Patents by Inventor Kazuyuki OOTA

Kazuyuki OOTA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220334912
    Abstract: A system displays a fault tree of a generated event on the basis of input information including diagnosis result information representing results of diagnosis of the cause of the generated event. The input information includes information representing causal relationships between a plurality of elements, including the generated event, failure causes that may be a cause of the event, and check items associated with the failure causes. The diagnosis result information includes an occurrence probability of each failure cause.
    Type: Application
    Filed: February 25, 2022
    Publication date: October 20, 2022
    Inventors: Kana OKI, Shuntaro HITOMI, Kazuyuki OOTA
  • Publication number: 20220270115
    Abstract: A learner generation unit generates, as a learner group, a plurality of learners that learned a correspondence of an attribute and an outcome in each of a plurality of learning data sets extracted from a data group associated with an attribute and an outcome of each of the targets. A target selection unit applies the learner group selected for inference to an inference data set and predicts, for each of the learners, an outcome corresponding to an attribute in the inference data set, calculates, for each attribute in the inference data set, at least one of an average of the outcomes predicted for each of the learners or an index value expressing an uncertainty of the outcomes, and selects, from the inference data set, the target to which the policy is to be executed based on at least one of the calculated average or the calculated index value.
    Type: Application
    Filed: December 16, 2020
    Publication date: August 25, 2022
    Inventors: Kazuki YAMANE, Kazuaki TOKUNAGA, Kazuyuki OOTA, Hiroyuki NAMBA
  • Patent number: 11182413
    Abstract: An analysis system is configured to acquire data of a first numeric feature combination by referring to the parent population data. The data of the first numeric feature combination includes a score of a target indicator for each of category combinations. Each category combination of the category combinations is composed of categories of the numeric features of the first numeric feature combination. The analysis system is configured to determine a score at coordinates corresponding to each of the category combinations in a space having each of the numeric features of the first numeric feature combination as an axis, calculate a gradient feature vector representing a gradient for the score in the space, and determine, based on the gradient feature vector, whether to include the first numeric feature combination in numeric feature combinations to be extracted from the parent population data.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: November 23, 2021
    Assignee: HITACHI, LTD.
    Inventors: Kazuyuki Oota, Toshiyuki Ukai, Kazuaki Tokunaga
  • Publication number: 20200250211
    Abstract: An analysis system is configured to acquire data of a first numeric feature combination by referring to the parent population data. The data of the first numeric feature combination includes a score of a target indicator for each of category combinations. Each category combination of the category combinations is composed of categories of the numeric features of the first numeric feature combination. The analysis system is configured to determine a score at coordinates corresponding to each of the category combinations in a space having each of the numeric features of the first numeric feature combination as an axis, calculate a gradient feature vector representing a gradient for the score in the space, and determine, based on the gradient feature vector, whether to include the first numeric feature combination in numeric feature combinations to be extracted from the parent population data.
    Type: Application
    Filed: September 4, 2019
    Publication date: August 6, 2020
    Inventors: Kazuyuki OOTA, Toshiyuki Ukai, Kazuaki Tokunaga