation model, and the path coefficient is output; wherein, the path coefficient for the concentration of the pollutant to be evaluated in the transmission chain is a positive number, indicating that the previous link in the path has a positive impact on the next link, and the higher the absolute value of the path coefficient, the greater the impact on the transmission chain.

[0059] In actual application scenarios, statistical software (such as AMOS, LISREL, Mplus, etc.) can be used to estimate the parameters in the path equation, and the model fitting effect can be further verified through model fitting indicators (such as CFI, TLI, RMSEA, SRMR).

[0060] By interpreting the path coefficient, we can determine the contribution of each link to pollutant transfer. We can calculate the indirect transfer ratio by multiplying the standardized coefficient of each link.

[0061] CFI (Comparative Fit Index): CFI is an indicator to measure the fit of the model, and its value is between 0 and 1. The closer the value is to 1, the better the model fit is. It is generally believed that a CFI value greater than or equal to 0.9 indicates a good model fit.

[0062] TLI (Tucker-Lewis Index): TLI is an indicator used to evaluate the model fit. Its value range is also between 0 and 1. The closer to 1, the better the fit. The closer the TLI value is to 1, the better the model fit. When TLI ≥ 0.90, the model fit is usually very good. A value greater than 0.80 is acceptable.

[0063] RMSEA (Root Mean Square Error of Approximation): RMSEA measures the degree of model error, and lower values ​​indicate better fit. Generally speaking, RMSEA values ​​less than 0.05 indicate a good model fit, and less than 0.1 indicates a good fit.

[0064] SRMR (Standardized Root Mean Square Residual): SRMR measures the degree of standardization of the residuals between the observed data and the model data. Smaller SRMR values ​​indicate better fit. Generally speaking, SRMR values ​​below 0.05 are acceptable and the model fit is considered good.

[0065] The above indicators are used to evaluate the fitting effect of the structural equation model and determine whether the model can well reflect the data structure. If the model fit is not good, it is necessary to modify the parameters in the model, improve the model fit by resetting the parameters, and repeat the above steps until an acceptable model fit is obtained.

[0066] In one embodiment, for S105, according to the path coefficient output by the transfer chain, the indirect transfer ratio is quantitatively calculated to determine the ratio of the pollutant to be assessed in the soil indirectly transferred to the human body through crops and dietary pathways, including:

[0067] The path coefficients corresponding to each link in the transmission chain are multiplied to determine the proportion of the pollutants to be assessed in the soil that are indirectly transmitted to the human body through crops and diet.

[0068] The following is a description of a specific embodiment. Figure 2 , is a schematic diagram of the relationship between the steps of a specific embodiment of the present invention, combined with Figure 2 As shown, the specific steps are:

[0069] S1, collect data on soil quality and heavy metal levels in crops, diet, and population:

[0070] 1. Investigation site: Based on the specific types of soil pollutants to be assessed, high-concentration and low-concentration agricultural areas are selected for investigation at the same time.

[0071] 2. Survey population: It can be people who live in the survey site for a long time and engage in agricultural labor, or it can be vulnerable and special populations exposed to pollutants (such as infants, children, etc.).

[0072] 3. Soil quality data: The agricultural land at the home of the survey subjects is used as a sampling point to collect soil samples and test the concentration of soil pollutants to be evaluated, pH, organic matter, cation exchange capacity, etc.

[0073] 4. Dietary survey and testing data:

[0074] 4.1. A 3-day 24-hour dietary recall survey was used to collect dietary information. The respondents reviewed their food consumption for 24 hours over the past 3 consecutive days, including the consumption of all foods eaten at home and outside, for meals and snacks. The total consumption of edible oil and condiments in the investigated households within 3 survey days was investigated by household weighing. Family members were asked to assist in recording food consumption. During the household visit, the investigators used the auxiliary record form to understand the food consumption of family members, and completed the compilation of dietary survey data in the interview on the day of the survey.

[0075] 4.2. Prepare total dietary samples. According to the results of the dietary survey, cluster the consumed foods (clustering at the village level is to calculate the daily consumption of various foods according to adult men; clustering at the individual level is to calculate the daily consumption of various foods according to each age group) to obtain the dietary composition of the surveyed area or population. Combined with the per capita consumption of various foods and the sample volume required for laboratory analysis, calculate the amount of cooking samples and the amount of condiments required for cooking. Weigh and prepare the various meals collected according to the processing requirements before cooking, remove the inedible part, and weigh the edible part again. In designated restaurants, kitchens or laboratories, use the cooking utensils used in local customs, cook the various prepared cooking ingredients according to local eating habits and cooking methods, and weigh the prepared samples after cooking.

[0076] 4.3. Homogenize the prepared samples and detect the concentration of the pollutant to be assessed in the dietary homogenate.

[0077] 5. Other population survey and test data: Gender, age, education level, marital status, economic status, smoking, drinking, BMI, etc. of the survey population are collected through questionnaires. Blood and urine biological samples are collected from the survey subjects. The concentration of pollutants to be evaluated and urine creatinine concentration in the biological samples of the survey subjects are tested.

[0078] 6. Crop pollution data: Collect the crops grown on the agricultural land of the survey subjects' homes. Crop sample collection should avoid unfavorable climatic conditions such as rainy days, and sampling should avoid plants with pests and diseases and other special conditions (such as plants that have just been sprayed with pesticides). Detect the concentration of pollutants to be evaluated in crops.

[0079] S2, using structural equation model to analyze the chain transmission path:

[0080] Constructing the path equation: The collected soil quality data, crop pollution data, dietary testing data, and population biological sample data (covariates include basic information of the survey population collected through questionnaires) are used to construct the path equation, in which the concentration of the pollutant to be evaluated in the medium of each link is the main variable to be investigated, and other variables are covariates.

[0081] Fitting the structural equation model: Introduce the constructed path equation into the structural equation model and output the path coefficient. Extract the standardized coefficient of the pollutants to be evaluated in the medium of each link. A positive standardized coefficient indicates that the previous link has a positive impact on the next link. The higher the absolute value of the coefficient, the greater the impact of this link through the chain.

[0082] refer to Figure 3 , which is a schematic diagram of a transmission chain of a specific embodiment of the present invention, in which β1, γ1, and δ1 are standardization coefficients, and β2 is the covariate coefficient corresponding to the soil.

[0083] The model fitting effect was judged by CFI, TLI, RMSEA and SRMR. CFI / TLI close to 1 indicated that the model fit was good, RMSEA less than 0.05 indicated that the model fit was excellent, and SRMR close to 0 indicated that the residual was small and the model could explain the data well.

[0084] S3, quantitative calculation of indirect transfer ratio:

[0085] Multiply the standardized coefficients of each extracted link to obtain the proportion of the pollutants to be assessed in the soil that are indirectly transmitted to the human body through crops and diet.

[0086] Compared with the prior art, the present invention can effectively improve the universality of the model by collecting more extensive and more representative data to cover the actual conditions of different regions and different populations; at the same time, in actual application scenarios, it is also possible to consider developing the model into a dynamic model to reflect the pollutant transfer situation that changes over time, improve the model's predictive ability, and enable it to adapt to new types of pollutants or new environmental conditions. The present invention verifies and calibrates the model through multiple indicators to improve the accuracy and reliability of the model.

[0087] It should be noted that, although the operations of the method of the present invention are described in a specific order in the above embodiments and the accompanying drawings, this does not require or imply that the operations must be performed in the specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0088] After introducing the method of the exemplary embodiment of the present invention, next, refer to Figure 4 A system for identifying the chain of transmission of soil pollutants incorporated into diet to the human body according to an exemplary embodiment of the present invention is introduced.

[0089] The implementation of the identification system of the soil pollutant transmission chain from the diet to the human body can refer to the implementation of the above method, and the repetitions will not be repeated. The terms "module" or "unit" used below can be a combination of software and / or hardware that implements a predetermined function. Although the system described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0090] Based on the same inventive concept, the present invention also proposes an identification system for the transmission chain of soil pollutants from diet to human body, such as Figure 4 As shown, the system includes:

[0091] A population data acquisition module 410 is used to screen survey subjects and acquire population biological sample data of the survey subjects;

[0092] The data collection module 420 is used to collect soil quality data, crop pollution data, and dietary detection data corresponding to the survey object.

[0093] A path equation construction module 430 is used to construct a path equation based on the soil quality data, the crop pollution data, the dietary detection data and the biological sample data of the population, wherein the soil quality data, the crop pollution data, the dietary detection data and the biological sample data of the population include the concentration of the pollutant to be evaluated and covariate data, the concentration of the pollutant to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation;

[0094] The structural equation model processing module 440 is used to introduce the path equation into the structural equation model to form a soil pollutant to human body transmission chain, and output the path coefficient according to the soil pollutant to human body transmission chain;

[0095] The transfer ratio analysis module 450 is used to quantitatively calculate the indirect transfer ratio based on the path coefficient output by the transfer chain, and determine the ratio of the pollutants to be assessed in the soil indirectly transferred to the human body through crops and dietary pathways.

[0096] It should be noted that, although several modules of the identification system of the soil contaminant transmission chain from the diet to the human body are mentioned in the above detailed description, this division is only exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more modules described above can be embodied in one module. Conversely, the features and functions of one module described above can be further divided into multiple modules to be embodied.

[0097] Based on the above invention concept, Figure 5 As shown, the present invention also proposes a computer device 500, including a memory 510, a processor 520, and a computer program 530 stored in the memory 510 and executable on the processor 520, wherein the processor 520 implements the aforementioned method for identifying the chain of transmission of soil pollutants incorporated into the diet to the human body when executing the computer program 530.

[0098] Based on the aforementioned inventive concept, the present invention proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the method for identifying the transmission chain of soil pollutants included in the diet to the human body.

[0099] Based on the aforementioned inventive concept, the present invention proposes a computer program product, which includes a computer program, and when the computer program is executed by a processor, a method for identifying the chain of transmission of soil pollutants included in the diet to the human body is implemented.

[0100] The method and system for identifying the transmission chain of soil pollutants included in the diet to the human body proposed in the present invention obtains the biological sample data of the population of the survey subjects by screening the survey subjects; for the survey subjects, the soil quality data, crop pollution data, and dietary detection data corresponding to the survey subjects are respectively collected; a path equation is constructed based on the soil quality data, crop pollution data, dietary detection data, and biological sample data of the population, wherein the soil quality data, crop pollution data, dietary detection data, and biological sample data of the population include the concentration of pollutants to be evaluated and covariate data, the concentration of pollutants to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation; the path equation is introduced into a structural equation model to form a transmission chain of soil pollutants to the human body, and the path coefficient is output according to the transmission chain of soil pollutants to the human body; according to the path coefficient output by the transmission chain, the indirect transmission ratio is quantitatively calculated to determine the ratio of the pollutants to be evaluated in the soil that are indirectly transmitted to the human body through crops and dietary pathways. The present invention innovatively considers the diet of the population and other conditions in the chain of transmission from soil to the human body, constructs individual dietary patterns based on the dietary frequency method within a set time period, uses the structural equation model to analyze the chain transmission path, and obtains the standardized coefficients of each transmission link. Ultimately, a quantitative identification technology for the pollutant chain at the soil, crop, dietary, and human levels is formed, providing strong technical support for the formulation of soil pollution control measures and standards.

[0101] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of laws and regulations.

[0102] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0103] The present invention is described with reference to flowcharts and / or block diagrams of methods and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A system that specifies the functions of a box or multiple boxes.

[0104] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction system, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0105] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0106] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for identifying the transmission chain of soil pollutants from diet to human body, characterized in that: include: Screening survey subjects and obtaining biological sample data of the survey subjects; For the survey subjects, soil quality data, crop pollution data, and dietary testing data corresponding to the survey subjects are collected respectively; Constructing a path equation according to the soil quality data, the crop pollution data, the dietary detection data and the biological sample data of the population, wherein the soil quality data, the crop pollution data, the dietary detection data and the biological sample data of the population include the concentration of the pollutant to be evaluated and covariate data, the concentration of the pollutant to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation; The path equation is introduced into the structural equation model to form a soil pollutant to human body transmission chain, and the path coefficient is output according to the soil pollutant to human body transmission chain; According to the path coefficient output by the transfer chain, the indirect transfer ratio is quantitatively calculated to determine the proportion of the pollutants to be assessed in the soil that are indirectly transferred to the human body through crops and diet.

2. The method for identifying the transmission chain of soil pollutants from diet to human body according to claim 1, characterized in that: The survey subjects at least include people who live in farming areas for a long time and engage in agricultural labor, and people who are exposed to pollutants; For the farming areas, the agricultural land in the home of the survey subject is used as a sampling point, and the farming areas corresponding to each soil pollutant with a concentration higher than the first set concentration and lower than the second set concentration are investigated to collect soil quality data; wherein the soil quality data at least includes the concentration of the pollutant to be evaluated, pH, organic matter and cation exchange capacity detected based on the soil samples in the farming areas; the concentration of the pollutant to be evaluated is the main variable, and the pH, organic matter and cation exchange capacity are covariates.

3. The method for identifying the transmission chain of soil pollutants from diet to human body according to claim 2, characterized in that: The method further includes: For crop pollution data, crops grown in agricultural areas are collected, and the concentration of pollutants to be assessed is collected from crop samples; For dietary detection data, dietary information of the survey subjects within a set time period is collected, and the dietary information at least includes food consumption status, edible oil and condiments; the consumed food is clustered according to the dietary information to obtain the dietary composition of the surveyed area or population; dietary samples are prepared according to the dietary information and dietary composition; the prepared dietary samples are homogenized, and the concentration of the pollutants to be evaluated in the dietary homogenate is detected; For biological sample data of the population, the gender, age, education level, marital status, economic status, smoking, drinking, and BMI of the respondents were collected through questionnaires; blood and urine biological samples were collected from the respondents, and the concentrations of pollutants to be evaluated in the biological samples of the respondents and the urine creatinine concentration were tested; among them, the concentrations of pollutants to be evaluated in the biological samples of the respondents were taken as the main variable, and the gender, age, education level, marital status, economic status, smoking, drinking, BMI and urine creatinine concentration of the respondents were taken as covariates.

4. The method for identifying the transmission chain of soil pollutants from diet to human body according to claim 1, characterized in that: A path equation is constructed based on the soil quality data, crop pollution data, dietary testing data and population biological sample data, including: The path equation is expressed by the following relationship: C 农作物 =β1·C 土壤 +β2·D 土壤 +∈1; C 膳食 =γ1·C 农作物 +∈2; C 人群 =δ1·C 膳食 +∈3; In the formula, C 土壤 , C 农作物 , C 膳食 , C 人群 are the concentrations of pollutants to be assessed in soil quality data, crop pollution data, dietary testing data, and population biological sample data, β1, γ1, and δ1 are standardization coefficients, and D 土壤 is the covariate corresponding to soil, β2 is the covariate coefficient corresponding to soil, ∈1, ∈2, and ∈3 are error terms respectively.

5. The method for identifying the transmission chain of soil pollutants from diet to human body according to claim 4, characterized in that: The path equation is introduced into the structural equation model to form a soil pollutant to human body transmission chain, and the path coefficient is output according to the soil pollutant to human body transmission chain, including: Statistically estimating the main variable data and covariate data in the path equation using soil quality data, crop pollution data, dietary testing data, and population biological sample data, forming a structural equation model after fitting, and using model fitting indicators to verify the fitting effect of the model; wherein the model fitting indicators at least include comparative fit index, Turkle-Lewis index, root mean square error data, and standardized root mean square residual; When the fitting effect reaches the set index, the soil pollutant to human body transmission chain is formed according to the structural equation model, and the path coefficient is output; wherein, the path coefficient for the concentration of the pollutant to be evaluated in the transmission chain is a positive number, indicating that the previous link in the path has a positive impact on the next link, and the higher the absolute value of the path coefficient, the greater the impact on the transmission chain.

6. The method for identifying the transmission chain of soil pollutants from diet to human body according to claim 5, characterized in that: According to the path coefficient output by the transmission chain, the indirect transmission ratio is quantitatively calculated to determine the ratio of the pollutants to be assessed in the soil indirectly transmitted to the human body through crops and dietary pathways, including: The path coefficients corresponding to each link in the transmission chain are multiplied to determine the proportion of the pollutants to be assessed in the soil that are indirectly transmitted to the human body through crops and diet.

7. A system for identifying the chain of transmission of soil pollutants from diet to human body, characterized in that: include: A population data acquisition module, used to screen survey subjects and obtain population biological sample data of the survey subjects; A data collection module, for collecting soil quality data, crop pollution data, and dietary detection data corresponding to the survey object; A path equation construction module, used to construct a path equation according to the soil quality data, crop pollution data, dietary detection data and population biological sample data, wherein the soil quality data, crop pollution data, dietary detection data and population biological sample data include the concentration of pollutants to be evaluated and covariate data, the concentration of pollutants to be evaluated is the main variable in the path equation, and the covariate data is the covariate in the path equation; A structural equation model processing module, used for introducing the path equation into the structural equation model to form a soil pollutant to human body transmission chain, and outputting a path coefficient according to the soil pollutant to human body transmission chain; The transfer ratio analysis module is used to quantitatively calculate the indirect transfer ratio based on the path coefficient output by the transfer chain, and determine the ratio of the pollutants to be evaluated in the soil indirectly transferred to the human body through crops and dietary pathways.

8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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