Mathematical expression similar distance measurement method

A technique of mathematical expressions and similarity distance, applied in the field of mathematical information retrieval, which can solve the problem that the sorting results of expressions cannot well meet the needs of users.

Active Publication Date: 2016-09-28
HEBEI UNIVERSITY
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Problems solved by technology

[0019] The purpose of the present invention is to provide a method for measuring the similarity distance of mathematical expressions to solve the problem in the prior art that the expression sorting results finally obtained when retrieving mathematical expressions cannot well meet the needs of users

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  • Mathematical expression similar distance measurement method
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Embodiment Construction

[0074] The present invention is completed by the National Natural Science Foundation of China (project approval number: 61375075). The method for measuring the similarity distance of mathematical expressions proposed by the present invention mainly includes four parts: compatible matching of mathematical expressions, analysis of mathematical expressions, calculation of hesitant membership degree and measurement of similarity distance.

[0075] Combine below figure 1 The method flow chart of the present invention describes in detail the specific steps of the method for measuring the similarity distance of mathematical expressions provided by the present invention.

[0076] a. Compatible matching of mathematical expressions.

[0077] Through the mathematical retrieval system (corresponding to figure 1 Mathematical expression data set, or database) to user query mathematical expression (that is, the mathematical expression to be queried, referred to as query expression) ME q P...

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Abstract

The invention provides a mathematical expression similar distance measurement method. The method comprises the following steps of performing compatibility retrieval on query expressions in a database to obtain a plurality of result expressions; analyzing the query expressions, replacing the query expressions in the result expressions with unified identifiers ''\replace'', and analyzing the result expressions after replacement; constructing a hesitant fuzzy set corresponding to each expression according to an analytic result of the expression; and calculating a similar distance and similarity between the result expression and the query expression according to the constructed hesitant fuzzy set. Through the method provided by the invention, the sorting of mathematical expression search result sets is closer to the query expression, so that an arrangement sequence of retrieval results seen by users can better reflect demand degrees of the users to the results. The method is funded by the national natural science foundation (a project approval number: 61375075).

Description

technical field [0001] The invention relates to the field of mathematical information retrieval, in particular to a method for measuring similar distances of mathematical expressions. Background technique [0002] With the popularization and development of information technology, the proportion of scientific and technological information in networks and databases is increasing day by day, and the number of key components—mathematical expressions is increasing; at the same time, people obtain scientific and technological information from the Internet based on mathematical content demand is also increasing. Mathematical expressions have the characteristics different from ordinary texts, such as a wide variety of symbols, two-dimensional distribution, complex operation structure, and flexible syntax and semantics. This makes the retrieval of mathematical content, especially mathematical expressions, a major focus of the development of information retrieval technology and searc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/2462G06F16/2468
Inventor 田学东张凯歌周南张植明
Owner HEBEI UNIVERSITY
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