Patents by Inventor Kyong Min Yeo
Kyong Min Yeo 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: 20230376825Abstract: A computer-implemented method, a computer program product, and a computer system for adaptive retraining of an artificial intelligence model. A computer system computes drift magnitude scores for respective drift functions. A computer system computes an aggregated data drift score for a data drift, an aggregated concept drift score for a concept drift, and an aggregated model drift score for a model drift. A computer system computes an overall drift score, based on the aggregated data drift score, the aggregated concept drift score, the aggregated model drift score, a predetermined data drift threshold, a predetermined concept drift threshold, and a predetermined model drift threshold. A computer system determines whether retraining of the artificial intelligence model is required, based on the overall drift score. A computer system performs the retraining of the artificial intelligence model, in response to determining the retraining of the artificial intelligence model is required.Type: ApplicationFiled: May 18, 2022Publication date: November 23, 2023Inventors: Venkata Sitaramagiridharganesh Ganapavarapu, Kyong Min Yeo, Nianjun Zhou, Wesley M. Gifford
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Publication number: 20230244946Abstract: Anomaly detection in industrial dynamic process can include receiving a set of multivariate time series data representative of sensor data obtained over time. The set of multivariate time series data can be transformed into a set of signature vectors in an embedding space. A neural network can be trained to estimate a probability distribution of the set of signature vectors in the embedding space. Streaming data can be received. The streaming data can be appended with a previously stored time series data. The appended streaming data can be transformed into an embedding. The embedding can be input into the trained neural network, the trained neural network outputting a first probability distribution score. A second probability distribution score associated with the embedding can be determined based on a given proposed probability distribution. Anomaly score can be determined based on the first probability distribution score and the second probability distribution score.Type: ApplicationFiled: January 28, 2022Publication date: August 3, 2023Inventors: Kyong Min Yeo, Tsuyoshi Ide, Bhanukiran Vinzamuri, Wesley M. Gifford, Roman Vaculin
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Patent number: 11568101Abstract: Predictive multi-stage modelling for complex semiconductor device manufacturing process control is provided. In one aspect, a method of predictive multi-stage modelling for controlling a complex semiconductor device manufacturing process includes: collecting geometrical data from metrology measurements made at select stages of the manufacturing process; and making an outcome probability prediction at each of the select stages using a multiplicative kernel Gaussian process, wherein the outcome probability prediction is a function of a current stage and all prior stages. Machine-learning models can be trained for each of the select stages of the manufacturing process using the multiplicative kernel Gaussian process. The machine-learning models can be used to provide probabilistic predictions for a final outcome in real-time for production wafers. The probabilistic predictions can then be used to select production wafers for rework, sort, scrap or disposition.Type: GrantFiled: August 13, 2019Date of Patent: January 31, 2023Assignee: International Business Machines CorporationInventors: Scott Halle, Kyong Min Yeo, Robin Hsin Kuo Chao, Derren Dunn
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Patent number: 11242575Abstract: A blast furnace control system may include a hardware processor that generates a deep learning based predictive model for forecasting hot metal temperature, where the actual measured HMT data is only available sparsely, and for example, measured at irregular interval of time. HMT data points may be imputed by interpolating the HMT measurement data. HMT gradients are computed and a model is generated to learn a relationship between state variables and the HTM gradients. HMT may be forecasted for a time point, in which no measured HMT data is available. The forecasted HMT may be transmitted to a controller coupled to a blast furnace, to trigger a control action to control a manufacturing process occurring in the blast furnace.Type: GrantFiled: February 11, 2020Date of Patent: February 8, 2022Assignee: International Business Machines CorporationInventors: Young Min Lee, Kyong Min Yeo
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Orchestration of learning and execution of model predictive control tool for manufacturing processes
Patent number: 11036211Abstract: Based on at least one manufacturing process characteristics associated with a manufacturing process, a prediction time at which to execute a selected machine learning model selected from multiple trained machine learning models is determined, and at the prediction time, the selected machine learning model is executed. Executing the selected machine learning model predicts a control set point for future values of state variables of the manufacturing process, for controlling the manufacturing process. Based on at least one of the manufacturing process characteristics, a learning time at which to train a machine learning model is determined, and at the learning time, the machine learning model is trained based on historical process data associated with the manufacturing process.Type: GrantFiled: May 13, 2019Date of Patent: June 15, 2021Assignee: International Business Machines CorporationInventors: Young Min Lee, Edward Pring, Kyong Min Yeo, Nam H Nguyen, Jayant R. Kalagnanam, Christian Makaya, Hui Qi, Dhavalkumar C Patel -
Publication number: 20210049241Abstract: Predictive multi-stage modelling for complex semiconductor device manufacturing process control is provided. In one aspect, a method of predictive multi-stage modelling for controlling a complex semiconductor device manufacturing process includes: collecting geometrical data from metrology measurements made at select stages of the manufacturing process; and making an outcome probability prediction at each of the select stages using a multiplicative kernel Gaussian process, wherein the outcome probability prediction is a function of a current stage and all prior stages. Machine-learning models can be trained for each of the select stages of the manufacturing process using the multiplicative kernel Gaussian process. The machine-learning models can be used to provide probabilistic predictions for a final outcome in real-time for production wafers. The probabilistic predictions can then be used to select production wafers for rework, sort, scrap or disposition.Type: ApplicationFiled: August 13, 2019Publication date: February 18, 2021Inventors: Scott Halle, Kyong Min Yeo, Robin Hsin Kuo Chao, Derren Dunn
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Patent number: 10755200Abstract: Controlling circumferential variability in a blast furnace may include generating a predictive model that sets up a relationship between a standard deviation of a selected state variable, state variables and one or more control variables in blast furnace operation for predicting the standard deviation. A number of circumferential sections of the blast furnace is defined, and the predictive model associated with the selected state variable for each of the circumferential sections is trained based on process data of the blast furnace. A plurality trained predictive models is generated associated with different circumferential sections and different selected state variables. One or more future control variable set points that minimize a sum of the plurality of predictive models, is determined. One or more future control variable set points is transmitted to a control system to control the blast furnace operation.Type: GrantFiled: September 22, 2017Date of Patent: August 25, 2020Assignee: International Business Machines CorporationInventors: Young Min Lee, Kyong Min Yeo
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Patent number: 10713595Abstract: Controlling circumferential variability in a blast furnace may include generating a predictive model that sets up a relationship between a standard deviation of a selected state variable, state variables and one or more control variables in blast furnace operation for predicting the standard deviation. A number of circumferential sections of the blast furnace is defined, and the predictive model associated with the selected state variable for each of the circumferential sections is trained based on process data of the blast furnace. A plurality trained predictive models is generated associated with different circumferential sections and different selected state variables. One or more future control variable set points that minimize a sum of the plurality of predictive models, is determined. One or more future control variable set points is transmitted to a control system to control the blast furnace operation.Type: GrantFiled: November 14, 2017Date of Patent: July 14, 2020Assignee: International Business Machines CorporationInventors: Young Min Lee, Kyong Min Yeo
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Publication number: 20200172989Abstract: A blast furnace control system may include a hardware processor that generates a deep learning based predictive model for forecasting hot metal temperature, where the actual measured HMT data is only available sparsely, and for example, measured at irregular interval of time. HMT data points may be imputed by interpolating the HMT measurement data. HMT gradients are computed and a model is generated to learn a relationship between state variables and the HTM gradients. HMT may be forecasted for a time point, in which no measured HMT data is available. The forecasted HMT may be transmitted to a controller coupled to a blast furnace, to trigger a control action to control a manufacturing process occurring in the blast furnace.Type: ApplicationFiled: February 11, 2020Publication date: June 4, 2020Inventors: Young Min Lee, Kyong Min Yeo
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Orchestration of learning and execution of model predictive control tool for manufacturing processes
Patent number: 10656631Abstract: Based on at least one manufacturing process characteristics associated with a manufacturing process, a prediction time at which to execute a selected machine learning model selected from multiple trained machine learning models is determined, and at the prediction time, the selected machine learning model is executed. Executing the selected machine learning model predicts a control set point for future values of state variables of the manufacturing process, for controlling the manufacturing process. Based on at least one of the manufacturing process characteristics, a learning time at which to train a machine learning model is determined, and at the learning time, the machine learning model is trained based on historical process data associated with the manufacturing process.Type: GrantFiled: November 14, 2017Date of Patent: May 19, 2020Assignee: International Business Machines CorporationInventors: Young Min Lee, Edward Pring, Kyong Min Yeo, Nam H Nguyen, Jayant R. Kalagnanam, Christian Makaya, Hui Qi, Dhaval Patel -
Patent number: 10633716Abstract: A blast furnace control system may include a hardware processor that generates a deep learning based predictive model for forecasting hot metal temperature, where the actual measured HMT data is only available sparsely, and for example, measured at irregular interval of time. HMT data points may be imputed by interpolating the HMT measurement data. HMT gradients are computed and a model is generated to learn a relationship between state variables and the HTM gradients. HMT may be forecasted for a time point, in which no measured HMT data is available. The forecasted HMT may be transmitted to a controller coupled to a blast furnace, to trigger a control action to control a manufacturing process occurring in the blast furnace.Type: GrantFiled: November 15, 2017Date of Patent: April 28, 2020Assignee: International Business Machines CorporationInventors: Young Min Lee, Kyong Min Yeo
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Patent number: 10604814Abstract: A blast furnace control system may include a hardware processor that generates a deep learning based predictive model for forecasting hot metal temperature, where the actual measured HMT data is only available sparsely, and for example, measured at irregular interval of time. HMT data points may be imputed by interpolating the HMT measurement data. HMT gradients are computed and a model is generated to learn a relationship between state variables and the HTM gradients. HMT may be forecasted for a time point, in which no measured HMT data is available. The forecasted HMT may be transmitted to a controller coupled to a blast furnace, to trigger a control action to control a manufacturing process occurring in the blast furnace.Type: GrantFiled: September 27, 2017Date of Patent: March 31, 2020Assignee: International Business Machines CoporationInventors: Young Min Lee, Kyong Min Yeo
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Patent number: 10607145Abstract: Methods, systems, and computer program products for detection of an arbitrarily-shaped source of an abnormal event via use of a hierarchical reconstruction method are provided herein. A computer-implemented method includes detecting an abnormal event based on analysis of sensor data, wherein said analysis of the sensor data comprises comparing the sensor data to a user-defined threshold; generating a query based on the detected abnormal event; processing the query against one or more given data repositories; executing an inverse model using an output generated in relation to said processing to identify a source of the detected abnormal event, wherein the source comprises an arbitrary shape; and outputting the identified source of the detected abnormal event.Type: GrantFiled: November 23, 2015Date of Patent: March 31, 2020Assignee: International Business Machines CorporationInventors: Youngdeok Hwang, Jayant R. Kalagnanam, Xiao Liu, Kyong Min Yeo
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Publication number: 20200097813Abstract: A computer-implemented method for controlling a manufacturing process. A non-limiting example of the computer-implemented method includes using a processor to perform discretization modeling of a continuous probability distribution to yield a prediction of a future probability distribution. Next, the method uses the processor to impose a smoothness condition on the predicted probability distribution. The method using the processor to perform a multi-step forecast of the probability distribution to create a predicted probability density function. The method uses the predicted probability density function as an input to a process control system and uses the processor to control a process using the predicted probability density function.Type: ApplicationFiled: September 26, 2018Publication date: March 26, 2020Inventors: Kyong Min Yeo, Igor Melnyk, Nam H Nguyen, Tsuyoshi Ide, Jayant R. Kalagnanam
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ORCHESTRATION OF LEARNING AND EXECUTION OF MODEL PREDICTIVE CONTROL TOOL FOR MANUFACTURING PROCESSES
Publication number: 20190265685Abstract: Based on at least one manufacturing process characteristics associated with a manufacturing process, a prediction time at which to execute a selected machine learning model selected from multiple trained machine learning models is determined, and at the prediction time, the selected machine learning model is executed. Executing the selected machine learning model predicts a control set point for future values of state variables of the manufacturing process, for controlling the manufacturing process. Based on at least one of the manufacturing process characteristics, a learning time at which to train a machine learning model is determined, and at the learning time, the machine learning model is trained based on historical process data associated with the manufacturing process.Type: ApplicationFiled: May 13, 2019Publication date: August 29, 2019Inventors: Young Min Lee, Edward Pring, Kyong Min Yeo, Nam H Nguyen, Jayant R. Kalagnanam, Christian Makaya, Hui Qi, Dhaval Patel -
Orchestration of learning and execution of model predictive control tool for manufacturing processes
Patent number: 10394229Abstract: Based on at least one manufacturing process characteristics associated with a manufacturing process, a prediction time at which to execute a selected machine learning model selected from multiple trained machine learning models is determined, and at the prediction time, the selected machine learning model is executed. Executing the selected machine learning model predicts a control set point for future values of state variables of the manufacturing process, for controlling the manufacturing process. Based on at least one of the manufacturing process characteristics, a learning time at which to train a machine learning model is determined, and at the learning time, the machine learning model is trained based on historical process data associated with the manufacturing process.Type: GrantFiled: September 27, 2017Date of Patent: August 27, 2019Assignee: International Business Machines CorporationInventors: Young Min Lee, Edward Pring, Kyong Min Yeo, Nam H Nguyen, Jayant R. Kalagnanam, Christian Makaya, Hui Qi, Dhaval Patel -
Publication number: 20190095812Abstract: Controlling circumferential variability in a blast furnace may include generating a predictive model that sets up a relationship between a standard deviation of a selected state variable, state variables and one or more control variables in blast furnace operation for predicting the standard deviation. A number of circumferential sections of the blast furnace is defined, and the predictive model associated with the selected state variable for each of the circumferential sections is trained based on process data of the blast furnace. A plurality trained predictive models is generated associated with different circumferential sections and different selected state variables. One or more future control variable set points that minimize a sum of the plurality of predictive models, is determined. One or more future control variable set points is transmitted to a control system to control the blast furnace operation.Type: ApplicationFiled: September 22, 2017Publication date: March 28, 2019Inventors: Young Min Lee, Kyong Min Yeo
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Publication number: 20190095816Abstract: Controlling circumferential variability in a blast furnace may include generating a predictive model that sets up a relationship between a standard deviation of a selected state variable, state variables and one or more control variables in blast furnace operation for predicting the standard deviation. A number of circumferential sections of the blast furnace is defined, and the predictive model associated with the selected state variable for each of the circumferential sections is trained based on process data of the blast furnace. A plurality trained predictive models is generated associated with different circumferential sections and different selected state variables. One or more future control variable set points that minimize a sum of the plurality of predictive models, is determined. One or more future control variable set points is transmitted to a control system to control the blast furnace operation.Type: ApplicationFiled: November 14, 2017Publication date: March 28, 2019Inventors: Young Min Lee, Kyong Min Yeo
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Publication number: 20190093187Abstract: A blast furnace control system may include a hardware processor that generates a deep learning based predictive model for forecasting hot metal temperature, where the actual measured HMT data is only available sparsely, and for example, measured at irregular interval of time. HMT data points may be imputed by interpolating the HMT measurement data. HMT gradients are computed and a model is generated to learn a relationship between state variables and the HTM gradients. HMT may be forecasted for a time point, in which no measured HMT data is available. The forecasted HMT may be transmitted to a controller coupled to a blast furnace, to trigger a control action to control a manufacturing process occurring in the blast furnace.Type: ApplicationFiled: November 15, 2017Publication date: March 28, 2019Inventors: Young Min Lee, Kyong Min Yeo
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Publication number: 20190093186Abstract: A blast furnace control system may include a hardware processor that generates a deep learning based predictive model for forecasting hot metal temperature, where the actual measured HMT data is only available sparsely, and for example, measured at irregular interval of time. HMT data points may be imputed by interpolating the HMT measurement data. HMT gradients are computed and a model is generated to learn a relationship between state variables and the HTM gradients. HMT may be forecasted for a time point, in which no measured HMT data is available. The forecasted HMT may be transmitted to a controller coupled to a blast furnace, to trigger a control action to control a manufacturing process occurring in the blast furnace.Type: ApplicationFiled: September 27, 2017Publication date: March 28, 2019Inventors: Young Min Lee, Kyong Min Yeo