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).
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Publication number: 20230101572Abstract: 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: ApplicationFiled: December 5, 2022Publication date: March 30, 2023Inventors: Aleks Kracun, Niranjan Subrahmanya, Aishanee Shah
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Patent number: 11521604Abstract: 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: GrantFiled: September 3, 2020Date of Patent: December 6, 2022Assignee: GOOGLE LLCInventors: Aleks Kracun, Niranjan Subrahmanya, Aishanee Shah
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Publication number: 20220284891Abstract: 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: ApplicationFiled: March 3, 2021Publication date: September 8, 2022Inventors: Hyun Jin Park, Pai Zhu, Ignacio Lopez Moreno, Niranjan Subrahmanya
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Publication number: 20220068268Abstract: 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: ApplicationFiled: September 3, 2020Publication date: March 3, 2022Inventors: Aleks Kracun, Niranjan Subrahmanya, Aishanee Shah
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Patent number: 11119235Abstract: 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: GrantFiled: August 9, 2018Date of Patent: September 14, 2021Assignee: ExxonMobil Upstream Research CompanyInventors: Wei D. Liu, Diego A. Hernandez, Niranjan A. Subrahmanya, D. Braden Fitz-Gerald
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Patent number: 10996372Abstract: 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: GrantFiled: August 7, 2018Date of Patent: May 4, 2021Assignee: ExxonMobil Upstream Research CompanyInventors: Huseyin Denli, Niranjan A. Subrahmanya
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Patent number: 10915073Abstract: 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: GrantFiled: December 13, 2018Date of Patent: February 9, 2021Assignee: ExxonMobil Research and Engineering CompanyInventors: Thomas A. Badgwell, Kuang-Hung Liu, Niranjan A. Subrahmanya, Wei D. Liu, Michael H. Kovalski
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Patent number: 10480305Abstract: 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: GrantFiled: August 5, 2016Date of Patent: November 19, 2019Assignee: ExxonMobil Upstream Research CompanyInventors: Amr El-Bakry, Joseph K. Bjerkseth, Niranjan A. Subrahmanya, Peng Xu
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Publication number: 20190278880Abstract: 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: ApplicationFiled: March 7, 2019Publication date: September 12, 2019Inventors: Ning Ma, Niranjan A. Subrahmanya, Wei D. Liu, Sumathy Raman
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Publication number: 20190187631Abstract: 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: ApplicationFiled: December 13, 2018Publication date: June 20, 2019Inventors: Thomas A. Badgwell, Kuang-Hung Liu, Niranjan A. Subrahmanya, Wei D. Liu, Michael H. Kovalski
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Publication number: 20190064378Abstract: 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: ApplicationFiled: August 9, 2018Publication date: February 28, 2019Inventors: Wei D. LIU, Diego A. Hernandez, Niranjan A. Subrahmanya, D. Braden Fitz-Gerald
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Publication number: 20190064389Abstract: 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: ApplicationFiled: August 7, 2018Publication date: February 28, 2019Inventors: Huseyin DENLI, Niranjan A. Subrahmanya
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Publication number: 20170058659Abstract: 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: ApplicationFiled: August 5, 2016Publication date: March 2, 2017Inventors: Amr EL-BAKRY, Joseph K. Bjerkseth, Niranjan A. Subrahmanya, Peng Xu
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Patent number: 9328578Abstract: 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: GrantFiled: November 17, 2011Date of Patent: May 3, 2016Assignee: ExxonMobil Upstream Research CompanyInventors: Krishnan Kumaran, Niranjan A. Subrahmanya, Pavlin B. Entchev, Randy C. Tolman, Renzo Moises Angeles Boza
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Publication number: 20130255939Abstract: 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: ApplicationFiled: November 17, 2011Publication date: October 3, 2013Inventors: Krishnan Kumaran, Niranjan A. Subrahmanya, Pavlin B. Entchev, Randy C. Tolman, Renzo Moises Angeles Boza
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Publication number: 20130110485Abstract: 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: ApplicationFiled: October 5, 2012Publication date: May 2, 2013Inventors: Weichang Li, Niranjan A. Subrahmanya, Limin Song, Adam K. Usadi, Krishnan Kumaran, Peng Xu, Michael E. McCracken, Dale E. Fitz