CN116959628A - Method and device for analyzing substance components in whole cell culture process - Google Patents

Method and device for analyzing substance components in whole cell culture process Download PDF

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CN116959628A
CN116959628A CN202310912458.3A CN202310912458A CN116959628A CN 116959628 A CN116959628 A CN 116959628A CN 202310912458 A CN202310912458 A CN 202310912458A CN 116959628 A CN116959628 A CN 116959628A
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matrix
component
concentration
spectrum
spectrum matrix
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卢卫东
查波风
杨晓峰
梁朗
王成
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Anjiyi Industrial Shanghai Co ltd
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    • G16INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16CCOMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
    • G16C20/00Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65Raman scattering
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    • G06F18/21Design or setup of recognition systems or techniques; Extraction of features in feature space; Blind source separation
    • G06F18/213Feature extraction, e.g. by transforming the feature space; Summarisation; Mappings, e.g. subspace methods
    • G06F18/2135Feature extraction, e.g. by transforming the feature space; Summarisation; Mappings, e.g. subspace methods based on approximation criteria, e.g. principal component analysis
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00Pattern recognition
    • G06F18/20Analysing
    • G06F18/27Regression, e.g. linear or logistic regression
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    • G16INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16CCOMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
    • G16C20/00Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
    • G16C20/30Prediction of properties of chemical compounds, compositions or mixtures

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Abstract

The invention relates to a substance component analysis method and a device for the whole cell culture process, wherein the method comprises the following steps: pre-training to obtain a concentration regression model; an acquisition step of acquiring a plurality of Raman spectrums in real time for a culture solution in fermentation so as to obtain an original spectrum matrix; analyzing to obtain a main component matrix; an extraction step, namely performing feature extraction on the main component matrix to obtain a concentration spectrum matrix and a component spectrum matrix; a correlation step of obtaining an optimal component spectrum matrix of a plurality of target substances; comparing the optimal component spectrum matrixes of the target substances, and obtaining an actual spectrum matrix according to the concentration spectrum matrix and the component spectrum matrix; and a prediction step, carrying out concentration regression prediction according to the actual spectrum matrix and the concentration regression model to obtain a predicted concentration matrix. According to the invention, the technical problem that the substance components cannot be analyzed correctly is solved, and the stability and accuracy of the substance component analysis are improved.

Description

Method and device for analyzing substance components in whole cell culture process
Technical Field
The invention relates to the field of substance analysis, in particular to a substance component analysis method and a device for the whole cell culture process.
Background
During cell culture, a constant concern over the content of various substances within the tank is extremely important for the growth of microorganisms and the formation of products. The usual method is to use various detectors, off-line sampling analysis, etc., and there are also methods using raman spectroscopy for on-line analysis. In the conventional raman spectrum analysis method, after spectrum acquisition, pretreatment is performed through baseline calibration, normalization and the like, and concentration regression is performed to obtain a corresponding substance concentration value.
In the actual biological fermentation process, the substances are not clear, namely the types and the amounts of the source substances are not clear, namely the raman peak intensities of part of the substances are not obvious, so that after concentration regression is directly performed by the prior art, an accurate concentration value matrix cannot be derived, and the components of the substances cannot be analyzed correctly.
It can be seen that the provision of an improved method and apparatus for analyzing the composition of matter for the whole cell culture process, based on the shortcomings of the prior art, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
Problems to be solved by the invention
The object of the present invention is to overcome the drawbacks of the prior art and to provide an improved method and device for analysing the composition of matter for the whole process of cell culture. According to the improved substance component analysis method and device provided by the invention, the technical problem that the substance component cannot be accurately analyzed is solved, and the stability and accuracy of the substance component analysis are improved.
Means for solving the problems
The first aspect of the present invention relates to a method for analyzing a substance component for a whole cell culture process, comprising the steps of:
a pre-training step, namely respectively carrying out spectrum acquisition on a plurality of target substances in a microorganism-free environment to obtain a multidimensional matrix, and recording concentration matrixes of the plurality of target substances to obtain a concentration regression model;
an acquisition step of acquiring a plurality of Raman spectrums in real time for a culture solution in fermentation so as to obtain an original spectrum matrix;
an analysis step of performing ICA on the original spectrum matrix, and substituting a plurality of main components respectively to obtain a main component matrix;
an extraction step, namely performing feature extraction on the main component matrix to obtain a concentration spectrum matrix and a component spectrum matrix;
a correlation step of performing correlation analysis on the component spectrum matrix and the multidimensional matrix, thereby obtaining an optimal component spectrum matrix of a plurality of target substances;
comparing the optimal component spectrum matrixes of the target substances, and obtaining an actual spectrum matrix according to the concentration spectrum matrix and the component spectrum matrix;
and a prediction step, carrying out concentration regression prediction according to the actual spectrum matrix and the concentration regression model to obtain a predicted concentration matrix.
Preferably, in the pre-training step, the multidimensional matrix is obtained in a linear correction manner.
Preferably, in the pre-training step, a concentration regression model is obtained in PLS-R mode.
Preferably, in the extracting step, the concentration spectrum matrix and the component spectrum matrix are obtained by a multivariate curve resolution and an alternating least squares method.
Preferably, in the comparing step, the comparison is performed by means of MSE.
The second aspect of the present invention relates to a substance component analysis apparatus for use in a whole cell culture process, the substance component analysis apparatus for performing a substance component analysis by the substance component analysis method of the first aspect of the present invention, the apparatus comprising:
the operation module is used for carrying out various operations in the analysis of the material components;
the communication module is connected with the operation module and used for communicating with the outside;
the storage module is connected with the operation module and used for storing the operated data;
the IO module is connected with the operation module and is used for receiving the input of a user and outputting an operation result;
and the display module is connected with the operation module and used for displaying the operation conditions and process.
Preferably, the operation module performs parallel processing using the GPU.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the improved substance component analysis method and device provided by the invention, the technical problem that the substance component cannot be accurately analyzed is solved, and the stability and accuracy of the substance component analysis are improved.
Drawings
Fig. 1 is a flowchart of a method for analyzing a substance component according to a first embodiment of the present invention.
Fig. 2 is a spectrum corresponding to the original spectrum matrix in the analysis method of fig. 1.
Fig. 3 is a pseudo-inverse spectrum corresponding to the principal component matrix in the analysis method of fig. 1.
Fig. 4 is a spectrum corresponding to the concentration spectrum matrix in the analysis method of fig. 1.
FIG. 5 is a spectrum corresponding to the component spectrum matrix in the analysis method of FIG. 1.
Fig. 6 is a spectrum corresponding to the actual spectrum matrix in the analysis method of fig. 1.
Fig. 7 is a schematic view of a substance component analysis device according to a second embodiment of the present invention.
Detailed Description
The method and apparatus for analyzing a substance component used in the whole cell culture process according to the present invention will be described in detail below.
Fig. 1 is a flowchart of a method for analyzing a substance component according to a first embodiment of the present invention. As shown in fig. 1, the method includes: a pre-training step 101, an acquisition step 102, an analysis step 103, an extraction step 104, a correlation step 105, a comparison step 106, a prediction step 107.
Specifically, in the pre-training step 101, spectrum acquisition is performed on a plurality of target substances in a microorganism-free environment to obtain a relatively pure single standard spectrum and a spectrum in which a plurality of equivalent substances are alternately mixed, the spectra are superimposed and recorded as a multi-dimensional matrix [ Xp ], and a concentration matrix of the plurality of target substances is recorded to obtain a concentration regression model Mp.
The target substance may be selected according to the object of analysis, and may be, for example, glucose, lactose, acetic acid, glutamine, lactic acid, living cells, or the like.
Preferably, the multidimensional matrix [ Xp ] is obtained in a linear correction manner. The linear correction method may be, for example, baseline correction, savitzky-Golay filtering, or the like.
Preferably, the concentration regression model Mp is obtained in the manner of PLS-R (partial least squares regression).
Fig. 2 is a spectrum corresponding to the original spectrum matrix in the analysis method of fig. 1. In FIG. 2, the abscissa represents Raman shift in wavenumber (cm -1 ) The ordinate indicates the raman intensity in relative intensity (a.u). In the collection step 102, the culture solution in the tank is uniformly mixed under the action of the stirring paddle, a plurality of Raman spectrums are collected in real time, and after pretreatment, an original spectrum matrix [ S ] which is corresponding to FIG. 2 and eliminates noise in the fermentation process is obtained]。
Fig. 3 is a pseudo-inverse spectrum corresponding to the principal component matrix in the analysis method of fig. 1. In FIG. 3, the abscissa represents Raman shift in wavenumber (cm -1 ) The ordinate represents the value of the pseudo-inverse matrix after ICA extraction, and the value has no units. In the analysis step 103, ICA is performed on the original spectrum matrix, and a plurality of principal components are substituted into each of the spectrum matrix to obtain a principal component matrix. In this case, the number of principal components is set to n, and n may be a natural number of 3 or more and 30 or less, for example, and the principal components are substituted for the following to perform cyclic calculation. Matrix the original spectrum S]ICA (independent principal component analysis) is performed, and the principal components are substituted to obtain principal component matrix [ Si ]]The inside contains the spectral information of n principal components.
The specific ICA method is to increase a unmixed matrix [ W ], define si=w×s, establish an independent distribution function according to the property of independent distribution of the main component, and then popularize the independent distribution function into a joint distribution function, wherein W is a joint distribution parameter, and the unmixed matrix [ W ] can be calculated through maximum likelihood estimation, so as to calculate the main component matrix [ Si ].
Fig. 4 is a spectrum corresponding to the concentration spectrum matrix in the analysis method of fig. 1, and fig. 5 is a spectrum corresponding to the component spectrum matrix in the analysis method of fig. 1. In fig. 4, the abscissa represents the component spectral measurement value corresponding to the concentration spectral matrix, the value has no unit, and the ordinate represents the raman intensity in relative intensity (a.u). In FIG. 5, the abscissa represents Raman shift in wavenumber (cm -1 ) The ordinate indicates the component spectral metric values, the values being unitless. In the extraction step 104, since the superposition of spectral components follows a linear relationship, the equation is set:
S=K*St T +E,
wherein S is an original spectrum matrix [ S ], K is a concentration component of a main component matrix [ Si ], st is a component of the main component matrix [ Si ], E is a difference value between the original spectrum matrix [ S ] and the main component matrix [ Si ], namely a substrate spectrum, and the concentration spectrum matrix [ K ] and the component spectrum matrix [ St ] are obtained through calculation according to the formula.
Preferably, by a multi-curve resolution and alternating least square method, non-negative least square and L2 regularization are adopted as linear regression constraint, the optimal convergence term is calculated by iterative placement in a formula, and a concentration spectrum matrix [ K ] and a component spectrum matrix [ St ] in a real-time spectrum are obtained.
In a correlation step 105, the component spectrum matrix [ St ] is subjected to correlation analysis with the multidimensional matrix [ Xp ] to extract an optimal component spectrum matrix [ Sr ] of the target substance in the component spectrum.
Fig. 6 is a spectrum corresponding to the actual spectrum matrix in the analysis method of fig. 1. In FIG. 6, the abscissa represents Raman shift in wavenumber (cm -1 ) The ordinate indicates the raman intensity in relative intensity (a.u). In a comparison step 106, the pairComparing the results of the principal components, for example, by comparing the correlation, etc., to obtain the optimal principal component decomposition, and passing the concentration spectrum matrix [ K ] for the optimal solution set of this reasoning]And an optimal component spectral matrix [ Sr]The actual spectrum matrix [ XIN ] of the target substance with optimal matching can be obtained]。
Preferably, the comparison is made by means of MSE (MeanSquaredError).
In the prediction step 107, concentration regression prediction is performed on the actual spectrum matrix [ XIN ] by the concentration regression model Mp to obtain a predicted concentration matrix value. The final concentration matrix value is the predicted concentration of the target substance.
As described above, the first embodiment uses a blind source separation method and a PLS-R regression method to calculate the concentration. In the method, the influence problem of unknown components is solved by circularly setting the main component of ICA to obtain the optimal component spectrum, and the problem that component analysis cannot be accurately performed under the condition that the Raman peak intensity of a substance is not obvious is solved by separating out the spectrum and removing the substrate spectrum. Meanwhile, the method can also improve the stability and accuracy of detection, and when a traditional analysis method is used, MAPE (mean absolute percentage error) is 0-0.98, and after the method of the first embodiment of the invention is adopted, MAPE is greatly reduced to 0-0.14, so that the accuracy and robustness of an analysis flow are improved.
Therefore, according to the method for analyzing the substance component in the first embodiment of the invention, the technical problem that the substance component cannot be accurately analyzed is solved, and the stability and the accuracy of the analysis of the substance component are improved.
The second aspect of the present invention relates to a substance component analysis apparatus for performing substance component analysis by the substance component analysis method of the first aspect of the present invention. As shown in fig. 7, the apparatus includes: the operation module is used for carrying out various operations in the analysis of the material components; the communication module is connected with the operation module and used for communicating with the outside; the storage module is connected with the operation module and used for storing the operated data; the IO module is connected with the operation module and is used for receiving the input of a user and outputting an operation result; and the display module is connected with the operation module and used for displaying the operation conditions and process.
Specifically, the operation module may perform parallel operation on a plurality of matrix iterative operations in the substance component analysis method according to the first aspect of the present invention, such as a matrix iterative regression process of multivariate curve analysis. The operation module may be a parallel processing logic board card, such as a GPU operation card or an FPGA core card, and together with the communication module, the storage module, the IO module, and the display module, form a substance component analysis device for the whole cell culture process, where the analysis device may interact with a user through a key of the IO module.
The multi-element curve analysis process of the material component analysis method involves a large number of matrix multiplication and least square iteration, and the multi-element curve analysis operation process can be implanted into the GPU of the GPU operation card for operation, so that the matrix multiplication process is processed in parallel, and a large number of multi-element curve analysis operation time is saved by fully utilizing the parallel processing capability of the GPU.
As described above, according to the second embodiment, by using the substance component analysis device which is configured to be compatible with the first embodiment, the processing speed is greatly improved as compared with the substance component analysis technique in the related art, and thus, real-time analysis can be realized. It has been calculated that the calculation time for mass spectrometry is about 5s when the conventional analyzer is applied, whereas the calculation time for mass spectrometry is significantly reduced to about 500ms when the analyzer of the present invention is applied.
Therefore, according to the substance component analysis device of the second embodiment of the invention, the technical problem that the substance component cannot be accurately analyzed is solved, and the stability and accuracy of the substance component analysis are improved.
Industrial applicability
According to the method and the device for analyzing the substance components, the technical problem that the substance components cannot be accurately analyzed is solved, and the stability and the accuracy of the substance component analysis are improved.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (7)

1. A method for analyzing a substance component in a whole cell culture process, comprising the steps of:
a pre-training step, namely respectively carrying out spectrum acquisition on a plurality of target substances in a microorganism-free environment to obtain a multidimensional matrix, and recording concentration matrixes of the plurality of target substances to obtain a concentration regression model;
an acquisition step of acquiring a plurality of Raman spectrums in real time for a culture solution in fermentation so as to obtain an original spectrum matrix;
an analysis step of performing ICA on the original spectrum matrix, and substituting a plurality of main components respectively to obtain a main component matrix;
an extraction step, namely performing feature extraction on the main component matrix to obtain a concentration spectrum matrix and a component spectrum matrix;
a correlation step of performing correlation analysis on the component spectrum matrix and the multidimensional matrix, thereby obtaining an optimal component spectrum matrix of a plurality of target substances;
comparing the optimal component spectrum matrixes of the target substances, and obtaining an actual spectrum matrix according to the concentration spectrum matrix and the component spectrum matrix;
and a prediction step, carrying out concentration regression prediction according to the actual spectrum matrix and the concentration regression model to obtain a predicted concentration matrix.
2. The method for analyzing a substance component as defined in claim 1, wherein,
in the pre-training step, a multi-dimensional matrix is obtained in a linear correction manner.
3. The method for analyzing a substance component as defined in claim 1, wherein,
in the pre-training step, a concentration regression model is obtained in the PLS-R mode.
4. The method for analyzing a substance component as defined in claim 1, wherein,
in the extraction step, a concentration spectrum matrix and a component spectrum matrix are obtained through multi-curve resolution and an alternate least square method.
5. The method for analyzing a substance component as defined in claim 1, wherein,
in the comparison step, the comparison is performed by means of MSE.
6. A substance component analysis apparatus for use in a whole cell culture process, characterized by performing a substance component analysis by the substance component analysis method according to any one of claims 1 to 5, the apparatus comprising:
the operation module is used for carrying out various operations in the analysis of the material components;
the communication module is connected with the operation module and used for communicating with the outside;
the storage module is connected with the operation module and used for storing the operated data;
the IO module is connected with the operation module and is used for receiving the input of a user and outputting an operation result;
and the display module is connected with the operation module and used for displaying the operation conditions and process.
7. The device for analyzing a substance component as defined in claim 6, wherein,
the operation module performs parallel processing by using the GPU.
CN202310912458.3A 2023-07-25 2023-07-25 Method and device for analyzing substance components in whole cell culture process Pending CN116959628A (en)

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CN108802000A (en) * 2018-03-16 2018-11-13 上海交通大学 A kind of lossless quick cholecalciferol-cholesterol content quantitative method based on the full spectrum analysis of Raman
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CN113030012A (en) * 2021-04-02 2021-06-25 山东大学 Spectrum analysis method and system based on multistage partial least square algorithm
CN113919141A (en) * 2021-09-22 2022-01-11 中国矿业大学 Coal mine area storage yard soil heavy metal risk management and control system and migration inversion method
CN114611582A (en) * 2022-02-16 2022-06-10 温州大学 Method and system for analyzing substance concentration based on near infrared spectrum technology

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101458214A (en) * 2008-12-15 2009-06-17 浙江大学 Organic polymer solution concentration detecting method
CN103175806A (en) * 2013-03-14 2013-06-26 公安部天津消防研究所 Method for detecting moisture content of dry powder extinguishing agents based on near infrared spectroscopy analysis
CN104165861A (en) * 2014-08-22 2014-11-26 云南中烟工业有限责任公司 Near infrared spectrum quantitative model simplification method based on principal component analysis
CN108802000A (en) * 2018-03-16 2018-11-13 上海交通大学 A kind of lossless quick cholecalciferol-cholesterol content quantitative method based on the full spectrum analysis of Raman
CN110186851A (en) * 2019-05-27 2019-08-30 生态环境部南京环境科学研究所 It is a kind of based on the semi-supervised Hyperspectral imaging heavy metal-polluted soil concentration evaluation method from Coded Analysis
CN110726694A (en) * 2019-10-22 2020-01-24 常州大学 Characteristic wavelength selection method and system of spectral variable gradient integrated genetic algorithm
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