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Information Kernel Construction Method Based on Clustering and Multi-Armed Gambler

A technology of a multi-arm gambling machine and a construction method, which is applied in the field of information core construction, can solve the problems of long time for extracting information cores and consume a lot of time, and achieves the effect of improving recommendation accuracy and efficiency.

Active Publication Date: 2022-04-08
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that it takes a lot of time to calculate the fitness of individuals in the population, resulting in too long time for extracting information core

Method used

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  • Information Kernel Construction Method Based on Clustering and Multi-Armed Gambler
  • Information Kernel Construction Method Based on Clustering and Multi-Armed Gambler
  • Information Kernel Construction Method Based on Clustering and Multi-Armed Gambler

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Embodiment Construction

[0041] The embodiments and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] refer to figure 1 , the implementation steps of the present invention are as follows.

[0043] Step 1. Construct user-item rating matrix.

[0044] Extract rating information from the rating data set of user items, denote the ratings of unrated items as 0, and denote the ratings of rated items as corresponding rating values ​​to form the user item rating matrix:

[0045]

[0046] Among them, R represents the user item rating matrix, r ui Indicates the rating of the u-th user on the i-th item, u is from 1 to z, z indicates the number of users in the user-item rating matrix, i is from 1 to n, and n indicates the number of items in the user-item rating matrix.

[0047] In the embodiment of the present invention, the user's rating data set for items includes a MovieLens-100K rating data set, a MovieLens-1M rating data se...

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Abstract

The invention discloses an information kernel construction method based on clustering and a multi-armed gambling machine, which mainly solves the problems of low recommendation accuracy and too long information kernel extraction time in the prior art. ; 2) Reduce the dimensionality of the user item rating matrix to obtain a low-dimensional matrix; 3) repeatedly cluster the users in the low-dimensional matrix; 4) construct a virtual user item rating matrix according to the clustering results; 5) use multi-arm The gaming machine extracts the information core from the virtual user item rating matrix; 6) uses the extracted information core to recommend required items for each user in the user item rating matrix. The invention has the advantages of high recommendation accuracy and fast extraction of information cores, and can be used to recommend required items for users.

Description

technical field [0001] The invention belongs to the field of computer technology, and further relates to a method for constructing an information core, which can be used to recommend items needed by users. Background technique [0002] The recommendation system is an information filtering system that analyzes the user's historical behavior data to help users filter out junk information in massive data and recommend items for users. As the core of the recommendation system, the recommendation algorithm determines the quality and application of the recommendation to a large extent. [0003] In the paper "Uncovering the information core in recommender systems" (Journal on Scientific Reports, 2014) published by Zeng Wei et al., a method for extracting information cores based on heuristic strategies is proposed. The implementation steps of the method are: 1) counting the number of times each user appears in the neighbor list of other users; 2) selecting users with a large number...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q30/02
Inventor 慕彩红刘逸朱贤武刘若辰刘敬吴建设朱虎明侯彪
Owner XIDIAN UNIV
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