公开(公告)号：US20210182167A1

公开(公告)日：2021-06-17

申请号：US17002965

申请日：2020-08-26

Applicant: Hitachi, Ltd.

Inventor： Yoichi KAWACHIYA ,  Masakazu TAKAHASHI ,  Keiro MURO

IPC: G06F11/32 ,  G06F11/34

Abstract: A traceability estimation unit generates batch combination output data configured by a plurality of combinations of a batch in the first process and a batch in the second process, and the feature of the batch. The traceability estimation unit estimates the combination of the batch in the first process and the batch in the second process, which is used as traceability, from the plurality of the combinations of the batches in the batch combination output data by using the feature.

公开(公告)号：US20190361809A1

公开(公告)日：2019-11-28

申请号：US16333744

申请日：2017-08-03

Applicant: Hitachi, Ltd.

Inventor： Cheng LUO ,  Machiko ASAIE ,  Keiro MURO

IPC: G06F12/0802

Abstract: A computer system acquires information on a first present input subset selected from first present input data for a first step from a run-time log of the first step, determines whether or not first cache data corresponding to the first present input subset for the first step is present in a cache area with reference to management information, and determines the first cache data as present output data for the first present input data in a case where the first cache data is present.

公开(公告)号：US20190064788A1

公开(公告)日：2019-02-28

申请号：US15916312

申请日：2018-03-09

Applicant: Hitachi, Ltd.

Inventor： Takuya KOMATSUDA ,  Machiko ASAIE ,  Keiro MURO

IPC: G05B23/02 ,  G06F11/30

Abstract: Indexes having local features are automatically selected from sensor data of a plurality of sensors. Sensor data of the plurality of sensors, each associated with the plurality of indexes, is partitioned into a plurality of blocks. A principal component analysis is applied to the sensor data of each of the partitioned blocks and a plurality of principal components are extracted from each of the blocks. A migration distance evaluation unit extracts, from two different blocks, two principal components that form a principal component pair, and calculates a migration distance between each of the principal components regarding the extracted principal component pair. A migration factor index detection unit detects, as a migration factor index, an index among the plurality of indexes configuring the principal components having a large migration distance among the migration distances between each of the principal components calculated by the migration distance evaluation unit.