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1.发明申请公开(公告)号：US20190243799A1
公开(公告)日：2019-08-08
申请号：US15887234
申请日：2018-02-02
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Mengying Li , Alan Paul Wood , Steven T. Jeffreys , Avishkar Misra , Lawrence L. Fumagalli, JR.
CPC classification number: G06N20/00 , G05B19/048 , G06F16/2474 , G06F17/14 , G06F17/18 , G06K9/6256 , H04W4/38
Abstract: The disclosed embodiments relate to a system that facilitates development of machine-learning techniques to perform prognostic-surveillance operations on time-series data from a monitored system, such as a power plant and associated power-distribution system. During operation, the system receives original time-series signals comprising sequences of observations obtained from sensors in the monitored system. Next, the system decomposes the original time-series signals into deterministic and stochastic components. The system then uses the deterministic and stochastic components to produce synthetic time-series signals, which are statistically indistinguishable from the original time-series signals. Finally, the system enables a developer to use the synthetic time-series signals to develop machine-learning (ML) techniques to perform prognostic-surveillance operations on subsequently received time-series signals from the monitored system.
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2.发明申请公开(公告)号：US20190236162A1
公开(公告)日：2019-08-01
申请号：US15885600
申请日：2018-01-31
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Mengying Li , Dieter Gawlick , Zhen Hua Liu
IPC: G06F17/30
CPC classification number: G06F16/1744 , G06F16/2237 , G06F16/2453 , G06F16/24561
Abstract: The disclosed embodiments relate to a system that caches time-series data in a time-series database system. During operation, the system receives the time-series data, wherein the time-series data comprises a series of observations obtained from sensor readings for each signal in a set of signals. Next, the system performs a multivariate memory vectorization (MMV) operation on the time-series data, which selects a subset of observations in the time-series data that represents an underlying structure of the time-series data for individual and multivariate signals that comprise the time-series data. The system then performs a geometric compression aging (GAC) operation on the selected subset of time-series data. While subsequently processing a query involving the time-series data, the system: caches the selected subset of the time-series data in an in-memory database cache in the time-series database system; and accesses the selected subset of the time-series data from the in-memory database cache.
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公开(公告)号：US10606919B2
公开(公告)日：2020-03-31
申请号：US15826461
申请日：2017-11-29
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Mengying Li , Tahereh Masoumi
Abstract: We present a system that performs prognostic surveillance operations based on sensor signals from a power plant and critical assets in the transmission and distribution grid. The system obtains signals comprising time-series data obtained from sensors during operation of the power plant and associated transmission grid. The system uses an inferential model trained on previously received signals to generate estimated values for the signals. The system then performs a pairwise differencing operation between actual values and the estimated values for the signals to produce residuals. The system subsequently performs a sequential probability ratio test (SPRT) on the residuals to detect incipient anomalies that arise during operation of the power plant and associated transmission grid. While performing the SPRT, the system dynamically updates SPRT parameters to compensate for non-Gaussian artifacts that arise in the sensor data due to changing operating conditions. When an anomaly is detected, the system generates a notification.
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4.发明申请公开(公告)号：US20190197145A1
公开(公告)日：2019-06-27
申请号：US15850027
申请日：2017-12-21
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Dieter Gawlick , Zhen Hua Liu , Mengying Li
IPC: G06F17/30
CPC classification number: G06F16/2365 , G06F16/2477
Abstract: The disclosed embodiments relate to a system that certifies provenance of time-series data in a time-series database. During operation, the system retrieves time-series data from the time-series database, wherein the time-series data comprises a sequence of observations comprising sensor readings for each signal in a set of signals. The system also retrieves multivariate state estimation technique (MSET) estimates, which were computed for the time-series data, from the time-series database. Next, the system performs a reverse MSET computation to produce reconstituted time-series data from the MSET estimates. The system then compares the reconstituted time-series data with the time-series data. If the reconstituted time-series data matches the original time-series data, the system certifies provenance for the time-series data.
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5.发明申请公开(公告)号：US20190154494A1
公开(公告)日：2019-05-23
申请号：US15821593
申请日：2017-11-22
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Mengying Li , Aleksey M. Urmanov
Abstract: The disclosed embodiments relate to a system that detects degradation in one or more rotating components in a monitored system. During operation, the system receives one or more telemetry signals comprising vibration sensor readings from one or more vibration sensors in the monitored system. The system then performs a fast Fourier transform (FFT) on the vibration sensor readings to produce a power spectral density (PSD) distribution. Next, the system identifies a peak in the PSD distribution, wherein the peak is associated with a target rotating component in the monitored system. After identifying the peak, the system computes a full width half maximum (FWHM) value for a curve associated with the peak. Finally, if the FWHM value exceeds a pre-specified threshold, the system generates a notification about degradation of the target rotating component in the monitored system.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20190121714A1
公开(公告)日：2019-04-25
申请号：US15793742
申请日：2017-10-25
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Mengying Li , Alan Paul Wood
CPC classification number: G06F11/3093 , G06F11/008 , G06F11/3447 , G06F17/18 , G06F21/55 , G06N3/08 , G06N7/005 , G06N20/00
Abstract: The disclosed embodiments relate to a system for performing prognostic surveillance operations on sensor data. During operation, the system obtains a group of signals from sensors in a monitored system during operation of the monitored system. Next, if possible, the system performs a clustering operation, which divides the group of signals into groups of correlated signals. Then, for one or more groups of signals that exceed a specified size, the system randomly partitions the groups of signals into smaller groups of signals. Next, for each group of signals, the system trains an inferential model for a prognostic pattern-recognition system based on signals in the group of signals. Then, for each group of signals, the system uses a prognostic pattern-recognition system in a surveillance mode and the inferential model to detect incipient anomalies that arise during execution of the monitored system.
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公开(公告)号：US20190094822A1
公开(公告)日：2019-03-28
申请号：US15715692
申请日：2017-09-26
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Mengying Li , Benjamin P. Franklin, JR.
Abstract: During operation, the system receives a set of input signals containing electrical usage data from a set of smart meters, wherein each smart meter gathers electrical usage data from a customer of the utility system. Next, the system uses the set of input signals to train an inferential model, which learns correlations among the set of input signals, and uses the inferential model to produce a set of inferential signals, wherein an inferential signal is produced for each input signal in the set of input signals. The system then uses a Fourier-based technique to decompose each inferential signal into deterministic and stochastic components, and uses the deterministic and stochastic components to generate a set of synthesized signals, which are statistically indistinguishable from the inferential signals. Finally, the system projects the set of synthesized signals into the future to produce a forecast for the electricity demand.
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8.发明授权公开(公告)号：US10565185B2
公开(公告)日：2020-02-18
申请号：US15850027
申请日：2017-12-21
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Dieter Gawlick , Zhen Hua Liu , Mengying Li
IPC: G06F17/00 , G06F16/23 , G06F16/2458
Abstract: The disclosed embodiments relate to a system that certifies provenance of time-series data in a time-series database. During operation, the system retrieves time-series data from the time-series database, wherein the time-series data comprises a sequence of observations comprising sensor readings for each signal in a set of signals. The system also retrieves multivariate state estimation technique (MSET) estimates, which were computed for the time-series data, from the time-series database. Next, the system performs a reverse MSET computation to produce reconstituted time-series data from the MSET estimates. The system then compares the reconstituted time-series data with the time-series data. If the reconstituted time-series data matches the original time-series data, the system certifies provenance for the time-series data.
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公开(公告)号：US10452510B2
公开(公告)日：2019-10-22
申请号：US15793742
申请日：2017-10-25
Applicant: Oracle International Corporation
Inventor： Kenny C. Gross , Mengying Li , Alan Paul Wood
Abstract: The disclosed embodiments relate to a system for performing prognostic surveillance operations on sensor data. During operation, the system obtains a group of signals from sensors in a monitored system during operation of the monitored system. Next, if possible, the system performs a clustering operation, which divides the group of signals into groups of correlated signals. Then, for one or more groups of signals that exceed a specified size, the system randomly partitions the groups of signals into smaller groups of signals. Next, for each group of signals, the system trains an inferential model for a prognostic pattern-recognition system based on signals in the group of signals. Then, for each group of signals, the system uses a prognostic pattern-recognition system in a surveillance mode and the inferential model to detect incipient anomalies that arise during execution of the monitored system.
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10.发明申请公开(公告)号：US20190310617A1
公开(公告)日：2019-10-10
申请号：US15947548
申请日：2018-04-06
Applicant: Oracle International Corporation
Inventor： Mengying Li , Kenny C. Gross
Abstract: The disclosed embodiments relate to a system that removes quantization effects from a set of time-series signals to produce highly accurate approximations of a set of original unquantized signals. During operation, for each time-series signal in the set of time-series signals, the system determines a number of quantization levels (NQL) in the time-series signal. Next, the system performs a fast Fourier transform (FFT) on the time-series signal to produce a set of Fourier modes for the time-series signal. The system then determines an optimal number of Fourier modes (Nmode) to reconstruct the time-series signal based on the determined NQL for the time-series signal. Next, the system selects Nmode largest-amplitude Fourier modes from the set of Fourier modes for the time-series signal. The system then performs an inverse FFT operation using the Nmode largest-amplitude Fourier modes to produce a dequantized time-series signal to be used in place of the time-series signal.
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