CN112101817B - Evaluation method for homogenization degree of finished cured tobacco products processed in batches - Google Patents
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Abstract
The invention discloses an evaluation method for the homogenization degree of finished cured tobacco products processed in batches, which comprises the following steps: collecting tobacco samples of all the tobacco finished product grades in the batch processing process, determining homogenization evaluation indexes of the tobacco finished products, constructing a coincidence degree function model to determine coincidence degree of all the evaluation indexes, determining weight of all the evaluation indexes, calculating comprehensive values and ranks of the homogenization evaluation coincidence degree, averaging to obtain homogenization evaluation scores of all the tobacco finished products after multiple times of combination, and finally determining a final evaluation result according to the grade number of the tobacco finished products in the batch processing and the homogenization evaluation scores of all the grades. The evaluation method disclosed by the invention has the advantages that the data are easy to obtain, the operation is simple, on the basis of considering index preference and reducing the weighted randomness, the homogenization evaluation score of each flue-cured tobacco finished product grade is obtained after the combination for a plurality of times, and the transverse connection is established with the grade number of the batch of processed finished products, so that the accuracy and the scientificity of the evaluation result are ensured, and the method is convenient to popularize and apply in the batch flue-cured tobacco processing process.
Description
Technical Field
The invention relates to the field of flue-cured tobacco manufacturing and processing, in particular to an evaluation method for the homogenization degree of finished products of batch-processed flue-cured tobacco.
Background
The high-quality flue-cured tobacco raw material is a foundation for supporting the development of tobacco in China, especially Chinese-style cigarettes, and in recent years, the central task of 'the upper level of raw material guarantee' in the industry is kept on the premise of meeting the process requirements of Chinese-style cigarettes as the core, and the 'three-in-one' requirement is provided for the threshing and redrying process. The raw material supply is not simply remained in the agricultural stages of variety breeding, agronomic cultivation, primary raw material baking and the like. The control of two key indexes of nicotine and water uniformity in finished products, and the deep realization of redrying processing homogenization has attracted great attention in the whole industry.
Product homogenization refers to the tendency of consistent quality from batch to batch or from section to section of the same batch of product. The homogenization of the finished tobacco flakes involves a plurality of factors such as raw materials, formula, threshing and redrying process, mixing uniformity of the tobacco flakes in the processing process, and the like. Most of researches are conducted to examine the changes of main chemical components and sensory quality in the aging process of cured tobacco products or to discuss the influence of the blending proportion of tobacco leaves on the homogeneity of the tobacco leaves in the threshing and redrying process. The evaluation and research of the homogenization degree of the finished cured tobacco products processed in batches is reported recently, a system for comprehensively quantitatively evaluating the homogenization degree of the finished cured tobacco products is lacking, a calculation method capable of rapidly evaluating the homogenization level of the finished cured tobacco products processed in batches is urgently needed, and technical support and theoretical support are provided for improving and enhancing the threshing and redrying quality of the cured tobacco and maintaining the quality stability of Chinese cigarettes.
Disclosure of Invention
The invention aims to provide an evaluation method for the homogenization degree of a finished batch processed flue-cured tobacco product, which is a system for comprehensively and rapidly evaluating the homogenization degree of the finished batch processed flue-cured tobacco product.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an evaluation method for the homogenization degree of finished cured tobacco products processed in batches comprises the following steps:
s1: collecting tobacco flake samples of the tobacco finished product grades produced in each batch, and determining the data value of the homogenization evaluation index of the tobacco finished product grades in each batch through detection or calculation;
s2: constructing a coincidence function model, and determining a coincidence score of the homogenization evaluation index of the flue-cured tobacco finished product grade of each batch;
s3: determining the weight of each homogenization evaluation index by adopting a weighting method, wherein the weighting method comprises a subjective weighting method, an objective weighting method and a comprehensive weighting method;
s4: determining the comprehensive grading value of the uniformity evaluation conformity of each batch of single-grade flue-cured tobacco finished products according to the conformity scores of the uniformity evaluation indexes of each batch of flue-cured tobacco finished products in the step S2 and the weights of the uniformity evaluation indexes in the step S3, wherein the ranking of the flue-cured tobacco finished products in all grades of each batch is corresponding to the conformity comprehensive grading value;
s5: determining the homogenization evaluation score of each batch of single-grade flue-cured tobacco finished products according to the comprehensive score value and the ranking of the homogenization evaluation conformity of each batch of single-grade flue-cured tobacco finished products in the step S4;
s6: determining a homogenization evaluation result of each batch of finished flue-cured tobacco products according to the grade number of each batch of finished flue-cured tobacco products and the homogenization evaluation score of each batch of single-grade finished flue-cured tobacco products in the step S5;
s7: and (3) evaluating the homogenization processing degree of each batch of flue-cured tobacco according to the homogenization evaluation result of each batch of flue-cured tobacco finished products obtained in the step (S6), and determining the batch processing technology which is preferentially selected in the flue-cured tobacco threshing and redrying process.
In order to accurately evaluate the homogenization processing degree of each batch of flue-cured tobacco finished products, the invention determines the coincidence function of the homogenization evaluation index and determines the coincidence score of the homogenization evaluation index; the flue-cured tobacco finished product collected by the method covers all grades in each production batch, ensures the diversity of sample collection, and ensures the wide applicability of the evaluation method. The invention adopts weight combination and homogenization evaluation result combination to obtain the uniform homogenization evaluation result of the single-grade flue-cured tobacco finished product; the homogenization degree of the batch processing flue-cured tobacco process is analyzed and evaluated more systematically and comprehensively by comprehensively considering the grade quality and the quantity information of the finished products of each batch processing flue-cured tobacco, so that the objectivity and the accuracy of the evaluation result are ensured.
Preferably, the flue-cured tobacco product grade in step S1 is classified based on the raw tobacco grade.
Preferably, the homogenization evaluation index in step S1 includes a finished product online processing index, a finished product physical property index, and a finished product chemical property index.
Preferably, the finished product online processing index is a failure rate of flue-cured tobacco online processing, the finished product physical characteristic index comprises a finished product leaf structure, a leaf stem content rate and a boxing density deviation, and the finished product chemical characteristic index comprises a finished product nicotine CV value, a moisture CV value and a sugar-alkali ratio CV value.
Preferably, the coincidence function in step S2 includes a rising type coincidence function, an intermediate type coincidence function, and a falling type coincidence function;
the rising coincidence function is
，
The inter-type coincidence function is
，
The falling-down coincidence function is
，
Wherein x is an observed value of a homogenization evaluation index, a is an upper limit of the observed value of the homogenization evaluation index, b is an upper limit of the optimal value of the homogenization evaluation index, c is a lower limit of the optimal value of the homogenization evaluation index, and d is a lower limit of the observed value of the homogenization evaluation index.
Preferably, step S3 performs dimensionless processing on the data values of the homogenization evaluation indexes of the flue-cured tobacco finished product grades of each batch before determining the weight of each homogenization evaluation index.
Preferably, in step S3, the weight of each homogenization evaluation index is a combined weight, and the subjective weighting method and the objective weighting method are adopted to weight the homogenization evaluation index, and then the combination weighting method is adopted to determine the combination weighting.
Preferably, the homogenization evaluation score of each batch of the single-grade flue-cured tobacco finished product in the step S5 is obtained by averaging after a plurality of times of combination, and the method of combination comprises an average method, a Bodak method and a keplam method.
Preferably, the end of the combination is provided with the condition that the variance average value is equal to 0, and if the variance average value is not 0, the result of the previous round of combination is continuously recombined;
the calculation formula of the variance average value is
Wherein R2 mean represents the average value of the variance of the sorting results of all the grades of the finished flue-cured tobacco products in each batch after one round of combination, R2 i represents the variance of the sorting results of the single-grade different combination methods of the finished flue-cured tobacco products in each batch, and n represents the total number of the grades of the finished flue-cured tobacco products in each batch.
Preferably, in step S7, the evaluation of the homogenization degree of each batch of cured tobacco finished products is sorted by sequentially decreasing from large to small, with the highest value and the lowest value of the homogenization evaluation result of each batch of cured tobacco finished products in step S6 as a boundary.
The invention has the beneficial effects that:
(1) The invention provides an evaluation method for the homogenization degree of a finished cured tobacco product processed in batches, which is characterized in that on the basis of on-line processing indexes, physical characteristic indexes and chemical characteristic indexes of the finished cured tobacco product processed in batches, a coincidence function model of the homogenization indexes of the finished cured tobacco product is established, and each homogenization evaluation index is scientifically quantized, so that the homogenization evaluation result is more reasonable.
(2) On the basis of considering index preference and weighting objectivity, the method determines the uniform homogenization evaluation result of the finished products of the batch processed flue-cured tobacco after combination and multiple averaging, ensures the objectivity and accuracy of the evaluation result, and provides decision basis and theoretical support for scientific evaluation of the homogenization processing degree of the flue-cured tobacco.
(3) According to the invention, by comprehensively considering the grade quality and quantity information of the flue-cured tobacco finished products in each batch of processing, the homogenization degree of the flue-cured tobacco finished products in batch processing is subjected to more systematic and comprehensive analysis and evaluation, and a practical foundation is laid for more comprehensive evaluation of threshing and redrying processing quality.
(4) The flue-cured tobacco finished product acquired by the method covers all the flue-cured tobacco finished product grades produced in each batch, ensures the diversity of sample acquisition and ensures the wide applicability of the evaluation method.
(5) The evaluation method has the advantages of easily obtained data, simple operation and convenient popularization and application in the batch flue-cured tobacco processing process.
Drawings
FIG. 1 is a flow chart of a method for evaluating the degree of homogenization of a finished cured tobacco product in a batch process;
FIG. 2 is a graph showing the progressive relationship of the homogenization evaluation level of the cured tobacco product.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
A flow chart of an evaluation method for the homogenization degree of finished cured tobacco products processed in batches is shown in fig. 1, and comprises the following steps:
s1: and collecting tobacco flake samples of all the finished tobacco grades produced in batches, and determining the data value of the homogenization evaluation index of all the finished tobacco grades in batches through detection or calculation. The grade of the flue-cured tobacco finished product is divided according to the grade of the raw tobacco of the incoming material.
In the embodiment of the invention, 7 batches of flue-cured tobacco finished products are selected for collecting flue-cured tobacco finished product samples, and the 7 batches are named A, B, C, D, E, F, G respectively; the same batch is sampled in 5 stages, 2% of the boxes in each stage are extracted in each stage, less than 100 boxes are sampled according to 2 boxes, the sampling interval is 20 finished boxes, and all the grades of all the batches are covered. And when sampling, turning up the tobacco flakes with the thickness of 10 cm-20 cm on the upper layer of the tobacco box, and then extracting the whole tobacco flakes, wherein each sample (3000+/-300 g).
The homogenization evaluation index comprises a finished product online processing index, a finished product physical characteristic index and a finished product chemical characteristic index. The finished product online processing index is the failure rate of online flue-cured tobacco processing; the physical characteristic indexes of the finished product comprise a finished product leaf structure, leaf stem content and boxing density deviation, and the detection methods of the leaf structure, leaf stem content and boxing density deviation are respectively carried out by referring to GB/T21137, GB/T21136 and YC/T236; the chemical characteristics of the finished product include the CV value of the finished product nicotine, the CV value of the moisture and the CV value of the sugar base ratio, and the tests are respectively carried out according to YC/T160, YC/T31 and YC/T159.
The data values of the homogenization evaluation indexes are shown in table 1, and comprise minimum values, maximum values and average values of the index data of the physical characteristics and chemical characteristics of the finished products in each batch; the method specifically comprises the steps of online processing failure rate of flue-cured tobacco finished products in each batch, finished product nicotine CV value, finished product moisture CV value, finished product sugar-alkali ratio CV value, finished product leaf stem content, boxing density deviation and minimum, maximum and average values of finished product leaf structures.
Table 1 data value table of flue-cured tobacco product homogenization evaluation index
S2: and constructing a coincidence function model, and determining the coincidence score of the homogenization evaluation index of the finished product grade of each batch of flue-cured tobacco.
The construction method of the coincidence function model comprises the following steps:
and constructing a coincidence function model according to the experience value of each homogenization evaluation index, and determining the coincidence score of the homogenization evaluation index to the experience value. The conformity function model is divided into 3 types, namely an ascending type, an intermediate type and a descending type; the flue-cured tobacco online processing failure rate, the stem content in the finished leaves, the boxing density deviation, the finished nicotine CV value, the finished water CV value and the finished sugar-alkali ratio CV value adopt rising-type coincidence functions; the finished blade structure adopts a descent-type coincidence function. The empirical values of the homogenization evaluation indexes are shown in table 2, and the final coincidence score of the homogenization evaluation indexes of the finished product grades of the flue-cured tobacco in each batch is finally determined. The conformity scores for each batch of cured tobacco products in table 3 are averaged. The closer the coincidence degree value is to 1, the higher the coincidence degree of the corresponding homogenization evaluation index and the empirical value is.
The rising type coincidence degree function is as follows:
，
the intermediate type conformity function is:
，
the falling-down type coincidence degree function is as follows:
；
wherein x is an observed value of a homogenization evaluation index, a is an upper limit of the observed value of the homogenization evaluation index, b is an upper limit of the optimal value of the homogenization evaluation index, c is a lower limit of the optimal value of the homogenization evaluation index, and d is a lower limit of the observed value of the homogenization evaluation index. Wherein a > b > c > d.
TABLE 2 functional type and empirical value Table for evaluating homogenization of cured tobacco products
TABLE 3 coincidence score table of flue-cured tobacco product homogenization evaluation index
S3: and determining the weight of each homogenization evaluation index by adopting a weighting method, wherein the weighting method comprises a subjective weighting method, an objective weighting method and a comprehensive weighting method.
Before determining the weight of each homogenization evaluation index of the flue-cured tobacco finished product, carrying out dimensionless treatment on the data value of the homogenization evaluation index. The dimensionless treatment method is as shown in the formula (1),
；
wherein X is ik Dimensionless processing result of kth homogenization evaluation index for finished product grade of each batch, X iko As the original value of the index, X mink As the minimum index value, X maxk Is the index maximum.
The average value results of dimensionless treatment of the homogenization evaluation indexes of the flue-cured tobacco finished products in each batch are shown in Table 4.
TABLE 4 non-dimensional treatment results of flue-cured tobacco final product homogenization evaluation index
The weight of each homogenization evaluation index is a combined weight, and the subjective weighting method and the objective weighting method are adopted to weight the homogenization evaluation index, and then the combination weighting method is adopted to determine the combination weighting; the subjective weighting method and the objective weighting method comprise a subjective weighting method, an objective weighting method 1 and an objective weighting method 2, and the comprehensive weighting method comprises a dispersion method, a game method and a unitization method.
In the embodiment of the invention, a subjective weighting method, an objective weighting method 1 and an objective weighting method 2 are adopted to respectively weight the homogenization evaluation index.
(1) The subjective weighting method of the embodiment of the invention is as follows:
the factors influencing the homogenization degree of the finished product are summarized, and the relation of the evaluation indexes is shown in fig. 2.
According to the comparison matrix scale and the meaning table of the comparison matrix scale in Table 5, a comparison matrix of the importance of each index is constructed, and the weights of each layer are calculated on the basis of the comparison matrix. First, the weight of the quasi-side layer (B layer) to the target layer (a layer) is calculated. And calculating the weight of the index layer (C layer) aiming at the side layer (B layer), and finally calculating the weight of the index layer (C layer) on the target layer (A layer).
Table 5 compares matrix scales and their meanings
When the contrast matrix of each index is constructed, the indexes are required to be compared in pairs, and in order to avoid the situation that the index i is 2 times more important than the index j, the index j is 3 times more important than the index k, and the index k is 2 times more important than the index i, consistency test is carried out on the constructed contrast matrix. Calculating the maximum feature root of the matrix by the formula (2);
；
wherein lambda is max Representing the maximum characteristic root, aw represents the product of index weight and index corresponding to each row of the comparison matrix, wi represents the subjective weight of the ith index, and n represents the index number.
The consistency index CI is calculated by using the formula (3),
；
wherein lambda is max Represents the maximum characteristic root, and n represents the index number.
The random consistency of the matrix is calculated according to equation (4),
；
when CR is less than or equal to 0.1, matrix consistency is considered acceptable. Wherein RI is constant, and specific values are shown in Table 6.
Table 6 RI values
(2) Objective weighting method 1:
calculating standard deviation of each index subjected to dimensionless treatment by adopting a formula (5),
；
S k sample standard deviation, X, of the kth index ik The dimensionless processing result of the kth index of the finished product grade of each batch i,the average value of the non-dimensional processing results of the kth index, n is the sum of the number of the finished product grades of each batch;
the weight of each index is calculated by using the formula (6),
；
W k the weight value of the kth index is given, and m is the index number.
(3) Objective weighting method 2:
constructing an evaluation matrix X according to a formula (7) from dimensionless evaluation data ij （i=1，2，3，…，n；j=1，2，3，…，m），
；
Wherein X is ij Refers to the j-th homogenization evaluation index value of the lot i final grade. Calculating the characteristic proportion of the i finished product grade under the j index,
；
calculating entropy value H of jth index j ，
；
Wherein n represents the total number of the sampled product grades, H j The entropy value representing the j-th index.
Entropy value H according to each homogenization evaluation index j The weight is calculated and the weight is calculated,
；
in, W j And m is the number of homogenization evaluation indexes, wherein the weight value is the j index.
The comprehensive weighting method adopted in the embodiment of the invention comprises a dispersion method, a game method and a unitization method; and determining the weight of each homogenization evaluation index by using the three comprehensive weighting methods. Respectively obtaining the dispersion combination weight W a Game combination weight W b And unitized combining weights W c 。
(4) Dispersion method:
let the dispersion combining weight Wa be:
；
in which W is 1 、W 2 、W 3 Respectively representing weight coefficients calculated by three weight methods of a subjective weight method, an objective weight method 1 and an objective weight method 2, and theta k For the combined coefficient, θ k ≥0 （k=1，2，3），
Setting a blocking matrix:
；
to maximize the sum of squares of the deviations of the homogenization evaluations, an objective function was constructed,
；
；
wherein b is mn Normalized values representing the nth homogenization evaluation index for the finished product grade of each batch m. Obtaining matrix W T B 1 The maximum characteristic root of W and the corresponding unitized characteristic vector thereof are normalized and substituted into (11) to obtain the dispersion combination weight W a 。
(5) Gaming method:
game combined weight coefficient W b Can be expressed as:
；
wherein, represents the combination coefficient, W i The weight coefficients of three weighting methods, namely a subjective weighting method, an objective weighting method 1 and an objective weighting method 2, are represented respectively. To W b And each W i And (3) the difference is minimized, and the following is obtained:
；
calculating a combination coefficient by the formula (16), substituting the combination coefficient into the formula (16) after normalization, and obtaining a game combination weight W b 。
(6) The unitizing method comprises the following steps:
let W be c Is unitized and combined weight, W 1 ，W 2 ，W 3 The weight coefficients obtained by the subjective weighting method, the objective weighting method 1 and the objective weighting method 2 are calculated respectively, and then:
；
wherein, the combination coefficient satisfies the condition:
；
the target value of the homogenization evaluation of the flue-cured tobacco finished product grade of each batch is as follows:
；
wherein b is ij And (3) representing the standardized value of the j-th homogenization evaluation index of the finished product grade of each batch i, wherein m represents the number of the finished product grades. The structure is as follows:
；
；
and (3) after normalization treatment, obtaining:
；
obtaining a unitized combination weight W from the obtained substitution formula (17) c 。
Based on dimensionless processing results of 7 homogenizing evaluation indexes of the flue-cured tobacco finished product, subjective and objective weights of each index are calculated by using a subjective weighting method, an objective weighting method 1 and an objective weighting method 2, and weights of each homogenizing evaluation index are calculated by using a dispersion method, a game method and a unitization method, and the results are shown in Table 7.
TABLE 7 weight of each homogenization evaluation index
S4: and determining the comprehensive grading value of the homogenization evaluation conformity of each batch of single-grade flue-cured tobacco finished products and the ranking of the flue-cured tobacco finished product grade corresponding to the comprehensive grading value in all grades of each batch according to the conformity scores of the homogenization evaluation indexes of the batches of flue-cured tobacco finished products in step S2 and the weights of the homogenization evaluation indexes in step S3, wherein the comprehensive conformity grading values and ranking table results of the grade homogenization evaluation indexes are shown in table 8.
The method for determining the comprehensive scoring value of the uniformity evaluation conformity degree of each batch of single-grade flue-cured tobacco finished products is shown as the formula (23)
；
Wherein C is is A comprehensive value representing the uniformity index conformity of the finished product grade of each batch i under the s-th combination weight, C ik A conformity score, W, representing the kth index of the i finished product grade ks The weight of the kth index under the s-th combination weighting method is given, and m is the index number.
Table 8 comprehensive score value and ranking table for uniformity evaluation conformity of cured tobacco products of single grade
S5: and (3) determining the homogenization evaluation score of each batch of single-grade flue-cured tobacco finished products according to the comprehensive score value and the ranking of the homogenization evaluation conformity of each batch of single-grade flue-cured tobacco finished products in the step (S4). The homogenization evaluation score of each batch of single-grade flue-cured tobacco finished products is obtained by averaging after a plurality of times of combination, and the combination method comprises an average value method, a Bodak method and a keplam method.
Based on the comprehensive value and ranking of the uniformity evaluation conformity of each batch of single-grade flue-cured tobacco finished products, the average value method, the Bodak method and the Koplam method are combined for a plurality of times to obtain the uniformity evaluation result of the combined flue-cured tobacco finished product grade (see table 9); the homogenization evaluation scores and ranking results of the flue-cured tobacco finished product grades obtained after the 3 methods are averaged are shown in Table 10;
the average value method, the Boda method and the Kopulan method are applied to combine the comprehensive values and the ranks of the homogenization evaluation coincidence degree of the single-grade flue-cured tobacco finished products in each batch for a plurality of times, and then the homogenization evaluation score of the single-grade flue-cured tobacco finished products in each batch is obtained on average;
；
wherein C represents the homogenization evaluation score of each batch of single-grade flue-cured tobacco finished products, C A 、C B 、C C Respectively representing homogenization evaluation scores of single-grade flue-cured tobacco finished products of each batch obtained by combining an average value method, a Macleaya cordata method and a Koplam method for a plurality of times;
(1) Average method
Let r be ik For each lot i the final grade is ranked by the kth combined weighting method, i=1, 2,3, …, n, k=1, 2,3. The score for each method is calculated using equation (25),
；
the average of the scores of the different methods is then calculated,
；
the scores calculated according to the formula (26) are reordered, if the scores of 2 flue-cured tobacco finished product grades are equal, the variance of the scores under each method is calculated, and the ranking with small variance is the front.
(2) Boda method
Under 3 combined weight methods, the comprehensive value X of the grade coincidence degree of the finished products of each batch i i Integrated value X superior to the grade conformity of j finished products j The number of (2) is greater than X j Is better than X i The number of (1) is recorded as X i Obtain 1 score, namely:
；
；
wherein b is i Representing i product grade scores, n representing the number of product grades in each batch. According to b i Is ordered in sequence. If the scores are the same, the small score variance calculated by the average method is preferable.
(3) Kepram process
Under 3 combined weight methods, the comprehensive value X of the grade coincidence degree of the finished products of each batch i i Integrated value X of the degree of compliance of the finished product class j j The number of (2) is greater than X j Is better than X i The number of (1) is recorded as X i Obtaining 1 score; if the contrary, record X j Obtain 1 score, namely:
；
；
wherein, c i Representing i product grade scores, n representing the number of product grades in each batch. According to c i Is ordered in sequence. If the scores are the same, the small score variance calculated by the average method is preferable.
(4) Mean value of variance
And (3) combining the comprehensive value and ranking of the homogenization evaluation conformity of each batch of single-grade flue-cured tobacco finished products calculated in the step (S4) according to the 3 methods to obtain new score and sequencing results. Calculating a variance average value R2 mean of the sorting results of each method,
；
wherein R2 mean represents the average value of the variances of all the ranking results of the cured tobacco finished products in each batch after one round of combination, R2 i represents the variances of the ranking results of the cured tobacco finished products in each batch by using a single-grade 3 combination method, and n represents the total number of the cured tobacco finished product grades in each batch. If R2 mean is 0, the combination ends. If R2 mean is not 0, the previous wheel combination result is recombined by using the 3 methods until R2 mean is 0.
Table 9 homogenization evaluation results of single-grade cured tobacco finished products after multiple combinations
Table 10 homogenization evaluation score and ranking of individual batches of single-grade flue-cured tobacco finished products
S6: determining a homogenization evaluation result of each batch of finished flue-cured tobacco products according to the grade number of each batch of finished flue-cured tobacco products and the homogenization evaluation score of each batch of single-grade finished flue-cured tobacco products in the step S5;
and calculating the homogenization evaluation results of the finished flue-cured tobacco products processed in each batch according to the grade number of the finished flue-cured tobacco products processed in each batch and the homogenization evaluation score of each grade, wherein the results are shown in Table 11.
；
Wherein H represents the homogenization evaluation result of each batch of flue-cured tobacco finished products, H i And (3) representing the homogenization evaluation score of the finished product grade of the batch i, wherein n is the grade number of the finished flue-cured tobacco products of the batch.
Table 11 homogenization evaluation results of cured tobacco products processed in batches
S7: and (3) evaluating the homogenization processing degree of each batch of flue-cured tobacco according to the homogenization evaluation result of each batch of flue-cured tobacco finished products obtained in the step (S6), and determining the batch processing technology which is preferentially selected in the flue-cured tobacco threshing and redrying process.
And (3) evaluating the homogenization processing degree of each batch by taking the highest value and the lowest value of the homogenization evaluation result of each batch of flue-cured tobacco finished products in the step (S6) as a boundary, and sequencing the homogenization processing degree in descending order from large to small. The order of the homogenization degree of each batch of cured tobacco products is shown in Table 12.
Table 12 sorting of degree of homogenization processing of cured tobacco products in batches
The homogenization degree ranking of each batch of processed flue-cured tobacco finished products is E, C, B, D, A, F, G in sequence. According to the sequencing result of the homogenization processing degree of the finished tobacco products in batches, in the tobacco threshing and redrying process, the processing technology of the batch with the highest evaluation score and the forefront sequencing is preferentially referred to for homogenization processing, so that the processing quality of threshing and redrying is continuously improved and improved, and finally, the scientific improvement of the homogenization processing level of threshing and redrying is achieved, and the stability of Chinese cigarette quality is continuously ensured.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An evaluation method for the homogenization degree of finished cured tobacco products processed in batches comprises the following steps:
s1: collecting tobacco flake samples of the tobacco finished product grades produced in each batch, and determining the data value of the homogenization evaluation index of the tobacco finished product grades in each batch through detection or calculation;
s2: constructing a coincidence function model, and determining a coincidence score of the homogenization evaluation index of the flue-cured tobacco finished product grade of each batch;
s3: determining the weight of each homogenization evaluation index by adopting a weighting method, wherein the weighting method comprises a subjective weighting method, an objective weighting method and a comprehensive weighting method;
s4: determining the comprehensive grading value of the uniformity evaluation conformity of each batch of single-grade flue-cured tobacco finished products according to the conformity scores of the uniformity evaluation indexes of each batch of flue-cured tobacco finished products in the step S2 and the weights of the uniformity evaluation indexes in the step S3, wherein the ranking of the flue-cured tobacco finished products in all grades of each batch is corresponding to the conformity comprehensive grading value;
s5: determining the homogenization evaluation score of each batch of single-grade flue-cured tobacco finished products according to the comprehensive score value and the ranking of the homogenization evaluation conformity of each batch of single-grade flue-cured tobacco finished products in the step S4;
s6: determining a homogenization evaluation result of each batch of finished flue-cured tobacco products according to the grade number of each batch of finished flue-cured tobacco products and the homogenization evaluation score of each batch of single-grade finished flue-cured tobacco products in the step S5;
s7: evaluating the homogenization processing degree of each batch of flue-cured tobacco according to the homogenization evaluation result of each batch of flue-cured tobacco finished products obtained in the step S6, and determining a batch processing technology which is preferentially selected in the flue-cured tobacco threshing and redrying process;
the homogenization evaluation indexes comprise a finished product online processing index, a finished product physical characteristic index and a finished product chemical characteristic index;
the finished product online processing index is the failure rate of flue-cured tobacco online processing, the finished product physical characteristic index comprises a finished product leaf structure, a leaf stem content rate and a boxing density deviation, and the finished product chemical characteristic index comprises a finished product nicotine CV value, a moisture CV value and a sugar-alkali ratio CV value.
2. The method for evaluating the homogenization degree of a finished cured tobacco processed in batch according to claim 1, wherein the method comprises the following steps: the flue-cured tobacco product grade in the step S1 is classified according to the original tobacco grade of the incoming materials.
3. The method for evaluating the homogenization degree of a finished cured tobacco processed in batch according to claim 1, wherein the method comprises the following steps: the coincidence degree function model in the step S2 comprises a rising coincidence function, an intermediate coincidence function and a falling coincidence function;
the rising coincidence function is
，
The inter-type coincidence function is
，
The falling-down coincidence function is
，
Wherein x is an observed value of a homogenization evaluation index, a is an upper limit of the observed value of the homogenization evaluation index, b is an upper limit of the optimal value of the homogenization evaluation index, c is a lower limit of the optimal value of the homogenization evaluation index, and d is a lower limit of the observed value of the homogenization evaluation index.
4. The method for evaluating the homogenization degree of a finished cured tobacco processed in batch according to claim 1, wherein the method comprises the following steps: and step S3, before determining the weight of each homogenization evaluation index, carrying out dimensionless treatment on the data value of each batch of flue-cured tobacco finished product grade homogenization evaluation index.
5. The method for evaluating the homogenization degree of a finished cured tobacco processed in batch according to claim 1, wherein the method comprises the following steps: and S3, the weight of each homogenization evaluation index is a combined weight, and the subjective weighting method and the objective weighting method are adopted to weight the homogenization evaluation index, and then the combination weighting method is adopted to determine the weight.
6. The method for evaluating the homogenization degree of a finished cured tobacco processed in batch according to claim 1, wherein the method comprises the following steps: the homogenization evaluation score of each batch of single-grade flue-cured tobacco finished products in the step S5 is obtained by averaging after a plurality of times of combination, and the method of combination comprises an average value method, a Bodak method and a kepram method.
7. The method for evaluating the homogenization degree of a finished cured tobacco processed in batch according to claim 6, wherein the method comprises the following steps: the end of the combination takes the variance average value equal to 0 as a necessary condition, and if the variance average value is not 0, the result of the previous round of combination is continuously recombined;
the calculation formula of the variance average value is
Wherein R is 2 mean Represents the average value of variance of all the grading sequencing results of each batch of cured tobacco finished products after one round of combination, R 2 i The variance of the sequencing results of the single-grade different combination methods of the flue-cured tobacco finished products in each batch is represented, and n represents the total number of the grades of the flue-cured tobacco finished products in each batch.
8. The method for evaluating the homogenization degree of a finished cured tobacco processed in batch according to claim 1, wherein the method comprises the following steps: and S7, evaluating the homogenization processing degree of each batch of flue-cured tobacco finished products, wherein the highest value and the lowest value of the homogenization evaluation result of each batch of flue-cured tobacco finished products in the step S6 are used as boundaries, and the homogenization processing degree is orderly and progressively reduced from large to small for sorting.
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