Index keyword extraction method and system based on big geological data

Abstract

The invention relates to an index keyword extraction method and system based on big geological data. The method comprises the following steps of: importing document and performing geological data format conversion, sentence division, word characteristic tagging and position marking; adding a weight coefficient to the segmented document; initially mining and extracting keywords by a keyword mining algorithm; performing weighted operation on the extracted keyword phrases to obtain the comprehensive weight value of each phrase; initially screening according to the sizes of the comprehensive weight values, and reducing the number of the phrases to be determined; matching the phrases with a word library, and finding terms matched with the phrases or relatively-stipulated terms in the word library; performing association degree calculation on the terms and the document, determining the size of the association degree of the terms, and screening again according to the sizes of the association degree; and finally, sequencing the terms according to industrial characteristics, height correlation, features and the like, and determining the order of the keywords. According to the method, file background and relevance can be considered, a vague keyword is abandoned to the greatest extent, the keywords comprehensively reflecting the core content of the document are provided and are sequenced according to a certain logic order, thus, document retrieval is achieved, convenience is provided for the improvement of retrieval efficiency, and the method is a high-efficient index keyword extraction method for the big geological data.

Description

technical field [0001] The invention relates to the technical field of indexing of geological big data, in particular to a method and system for extracting indexing keywords based on geological big data. Background technique [0002] Geological data in my country mainly include geological data, geological literature, geological databases and geological related data from the Internet. The total amount of geological data nationwide is 430,000, of which 128,000 are preserved in the National Geological Archives, covering 32 provinces, municipalities, autonomous regions, and sea areas, involving my country's surrounding areas (countries), polar regions, and oceans, etc., including 1952 Regional geological data and mineral exploration data since the establishment of the National Geological Archives. The National Pavilion currently has 100,000 types of electronic data, about 4 million electronic files, and a total of about 62.59 million electronic data files. The electronic data st...

AI Technical Summary

Problems solved by technology

However, there are several problems that are prone to occur in these two kinds of keywords: first, some authors are not aware of the importance of keyword indexing, and randomly select a few words from the article as keywords, resulting in missing keywords, Indiscriminate labeling; second, some keywords are arranged randomly, regardless of primary and secondary, without hierarchy and logic; third, the keywords provided are selected as keywords without independent retrieval meaning, and lack of understanding of the content of the article. Specificity; the keywords provided in this way, in the retrieval system, make it difficult to find the required accurate information in the database when searching

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