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Automatic construction method for hierarchical structure of domain concepts

A concept-level, automatic construction technology, applied in the fields of instrumentation, computing, electrical digital data processing, etc., can solve problems such as the knowledge base does not cover the domain concepts, the efficiency of the automatic construction algorithm of the concept hierarchy is limited, and the extraction of domain concepts is difficult.

Inactive Publication Date: 2014-08-27
EAST CHINA NORMAL UNIVERSITY
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Problems solved by technology

Existing research mainly has the following problems: (1) domain concept extraction is difficult, and domain concepts contain many unregistered words (new words or compound words), which increases the difficulty of domain concept extraction; (2) the relationship between domain concepts is extracted accurately The existing knowledge base does not cover the relationship between domain concepts; (3) The efficiency of the automatic construction algorithm of the concept hierarchy is limited: most of the existing methods are based on clustering algorithms, and these methods can only reflect the hierarchical categories of concepts, but cannot Nice representation of inter-concept relationship hierarchies

Method used

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  • Automatic construction method for hierarchical structure of domain concepts
  • Automatic construction method for hierarchical structure of domain concepts
  • Automatic construction method for hierarchical structure of domain concepts

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Embodiment

[0094] figure 1 A flow chart of the automatic construction of the domain concept hierarchy provided by the present invention is shown.

[0095] First, the documents and concepts in the mobile domain are captured from other websites such as Datatang and Baidu Baike. As the domain document collection domain concept set, the data is completely unstructured.

[0096] Steps S101 and S102 are respectively based on the syntax tree and based on the rules to identify the relationship between the domain concepts, the specific process is as follows: figure 2 shown. First, the domain corpus is obtained through the domain concepts and domain documents; then the corresponding concept relationships are obtained by matching according to the established rules; then the syntactic analysis of the domain concept sentences is performed to obtain the upper and lower and overall part relationships; finally, each obtained relationship is expressed as (Concept 1, Relation, Concept 2) form represen...

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Abstract

The invention discloses an automatic construction method for a hierarchical structure of domain concepts. The automatic construction method includes that extracting the relationship between domain concepts; constructing a relationship matrix according to the concurrence frequency of the domain concepts and the relationship between the domain concepts; clustering the domain concepts through a fusion clustering algorithm to obtain a stable concept cluster; fusing the cluster through a BRT-Guass algorithm to obtain the hierarchical structure of the domain concepts. The automatic construction method for the hierarchical structure of the domain concepts enables the hierarchical structure construction time complexity to be lowered, is capable of obtaining a comprehensive domain concept word set, and has ideal accuracy rate and recall rate.

Description

technical field [0001] The invention relates to the technical field of natural language processing, in particular to a method for automatically constructing a domain concept hierarchy. Background technique [0002] Domain concept is an abstract description of domain objects in the process of human cognition, and it is a form of expression of domain knowledge in text, and forms an independent knowledge unit with the development and change of the domain. The research on automatic construction technology of domain concept hierarchy is how to use computer to automatically extract domain concepts and the relationship between concepts from domain texts, and further organize domain concepts to form a hierarchical structure according to the relationship. Domain concept hierarchy plays an important role in artificial intelligence, natural language processing and information retrieval and other application fields, and it is of great significance to realize the automatic construction o...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 吕钊何立群
Owner EAST CHINA NORMAL UNIVERSITY