Title:
TIME-SERIES-DATA FEATURE-AMOUNT EXTRACTION DEVICE, TIME-SERIES-DATA FEATURE-AMOUNT EXTRACTION METHOD AND TIME-SERIES-DATA FEATURE-AMOUNT EXTRACTION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2018/047655
Kind Code:
A1
Abstract:
A time-series-data feature-amount extraction device comprising: a data processing unit in which a received unevenly spaced time-series-data group is processed into an evenly spaced time-series-data group including omissions and an omission information group indicating the presence or absence of omissions on the basis of the length of received input time-series data and a received minimum observation interval;a model learning unit that learns a weighting vector of each layer of a model, using, as the error, the difference between the elements not omitted from a matrix of the evenly spaced time-series-data group which includes omissions and the elements in the output result from a model output layer, and stores the weighting vector as a model parameter in a storage unit; and a feature-amount extraction unit that receives the time-series-data to be subjected to feature-amount extraction, inputs the received time-series-data to be subjected to feature-amount extraction into the model in order to calculate a value for the middle layer of the model using the model parameters stored in the storage unit, and outputs the calculated middle layer value as the feature amount expressing change over time in the data.
Inventors:
KURASAWA HISASHI (JP)
HAYASHI KATSUYOSHI (JP)
FUJINO AKINORI (JP)
OGASAWARA TAKAYUKI (JP)
YAMAGUCHI MASUMI (JP)
TSUKADA SHINGO (JP)
NAKASHIMA HIROSHI (JP)
HAYASHI KATSUYOSHI (JP)
FUJINO AKINORI (JP)
OGASAWARA TAKAYUKI (JP)
YAMAGUCHI MASUMI (JP)
TSUKADA SHINGO (JP)
NAKASHIMA HIROSHI (JP)
Application Number:
PCT/JP2017/030743
Publication Date:
March 15, 2018
Filing Date:
August 28, 2017
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G06N3/08; G06N5/02
Foreign References:
| JP2006163521A | 2006-06-22 | |||
| JP2014063432A | 2014-04-10 |
Other References:
YOSUKE SUZUKI ET AL.: "Experimental Evaluation of Input Vector Complemention for Autoencoder- based Recommendation Systems", DAI 108 KAI SPECIAL INTERNET GROUP ON KNOWLEDGE-BASED SOFTWARE SHIRYO (SIG-KBS-B504), 1 June 2016 (2016-06-01), pages 6 - 11, XP055593681
See also references of EP 3511871A4
See also references of EP 3511871A4
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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