Named entity extraction method and device and medium
A named entity, named entity recognition technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve problems such as confusing subdivision types, and achieve the effect of low overall cost
Pending Publication Date: 2019-04-26
ULTRAPOWER SOFTWARE
View PDF5 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Therefore, it is easy to confuse the subdivision types of multiple similar named entities when using the recognition model trained by the above training samples
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042] Using the recognition model to extract subdivided named entities not only has poor accuracy, but also has the problems of high training cost and low reuse rate of the recognition model. Specifically, training the recognition model requires a large number of training samples, and training samples in the form of "text-organization name-subdivision type" need to manually label corpus according to different extraction tasks and text fields, and construct training samples, which leads to the high cost of model training. At the same time, since each recognition model is trained with targeted training samples according to different extraction tasks and text fields, such recognition models cannot be used for other extraction tasks, nor can they be used to deal with different fields. text, which leads to a low reuse rate of the recognition model.
[0043]To this end, the present application provides a new named entity extraction method, which combines named entity recognition m...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The embodiment of the invention discloses a named entity extraction method and device and a computer readable storage medium. The method comprises the following steps: identifying a first named entityfrom a to-be-extracted text by utilizing a named entity identification model; Obtaining an extraction rule, the extraction rule comprising a positioning expression and an extraction expression, and the extraction rule corresponding to a preset subdivision type of the named entity; Determining an effective extraction area in the text by utilizing the positioning expression, wherein the effective extraction area comprises a first named entity; Extracting a second named entity from the effective extraction area; Wherein the second named entity is a character string matched with the extraction expression, and the subdivision type of the second named entity is a subdivision type corresponding to the extraction rule. By adopting the method in the technical scheme, the named entity of the subdivision type can be extracted from the text more accurately, and the named entity recognition model with higher universality can be adopted, so that the cost required for completing the extraction taskis reduced.
Description
technical field [0001] The invention relates to the fields of information extraction and text mining, in particular to a named entity extraction method. In addition, the invention also relates to a named entity extraction device and medium. Background technique [0002] Named entities generally refer to person names, organization names, place names, and all other entities identified by names. More broadly, named entities also include numbers, dates, and currencies. The types of named entities can be defined according to the problem. For example, in an existing definition, named entities can include three categories: entity class, time class and value class. Among them, the entity category includes names of people, places, and institutions; the time category includes dates, time, etc.; the value category includes currency, weights and measures, percentages, etc. Named entities occupy an important position in many application fields such as information extraction, question a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/27
CPCG06F40/295
Inventor 吴云鹤李德彦
Owner ULTRAPOWER SOFTWARE