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AssigneeNippon Telegraph and Telephone Corporation
InventorsAkihiro Chiba, Shozo Azuma, Kazuhiro Yoshida, Hisashi Kurasawa, Naoki Asanoma, Kana Eguchi, Tsutomu Yabuuchi
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A data processing device that makes effective use of a data group containing missing data is provided. A series of learning data containing missing data is acquired, and a representative value of data and a validity ratio representing a proportion of valid data being present are calculated from the series of learning data according to a predefined unit of aggregation. Then, learning of an estimation model is performed so as to minimize an error which is based on a difference between an output resulting from inputting the representative value and the validity ratio to the estimation model, and the representative value. Also, a series of estimation data containing missing data is acquired, and a representative value of data and a validity ratio representing a proportion of valid data being present are calculated from the series of estimation data according to a predefined unit of aggregation. Then, the representative value and the validity ratio are input to the learned estimation model and a feature value is acquired or data estimation is performed for the series of estimation data.
A data processing device comprising:
A data processing method to be performed by a data processing device, the method comprising:
A non-transitory computer readable medium storing one or more instructions for causing a processor to execute:
Dependencies are inferred from the claim text.