Dependency syntax-based similarity calculation model and system and system building method

A technology of similarity calculation and dependent syntax, applied in the field of question answering systems involving knowledge graphs, can solve problems such as poor question answering performance of knowledge graphs, and achieve the effect of improving performance

Inactive Publication Date: 2021-02-12
SUZHOU UNIV
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Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention is to overcome the problem of poor performance of knowledge graph question answering in the prior art, th...

Method used

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  • Dependency syntax-based similarity calculation model and system and system building method
  • Dependency syntax-based similarity calculation model and system and system building method
  • Dependency syntax-based similarity calculation model and system and system building method

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Embodiment 1

[0024] like figure 2 As shown, this embodiment provides a similarity calculation model based on dependency syntax, including: question semantic coding, which includes shortest dependency path syntax coding, syntax tree-based expression, and pre-trained word vector semantics Encoding; the semantic encoding of the candidate query graph corresponding to the question sentence is used to obtain the semantic encoding of the query graph through semantic encoding of the answer query graph; the semantic encoding of the pre-trained word vector, the syntax encoding of the shortest dependency path, and the expression based on the syntax tree are performed Splicing to obtain the semantic code of the question sentence; the mutual attention mechanism is used for the semantic code of the query graph and the semantic code of the question sentence, information interaction is carried out, and the semantic similarity is obtained through similarity calculation.

[0025] The similarity calculation...

Embodiment 2

[0045] This embodiment provides a system, including the dependency syntax-based similarity calculation model described in Embodiment 1.

[0046] Since the system described in the present embodiment includes the dependency syntax-based similarity calculation model described in the first embodiment, all the advantages of the first embodiment also have all the advantages of the present embodiment.

Embodiment 3

[0048] This embodiment provides a method for building a system, which is used to build the system described in Embodiment 2, including: Step S1: After preprocessing the questions, identify the subject entity of the questions from the questions; Step S2: According to the identified subject entity, construct the one-hop triplet and two-hop triplet of the subject entity; Step S3: Extract the time information and order information of the question sentence, and add the time information and order information to a In jump triplets and double jump triplets, complete the construction of each candidate query graph of the question sentence; step S4: input the query sentence and all query graphs corresponding to the question sentence into the knowledge graph question answering system, and complete the question sentence Calculate the similarity score of its corresponding query graph, select the query graph with the highest score as the optimal query graph corresponding to the question sen...

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Abstract

The invention relates to a dependency syntax-based similarity calculation model and system and a system building method, and the method comprises the steps of coding question semantics which comprisesshortest dependency path syntax coding, syntax tree-based expression and pre-trained word vector semantic coding; performing semantic coding on candidate query graphs corresponding to the questions so that answer query graphs are coded by pre-training word vectors to obtain query graph semantic codes; splicing pre-trained word vector semantic codes, shortest dependency path syntax codes and expression based on a syntax tree to obtain a question dependency syntax; and performing a mutual attention mechanism on the query graph semantic code and the question dependency syntax, performing information interaction, and performing similarity calculation to obtain semantic similarity. The performance of the system can be improved.

Description

technical field [0001] The present invention relates to the technical field of knowledge graph question answering systems, in particular to a similarity calculation model and system based on dependency syntax and a method for building the system. Background technique [0002] The implementation methods of Knowledge Graph Question Answering System (KBQA) are mainly divided into two categories: retrieval-based methods and semantic parsing-based methods. [0003] The retrieval-based method is as follows: firstly, entity recognition and entity link processing are performed on the question sentences, and sequence labeling models are mostly used in this part at the present stage. Through these two steps, the subject entity candidates of the questions will be obtained, and then the candidate predicates corresponding to the subject entities will be determined. The similarity model and the question classification model are used more in this part. However, due to the complexity of Ch...

Claims

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Application Information

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IPC IPC(8): G06F16/33G06F16/332G06F16/335G06F40/279G06N3/08
CPCG06N3/08G06F16/3329G06F16/3344G06F16/335G06F40/279
Inventor 陈文亮张鹏举
Owner SUZHOU UNIV
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