CN108647364A - A kind of prediction recommendation method based on mobile terminal application data - Google Patents

A kind of prediction recommendation method based on mobile terminal application data Download PDF

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CN108647364A
CN108647364A CN201810490042.6A CN201810490042A CN108647364A CN 108647364 A CN108647364 A CN 108647364A CN 201810490042 A CN201810490042 A CN 201810490042A CN 108647364 A CN108647364 A CN 108647364A
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mobile terminal
matrix
word
prediction
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CN108647364B (en
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韩石
韩一石
刘山彪
程家豪
胡纪坤
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Guangdong University of Technology
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Guangdong University of Technology
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Abstract

The invention discloses a kind of, and method is recommended in the prediction based on mobile terminal application data, the present invention uses mobile terminal application data update and supplement user property according to user, in conjunction with the advantages of topic model and mixing collaborative filtering prediction technique, the accuracy of recommendation is improved while in view of user individual, and the present invention can obtain the recessive preference of user according to user installation mobile terminal applicable cases, and the accuracy predicted using user's recessiveness preference is higher than the accuracy of the collaborative filtering based on user and the collaborative filtering based on article.

Description

A kind of prediction recommendation method based on mobile terminal application data
Technical field
The present invention relates to mobile Internet fields, more particularly, to a kind of prediction based on mobile terminal application data Recommendation method.
Background technology
Currently, mobile network user is creating and is sharing large scale network information, such as article of text, photo, video, It is the important clue for excavating userspersonal information, individual subscriber essential information includes gender, the age, personal interest (for example, Science and technology, amusement, sport), personal profession information (for example, researcher, student, software engineer, musician), personal orientation of emotion (for example, optimistic, passive) etc..Our these personal information are referred to as user property.It is inferred to from users personal data User property can play an important role in many aspects such as customer analysis, information retrieval, personalized recommendations.
User network behavioral data (webpage click amount, web page access duration etc.), service behavior data are currently mainly used (webpage stay time, web page access depth etc.), user preference data (browsing/collection, comment content, life-form structure preference Deng), user's buying behavior data (repurchase rate, the rates such as user's contribution) predict user property.But it is directed to network behavior Classification prediction cannot all reach ideal effect, the accuracy rate of prediction remains unchanged not high.Recommend application only to user using store Application more than recommended user's quantity, does not account for user property and users ' individualized requirement.
Invention content
The present invention is the defect overcome described in the above-mentioned prior art, further promotes the accurate of network behavior classification prediction Rate provides a kind of prediction recommendation method based on mobile terminal application data.
In order to solve the above technical problems, technical scheme is as follows:
A kind of prediction recommendation method based on mobile terminal application data, includes the following steps:
S1. the initial data of acquisition customer mobile terminal application, cleans initial data, obtains mobile terminal application Data;
S2. it crawls mobile terminal and applies store data, calculate the word each applied and be biased to;
S3. data are biased to according to the word that step S2 is obtained, calculate the recessive preference matrix of user;
S4. according to the recessive preference matrix of the obtained users of step S3, user's recessiveness matrix is calculated, builds user property meter Calculate model;
S5. part is taken to predict user property with whole collaborative filtering;
S6. the prediction user property obtained according to step S5 is updated or supplements to original user information, using pushing away It is that user recommends personalized application to recommend system.
Preferably, the step S1 is as follows:
S11. user's characteristic information is counted according to User ID, is distributed by each feature in the information of statistics unique Digital ID;
S12. the exceptional value in user information is deleted;
S13. choose related coefficient often occurring, calculating feature and user property from treated data, extraction with The big feature of user property related coefficient, removal and the small feature of user property related coefficient;
S14. counting user clicks the number of mobile terminal application, and user preference matrix is calculated by normalizing formula Cn×m
Preferably, the step S2 is as follows:
S21. it uses crawler capturing mobile phone to apply the application data in store, passes through natural language processing method, processing movement Terminal applies word simultaneously distributes unique number ID;
S22. it converts using word vector w=(w the word of mobile terminal application description information to1,w2...wn), In, wnIndicate n-th of the word occurred;
S23. all mobile terminal application vectors are combined the-word Matrix C that is appliedm×l, Matrix Cm×lIn include The be described word of application, Matrix Cm×lIn value be 0 or 1;
S24. it uses TF-IDF algorithms to calculate the word each applied to be biased to, and TF-IDF values is replaced into application-word matrix Value, obtain updated application-word Matrix Cm×l
Preferably, the step S3 is as follows:
S31. according to Matrix Cn×mAnd Cm×lMultiplication obtains user-word Matrix Cn×l
Preferably, the step S4 is as follows:
S41. user-word Matrix C is handled according to LDA topic modelsn×l, obtain user's latent subject Matrix Cn×tWith theme- Word preference matrix Ct×l
S42. according to Matrix Cn×tObtain user property CkWith the relationship between theme topic;
S43. known users attribute C is obtained according to NB Algorithmk, by formula P (topic | ck) obtain preference master Inscribe topic;
S44. P (c are calculated according to NB Algorithmk| topic), the maximum P (c of select probabilityk| topic) value As user property calculated value.
Preferably, the step S5 is as follows:
S51. improved Pearson came similarity ρ is utilizedu'vNeighbours' similarity calculating method, according to theme-word Matrix Ct×l Calculate N number of neighbours and the user-theme Matrix C of themen×tCalculate the M neighbours of user;
S52. it calculates the collaborative filtering based on theme and obtains value uu,iWith the collaborative filtering value based on user wu,i
S53. it according to mixing collaborative filtering prediction algorithm, obtains following formula and calculates user property prediction result:
qu,i=α uu,i+(1-α)wu,i
Wherein, qu,iFor predicted value, α is coefficient of balance.
Preferably, the step S6 is as follows:
S61. user information is updated or supplemented according to the user property prediction result that step S53 is obtained;
S62. user property prediction result and user property are combined, commending system is that user recommends personalized mobile end End application.
Compared with prior art, the advantageous effect of technical solution of the present invention is:
The present invention is by analyzing customer mobile terminal application data prediction user property, in conjunction with commending system, in view of Improve the accuracy of recommendation while user individual, and the present invention can be with according to user installation mobile terminal applicable cases The recessive preference of user is obtained, is increased significantly to prediction result accuracy using user's recessiveness preference prediction user property.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Obtain other attached drawings according to these attached drawings.
Fig. 1 is that method schematic diagram is recommended in the prediction based on mobile terminal application data.
Specific implementation mode
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent;
To those skilled in the art, it is to be appreciated that certain known features and its explanation, which may be omitted, in attached drawing 's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
A kind of prediction recommendation method based on mobile terminal application data, includes the following steps:
S1. the initial data of acquisition customer mobile terminal application, cleans initial data, obtains mobile terminal application Data;
S2. it crawls mobile terminal and applies store data, calculate the word each applied and be biased to;
S3. data are biased to according to the word that step S2 is obtained, calculate the recessive preference matrix of user;
S4. according to the recessive preference matrix of the obtained users of step S3, user's recessiveness matrix is calculated, builds user property meter Calculate model;
S5. part is taken to predict user property with whole collaborative filtering;
S6. the prediction user property obtained according to step S5 is updated or supplements to original user information, using pushing away It is that user recommends personalized application to recommend system.
In the present embodiment, step S1 is as follows:
S11. user's characteristic information is counted according to User ID, is distributed by each feature in the information of statistics unique Digital ID;
S12. the exceptional value in user information is deleted;
S13. choose related coefficient often occurring, calculating feature and user property from treated data, extraction with The big feature of user property related coefficient, removal and the small feature of user property related coefficient;
S14. counting user clicks the number of mobile terminal application, and user preference matrix is calculated by normalizing formula Cn×m
In the present embodiment, step S2 is as follows:
S21. it uses crawler capturing mobile phone to apply the application data in store, passes through natural language processing method, processing movement Terminal applies word simultaneously distributes unique number ID;
S22. it converts using word vector w=(w the word of mobile terminal application description information to1,w2...wn), In, wnIndicate n-th of the word occurred;
S23. all mobile terminal application vectors are combined the-word Matrix C that is appliedm×l, Matrix Cm×lIn include The be described word of application, Matrix Cm×lIn value be 0 or 1;
S24. it uses TF-IDF algorithms to calculate the word each applied to be biased to, and TF-IDF values is replaced into application-word matrix Value, obtain updated application-word Matrix Cm×l
In the present embodiment, step S3 is as follows:
S31. according to Matrix Cn×mAnd Cm×lMultiplication obtains user-word Matrix Cn×l
In the present embodiment, step S4 is as follows:
S41. user-word Matrix C is handled according to LDA topic modelsn×l, obtain user's latent subject Matrix Cn×tWith theme- Word preference matrix Ct×l
S42. according to Matrix Cn×tObtain user property CkWith the relationship between theme topic;
S43. known users attribute C is obtained according to NB Algorithmk, by formula P (topic | ck) obtain preference master Inscribe topic;
S44. P (c are calculated according to NB Algorithmk| topic), the maximum P (c of select probabilityk| topic) value As user property calculated value.
In the present embodiment, step S5 is as follows:
S51. improved Pearson came similarity ρ is utilizedu'vNeighbours' similarity calculating method, according to theme-word Matrix Ct×l Calculate N number of neighbours and the user-theme Matrix C of themen×tCalculate the M neighbours of user;
S52. it calculates the collaborative filtering based on theme and obtains value uu,iWith the collaborative filtering value based on user wu,i
S53. it according to mixing collaborative filtering prediction algorithm, obtains following formula and calculates user property prediction result:
qu,i=α uu,i+(1-α)wu,i
Wherein, qu,iFor predicted value, α is coefficient of balance.
In the present embodiment, step S6 is as follows:
S61. user information is updated or supplemented according to the user property prediction result that step S53 is obtained;
S62. user property prediction result and user property are combined, commending system is that user recommends personalized mobile end End application.
The concrete principle of the above method is as follows:
In the present invention program, as shown in Figure 1, obtaining user preference matrix first, acquisition customer mobile terminal is applied Initial data cleans initial data, obtains the mobile terminal application data that can be used, according to User ID by user's point The mobile phone hit is applied into statistics, and each unique number ID of mobile phone application distribution deletes the exceptional value in user property. In specific implementation process, number normalization will click on.A bit using user's mobile phone of click as preference increase, frequent to click It can be considered as and like the mobile phone application, user is built into key-value pair to the preference degree of each application, is finally converted into user's Have a preference for matrix, the value of matrix corresponds to preference.
Mobile terminal application message is obtained using reptile, information is acquired using breadth-first strategy.It is answered collected Natural language processing is carried out with information, extracts the word weight of each mobile terminal application.Mobile terminal is applied to each list The unique number ID of word distribution, the word during mobile terminal is applied build key-value pair, and a mobile terminal application correspondence is multiple Word, is converted into the vector of mobile terminal application, and vectorial value corresponds to respective weight.Mobile terminal application Vector Groups are closed Come, forms the sparse application-word matrix of a higher-dimension.
In conjunction with user preference matrix and application-word matrix, user-word matrix is calculated.User preference matrix column number and It is identical using-word matrix line number, each record of user preference matrix represents the preference that user applies mobile terminal Distribution represents the tendency degree of word in mobile phone application using each record of-word matrix, two matrixes is combined, Obtain tendency degree of the user to word.
User-word matrix is handled according to LDA topic models, obtains user-latent subject matrix and latent subject-word square Battle array.User-theme matrix representative user is more deep close to user demand, theme-word square to the preference of certain class application theme Battle array represents each theme and is made of which word.User property C is obtained according to user-theme matrixkWith the pass between theme topic System.
NB Algorithm obtains known users attribute Ck, the calculation formula of preference theme topic be P (topic | ck); P (c are calculated according to NB Algorithmk| topic), the maximum P (c of select probabilityk| topic) value is as user property Calculated value.
It takes part to predict user property with whole collaborative filtering, the N number of of theme is calculated according to theme-word matrix Neighbours calculate the collaborative filtering based on theme and obtain value uu,i.The M neighbours of user are calculated according to user-theme matrix, It calculates the collaborative filtering based on user and obtains value wu,i.Predicted value q is calculated using mixing collaborative filtering prediction algorithmu,i, add Enter coefficient of balance α, obtains predictor formula qu,i=α uu,i+(1-α)wu,i
Original user information is updated or supplemented according to the user property of prediction, the use of commending system is that user recommends individual character Change application.
In conclusion the present invention usage behavior information applied according to customer mobile terminal predicts user property, it will be pre- The user property of survey is updated and supplements to legacy data, while mixing collaborative filtering prediction algorithm proposed by the present invention, The accuracy of prediction is improved while consideration user individual.
Wherein user property prediction technique extracts the recessive information of user using LDA topic models, recessive partially using user Prediction user property increases significantly to prediction result accuracy well.
Wherein mixing collaborative filtering prediction algorithm has used the collaborative filtering based on user and based on theme, in conjunction with two The advantages of kind algorithm, that is, the individual operation of user is considered, and improve the accuracy of prediction.
The shortcomings that being wherein directed to Pearson came calculating formula of similarity, proposes improved Pearson came calculating formula of similarity, Formula can more calculate accurate result after improvement.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention Protection domain within.

Claims (7)

1. method is recommended in a kind of prediction based on mobile terminal application data, which is characterized in that include the following steps:
S1. the initial data of acquisition customer mobile terminal application, cleans initial data, obtains mobile terminal application number According to;
S2. it crawls mobile terminal and applies store data, calculate the word each applied and be biased to;
S3. data are biased to according to the word that step S2 is obtained, calculate the recessive preference matrix of user;
S4. according to the recessive preference matrix of the obtained users of step S3, user's recessiveness matrix is calculated, structure user property calculates mould Type;
S5. part is taken to predict user property with whole collaborative filtering;
S6. the prediction user property obtained according to step S5 is updated or supplements to original user information, is using recommendation System is that user recommends personalized application.
2. method is recommended in the prediction according to claim 1 based on mobile terminal application data, which is characterized in that the step Rapid S1 is as follows:
S11. user's characteristic information is counted according to User ID, by each unique number of feature distribution in the information of statistics Word ID;
S12. the exceptional value in user information is deleted;
S13. related coefficient often occurring, calculating feature and user property, extraction and user are chosen from treated data The big feature of attribute related coefficient, removal and the small feature of user property related coefficient;
S14. counting user clicks the number of mobile terminal application, and user preference Matrix C is calculated by normalizing formulan×m
3. method is recommended in the prediction according to claim 1 based on mobile terminal application data, which is characterized in that the step Rapid S2 is as follows:
S21. it uses crawler capturing mobile phone to apply the application data in store, by natural language processing method, handles mobile terminal Using word and distribute unique number ID;
S22. it converts using word vector w=(w the word of mobile terminal application description information to1,w2...wn), wherein wnTable N-th existing of word is shown;
S23. all mobile terminal application vectors are combined the-word Matrix C that is appliedm×l, Matrix Cm×lIn comprising application Be described word, Matrix Cm×lIn value be 0 or 1;
S24. it uses TF-IDF algorithms to calculate the word each applied to be biased to, and TF-IDF values is replaced to the value of application-word matrix, Obtain updated application-word Matrix Cm×l
4. method is recommended in the prediction according to claim 1 based on mobile terminal application data, which is characterized in that the step Rapid S3 is as follows:
S31. according to Matrix Cn×mAnd Cm×lMultiplication obtains user-word Matrix Cn×l
5. method is recommended in the prediction according to claim 1 based on mobile terminal application data, which is characterized in that the step Rapid S4 is as follows:
S41. user-word Matrix C is handled according to LDA topic modelsn×l, obtain user's latent subject Matrix Cn×tIt is inclined with theme-word Good Matrix Ct×l
S42. according to Matrix Cn×tObtain user property CkWith the relationship between theme topic;
S43. known users attribute C is obtained according to NB Algorithmk, by formula P (topic | ck) obtain preference theme topic;
S44. P (c are calculated according to NB Algorithmk| topic), the maximum P (c of select probabilityk| topic) value conduct User property calculated value.
6. method is recommended in the prediction according to claim 1 based on mobile terminal application data, which is characterized in that the step Rapid S5 is as follows:
S51. improved Pearson came similarity ρ is utilizedu'vNeighbours' similarity calculating method, according to theme-word Matrix Ct×lIt calculates N number of neighbours of theme and user-theme Matrix Cn×tCalculate the M neighbours of user;
S52. it calculates the collaborative filtering based on theme and obtains value uu,iValue w is obtained with the collaborative filtering based on useru,i
S53. it according to mixing collaborative filtering prediction algorithm, obtains following formula and calculates user property prediction result:
qu,i=α uu,i+(1-α)wu,i
Wherein, qu,iFor predicted value, α is coefficient of balance.
7. method is recommended in the prediction according to claim 1 based on mobile terminal application data, which is characterized in that the step Rapid S6 is as follows:
S61. user information is updated or supplemented according to the user property prediction result that step S53 is obtained;
S62. user property prediction result and user property are combined, commending system is that user recommends personalized mobile terminal to answer With.
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