公开(公告)号：US20210365813A1

公开(公告)日：2021-11-25

申请号：US17209341

申请日：2021-03-23

Applicant: Hitachi, Ltd.

Inventor： Kaori NAKANO ,  Masaharu UKEDA ,  Soichi TAKASHIGE ,  Yuxin LIANG

IPC: G06N5/04 ,  G06N20/00

Abstract: A management computer for managing a system that makes an inference using a training model has a processor for performing a process in cooperation with a memory, and the processor executes: a generation process for generating an accuracy improvement prediction model for predicting the accuracy of a retrained model when retraining is executed using retraining data including new collected data collected from the system after the start of the operation of the system based on a correlation between the Feature of training data used for training of the training model and the accuracy of the training model; a prediction process for predicting the accuracy of the retrained model from the accuracy improvement prediction model and the Feature of the retraining data; and a determination process for determining whether or not the execution of the retraining is necessary based on the predicted accuracy of the retrained model.

公开(公告)号：US20220230119A1

公开(公告)日：2022-07-21

申请号：US17468797

申请日：2021-09-08

Applicant: Hitachi, Ltd.

Inventor： Yuxin LIANG ,  Masashi EGI ,  Yusuke FUNAYA ,  Masakazu TAKAHASHI

IPC: G06Q10/06 ,  G06F3/0482

Abstract: A computer has: a testing unit obtaining attribute values of attributes from an object to which a measure is implemented and an object to which the measure is not implemented, and calculating a change amount of the attribute values of the attributes due to the implementation of the measure and a test indicator for determining a significant difference of the change amount of the attribute values of the attributes due to the implementation of the measure; an experimental rule updating unit calculating a cumulative change amount indicating a temporal change amount of the attribute values of the attributes and a cumulative test indicator indicating a temporal test indicator of the attributes on the basis of a test result output from the testing unit, and accumulating data in which the identification information of the measure and the cumulative change amount and the cumulative test indicator are associated; and a display unit.

公开(公告)号：US20200034738A1

公开(公告)日：2020-01-30

申请号：US16504897

申请日：2019-07-08

Applicant: Hitachi, Ltd.

Inventor： Masashi EGI ,  Yuxin LIANG ,  Naoaki YOKOI ,  Masayoshi MASE ,  Naofumi HAMA ,  Yasuhide MORI ,  Hiroyuki NAMBA

IPC: G06N20/00 ,  G06F16/22

Abstract: There is provided is a computer system that outputs a predicted value of data to be evaluated using a predictor generated using learning data. The computer system includes the predictor; an index calculation unit that calculates an interpretation index of the data to be evaluated; and an extraction unit that selects the learning data useful for a user to interpret the predicted value of the data to be evaluated, wherein index management information for managing an interpretation index of the learning data is stored, the index calculation unit calculates the interpretation index of the data to be evaluated, and the extraction unit calculates a selection index based on the interpretation index of the data to be evaluated and the interpretation index of the learning data, selects the learning data based on the selection index, and outputs display information for presenting information indicating a processing result.

公开(公告)号：US20230044694A1

公开(公告)日：2023-02-09

申请号：US17690300

申请日：2022-03-09

Applicant: Hitachi, Ltd.

Inventor： Masakazu TAKAHASHI ,  Masashi EGI ,  Yuxin LIANG

IPC: G06Q10/06

Abstract: To provide an action evaluation system capable of more efficiently planning a new action based on an execution result of a test for limited action conditions. A condition change tracking unit determines, based on execution result information obtained by executing a test related to an action for an action target having a predetermined action condition, a condition change which is a change in the action condition before and after the test. A result verification unit calculates, based on the execution result information, an evaluation value obtained by evaluating an effect of the action. A reward distribution unit calculates a change contribution degree which is a degree of contribution of the condition change to the evaluation value.

公开(公告)号：US20200233836A1

公开(公告)日：2020-07-23

申请号：US16739198

申请日：2020-01-10

Applicant: Hitachi, Ltd.

Inventor： Naoaki YOKOI ,  Masashi EGI ,  Daisuke TASHIRO ,  Yuxin LIANG

IPC: G06F16/11 ,  G06F16/16 ,  G06F16/182 ,  G06F16/17

Abstract: Provided is a computer system to present information useful for achieving purposes related to an object by utilizing AI prediction. The computer system manages a prediction model for predicting an object event based on evaluation data and feature profiling database that defines a change rule of each of the plurality of feature values included in the evaluation data, generates change policy data by changing the plurality of feature values included in the evaluation data based on the feature profiling database, calculates an evaluation value indicating effectiveness of the change policy data, and generates display data for presenting the change policy data and the evaluation value as information useful for achieving purposes related to the object.

公开(公告)号：US20180274929A1

公开(公告)日：2018-09-27

申请号：US15756716

申请日：2016-04-06

Applicant: HITACHI, LTD.

Inventor： Masayoshi MASE ,  Yuxin LIANG ,  Junji YAMAMOTO

IPC: G01C21/20 ,  G08G3/02

Abstract: Provided is a technique for reducing the calculation load in navigation management of a moving body within a freely navigable space. The system has a storage unit 21 for storing movement locus data showing a plurality of movement loci in which a moving body is moved in a two-dimensional or three-dimensional space in which free movement is possible; a network model management unit 11 for integrating sections approximated by the plurality of movement loci on the basis of the movement locus data, and generating a network model showing a route within the space; a navigation schedule calculation unit 13 for calculating a navigation schedule when a plurality of moving bodies planning to pass within the space navigate within that space according to the network model route; and a display processing unit 15 for outputting the calculated navigation schedule to a display apparatus.