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Method for dynamically updating knowledge graph based on user log

A knowledge map and dynamic update technology, applied in the field of knowledge map, can solve the problems of large amount of data and frequent updates, and achieve the effect of taking into account real needs and reducing the amount of data

Active Publication Date: 2020-01-10
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for dynamically updating the knowledge map based on the user log, which is used to solve the problems existing in the existing knowledge map update in the prior art The problem that entities with large amounts of data and do not need to be updated are frequently updated

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  • Method for dynamically updating knowledge graph based on user log

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Embodiment 1

[0037] combined with figure 1 As shown, a method for dynamically updating knowledge graphs based on user logs, including:

[0038] Step A: Collection of user logs: Obtain the user's request log data in this update cycle from the smart TV semantic log;

[0039] Step B: Extract the entity name and entity type from the user's request statement based on the named entity recognition model. You can use the Bi-LSTM+CRF model (Bi-LSTM: Bi-directional Long Short-Term Memory, bidirectional long-term short-term memory network; CRF :Conditional Random Field, conditional random field) to mark the named entity; traverse the user's request log, and count the visits according to the request category and entity category, and record it as entity set E1,

[0040] E1={(e 1 ,t 1 ,n 11 ),(e 1 ,t 2 ,n 12 ),(e 2 ,t 3 ,n 23 ),..., (e i ,t j ,n ij ),..., (e n ,t m ,n nm )}, where the triplet (e i ,t j ,n ij ) indicates that the entity name is e i and the entity class is t j The num...

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Abstract

The invention discloses a method for dynamically updating a knowledge graph based on a user log. The method comprises the steps of obtaining request log data of a user in a current updating period from a semantic log of a smart television; traversing the request log of the user, and extracting an entity name and an entity type from the request statement of the user based on a named entity identification model; respectively counting the page view according to the request category and the entity category; obtaining a hot entity, a cold entity and a missing entity according to the entity page view and the existing film and television knowledge graph; crawling information of the popular entity and the missing entity from a preset vertical website and carrying out data preprocessing; carrying out entity matching on the obtained popular entities and entities in an existing film and television knowledge graph, and updating matched entities; and newly adding the obtained missing entity to theknowledge graph, and cleaning the cold entity. The method determines and updates entity needing to be updated based on the user log, and can effectively reduce the processed data volume.

Description

technical field [0001] The invention relates to the technical field of knowledge graphs, in particular to a method for dynamically updating knowledge graphs based on user logs. Background technique [0002] Traditional search engines are mainly based on keywords to search for relevant web pages, and then users manually search for useful information from a bunch of candidate web pages. With the rapid development of Internet technology, this traditional search engine has gradually been unable to meet people's needs. People have higher expectations for search. In this context, the knowledge map came into being. It displays complex knowledge fields through data mining, information processing, knowledge measurement and graphic drawing, and describes various entities and concepts that exist in the real world, and Relationships between entities and concepts improve search results. That is, with the passage of time, the entities and relationships in the knowledge graph may change,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/36G06F16/23G06F16/951
CPCG06F16/367G06F16/23G06F16/951
Inventor 唐娟
Owner SICHUAN CHANGHONG ELECTRIC CO LTD