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Rapid character string matching method based on suffix array

A technology of suffix array and matching method, which is used in electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of low search efficiency and achieve the effect of excellent matching speed

Active Publication Date: 2018-11-30
南京搜文信息技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the search efficiency of the existing string matching method based on suffix numbers is not high. A fast string matching method based on a suffix array is proposed, that is, to quickly find the pattern P that appears in the text T frequency

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  • Rapid character string matching method based on suffix array
  • Rapid character string matching method based on suffix array
  • Rapid character string matching method based on suffix array

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Embodiment Construction

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the invention. Obviously, the embodiments described below are only It is a part of the embodiments of the invention, but not all of them. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the invention.

[0036] figure 1 It is a flow chart of the method for quickly matching character strings based on suffix arrays in the present invention.

[0037] The purpose of the present invention is to quickly find the number of occurrences of pattern P in text T, first adopt prior art to set up the suffix array SA about text T, then find the number of times that P appears in suffix array SA, t...

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Abstract

The invention provides a rapid character string matching method based on a suffix array. The method includes two stages, the first stage includes that the appearing position of a pattern string in a text string is limited in a possible interval of the suffix array taking a first character of the pattern string as a beginning character by binary search, and the second stage includes that search conditions are further limited on the interval, suffixes with the length smaller than that of the pattern string and with last characters different from those of the pattern string are excluded, the comparison frequency of the characters is decreased, character string matching range is narrowed, and the appearing position of the pattern string in the text string is rapidly acquired.

Description

technical field [0001] The invention relates to the technical field of natural language processing under the computer technical field. In particular, it relates to a processing method for time information in text. Background technique [0002] String matching, also called pattern matching, is a key technology widely used in information retrieval, intrusion detection, computational biology, search engines, data compression and other fields. The so-called pattern matching problem refers to finding a specific pattern string P=p 1 p 2 …p m In the text string T=t 1 t 2 ...t n All occurrences and times of occurrences in . According to different research fields and research objects, pattern matching problems can be roughly divided into the following four types: exact string matching, extended string matching, regular expression matching and approximate string matching. Suffix array is an ordered integer array, which is a powerful tool in string processing, and is more pract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 路松峰
Owner 南京搜文信息技术有限公司
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