Patents by Inventor Zhijie Zhu
Zhijie Zhu 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: 20240086716Abstract: A method for training a deep neural network (DNN) capable of adversarial detection. The DNN is configured with a plurality of sets of weights candidates. The method includes inputting training data selected from training data set to the DNN. The method further includes calculating, based on the training data, a first term for indicating a difference between a variational posterior probability distribution and a true posterior probability distribution of the DNN. The method further includes perturbing the training data to generate perturbed training data; and calculating a second term for indicating a quantification of predictive uncertainty on the perturbed training data. The method further includes updating the plurality of sets of weights candidates of the DNN based on augmenting the summation of the first term and the second term.Type: ApplicationFiled: February 26, 2021Publication date: March 14, 2024Inventors: Hang Su, Jun Zhu, Zhijie Deng, Ze Cheng
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Patent number: 11854583Abstract: The disclosure describes a head gimbal assembly including a suspension and a damping layer on a surface of the suspension. The suspension may include a slider mount configured to establish mechanical communication with a slider and the layer may be displaced from the slider mount. The layer may be configured to provide passive damping or active damping.Type: GrantFiled: March 29, 2021Date of Patent: December 26, 2023Assignee: Regents of the University of MinnesotaInventors: Michael C. McAlpine, Ghazaleh Haghiashtiani, Zhijie Zhu
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Patent number: 11794413Abstract: Systems and techniques are described for additive manufacturing, e.g., 3D printing, a component on an unconstrained freeform build surface. The systems and techniques may allow determining a 3D trajectory and/or deformation of a target deposition region on the build surface by determining a relative location of at least one registration feature on the build surface. Control circuitry may control, based on the 3D trajectory and/or deformation and based on a build model of the component, at least one dispenser to cause dispensing of at least one composition from the at least one dispenser in a predetermined pattern on or adjacent to the target deposition region. The predetermined pattern of the composition defines at least one portion of the component.Type: GrantFiled: July 2, 2019Date of Patent: October 24, 2023Assignee: Regents of the University of MinnesotaInventors: Michael C. McAlpine, Zhijie Zhu
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Patent number: 11725534Abstract: The present disclosure provides a method of multi-objective and multi-dimensional online joint monitoring for a nuclear turbine. The method includes: obtaining first temperature monitoring data of the nuclear turbine by performing online thermal monitoring on a rotor, a valve cage and a cylinder of the nuclear turbine under quick starting-up; obtaining second temperature monitoring data of tightness of a flange association plane of the cylinder of the nuclear turbine by performing online thermal monitoring on the tightness of the flange association plane; obtaining operation monitoring data of a shafting vibration of a rotor and bearing system of the nuclear turbine by performing online safety monitoring on the shafting vibration of the rotor and bearing system; and optimizing operation and maintenance control of the nuclear turbine according to at least one type of monitoring data among the first temperature monitoring data, the second temperature monitoring data and the operation monitoring data.Type: GrantFiled: March 9, 2022Date of Patent: August 15, 2023Assignee: Shanghai Power Equipment Research Institute Co., LtdInventors: Jinyuan Shi, Xuefei Fan, Yuesheng Xie, Jun Jiang, Luyi Jiang, Zhijie Zhu, Chengyi Zhang, Lin Zhang, Xinxuan Kong, Wangren Xu, Zifang Zhu, Yuxuan Wang
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Publication number: 20230167751Abstract: The present disclosure provides a method of multi-objective and multi-dimensional online joint monitoring for a nuclear turbine. The method includes: obtaining first temperature monitoring data of the nuclear turbine by performing online thermal monitoring on a rotor, a valve cage and a cylinder of the nuclear turbine under quick starting-up; obtaining second temperature monitoring data of tightness of a flange association plane of the cylinder of the nuclear turbine by performing online thermal monitoring on the tightness of the flange association plane; obtaining operation monitoring data of a shafting vibration of a rotor and bearing system of the nuclear turbine by performing online safety monitoring on the shafting vibration of the rotor and bearing system; and optimizing operation and maintenance control of the nuclear turbine according to at least one type of monitoring data among the first temperature monitoring data, the second temperature monitoring data and the operation monitoring data.Type: ApplicationFiled: March 9, 2022Publication date: June 1, 2023Inventors: Jinyuan SHI, Xuefei FAN, Yuesheng XIE, Jun JIANG, Luyi JIANG, Zhijie ZHU, Chengyi ZHANG, Lin ZHANG, Xinxuan KONG, Wangren XU, Zifang ZHU, Yuxuan WANG
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Publication number: 20220077779Abstract: Described herein is a spur-free technique for a switching regulator. The switching regulator may self-adaptively reduce the spur of the output voltage without affecting performance of the switching frequency. The switching regulator may track a coil current and may use an active feedback loop to adaptively generate an artificial coil current, which tracks an amplitude of the coil current but having opposite phase. The artificial coil current may then be injected into an output node to cancel the coil current ripple.Type: ApplicationFiled: September 3, 2021Publication date: March 10, 2022Inventors: Jingwen Mao, Zhijie Zhu
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Publication number: 20210312946Abstract: The disclosure describes a head gimbal assembly including a suspension and a damping layer on a surface of the suspension. The suspension may include a slider mount configured to establish mechanical communication with a slider and the layer may be displaced from the slider mount. The layer may be configured to provide passive damping or active damping.Type: ApplicationFiled: March 29, 2021Publication date: October 7, 2021Inventors: Michael C. McAlpine, Ghazaleh Haghiashtiani, Zhijie Zhu
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Patent number: 10811185Abstract: The subject disclosure provides for utilizing pulse width modulation (PWM) signaling to influence a closed loop of a shunt boost controller and reduce an imbalance of a load. The imbalance reduction helps reduce remanence of a current transformer (CT) and thereby prevent saturation of the CT. A shunt boost controller provides the control signal to control flow of current to the load. A feedback network provides a feedback signal to the shunt boost controller based on a direct current (DC) voltage and causes a power switch circuit to turn on when a magnitude of the feedback signal exceeds a threshold magnitude. The PWM generator supplies a PWM signal to cause the control signal to be provided more symmetrical to the power switch circuit and causes the power switch circuit to turn on more frequently with the control signal to reduce the imbalance of the load.Type: GrantFiled: September 13, 2018Date of Patent: October 20, 2020Assignee: Analog Devices Global Unlimited CompanyInventors: Liuqing Yang, Jian Ye, Zhijie Zhu
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Publication number: 20200090861Abstract: The subject disclosure provides for utilizing pulse width modulation (PWM) signaling to influence a closed loop of a shunt boost controller and reduce an imbalance of a load. The imbalance reduction helps reduce remanence of a current transformer (CT) and thereby prevent saturation of the CT. A shunt boost controller provides the control signal to control flow of current to the load. A feedback network provides a feedback signal to the shunt boost controller based on a direct current (DC) voltage and causes a power switch circuit to turn on when a magnitude of the feedback signal exceeds a threshold magnitude. The PWM generator supplies a PWM signal to cause the control signal to be provided more symmetrical to the power switch circuit and causes the power switch circuit to turn on more frequently with the control signal to reduce the imbalance of the load.Type: ApplicationFiled: September 13, 2018Publication date: March 19, 2020Inventors: Liuqing YANG, Jian YE, Zhijie ZHU
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Publication number: 20200001540Abstract: Systems and techniques are described for additive manufacturing, e.g., 3D printing, a component on an unconstrained freeform build surface. The systems and techniques may allow determining a 3D trajectory and/or deformation of a target deposition region on the build surface by determining a relative location of at least one registration feature on the build surface. Control circuitry may control, based on the 3D trajectory and/or deformation and based on a build model of the component, at least one dispenser to cause dispensing of at least one composition from the at least one dispenser in a predetermined pattern on or adjacent to the target deposition region. The predetermined pattern of the composition defines at least one portion of the component.Type: ApplicationFiled: July 2, 2019Publication date: January 2, 2020Inventors: Michael C. McAlpine, Zhijie Zhu
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Patent number: 9866136Abstract: A power converter can include an electrical isolation circuit between input and output nodes. An input signal monitor node can be provided, such as on a converter output side of the isolation circuit. In an example, a peak detection circuit can be coupled to the input signal monitor node. The output node of the power converter can be configured to supply an output power signal that is a function of an input signal at the input node. The power converter can include multiple, independently-switchable switches at one or more of the input and output sides of the isolation circuit. In an example, the power converter with the input signal monitor node can be configured as a bias supply to provide power, at the output node, to a controller circuit for a main stage power converter circuit.Type: GrantFiled: December 9, 2013Date of Patent: January 9, 2018Assignee: Analog Devices GlobalInventors: Jun Duan, Liuqing Yang, Xudong Huang, Zhijie Zhu, Renjian Xie
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Patent number: 9577509Abstract: An apparatus comprises a switching circuit, an error amplifier circuit, a current threshold circuit, and an over-current detection circuit. The switching circuit provides a switching duty cycle that includes a charge portion and a discharge portion. The error amplifier circuit generates an error signal representative of a difference between a target voltage value and a voltage at an output of the voltage regulator circuit. The switching circuit adjusts the switching duty cycle to regulate the voltage at the output using the error signal and a reference waveform signal. The current threshold circuit generates an adaptive peak current limit threshold. The over-current detection circuit generates an over-current signal when the reference waveform signal satisfies the adaptive peak current limit threshold during the charging portion of the switching cycle. The switching circuit interrupts one or more switching cycles when the reference waveform signal satisfies the adaptive peak current limit threshold.Type: GrantFiled: April 24, 2014Date of Patent: February 21, 2017Assignee: Analog Devices GlobalInventors: Basa Wang, Zhijie Zhu
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Publication number: 20150280544Abstract: An apparatus comprises a switching circuit, an error amplifier circuit, a current threshold circuit, and an over-current detection circuit. The switching circuit provides a switching duty cycle that includes a charge portion and a discharge portion. The error amplifier circuit generates an error signal representative of a difference between a target voltage value and a voltage at an output of the voltage regulator circuit. The switching circuit adjusts the switching duty cycle to regulate the voltage at the output using the error signal and a reference waveform signal. The current threshold circuit generates an adaptive peak current limit threshold. The over-current detection circuit generates an over-current signal when the reference waveform signal satisfies the adaptive peak current limit threshold during the charging portion of the switching cycle. The switching circuit interrupts one or more switching cycles when the reference waveform signal satisfies the adaptive peak current limit threshold.Type: ApplicationFiled: April 24, 2014Publication date: October 1, 2015Inventors: Basa Wang, Zhijie Zhu
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Publication number: 20150162837Abstract: A power converter can include an electrical isolation circuit between input and output nodes. An input signal monitor node can be provided, such as on a converter output side of the isolation circuit. In an example, a peak detection circuit can be coupled to the input signal monitor node. The output node of the power converter can be configured to supply an output power signal that is a function of an input signal at the input node. The power converter can include multiple, independently-switchable switches at one or more of the input and output sides of the isolation circuit. In an example, the power converter with the input signal monitor node can be configured as a bias supply to provide power, at the output node, to a controller circuit for a main stage power converter circuit.Type: ApplicationFiled: December 9, 2013Publication date: June 11, 2015Applicant: Analog Devices TechnologyInventors: Jun Duan, Liuqing Yang, Xudong Huang, Zhijie Zhu, Renjian Xie
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Patent number: 8928303Abstract: Apparatus and methods for generating a drive signal of a switching signal are disclosed. A first circuit receives an oscillating reference signal, a first compensation signal, a second compensation signal, and a third compensation signal. The first compensation signal is indicative of an error between an output voltage of a power converter and a reference voltage. The second compensation signal is indicative of the error relative to a threshold. The third compensation signal is indicative of an output current of the power converter. The first circuit generates a comparison signal having a waveform including pulses having durations based at least partly on a combination of the periodic reference signal, the first compensation signal, the second compensation signal, and the third compensation signal. A second circuit receives a clock signal and the comparison signal and generates a drive signal for activation and deactivation of a driver transistor.Type: GrantFiled: March 14, 2013Date of Patent: January 6, 2015Assignee: Analog Devices TechnologyInventors: Zhijie Zhu, Junxiao Chen, Bin Shao
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Publication number: 20140266122Abstract: Apparatus and methods for generating a drive signal of a switching signal are disclosed. A first circuit receives an oscillating reference signal, a first compensation signal, a second compensation signal, and a third compensation signal. The first compensation signal is indicative of an error between an output voltage of a power converter and a reference voltage. The second compensation signal is indicative of the error relative to a threshold. The third compensation signal is indicative of an output current of the power converter. The first circuit generates a comparison signal having a waveform including pulses having durations based at least partly on a combination of the periodic reference signal, the first compensation signal, the second compensation signal, and the third compensation signal. A second circuit receives a clock signal and the comparison signal and generates a drive signal for activation and deactivation of a driver transistor.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: Analog Devices TechnologyInventors: Zhijie Zhu, Junxiao Chen, Bin Shao