Patents by Inventor Niranjan A. Subrahmanya

Niranjan A. Subrahmanya 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: 20230101572
    Abstract: Techniques are described herein for improving performance of machine learning model(s) and thresholds utilized in determining whether automated assistant function(s) are to be initiated. A method includes: receiving, via one or more microphones of a client device, audio data that captures a spoken utterance of a user; processing the audio data using a machine learning model to generate a predicted output that indicates a probability of one or more hotwords being present in the audio data; determining that the predicted output satisfies a secondary threshold that is less indicative of the one or more hotwords being present in the audio data than is a primary threshold; in response to determining that the predicted output satisfies the secondary threshold, prompting the user to indicate whether or not the spoken utterance includes a hotword; receiving, from the user, a response to the prompting; and adjusting the primary threshold based on the response.
    Type: Application
    Filed: December 5, 2022
    Publication date: March 30, 2023
    Inventors: Aleks Kracun, Niranjan Subrahmanya, Aishanee Shah
  • Patent number: 11521604
    Abstract: Techniques are described herein for improving performance of machine learning model(s) and thresholds utilized in determining whether automated assistant function(s) are to be initiated. A method includes: receiving, via one or more microphones of a client device, audio data that captures a spoken utterance of a user; processing the audio data using a machine learning model to generate a predicted output that indicates a probability of one or more hotwords being present in the audio data; determining that the predicted output satisfies a secondary threshold that is less indicative of the one or more hotwords being present in the audio data than is a primary threshold; in response to determining that the predicted output satisfies the secondary threshold, prompting the user to indicate whether or not the spoken utterance includes a hotword; receiving, from the user, a response to the prompting; and adjusting the primary threshold based on the response.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: December 6, 2022
    Assignee: GOOGLE LLC
    Inventors: Aleks Kracun, Niranjan Subrahmanya, Aishanee Shah
  • Publication number: 20220284891
    Abstract: Teacher-student learning can be used to train a keyword spotting (KWS) model using augmented training instance(s). Various implementations include aggressively augmenting (e.g., using spectral augmentation) base audio data to generate augmented audio data, where one or more portions of the base instance of audio data can be masked in the augmented instance of audio data (e.g., one or more time frames can be masked, one or more frequencies can be masked, etc.). Many implementations include processing augmented audio data using a KWS teacher model to generate a soft label, and processing the augmented audio data using a KWS student model to generate predicted output. One or more portions of the KWS student model can be updated based on a comparison of the soft label and the generated predicted output.
    Type: Application
    Filed: March 3, 2021
    Publication date: September 8, 2022
    Inventors: Hyun Jin Park, Pai Zhu, Ignacio Lopez Moreno, Niranjan Subrahmanya
  • Publication number: 20220068268
    Abstract: Techniques are described herein for improving performance of machine learning model(s) and thresholds utilized in determining whether automated assistant function(s) are to be initiated. A method includes: receiving, via one or more microphones of a client device, audio data that captures a spoken utterance of a user; processing the audio data using a machine learning model to generate a predicted output that indicates a probability of one or more hotwords being present in the audio data; determining that the predicted output satisfies a secondary threshold that is less indicative of the one or more hotwords being present in the audio data than is a primary threshold; in response to determining that the predicted output satisfies the secondary threshold, prompting the user to indicate whether or not the spoken utterance includes a hotword; receiving, from the user, a response to the prompting; and adjusting the primary threshold based on the response.
    Type: Application
    Filed: September 3, 2020
    Publication date: March 3, 2022
    Inventors: Aleks Kracun, Niranjan Subrahmanya, Aishanee Shah
  • Patent number: 11119235
    Abstract: A method to automatically interpret a subsurface feature within geophysical data, the method including: storing, in a computer memory, geophysical data obtained from a survey of a subsurface region; and extracting, with a computer, a feature probability volume by processing the geophysical data with one or more fully convolutional neural networks, which are trained to relate the geophysical data to at least one subsurface feature, wherein the extracting includes fusing together outputs of the one or more fully convolutional neural networks.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: September 14, 2021
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Wei D. Liu, Diego A. Hernandez, Niranjan A. Subrahmanya, D. Braden Fitz-Gerald
  • Patent number: 10996372
    Abstract: A method including: storing, in a computer memory, geophysical data obtained from a survey of a subsurface region; and extracting, with a computer, a subsurface physical property model by processing the geophysical data with one or more convolutional neural networks, which are trained to relate the geophysical data to at least one subsurface physical property consistent with geological prior information.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: May 4, 2021
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Huseyin Denli, Niranjan A. Subrahmanya
  • Patent number: 10915073
    Abstract: Systems and methods are provided for using a Deep Reinforcement Learning (DRL) agent to provide adaptive tuning of process controllers, such as Proportional-Integral-Derivative (PID) controllers. The agent can monitor process controller performance, and if unsatisfactory, can attempt to improve it by making incremental changes to the tuning parameters for the process controller. The effect of a tuning change can then be observed by the agent and used to update the agent's process controller tuning policy. It has been unexpectedly discovered that providing adaptive tuning based on incremental changes in tuning parameters, as opposed to making changes independent of current values of the tuning parameters, can provide enhanced or improved control over a controlled variable of a process.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: February 9, 2021
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Thomas A. Badgwell, Kuang-Hung Liu, Niranjan A. Subrahmanya, Wei D. Liu, Michael H. Kovalski
  • Patent number: 10480305
    Abstract: A diagnostic apparatus configured to communicate with a well test system comprising a plurality of wells in a field, comprising a receiving component configured to receive a well test data from the well test system, a transmitting component configured to transmit an abnormal well test signal indication, at least one processor configured to communicate with the transmitting component and the receiving component, and a memory coupled to the at least one processor, wherein the memory comprises instructions that when executed by the at least one processor cause the diagnostic apparatus to compare the well test data to one or more well test descriptors stored in memory, correlate the well test data to an abnormal well test result selected based at least in part on the comparison with the one or more well test descriptors stored in the memory, and instruct the transmitting component to transmit an abnormal well test signal indication to a recipient.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: November 19, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Amr El-Bakry, Joseph K. Bjerkseth, Niranjan A. Subrahmanya, Peng Xu
  • Publication number: 20190278880
    Abstract: This disclosure generally relates to a methodology of effectively designing and/or discovering new materials based on microstructure, and more particularly, to designing and/or discovering new materials by combining material fundamentals and experimental data. The methodology disclosed herein provides cost-effective and time-effective solutions for material design that combine the benefits of both of the two major computational material design approaches: physics-based and data-driven computer models.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Inventors: Ning Ma, Niranjan A. Subrahmanya, Wei D. Liu, Sumathy Raman
  • Publication number: 20190187631
    Abstract: Systems and methods are provided for using a Deep Reinforcement Learning (DRL) agent to provide adaptive tuning of process controllers, such as Proportional-Integral-Derivative (PID) controllers. The agent can monitor process controller performance, and if unsatisfactory, can attempt to improve it by making incremental changes to the tuning parameters for the process controller. The effect of a tuning change can then be observed by the agent and used to update the agent's process controller tuning policy. It has been unexpectedly discovered that providing adaptive tuning based on incremental changes in tuning parameters, as opposed to making changes independent of current values of the tuning parameters, can provide enhanced or improved control over a controlled variable of a process.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 20, 2019
    Inventors: Thomas A. Badgwell, Kuang-Hung Liu, Niranjan A. Subrahmanya, Wei D. Liu, Michael H. Kovalski
  • Publication number: 20190064378
    Abstract: A method to automatically interpret a subsurface feature within geophysical data, the method including: storing, in a computer memory, geophysical data obtained from a survey of a subsurface region; and extracting, with a computer, a feature probability volume by processing the geophysical data with one or more fully convolutional neural networks, which are trained to relate the geophysical data to at least one subsurface feature, wherein the extracting includes fusing together outputs of the one or more fully convolutional neural networks.
    Type: Application
    Filed: August 9, 2018
    Publication date: February 28, 2019
    Inventors: Wei D. LIU, Diego A. Hernandez, Niranjan A. Subrahmanya, D. Braden Fitz-Gerald
  • Publication number: 20190064389
    Abstract: A method including: storing, in a computer memory, geophysical data obtained from a survey of a subsurface region; and extracting, with a computer, a subsurface physical property model by processing the geophysical data with one or more convolutional neural networks, which are trained to relate the geophysical data to at least one subsurface physical property consistent with geological prior information.
    Type: Application
    Filed: August 7, 2018
    Publication date: February 28, 2019
    Inventors: Huseyin DENLI, Niranjan A. Subrahmanya
  • Publication number: 20170058659
    Abstract: A diagnostic apparatus configured to communicate with a well test system comprising a plurality of wells in a field, comprising a receiving component configured to receive a well test data from the well test system, a transmitting component configured to transmit an abnormal well test signal indication, at least one processor configured to communicate with the transmitting component and the receiving component, and a memory coupled to the at least one processor, wherein the memory comprises instructions that when executed by the at least one processor cause the diagnostic apparatus to compare the well test data to one or more well test descriptors stored in memory, correlate the well test data to an abnormal well test result selected based at least in part on the comparison with the one or more well test descriptors stored in the memory, and instruct the transmitting component to transmit an abnormal well test signal indication to a recipient.
    Type: Application
    Filed: August 5, 2016
    Publication date: March 2, 2017
    Inventors: Amr EL-BAKRY, Joseph K. Bjerkseth, Niranjan A. Subrahmanya, Peng Xu
  • Patent number: 9328578
    Abstract: Methods and apparatus for actuating a downhole tool in wellbore includes acquiring a CCL data set or log from the wellbore that correlates recorded magnetic signals with measured depth, and selects a location within the wellbore for actuation of a wellbore device. The CCL log is then downloaded into an autonomous tool. The tool is programmed to sense collars as a function of time, thereby providing a second CCL log. The autonomous tool also matches sensed collars with physical signature from the first CCL log and then self-actuates the wellbore device at the selected location based upon a correlation of the first and second CCL logs.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: May 3, 2016
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Krishnan Kumaran, Niranjan A. Subrahmanya, Pavlin B. Entchev, Randy C. Tolman, Renzo Moises Angeles Boza
  • Publication number: 20130255939
    Abstract: Methods and apparatus for actuating a downhole tool in wellbore includes acquiring a CCL data set or log from the wellbore that correlates recorded magnetic signals with measured depth, and selects a location within the wellbore for actuation of a wellbore device. The CCL log is then downloaded into an autonomous tool. The tool is programmed to sense collars as a function of time, thereby providing a second CCL log. The autonomous tool also matches sensed collars with physical signature from the first CCL log and then self-actuates the wellbore device at the selected location based upon a correlation of the first and second CCL logs.
    Type: Application
    Filed: November 17, 2011
    Publication date: October 3, 2013
    Inventors: Krishnan Kumaran, Niranjan A. Subrahmanya, Pavlin B. Entchev, Randy C. Tolman, Renzo Moises Angeles Boza
  • Publication number: 20130110485
    Abstract: There is provided a system and method for determining interwell communication in a hydrocarbon-producing field that has a plurality of wells. An exemplary method comprises determining communication relationships for the plurality of wells using a multivariate dynamic joint analysis algorithm based on data representing properties of each of the plurality of wells. The multivariate dynamic joint analysis algorithm may employ a self-response of each of the plurality of wells and an interwell response between combinations of the plurality of wells. Data representative of the communication relationships is provided.
    Type: Application
    Filed: October 5, 2012
    Publication date: May 2, 2013
    Inventors: Weichang Li, Niranjan A. Subrahmanya, Limin Song, Adam K. Usadi, Krishnan Kumaran, Peng Xu, Michael E. McCracken, Dale E. Fitz