Patents by Inventor Alisha Deshpande

Alisha Deshpande 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).

  • Patent number: 10876867
    Abstract: Methods and systems for detecting a fault in a data set from an industrial process are disclosed. One method includes forming a first data matrix at a data processing framework from time-series training data, and performing a principal component pursuit on the first data matrix to form an uncorrupted, unscaled matrix and a sparse matrix in the memory, and scaling the uncorrupted, unscaled matrix to form an uncorrupted scaled matrix. The method also includes performing a dynamic principal component analysis (DPCA) on the uncorrupted scaled matrix to form a DPCA model, and determining a squared prediction error from the DPCA model. Based on the squared prediction error, faults are detected in a different data set from operation of the industrial process. At least one of (1) correcting the one or more faults in the different data set or (2) performing a repair operation on a sensor is performed.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: December 29, 2020
    Assignees: Chevron U.S.A. Inc., University of Southern California
    Inventors: Alisha Deshpande, Si-Zhao J. Qin, Lisa Ann Brenskelle
  • Publication number: 20200348659
    Abstract: Methods and systems for building and maintaining model(s) of a physical process are disclosed. One method includes receiving training data associated with a plurality of different data sources, and performing a clustering process to form one or more clusters. For each of the one or more clusters, the method includes building a data model based on the training data associated with the data sources in the cluster, automatically performing a data cleansing process on operational data based on the data model, and automatically updating the data model based on updated training data that is received as operational data. For data sources excluded from the clusters, automatic building, data cleansing, and updating of models can also be applied.
    Type: Application
    Filed: May 1, 2020
    Publication date: November 5, 2020
    Applicants: Chevron U.S.A. Inc., University of Southern California
    Inventors: Yining DONG, Alisha DESHPANDE, Yingying ZHENG, Lisa Ann BRENSKELLE, Si-Zhao QIN
  • Patent number: 10638013
    Abstract: Systems and methods for processing online data are disclosed. One such method includes receiving a plurality of data points in a time-series at a short term storage. The method also includes calculating at least one approximation coefficient based on the plurality of data points using a wavelet transform, including calculating a highest level approximation coefficient, and calculating estimated value based on the highest level approximation coefficient. The method further includes calculating differences between the estimated value and the plurality of data points of the short term storage, and determining whether a maximum difference among the calculated differences is less than a predetermined threshold. The method further includes, based on the maximum difference being greater than or equal to the predetermined threshold, storing the oldest data point of the short term storage in a long term storage.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: April 28, 2020
    Assignee: Chevron U.S.A. Inc.
    Inventors: Alisha Deshpande, Lisa Ann Brenskelle
  • Publication number: 20180136019
    Abstract: Methods and systems for detecting a fault in a data set from an industrial process are disclosed. One method includes forming a first data matrix at a data processing framework from time-series training data, and performing a principal component pursuit on the first data matrix to form an uncorrupted, unscaled matrix and a sparse matrix in the memory, and scaling the uncorrupted, unscaled matrix to form an uncorrupted scaled matrix. The method also includes performing a dynamic principal component analysis (DPCA) on the uncorrupted scaled matrix to form a DPCA model, and determining a squared prediction error from the DPCA model. Based on the squared prediction error, faults are detected in a different data set from operation of the industrial process. At least one of (1) correcting the one or more faults in the different data set or (2) performing a repair operation on a sensor is performed.
    Type: Application
    Filed: November 13, 2017
    Publication date: May 17, 2018
    Applicants: Chevron U.S.A. Inc., University of Southern California
    Inventors: ALISHA DESHPANDE, SI-ZHAO J. QIN, LISA ANN BRENSKELLE
  • Publication number: 20170359478
    Abstract: Systems and methods for processing online data are disclosed. One such method includes receiving a plurality of data points in a time-series at a short term storage. The method also includes calculating at least one approximation coefficient based on the plurality of data points using a wavelet transform, including calculating a highest level approximation coefficient, and calculating estimated value based on the highest level approximation coefficient. The method further includes calculating differences between the estimated value and the plurality of data points of the short term storage, and determining whether a maximum difference among the calculated differences is less than a predetermined threshold. The method further includes, based on the maximum difference being greater than or equal to the predetermined threshold, storing the oldest data point of the short term storage in a long term storage.
    Type: Application
    Filed: June 9, 2017
    Publication date: December 14, 2017
    Applicant: Chevron U.S.A. Inc.
    Inventors: Alisha Deshpande, Lisa Ann Brenskelle
  • Publication number: 20160179599
    Abstract: A computer-implemented method for reconstructing data includes receiving a selection of one or more input data streams at a data processing framework. The method can include determining existence of a fault in the input data stream(s). This determination can be based on receiving a definition of one or more analytics components at the data processing framework and applying a dynamic principal component analysis (DPCA) to the input data streams. Detection of the fault can be based at least in part on a prediction error and a variation in principal component subspace generated based on the DPCA. Detection of the fault can also be based on performing a wavelet transform to generate a set of coefficients defining the data stream, the set of coefficients including one or more coefficients representing a high frequency portion of data included in the data stream. The method can include reconstructing data at the fault.
    Type: Application
    Filed: November 10, 2015
    Publication date: June 23, 2016
    Applicants: University of Southern California, Chevron U.S.A. Inc.
    Inventors: Alisha Deshpande, Yining Dong, Gang Li, Yingying Zheng, Si-Zhao Qin, Lisa Ann Brenskelle