CN116399764A - Inversion method, system and equipment for extinction cross section efficiency of pollution source particulate matters - Google Patents
Inversion method, system and equipment for extinction cross section efficiency of pollution source particulate matters Download PDFInfo
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- CN116399764A CN116399764A CN202310297426.7A CN202310297426A CN116399764A CN 116399764 A CN116399764 A CN 116399764A CN 202310297426 A CN202310297426 A CN 202310297426A CN 116399764 A CN116399764 A CN 116399764A
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- 230000008033 biological extinction Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000007613 environmental effect Effects 0.000 claims abstract description 56
- 239000013626 chemical specie Substances 0.000 claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 239000013618 particulate matter Substances 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000011109 contamination Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000000149 argon plasma sintering Methods 0.000 claims description 7
- 239000003344 environmental pollutant Substances 0.000 claims description 7
- 230000031700 light absorption Effects 0.000 claims description 7
- 231100000719 pollutant Toxicity 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 239000000356 contaminant Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 description 6
- 241000894007 species Species 0.000 description 4
- 241001274197 Scatophagus argus Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/30—Prediction of properties of chemical compounds, compositions or mixtures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a pollution source particulate matter extinction cross section efficiency inversion method, system and equipment, and relates to the field of environment detection, wherein the method comprises the following steps: acquiring environmental parameters in the space range to be detected; the environmental parameters include optical parameters and concentrations of chemical species; determining uncertainty of each environmental parameter; inputting each of the environmental parameters and the uncertainty of each of the environmental parameters into a PMF source analytical model to obtain a source spectrogram, wherein the source spectrogram comprises a plurality of factors, each factor comprises a plurality of factors, and each factor comprises a chemical species and an optical parameter; determining pollution sources corresponding to the factors according to the concentration of each chemical species in the factors and the optical parameters; and inverting the extinction section efficiency of the particulate matters of each pollution source according to the concentration and the optical parameters of each chemical species corresponding to each pollution source. The difficulty in determining the extinction cross-section efficiency of each pollution source particulate matter is reduced.
Description
Technical Field
The invention relates to the technical field of environmental monitoring, in particular to a method, a system and equipment for inverting extinction section efficiency of pollutant source particulate matters.
Background
Aerosols are an important component of the earth's atmosphere, and have profound effects on climate, air quality, ecosystem and human health, one of the important causes of air pollution. Wherein fine Particulate Matter (PM) 2.5 ) Can scatter and absorb solar short wave radiation, thereby seriously affecting the atmospheric visibility, and the past researches only know the contribution of chemical components of particles to extinction, it is difficult to convert it into an effective environmental remediation means and it is therefore necessary to directly relate it to the extinction contribution of the source of pollution in order to better support improved visibility.
The current calculation method of extinction section efficiency (Mass extinction efficiency, MEE) mainly carries out sampling monitoring at each specific pollution source and observes PM of each pollution source 2.5 Is used for the concentration and optical parameters of the light source, and further calculate the extinction cross-section efficiency for each source of contamination. The disadvantage of this method is that the source sampling work needs to be performed for each pollution source, and the process is cumbersome.
Disclosure of Invention
The invention aims to provide a method, a system and equipment for inverting extinction section efficiency of pollutant source particles, which reduce difficulty in determining extinction section efficiency of each pollutant source particle.
In order to achieve the above object, the present invention provides the following solutions:
an inversion method of extinction cross-section efficiency of pollution source particulate matter, comprising the following steps:
acquiring environmental parameters in the space range to be detected; the environmental parameters include optical parameters and concentrations of chemical species;
determining uncertainty of each environmental parameter;
inputting the environmental parameters and the uncertainty of the environmental parameters into a PMF source analysis model to obtain a source spectrogram, wherein the source spectrogram comprises a plurality of factors, each factor comprises a plurality of factors, and each factor is a chemical species or an optical parameter;
determining pollution sources corresponding to the factors according to the concentration of each chemical species in the factors and the optical parameters;
and inverting the extinction section efficiency of the particulate matters of each pollution source according to the concentration and the optical parameters of each chemical species corresponding to each pollution source.
The optical parameters include a light scattering coefficient and a light absorption coefficient.
Optionally, the chemical species includes a carbonaceous component and an inorganic element.
Optionally, the determining the uncertainty of each environmental parameter specifically includes:
when the concentration of the environmental parameter is greater than or equal to the preset minimum detection limit, according to the formula
Calculating uncertainty of the environmental parameter;
when the concentration of the environmental parameter is less than the preset minimum detection limit, according to the formula
Calculating uncertainty of the environmental parameter;
wherein Unc represents uncertainty, errorFraction is error rate, concentration is Concentration of the environmental parameter, and MDL is preset minimum detection limit.
Optionally, inverting the extinction section efficiency of the particulate matters of each pollution source according to the concentration and the optical parameters of each chemical species corresponding to each pollution source specifically comprises the following steps:
according to the formula mee=b ext /[PM 2.5 ]Calculating extinction cross-section efficiency of one of the pollution sources;
wherein MEE represents the extinction cross-sectional efficiency of the contamination source, b ext Representing an extinction coefficient corresponding to the source of contamination, the extinction coefficient being the sum of the light scattering coefficient and the light absorption coefficient, [ PM ] 2.5 ]Representing the sum of the concentrations of the respective chemical species corresponding to the source of pollution.
The invention also discloses an inversion system of extinction section efficiency of pollution source particulate matters, which comprises the following steps:
the environment parameter acquisition module is used for acquiring environment parameters in the space range to be detected; the environmental parameters include optical parameters and concentrations of chemical species;
an uncertainty determination module of the environmental parameters, which is used for determining the uncertainty of each environmental parameter;
the source spectrogram obtaining module is used for inputting the environmental parameters and the uncertainty of the environmental parameters into the PMF source analysis model to obtain a source spectrogram, wherein the source spectrogram comprises a plurality of factors, each factor comprises a plurality of factors, and each factor is a chemical species or an optical parameter;
the pollution source determining module is used for determining pollution sources corresponding to the factors according to the concentration and the optical parameters of the chemical species in the factors;
and the extinction section efficiency determining module is used for inverting the extinction section efficiency of each pollution source particle according to the concentration and the optical parameters of each chemical species corresponding to each pollution source.
The invention also discloses an electronic device, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic device to execute the inversion method of the extinction cross section efficiency of the pollution source particulate matters.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the invention, the source spectrogram is obtained through the PMF source analysis model, each pollution source is determined according to the source spectrogram, so that the extinction cross section efficiency of each pollution source is determined, each pollution source is prevented from being subjected to source sampling, and the difficulty in determining the extinction cross section efficiency of each pollution source particulate matter is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of an inversion method of extinction cross-section efficiency of pollutant source particulate matter;
FIG. 2 is a schematic diagram of an inversion method of extinction cross-section efficiency of contaminant source particulate matter according to the present invention;
FIG. 3 is a schematic diagram of an inversion system for extinction cross-section efficiency of contaminant source particulate matter according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a method, a system and equipment for inverting extinction section efficiency of pollutant source particles, which reduce difficulty in determining extinction section efficiency of each pollutant source particle.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in FIG. 1, the inversion method of the extinction section efficiency of the pollution source particulate matter comprises the following steps:
step 101: acquiring environmental parameters in the space range to be detected; the environmental parameters include optical parameters and concentrations of chemical species.
The optical parameter includes a light scattering coefficient b scat And light absorption coefficient b abs 。
The chemical species include carbonaceous components and inorganic elements.
Step 102: and determining uncertainty of each environmental parameter.
The determining the uncertainty of each environmental parameter specifically comprises the following steps:
when the concentration of the environmental parameter is greater than or equal to the preset minimum detection limit, according to the formula
And calculating uncertainty of the environmental parameter.
When the concentration of the environmental parameter is less than the preset minimum detection limit, according to the formula
And calculating uncertainty of the environmental parameter.
Wherein Unc represents uncertainty, error Fraction is Error rate, concentration is Concentration of the environmental parameter, and MDL is preset minimum detection limit. The setting range of the Error Fraction is 5% -20%.
The principle of the inversion method of the extinction cross-section efficiency of the pollution source particulate matters is shown in figure 2. In FIG. 2, the chemical components are chemical species, and the optical parameters include the light scattering coefficient b scat Light absorption coefficient b abs And the sum extinction coefficient b of the two ext PMF represents a PMF source analytical model.
Step 103: inputting each environmental parameter and uncertainty of each environmental parameter into a PMF source analysis model to obtain a source spectrogram, wherein the source spectrogram comprises a plurality of factors, each factor comprises a plurality of factors, and each factor is a chemical species or an optical parameter.
Each factor pair PM 2.5 The contribution rate of the concentration can be obtained in a source spectrogram.
The PMF source analysis model principle is to decompose a sample data matrix X into a factor component spectrum matrix F and a factor contribution matrix G, and the formula is as follows:
wherein x is ij For elements in the sample data matrix X, f ki G is the factor of the factor component spectrum matrix F ik Contributing the factors of the matrix G to x ij Represents the concentration of the jth species in the ith sample, P is the number of factors, g ik Representing the factor contribution of the kth factor to the ith sample, f kj Is the factor distribution of the jth species over the kth factor, e ij Is the residual of the jth species measured on the ith sample.
The PMF source analytical model is based on input concentration and uncertainty (u ij ) The minimum solution of the objective function Q is sought to obtain information of the factor spectrum and factor contribution, the formula of which is:
wherein n represents the number of samples and m represents the number of species
Step 104: and determining a pollution source corresponding to each factor according to the concentration of each chemical species in each factor and the optical parameter.
The content of each pollution source tracer is used to determine which pollution source the factor represents.
The concentration ranges of the elements corresponding to the pollution sources are stored in advance, and the pollution sources corresponding to the factors are determined according to the relation among the concentration ranges of the elements corresponding to the pollution sources stored in advance.
For example, when K + And Cl - When the content is higher than the corresponding set value, the factor is considered to be caused by biomass combustion, namely the pollution source corresponding to the factor is biomass combustion.
Step 105: and inverting the extinction section efficiency of the particulate matters of each pollution source according to the concentration of each chemical species and optical parameters corresponding to each pollution source.
Step 105 specifically includes:
according to the formula mee=b ext /[PM 2.5 ]The extinction cross-section efficiency of one of the sources of contamination is calculated.
Wherein MEE represents the extinction cross-sectional efficiency of the contamination source, b ext Representing the extinction coefficient, i.e. the light scattering coefficient b, corresponding to the source of contamination scat And light absorption coefficient b abs Sum, [ PM ] 2.5 ]Representing the sum of the concentrations of the respective chemical species corresponding to the source of pollution.
Example 2
FIG. 3 is a schematic structural diagram of an inversion system for extinction cross-section efficiency of particulate matter of a pollution source according to the present invention, as shown in FIG. 3, the inversion system for extinction cross-section efficiency of particulate matter of a pollution source includes:
an environmental parameter obtaining module 201, configured to obtain environmental parameters within a space range to be detected; the environmental parameters include optical parameters and concentrations of chemical species.
An uncertainty determination module 202 for determining uncertainty of each of the environmental parameters.
The source spectrogram obtaining module 203 is configured to input each of the environmental parameters and uncertainty of each of the environmental parameters into a PMF source analytical model to obtain a source spectrogram, where the source spectrogram includes a plurality of factors, each factor includes a plurality of elements, and each element is a chemical species or an optical parameter.
The pollution source determining module 204 is configured to determine a pollution source corresponding to each factor according to the concentration of each chemical species in each factor and the optical parameter.
And the extinction section efficiency determining module 205 is configured to invert the extinction section efficiency of each pollution source particulate matter according to the concentration and the optical parameters of each chemical species corresponding to each pollution source.
Example 3
The embodiment discloses an electronic device, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic device to execute the inversion method of the extinction cross-section efficiency of pollution source particles in embodiment 1.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. An inversion method of extinction cross-section efficiency of pollutant source particulate matter is characterized by comprising the following steps:
acquiring environmental parameters in the space range to be detected; the environmental parameters include optical parameters and concentrations of chemical species;
determining uncertainty of each environmental parameter;
inputting the environmental parameters and the uncertainty of the environmental parameters into a PMF source analysis model to obtain a source spectrogram, wherein the source spectrogram comprises a plurality of factors, each factor comprises a plurality of factors, and each factor is a chemical species or an optical parameter;
determining pollution sources corresponding to the factors according to the concentration of each chemical species in the factors and the optical parameters;
and inverting the extinction section efficiency of the particulate matters of each pollution source according to the concentration and the optical parameters of each chemical species corresponding to each pollution source.
2. The method of inverting the extinction cross-sectional efficiency of a contaminant source particulate matter according to claim 1, wherein said optical parameters include a light scattering coefficient and a light absorption coefficient.
3. A method of inverting the extinction cross-sectional efficiency of a contaminant source particulate matter according to claim 1, wherein said chemical species comprises a carbonaceous component and an inorganic element.
4. The method for inverting the extinction cross-section efficiency of particulate matter of a pollution source according to claim 1, wherein said determining uncertainty of each of said environmental parameters comprises:
when the concentration of the environmental parameter is greater than or equal to the preset minimum detection limit, according to the formula
Calculating uncertainty of the environmental parameter;
when the concentration of the environmental parameter is less than the preset minimum detection limit, according to the formula
Calculating uncertainty of the environmental parameter;
wherein Unc represents uncertainty, errorFraction is error rate, concentration is Concentration of the environmental parameter, and MDL is preset minimum detection limit.
5. The method for inverting the extinction cross-section efficiency of the particulate matter of the pollution sources according to claim 2, wherein the inverting the extinction cross-section efficiency of the particulate matter of each pollution source according to the concentration and the optical parameters of each chemical species corresponding to each pollution source specifically comprises:
according to the formula mee=b ext /[PM 2.5 ]Calculating extinction cross-section efficiency of one of the pollution sources;
wherein MEE represents the extinction cross-sectional efficiency of the contamination source, b ext Representing an extinction coefficient corresponding to the source of contamination, the extinction coefficient being the sum of the light scattering coefficient and the light absorption coefficient, [ PM ] 2.5 ]Representing the sum of the concentrations of the respective chemical species corresponding to the source of pollution.
6. An inversion system for extinction cross-section efficiency of a contaminant source particulate, comprising:
the environment parameter acquisition module is used for acquiring environment parameters in the space range to be detected; the environmental parameters include optical parameters and concentrations of chemical species;
an uncertainty determination module of the environmental parameters, which is used for determining the uncertainty of each environmental parameter;
the source spectrogram obtaining module is used for inputting the environmental parameters and the uncertainty of the environmental parameters into the PMF source analysis model to obtain a source spectrogram, wherein the source spectrogram comprises a plurality of factors, each factor comprises a plurality of factors, and each factor is a chemical species or an optical parameter;
the pollution source determining module is used for determining pollution sources corresponding to the factors according to the concentration and the optical parameters of the chemical species in the factors;
and the extinction section efficiency determining module is used for inverting the extinction section efficiency of each pollution source particle according to the concentration and the optical parameters of each chemical species corresponding to each pollution source.
7. An electronic device comprising a memory for storing a computer program and a processor that runs the computer program to cause the electronic device to perform the method according to any one of claims 1 to 5.
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