Method and device for extracting military scenario text event information based on secondary decoding
A technology of event information and secondary decoding, applied in unstructured text data retrieval, text database clustering/classification, instruments, etc. Limitation and other issues, to achieve the effect of good portability and flexibility, high degree of matching, saving time and labor costs
Active Publication Date: 2022-03-22
NAT UNIV OF DEFENSE TECH
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[0005] The purpose of the present invention is to overcome the defects of the prior art, and propose a method and device for extracting military scenario text event information based on secondary decoding, so as to solve the problem of using machine tools when the corpus scale is limited and the corpus scale of various types of events is unbalanced. The problem of wrong match between event trigger words and event elements when the learning model performs a decoding can improve the accuracy of event extraction
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[0048] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
[0049] Refer to attached figure 1 , showing a schematic flow diagram of an embodiment of the military scenario text event information extraction method based on secondary decoding of the present invention, specifically comprising the following steps:
[0050] A: Preprocessing, input the military scenario text corpus, rely on jieba, Hanlp and other open source word segmenters with built-in dictionaries, build a professional dictionary, sequentially segment the mili...
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The present invention provides a method and device for extracting military scenario text event information based on secondary decoding. The method includes: 1. Preprocessing, by constructing a professional dictionary, sentence segmentation, and word segmentation processing, to obtain a data set represented by a word sequence ;2. Corpus labeling, by defining the structural semantics of 9 types of events in the military scenario text, formulating corpus labeling methods and rules, manually labeling the corpus, and obtaining training sets and test sets; 3. Model training, using the training set to machine learning Model encoding to obtain event extraction parameters; 4. Information extraction, input test set, use a specific algorithm to perform a decoding to obtain the event trigger word extraction sequence, and then adaptively call different event element extraction parameters based on the trigger word extraction results for secondary decoding , to get the event element extraction sequence. The invention solves the problem of wrong match between event trigger words and event elements in the primary decoding extraction method, and improves the accuracy of event information extraction.
Description
technical field [0001] The invention belongs to the technical field of natural language processing, in particular to a method and device for extracting military scenario text event information based on secondary decoding. Background technique [0002] The military scenario text is a descriptive text that is conceived and assumed according to the attempts, situations, and combat process scenarios of both combatants. Event information extraction is an important branch of natural language processing technology. Event extraction technology can extract key information that people are interested in from a large number of natural language texts, including event type, event subject, event time, event location, and event object. Wait. Therefore, the use of event extraction technology can enable military personnel to accurately obtain key information of interest from a large number of irregular and random military scenario texts. [0003] Traditional event extraction methods mainly ...
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IPC IPC(8): G06F16/35G06F40/289G06F40/216G06F40/242G06N20/20
CPCG06F16/35G06N20/20
Inventor 刘乾杨若鹏蒋序平卢稳新鲁云军鲁义威战立莹
Owner NAT UNIV OF DEFENSE TECH