公开(公告)号：US20220019594A1

公开(公告)日：2022-01-20

申请号：US17206447

申请日：2021-03-19

Applicant: HITACHI, LTD.

Inventor： Norifumi NISHIKAWA ,  Kazuhiko MOGI ,  Mika TAKATA

IPC: G06F16/2457 ,  G06F16/242 ,  G06F16/248 ,  G06F16/21

Abstract: To support an efficient data search. A data processing device comprises a processor, and additionally comprises, as processing units which run on the processor, a generation unit which generates a generated search condition, which is a new search condition, based on a designated search condition, which is a given search condition, an estimation unit which estimates, for each search condition, a number of results of a search conducted based on the designated search condition and the generated search condition by using statistical information of a database to be searched, an evaluation unit which evaluates the generated search condition, and an output unit which outputs a number of estimated results of the designated search condition, and additionally outputs the generated search condition and a number of estimated results and an evaluation result of the generated search condition.

公开(公告)号：US20240112815A1

公开(公告)日：2024-04-04

申请号：US18465001

申请日：2023-09-11

Applicant: Hitachi, Ltd.

Inventor： Giada CONFORTOLA ,  Mika TAKATA ,  Toshihiko KASHIYAMA

IPC: G16H50/30

CPC classification number: G16H50/30

Abstract: A system is configured to acquire, from history data, entity data similar to target entity data which is data including a feature value of each of plurality of features related to a target entity. The history data includes entity data for each of a plurality of entities at each past time point. For each entity, entity data at a past time point includes a feature value at the time point for each feature of the entity. The system is configured to create, for each controllable feature among the plurality of features related to the target entity, based on statistics of a plurality of feature values in related case data which is data including entity data similar to the target entity data, a proposal of a feature value change for reducing a risk predicted by inputting the target entity data to a prediction model. A user interface which displays the proposal.

公开(公告)号：US20230162086A1

公开(公告)日：2023-05-25

申请号：US17973670

申请日：2022-10-26

Applicant: Hitachi, Ltd.

Inventor： Ken NAONO ,  Mika TAKATA ,  Hiroaki MASUDA

IPC: G06N20/00 ,  G06F16/25

CPC classification number: G06N20/00 ,  G06F16/258

Abstract: One preferred aspect of the present invention is a method of configuring a data model for learning data for machine learning, the method including, in a case where data items of a database as a basis of the learning data have a hierarchical structure of a degree of abstraction or a degree of detail, by using a filter that enables the degree of abstraction or the degree of detail of the data items to be designated for each of the data items and sorts the data items into an objective variable and an explanatory variable, configuring a data model that extracts a data item to be used for learning data among the data items from the database.

公开(公告)号：US20220292212A1

公开(公告)日：2022-09-15

申请号：US17465114

申请日：2021-09-02

Applicant: HITACHI, LTD.

Inventor： Norifumi NISHIKAWA ,  Mika TAKATA

IPC: G06F21/62 ,  G06F21/64 ,  G06F17/18

Abstract: The data management device includes a determination unit that determines whether the secondary data generated from the source data to be processed complies with the data handling rules that use statistical information and a data processing unit that performs the processing a determination result by the determination unit. The determination unit estimates the statistical information from the source data to be processed, and determines whether the data handling rule is complied with, prior to the generation of the secondary data, based on whether the secondary data generated based on the estimated statistical information satisfies the statistical values of the statistical information. The data processing unit executes processing when it is determined that the data handling rules are complied with to generate secondary data and does not perform the processing process when it is determined that the data handling rules are not complied with.

公开(公告)号：US20170046353A1

公开(公告)日：2017-02-16

申请号：US15305481

申请日：2014-07-29

Applicant: HITACHI, LTD.

Inventor： Mika TAKATA ,  Norifumi NISHIKAWA ,  Yasushi MIYATA ,  Nobuaki KOHINATA

IPC: G06F17/30

CPC classification number: G06F16/125 ,  G06F16/162 ,  G06F16/172 ,  G06F16/24552 ,  G06F16/2474

Abstract: A database management system (DBMS) is configured to delete, from a database storing information about time points associated with records, a record indicating a lapse of a predetermined time period since a time point indicated by associated information. The DBMS receives a remaining condition which indicates a time period during which a record is kept in the database regardless of the predetermined time period, and controls to keep a record in the database even after a lapse of the predetermined time period, based on the remaining condition.

Abstract translation: 数据库管理系统（DBMS）被配置为从存储关于与记录相关联的时间点的信息的数据库中删除表示自关联信息指示的时间点起经过了预定时间段的记录。 数据库管理系统接收剩余条件，其指示记录保存在数据库中的时间段，而不管预定的时间段，并且控制即使在经过预定时间段之后仍然保持数据库中的记录，基于剩余条件 条件。