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Recommender Search Method Based on Kernel Search Strategy in Recommender System

A recommendation system and search strategy technology, applied in other database indexing, other database retrieval, digital data information retrieval and other directions, can solve problems such as heavy calculation, and achieve the effect of high coverage

Active Publication Date: 2020-08-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This algorithm suffers from heavy computation as they need to search all user profiles to find the best set of neighbors [2，4，5]

Method used

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  • Recommender Search Method Based on Kernel Search Strategy in Recommender System
  • Recommender Search Method Based on Kernel Search Strategy in Recommender System
  • Recommender Search Method Based on Kernel Search Strategy in Recommender System

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Embodiment Construction

[0039] The invention will be described in further detail below.

[0040]With the rapid development of the Internet, the speed of information growth is accelerating, and the problem of online user information overload is becoming more and more serious. Recommender system technology is currently used in many application domains, and it is widely used in social media to find useful information. Based on user preferences, recommender systems can suggest items of interest to users. Such preferences may be retrieved explicitly or implicitly. Currently, there are two commonly used recommendation techniques, content-based models and collaborative filtering methods. However, in content-based recommender systems, the cold-start problem is acute because the ratings of new users are not available. The computational complexity of collaborative filtering methods is high because they need to search all user profiles to find the best set of neighbors. The present invention considers the t...

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Abstract

The invention relates to a search strategy of a trust network recommendation and search mechanism, and belongs to the application field of recommendation systems. According to the search strategy, important nodes in a network are selected and used as kernels; through trust transfer, users trusted by the nodes can be found; and through carrying out transfer for several times, the most part of users in the network are covered. By utilizing two centrality measurements such as node degree and node betweenness, the relatively important nodes in the network can be respectively obtained; and the kernels can be formed by the center nodes. Through the trust transfer in the network, diffusion is carried out outwards from the kernels, and the most part of the nodes in the network can be covered generally after several times. The final coverage fractions of the kernels found by utilizing different centrality measurements are different. In order to obtain better effect, the two methods of the node degree and the node betweenness are combined.

Description

[0001] The invention relates to a recommender search method based on a kernel search strategy in a recommender system, belonging to the application field of the recommender system. Background technique [0002] With the rapid development of the Internet, information is increasing at an unprecedented rate, making the problem of information overload of online users intensified. Recommender systems can be defined as information filtering systems, as they aim to provide users with the most suitable items consistent with user preferences and interests, they have gained a lot of attention in social networking applications [1] . Recommender systems are used in various applications, including recommending products, social links, and digital items. With the rapid growth of information available on the web, it is necessary to use tools to filter this information in order to find items that are more likely to be of interest to users. Recommender systems are introduced to solve the prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/9536G06F16/901
CPCG06F16/9024G06F16/9535
Inventor 袁伟伟周丽何康亚
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS