CN115409153A - Attention LSTM-based animal husbandry index prediction method and prediction system - Google Patents
Attention LSTM-based animal husbandry index prediction method and prediction system Download PDFInfo
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Abstract
The invention discloses an attention LSTM-based animal husbandry index prediction method, which comprises the following steps of: collecting historical data of each index generated by livestock in the feeding process; judging whether the historical data has missing values or not, and classifying the historical data into a first complete data set and a missing data set; dividing and preprocessing the missing data set according to the proportion occupied by the missing values in the missing data set to obtain a second complete data set and a corrected data set; filling missing values in the corrected data set by using a data similarity filling method to obtain a third complete data set; and inputting the first complete data set, the second complete data set and the third complete data set into the model for calculation based on a pre-established LSTM attention neural network model, and outputting the prediction results of all indexes. The method solves the problem that the traditional LSTM can only extract sequence information along the time dimension, such as characteristics of weight and the like, but the information of feed utilization rate and the like can not extract effective characteristics, and improves the prediction precision.
Description
Technical Field
The invention belongs to the technical field of 5G mobile communication and signal processing, and particularly relates to a livestock raising index prediction method and system based on attention LSTM.
Background
Animal husbandry is an extremely important link for exchanging materials between human beings and the nature, is one of components of agriculture, and is a two-large support for agricultural production in parallel with planting industry. The traditional breeding mode of animal husbandry pays huge cost for detecting various indexes of the bred animals every year. The method has the advantages that the indexes of the livestock are efficiently and reliably predicted by using an artificial intelligence technology, so that people can be helped to optimize the management of the cultured animals, and meanwhile, the cost is effectively reduced.
The traditional LSTM model neural network can only extract sequence information along a time dimension, such as characteristics of weight and the like, while information such as feed utilization rate and the like cannot accurately extract effective characteristics from other historical characteristic data, and because a large amount of missing value and abnormal value data exist in data acquired by various human factors, equipment and the like, the prediction precision is low during index prediction.
In addition, for the filling of missing data in data preprocessing, the traditional solution is mean filling, mode filling, median filling, hot card filling, cold card filling, regression filling, multiple interpolation, etc. However, in the daily monitoring process, along with the accumulation of data, the calculation process of the calculation method is complex, and the calculation amount is huge.
Therefore, for the data missing problem, a machine learning algorithm is used to perform the filling process, for example:
(1) The KNN algorithm is used for filling missing data, however, the algorithm needs to search K neighbors for sample points in each test set, in the algorithm execution process, in order to calculate the distance between a current sample to be classified and each sample point in a training set, the algorithm needs to traverse the whole training set, the time cost is huge, and especially when the number of the training set sample points or the test set sample points is huge.
(2) When the euclidean distance is adopted for data filling, the accuracy and reliability of the filled data object are insufficient under the condition that the sample points are scattered.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a livestock raising index prediction method and an estimation system based on attention LSTM, aiming at solving the following technical problems in the prior art:
(1) The traditional LSTM model neural network can only extract sequence information along a time dimension, such as characteristics of weight and the like, and information of feed utilization rate and the like cannot accurately extract effective characteristics from other historical characteristic data, so that the prediction accuracy of prediction indexes is low.
(2) In the prior art, an algorithm for solving the problem of data loss is accurate in calculation, but the calculation amount is huge; or where the calculations are relatively simple but less accurate.
The invention is realized by adopting the following technical scheme:
an attention LSTM-based livestock raising index prediction method comprises the following steps:
collecting historical data generated by livestock in a feeding process, wherein the historical data comprises index parameters;
judging whether the historical data has missing values or not, and classifying the historical data into a first complete data set and a missing data set;
dividing and preprocessing the missing data set according to the proportion occupied by the missing values in the missing data set to obtain a second complete data set and a corrected data set;
filling missing values in the corrected data set by using a data similarity filling method to obtain a third complete data set;
and inputting the first complete data set, the second complete data set and the third complete data set into the model for calculation based on a pre-established LSTM attention neural network model, and outputting the prediction results of all indexes.
In order to optimize the technical scheme, the specific measures adopted further comprise:
further, the historical data comprises livestock data and feeding data, and index parameters of the livestock data comprise weight, age in days and back muscle thickness; the index parameters of the feeding data comprise feed utilization rate and feed feeding frequency.
Further, according to the proportion occupied by the missing values in the missing data set, the missing data set is divided and preprocessed to obtain a second complete data set and a modified data set, and the method specifically comprises the following steps:
calculating the ratio of the missing values to the missing data set;
if the proportion is smaller than the set value, deleting the data corresponding to the missing value in the missing data set to obtain a second complete data set;
if the proportion is larger than the set value, the data is divided into correction data sets.
Further, the filling of missing values is performed on the corrected data set by using a data similarity filling method to obtain a third complete data set, which specifically includes:
acquiring a complete data set, wherein the complete data set comprises m data objects, and the data objects comprise n attributes;
the weights of the attributes are calculated from the data objects in the complete data set,
wherein:denotes the firstThe variance of the individual attributes, m represents the number of data objects in the complete data set,is shown asData object ofThe value of the one or more attributes is,denotes the firstThe average value of the individual attributes is,is shown asThe correlation between one attribute and the other attributes,denotes the firstAn attribute andthe correlation coefficient between the individual attributes is,denotes the firstThe amount of information that an individual attribute contains,denotes the firstA weight value of each attribute;
the similarity between the data objects is calculated,
wherein:which is indicative of the parameters of the adjustment,representAnd withIn the first placejThe minimum value of the absolute value difference over the attributes,representAnd withIn the first placejThe maximum value of the absolute value difference over the attributes,representAnd withIn the first placejThe degree of similarity between the attributes is determined,to representAndthe degree of similarity of (a) to (b),indicating that the 0 th data object has attribute missing,representing a data object with complete attributes;
selecting the front part of the complete data set according to the similaritykComplete data objects, which are similar to the data object for which there is a loss of attributes, computing a fill value,
wherein:representing data objectsMissing attributesIs determined by the estimated value of (c),is shown asOf a complete data objectThe value of the attribute(s) is (are),kindicating the number of data;
and filling the filling values into the corresponding missing values in the corrected data set to obtain a third complete data set.
Further, before inputting the first complete data set, the second complete data set, and the third complete data set into the model for calculation and outputting the prediction result of each index based on the pre-established LSTM attention neural network model, the method further includes establishing an LSTM attention neural network model, specifically:
collecting sample data of livestock in the breeding process;
establishing a neural network model comprising an input layer, an LSTM layer, an Attention layer and an output layer, and initializing the neural network model;
determines a weighting coefficient allocation mechanism of the Attention layer,
wherein:a value of the probability distribution of attention is represented,the representation of the learnable parameter is,the weight parameter is represented by a weight value,the output vector representing the LSTM layer, b the bias coefficients,representing the output value of the Attention layer at the time t;
the output mechanism of the output layer is set,
wherein:y t the value of the predicted output is represented,w o a matrix of weights is represented by a matrix of weights,b o a deviation vector is represented.
According to another aspect of the invention, the invention provides an attention LSTM based stockbreeding index prediction system, the system comprising:
the data acquisition module is used for acquiring historical data of each index generated in the livestock breeding process;
the data processing module is used for judging whether the historical data has missing values or not and classifying the historical data into a first complete data set and a missing data set;
the data filling module is used for filling missing values in the corrected data set by using a data filling method of data similarity to obtain a third complete data set;
and the calculation module is used for inputting the first complete data set, the second complete data set or the third complete data set into the model for calculation based on a pre-established LSTM attention neural network model and outputting the prediction result of each index.
Further, the system further comprises a modeling unit for establishing an LSTM attention neural network model, wherein the establishing an LSTM attention neural network model comprises:
collecting sample data of livestock in the feeding process;
establishing a neural network model comprising an input layer, an LSTM layer, an Attention layer and an output layer, and initializing the neural network model;
determining a weighting coefficient distribution mechanism of an Attention layer;
and setting an output mechanism of the output layer.
According to another aspect of the present invention, the present invention provides a network side server, including at least one processor;
and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of the method of any one of claims 1-5.
The invention has the beneficial effects that:
compared with the prior art, the animal husbandry index prediction method based on attention LSTM solves the problems that the conventional LSTM can only extract sequence information along the time dimension, such as weight and other features, and the information such as feed utilization rate cannot accurately extract effective features from other historical feature data, and improves prediction accuracy.
Meanwhile, the data similarity filling method is utilized, the K similar data objects are searched for data filling, errors caused by data point distribution in the KNN algorithm are reduced, the accuracy of filling data is improved, meanwhile, the complexity of calculation simulation is greatly reduced, and the calculation time is shortened.
Drawings
Fig. 1 is a flowchart of a livestock index prediction method based on attention LSTM according to a first embodiment of the present invention.
Fig. 2 is a flowchart of the operation provided by the first embodiment of the present invention.
Fig. 3 is a flowchart of the LSTM attention neural network model according to the first embodiment of the present invention.
Fig. 4 is a block diagram of a system for predicting animal husbandry index based on attention LSTM according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a network-side server according to a third embodiment of the present invention.
Detailed Description
In order to clarify the technical solutions and operating principles of the present invention, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments, and it should be noted that, without conflict, any combination between the embodiments described below or between the technical features may form a new embodiment.
First embodiment
The invention provides a livestock raising index prediction method based on attention LSTM, which comprises the following steps:
s1: collecting historical data generated by livestock in the feeding process, wherein the historical data comprises index parameters;
specifically, the historical data comprises livestock data and feeding data, and index parameters of the livestock data comprise weight, age in days and back muscle thickness; the index parameters of the feeding data comprise feed utilization rate and feed feeding frequency.
S2: judging whether the historical data has a missing value or not, and classifying the historical data into a first complete data set and a missing data set;
specifically, the missing value is the absence of a certain index parameter.
S3: and dividing and preprocessing the missing data set according to the occupied proportion of the missing values in the missing data set to obtain a second complete data set and a corrected data set.
S31: calculating the ratio of missing values to missing data sets;
s32: if the proportion is smaller than the set value, deleting the data corresponding to the missing value in the missing data set to obtain a second complete data set;
s33: if the proportion is larger than the set value, the data is divided into a correction data set.
S4: and filling missing values in the corrected data set by using a data similarity filling method to obtain a third complete data set.
S41: obtaining a complete data set, denoted asThe complete data set contains m data objects, each data object contains n attributes, and the attribute set of the 0 th data object is represented as;
Wherein the complete data set may comprise a number of animals for which data acquisition is required, e.g. the first pig is markedThe attribute set of the related index parameters of the boar is shown inThe above.
S42: the weights of the attributes are calculated from the data objects in the complete data set,
wherein:denotes the firstThe variance of the individual attributes, m represents the number of data objects in the complete data set,is shown asData object ofThe value of the individual attributes is,denotes the firstThe average value of the individual attributes is,is shown asThe correlation between an individual attribute and other attributes,is shown asAn attribute andthe correlation coefficient between the individual attributes is,denotes the firstThe amount of information that an individual attribute contains,is shown asA weight value of the individual attribute;
s43: the similarity between the data objects is calculated,
wherein:which is indicative of the adjustment parameter(s),to representAndin the first placejThe minimum value of the absolute value difference on the attribute,to representAnd withIn the first placejThe maximum value of the absolute value difference over the attributes,to representAndin the first placejThe degree of similarity between the attributes is determined,to representAnd withThe degree of similarity of (a) to (b),indicating that the 0 th data object has attribute missing,representing a data object with complete properties.
S44: selecting the front part of the complete data set according to the similaritykComplete data objects, which are similar to the data objects for which there is a loss of attributes, computing a fill value,
wherein:representing data objectsMissing attributesIs determined by the estimated value of (c),is shown asOf a complete data objectThe value of the attribute(s) is (are),kindicating the number of data;
s45: and filling the filling values into the corresponding missing values in the corrected data set to obtain a third complete data set.
S5: and establishing an LSTM attention neural network model.
Specifically, the method comprises the following steps: the LSTM attention neural network model combines an LSTM attention mechanism with a neural network model, and assigns corresponding weights to different information through information distribution probability, so that the prediction precision can be improved.
S51: collecting sample data of livestock in the breeding process;
establishing a neural network model comprising an input layer, an LSTM layer, an Attention layer and an output layer, and initializing the neural network model;
s52: determines a weighting coefficient allocation mechanism of the Attention layer,
wherein:the value of the probability distribution of attention is represented,the representation of the learnable parameter is,the weight parameter is represented by a weight value,represents the output vector of the LSTM layer, b represents the bias coefficient,the output value of the Attention layer at the time t is represented;
s53: the output mechanism of the output layer is set,
wherein:y t the value of the predicted output is represented,w o a matrix of weights is represented by a matrix of weights,b o a deviation vector is represented.
S6: and inputting the first complete data set, the second complete data set and the third complete data set into the model for calculation based on a pre-established LSTM attention neural network model, and outputting the prediction results of all indexes.
The following is a prediction process of a certain pig in a certain farm by adopting the prediction method in the scheme, table 1 shows the relevant historical data of the certain pig in the certain farm, and table 2 is a prediction result of comparing the prediction method with the scheme in the relevant prior art.
The livestock index prediction method based on attention LSTM can better extract data characteristics compared with the traditional LSTM, can calculate missing values more accurately compared with a KNN filling method, can use less sample size and shorter time, and can make more accurate prediction.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
Second embodiment:
as shown in fig. 4, a second embodiment of the present invention provides an attention LSTM based stockbreeding index prediction system, comprising,
the data acquisition module 201 is used for acquiring historical data of each index generated by livestock in the feeding process;
the data processing module 202 is configured to determine whether the historical data has a missing value, and classify the historical data into a first complete data set and a missing data set;
the data filling module 203 is configured to perform missing value filling on the corrected data set by using a data filling method of data similarity to obtain a third complete data set;
the calculation module 204 inputs the first complete data set, the second complete data set, or the third complete data set into the model for calculation based on a pre-established LSTM attention neural network model, and outputs a prediction result of each index.
Preferably, the system further comprises a modeling module 205 for building an LSTM attention neural network model, wherein the building the LSTM attention neural network model comprises:
collecting sample data of livestock in the breeding process;
establishing a neural network model comprising an input layer, an LSTM layer, an Attention layer and an output layer, and initializing the neural network model;
determining a weighting coefficient distribution mechanism of an Attention layer;
and setting an output mechanism of the output layer.
It should be understood that the present embodiment is a system example corresponding to the first embodiment, and the present embodiment may be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related technical details mentioned in the present embodiment can also be applied to the first embodiment.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
The third embodiment:
as shown in fig. 5, a third embodiment of the present invention provides a network side server, including: at least one processor 301; and a memory 302 communicatively coupled to the at least one processor; wherein the memory 302 stores instructions executable by the at least one processor 301 to cause the at least one processor 301 to perform one of the above-described LSTM-based animal husbandry index prediction methods.
The memory 301 and the processor 301 are coupled by a bus, which may comprise any number of interconnected buses and bridges that couple one or more of the various circuits of the processor 301 and the memory 301. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 301 is transmitted over a wireless medium through an antenna, which further receives the data and transmits the data to the processor 301.
The processor 301 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 301 may be used to store data used by processor 301 in performing operations.
The foregoing are embodiments of the present invention and are not intended to limit the scope of the invention to the particular forms set forth in the specification, which are set forth in the claims below, but rather are to be construed as the full breadth and scope of the claims, as defined by the appended claims, as defined in the appended claims, in order to provide a thorough understanding of the present invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (8)
1. An attention LSTM-based livestock raising index prediction method is characterized by comprising the following steps:
collecting historical data of each index generated by livestock in the feeding process;
judging whether the historical data has missing values or not, and classifying the historical data into a first complete data set and a missing data set;
dividing and preprocessing the missing data set according to the proportion occupied by the missing values in the missing data set to obtain a second complete data set and a corrected data set;
filling missing values in the corrected data set by using a data similarity filling method to obtain a third complete data set;
and inputting the first complete data set, the second complete data set and the third complete data set into the model for calculation based on a pre-established LSTM attention neural network model, and outputting the prediction results of all indexes.
2. The attention LSTM based animal husbandry index prediction method according to claim 1, wherein the historical data comprises livestock data and feeding data, and the index parameters of the livestock data comprise weight, age, dorsal muscle thickness; the index parameters of the feeding data comprise feed utilization rate and feed feeding frequency.
3. A method for animal husbandry index prediction based on attention LSTM as claimed in claim 2, wherein the missing data set is divided and preprocessed according to the ratio of the missing values in the missing data set to obtain a second complete data set and a modified data set, specifically:
calculating the ratio of the missing values to the missing data set;
if the proportion is smaller than the set value, deleting the data corresponding to the missing value in the missing data set to obtain a second complete data set;
if the proportion is larger than the set value, the data is divided into correction data sets.
4. The attention LSTM-based animal husbandry index prediction method according to claim 3, wherein the data similarity filling method is used to fill the missing values into the corrected data set to obtain a third complete data set, specifically:
acquiring a complete data set, wherein the complete data set comprises m data objects, and the data objects comprise n attributes;
the weights of the attributes are calculated from the data objects in the complete data set,
wherein:is shown asThe variance of the individual attributes, m represents the number of data objects in the complete data set,denotes the firstData object ofThe value of the individual attributes is,is shown asThe average value of the individual attributes is,is shown asThe correlation between one attribute and the other attributes,denotes the firstAn attribute andthe correlation coefficient between the individual attributes is,is shown asThe amount of information that an individual attribute contains,is shown asA weight value of the individual attribute;
the similarity between the data objects is calculated,
wherein:which is indicative of the adjustment parameter(s),to representAnd withIn the first placejThe minimum value of the absolute value difference on the attribute,representAndin the first placejThe maximum value of the absolute value difference over the individual attributes,to representAndin the first placejThe degree of similarity in the individual attributes,to representAnd withThe degree of similarity of (a) to (b),indicating that the 0 th data object has attribute missing,representing a data object with complete attributes;
according to the similarity, before selecting the complete data setkComplete data objects, which are similar to the data objects for which there is a loss of attributes, computing a fill value,
wherein:representing data objectsMissing attributesIs determined by the estimated value of (c),is shown asOf a complete data objectThe value of the attribute(s) is (are),kindicating the number of data;
and filling the filling values into the corresponding missing values in the corrected data set to obtain a third complete data set.
5. The method as claimed in claim 4, further comprising establishing an LSTM attention neural network model before inputting the first complete data set or the second complete data set or the third complete data set into the LSTM attention neural network model based on the pre-established LSTM attention neural network model for calculating and outputting the predicted result of each index, specifically:
collecting sample data of livestock in the feeding process;
establishing a neural network model comprising an input layer, an LSTM layer, an Attention layer and an output layer, and initializing the neural network model;
determines a weight coefficient allocation mechanism of the Attention layer,
wherein:the value of the probability distribution of attention is represented,the representation of the learnable parameter is,a weight parameter is represented that is a function of,represents the output vector of the LSTM layer, b represents the bias coefficient,the output value of the Attention layer at the time t is represented;
the output mechanism of the output layer is set,
wherein:y t a value representing the predicted output value is indicated,w o a matrix of weights is represented by a matrix of weights,b o a deviation vector is represented.
6. An attention LSTM based stockbreeding index prediction system, the system comprising:
the data acquisition module is used for acquiring historical data of each index generated in the livestock breeding process;
the data processing module is used for judging whether the historical data has missing values or not and classifying the historical data into a first complete data set and a missing data set;
the data filling module is used for filling missing values in the corrected data set by using a data filling method of data similarity to obtain a third complete data set;
and the calculation module is used for inputting the first complete data set, the second complete data set and the third complete data set into the model for calculation based on a pre-established LSTM attention neural network model and outputting the prediction results of all indexes.
7. The LSTM attention based stockbreeding index prediction system of claim 6, further comprising a modeling module for building an LSTM attention neural network model, wherein the building of the LSTM attention neural network model comprises:
collecting sample data of livestock in the feeding process;
establishing a neural network model comprising an input layer, an LSTM layer, an Attention layer and an output layer, and initializing the neural network model;
determining a weighting coefficient distribution mechanism of an Attention layer;
and setting an output mechanism of the output layer.
8. A network side server is characterized in that: comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of the method of any one of claims 1-5.
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CN116956747A (en) * | 2023-08-28 | 2023-10-27 | 西湾智慧(广东)信息科技有限公司 | Method for building machine learning modeling platform based on AI (advanced technology attachment) capability |
CN117828373A (en) * | 2024-03-05 | 2024-04-05 | 四川省医学科学院·四川省人民医院 | Missing data filling method and system based on set partitioning and self-supervision learning |
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CN116956747A (en) * | 2023-08-28 | 2023-10-27 | 西湾智慧(广东)信息科技有限公司 | Method for building machine learning modeling platform based on AI (advanced technology attachment) capability |
CN117828373A (en) * | 2024-03-05 | 2024-04-05 | 四川省医学科学院·四川省人民医院 | Missing data filling method and system based on set partitioning and self-supervision learning |
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