Knowledge graph construction method for mathematical tutoring question-answering system, and system thereof

A technology of knowledge graph and question answering system, applied in the field of intelligent teaching, can solve problems such as insufficient support for the query and reasoning of the question answering system for mathematics tutoring, lack of semantic information, etc., and achieve the effect of improving efficiency and knowledge coverage.

Pending Publication Date: 2020-07-31
BOHAI UNIV
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Problems solved by technology

Correspondingly, the lack of semantic information in the knowledge graph is not enough

Method used

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  • Knowledge graph construction method for mathematical tutoring question-answering system, and system thereof
  • Knowledge graph construction method for mathematical tutoring question-answering system, and system thereof
  • Knowledge graph construction method for mathematical tutoring question-answering system, and system thereof

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Embodiment Construction

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0034] Such as figure 1 As shown, the present invention relates to a knowledge map construction method for mathematics tutoring question answering system, which specifically includes the following steps:

[0035] 1. Use web crawler programs to obtain preliminary entities of mathematical knowledge from Baidu Encyclopedia and Chinese Wikipedia.

[0036] 2. Digitalize mathematics textbooks and tutorials, use character matching, TF-IDF algorithm, TextRank algorit...

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Abstract

The invention discloses a knowledge graph construction method for a mathematical tutoring question-answering system, and a system thereof. The knowledge graph construction method comprises the following steps: acquiring a preliminary entity of mathematical knowledge by utilizing a web crawler program; electronizing mathematics teaching materials and tutoring books, employing character matching, aTF-IDF algorithm, a TextRank algorithm and word vector similarity calculation for screening, expanding and aligning of preliminary entities, and forming entities containing mathematical concepts, knowledge points and question types; carrying out the entity classification and entity relationship identification by combining Bi-LSTM with Attention; taking knowledge content, error-prone points, difficulties and tutorials as attributes, and adopting a rule template to extract entity attributes and attribute values; and storing, querying, reasoning and visualizing the mathematical knowledge graph byusing a graph database Neo4j. The invention has the beneficial effects that the construction efficiency and the knowledge coverage rate are improved, and the association between subject knowledge andquestion types, key and difficult points, error-prone points and tutorials is established; the constructed graph not only supports automatic reasoning of mathematical problems, but also supports automatic questioning and answering of mathematical tutoring.

Description

technical field [0001] The invention relates to the field of intelligent teaching, in particular to a method for constructing a knowledge graph and a system thereof for a mathematics tutoring question answering system. Background technique [0002] Knowledge graph is the core key technology to realize automatic question answering and semantic search. The storage method of triples in the knowledge graph provides necessary and rich semantic information for information search and automatic reasoning of the system. Intelligent systems based on knowledge graphs can better implement semantic-based information search and relational reasoning, bringing users a better intelligent experience. At present, knowledge graph has become one of the core technologies for realizing intelligent systems. [0003] In recent years, it has become a new development trend to replace real teachers with question-answering systems to guide students' learning. The mathematics tutoring question and ans...

Claims

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Application Information

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IPC IPC(8): G06F16/332G06F16/36G06F40/289G06F40/30G06F40/211G06N3/04
CPCG06F16/3329G06F16/367G06N3/044
Inventor 马玉慧王琦郭炯
Owner BOHAI UNIV
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