Title:
PATTERN EXTRACTION METHOD AND PATTERN EXTRACTION DEVICE
Document Type and Number:
Japanese Patent JP2022185159
Kind Code:
A
Abstract:
To provide a method for extracting a pattern of a more complicated shape by an intuitive operation from time-series data.SOLUTION: Time series data used for learning is collected, pre-processed, and accumulated. An extraction interval and a non-extraction interval are accepted relative to the time series data. Identifiers different from each other are given to the extraction interval and the non-extraction interval, respectively. Based on the time series data and a predetermined window width, a subsequence set is generated. A value is generated indicating whether or not each subsequence is extracted based on the identifiers. An extraction determination model for identifying whether or not to extract the subsequence is learned and accumulated. The time series data to be subjected to pattern extraction is collected. A subsequence set to be a pattern extraction target is generated based on the time series data and a window width. Based on the extraction determination model, a prediction value of each subsequence is generated. Based on the prediction value, determination is made as to whether or not each element of the time series data is to be extracted and a sequence of temporally consecutive elements determined to be extracted is extracted as a pattern.SELECTED DRAWING: Figure 9
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Inventors:
TAJIMA NORIYUKI
TAKAHASHI YOSHIYASU
FUJII KIYOTAKA
YAMAZAKI MASAHIRO
SATO KENJI
TAKAHASHI YOSHIYASU
FUJII KIYOTAKA
YAMAZAKI MASAHIRO
SATO KENJI
Application Number:
JP2019206445A
Publication Date:
December 14, 2022
Filing Date:
November 14, 2019
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD
International Classes:
G06F17/18; G05B23/02
Attorney, Agent or Firm:
Seiryo Patent Attorneys Corporation