Intelligent Chinese request-answering system based on concept

Abstract

The invention discloses a Chinese question answering system based on concept, which mainly comprises a data server, a question pre-treatment module, a candidate question set extracting module and a question sentence similarity calculation module. The invention aims at providing a question answering system which is based on concept, can carry out synonym expansion of keywords which are processed by question sentences which are input by the user, understand question sentences better, carry out searching and improve the recall ratio of the question answering system. Furthermore, the system has a Chinese sentence similarity calculation method based on concept from three aspects: word form, word order and word length, and improves searching precision ratio. Meanwhile, the system adopts a high-efficiency retrieval technology to realize rapid extraction of candidate question set, calculates question sentence similarity, sorts question set quickly and returns the sorted questions and answers to the user. The question answering system of the invention gives more precise understanding in concept to the question sentences input by the user and searches the accurate answers. Experiments show that the question answering system of the invention achieves high recall ratio and precision ratio.

Description

technical field [0001] The invention belongs to information retrieval technology, specifically a concept-based question-and-answer retrieval system. The question answering system is an improvement to the information retrieval system, and it is an advanced form of information retrieval. It can answer users' questions in natural language with precise and concise language. Background technique [0002] In the 21st century, people have officially entered the information age, and the demand for network information is increasing day by day. However, the inherent large capacity, heterogeneity, distribution and dynamics of the network, as well as a large amount of invalid data lacking organization in the Web, reduce the efficiency of people's utilization of rich information resources, and the phenomenon of "information overload" appears. In recent years, with the rapid development of network and information technology, people's desire to obtain information faster has promoted the ...

AI Technical Summary

Problems solved by technology

But on the whole, there are relatively few scientific research institutions involved in the research of Chinese automatic question answering technology, and there is basically no Chinese natural language question answering system

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