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Missing data filling method and device based on density

A technology of missing data and density, applied in the computer field, can solve problems such as low accuracy and small application range, and achieve the effect of improving accuracy

Active Publication Date: 2018-06-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for filling missing data based on density, which solves the technical problems of small application range and low accuracy of the data filling method in the prior art

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  • Missing data filling method and device based on density
  • Missing data filling method and device based on density
  • Missing data filling method and device based on density

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Embodiment Construction

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0032] figure 1 It is a schematic diagram of a density-based missing data filling method according to an embodiment of the present invention, such as figure 1 As shown, the embodiment of the present invention provides a method for filling missing data based on density, including:

[0033] Step S10, obtaining a set of candidate filling att...

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Abstract

The invention provides a missing data filling method and device based on density. The method includes: acquiring a candidate filling attribute set which comprises a plurality of candidate filling attributes for filling the missing attributes of a missing tuple; selecting one candidate filling attribute meeting a preset condition from the candidate filling attribute set to serve as the final filling value of the missing tuple, wherein the preset condition allows the number of complete tuples with the distance to the filled missing tuple being smaller than first preset distance to be maximum. The missing data filling method and device has the advantages that the candidate filling attribute set is built, the candidate filling attribute meeting the preset condition is selected as the final filling value of the missing tuple, the candidate filling attribute with the maximum neighbor density is selected as the final filling result to allow the number of the adjacent tuples of the missing tuple to the maximum, error filling is avoided, and filling accuracy is further increased.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for filling missing data based on density. Background technique [0002] With the rapid development of the Internet and mobile Internet, the total amount of data generated by people shows a trend of rapid growth. As the amount of data continues to increase, the problem of data quality has also become increasingly prominent. There is often huge wealth behind the data, but the quality of the data is the guarantee of these wealth. Without the guarantee of data quality, this large amount of data can only dig out useless information. Therefore, the importance of data quality is self-evident. The missing data problem is a particularly serious type of problem in the data quality problem. In many database applications today, missing data is common due to various issues that may exist for a given database, such as incomplete access, inaccurate extraction, or heter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/215
Inventor 王建民宋韶旭孙宇
Owner TSINGHUA UNIV