Patents by Inventor Jianbo Guo
Jianbo Guo 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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Patent number: 11957057Abstract: A CaTiO3-based oxide thermoelectric material and a preparation method thereof are disclosed. The CaTiO3-based oxide thermoelectric material has a chemical formula of Ca1-xLaxTiO3, where 0<x?0.4. The present disclosure makes it possible to prepare a CaTiO3-based thermoelectric material with properties comparable to n-type ZnO, CaTiO3, SrTiO3 and other oxide thermoelectric materials. Among them, the La15 sample has a power factor reaching up to 8.2 ?Wcm?1K?2 (at about 1000 K), and a power factor reaching up to 9.2 ?Wcm?1K?2 at room temperature (about 300 K); and a conductivity reaching up to 2015 Scm?1 (at 300 K). The CaTiO3-based oxide thermoelectric material exhibits the best thermoelectric performance among calcium titanate ceramics. The method for preparing the CaTiO3-based oxide thermoelectric material of the present disclosure is simple in process, convenient in operation, low in cost, and makes it possible to prepare a CaTiO3-based ceramic sheet with high thermoelectric performance.Type: GrantFiled: July 14, 2020Date of Patent: April 9, 2024Assignee: Dalian University of TechnologyInventors: Huijun Kang, Tongmin Wang, Jianbo Li, Zhiqiang Cao, Zongning Chen, Enyu Guo, Yiping Lu, Jinchuan Jie, Yubo Zhang, Tingju Li
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Publication number: 20220245298Abstract: The disclosure discloses a dynamic stability analysis method and device for a linear time-periodic (LTP) system. The method includes the following steps. Calculate the Q matrix corresponding to the LTP system, and use the eigenvalue of Q matrix whose real part is positive as an instability eigenvalue. Each instability eigenvalue is subjected to the following steps. (S1) the state space model is transformed into the infinite-order harmonic state space (HSS) model, and the truncation order m of HSS model is initialized to 1. (S2) after m-th order truncation of the HSS model, its eigenvalue thereof is calculated. If the real part of the eigenvalue of HSS model is not the same as the real part of the instability eigenvalue, m is updated, and step (S2) is performed again; otherwise, modal participation factor analysis is performed to obtain the state variables that dominate the system instability.Type: ApplicationFiled: October 25, 2021Publication date: August 4, 2022Applicants: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, China Electric Power Research Institute, State Grid Anhui Electric Power Research InstituteInventors: Jiabing Hu, Jianhang Zhu, Shicong Ma, Yingbiao Li, Tiezhu Wang, Jianbo Guo, Zhen Wang
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Patent number: 10955980Abstract: A method and a terminal for false touch prevention. The method includes determining a type of a touch operation performed on a touchscreen by a user, correcting a false touch point in a doubtful touch operation based on an occurrence process of a screen point touch event in the doubtful touch operation and a preset determining policy when the touch operation is a doubtful touch operation, and reporting the corrected false touch point.Type: GrantFiled: September 22, 2017Date of Patent: March 23, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Hao Chen, Bifeng Tong, Xiaoxiao Chen, Minghui Jiang, Jianbo Guo, Jie Xu, Aihua Zheng
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Publication number: 20190258380Abstract: A method and a terminal for false touch prevention. The method includes determining a type of a touch operation performed on a touchscreen by a user, correcting a false touch point in a doubtful touch operation based on an occurrence process of a screen point touch event in the doubtful touch operation and a preset determining policy when the touch operation is a doubtful touch operation, and reporting the corrected false touch point.Type: ApplicationFiled: September 22, 2017Publication date: August 22, 2019Inventors: Hao Chen, Bifeng Tong, Xiaoxiao Chen, Minghui Jiang, Jianbo Guo, Jie Xu, Aihua Zheng
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Patent number: 9632114Abstract: This present inversion provides a digital closed-loop fiber optical current sensor. The modulation signal of the optical wave “phase modulator” of the fiber optical current sensor system is modulation square wave, signal processing system extracts any harmonic wave of the photoelectric converter output modulation square waves, and extracts the measured current information from it. The preamplifier of signal processing system is transimpedance amplifier TIA, the bandwidth is extracted 1/650 instantaneous amplitude square wave directly from the modulation square wave (existing), thus the thermal noise of the preamplifier output and shot noise level is reduced to the existing technology of below 1/650; the current-voltage gain of transimpedance amplifier TIA does not depend on the feedback network resistance, thus it can have high current-voltage conversion gain and use low resistance in the feedback network TIA at the same time.Type: GrantFiled: May 10, 2011Date of Patent: April 25, 2017Assignee: China Electric Power Research InstituteInventors: Xiangxun Chen, Jianbo Guo, Ping Jing, Shuo Chen, Shujie Yin, Zhanyuan Liu
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Publication number: 20130278241Abstract: This present inversion provides a digital closed-loop fiber optical current sensor. The modulation signal of the optical wave “phase modulator” of the fiber optical current sensor system is modulation square wave, signal processing system extracts any harmonic wave of the photoelectric converter output modulation square waves, and extracts the measured current information from it. The preamplifier of signal processing system is transimpedance amplifier TIA, the bandwidth is extracted 1/650 instantaneous amplitude square wave directly from the modulation square wave (existing), thus the thermal noise of the preamplifier output and shot noise level is reduced to the existing technology of below 1/650; the current-voltage gain of transimpedance amplifier TIA does not depend on the feedback network resistance, thus it can have high current-voltage conversion gain and use low resistance in the feedback network TIA at the same time.Type: ApplicationFiled: May 10, 2011Publication date: October 24, 2013Applicant: China Electric Power Research InstituteInventors: Xiangxun Chen, Jianbo Guo, Ping Jing, Shuo Chen, Shujie Yin, Zhanyuan Liu
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Patent number: 7746612Abstract: One embodiment of the invention includes a power regulation system. The system comprises a power regulator configured to periodically generate a switch signal that regulates a current flow through an inductor to set a magnitude of an output voltage. The system further comprises an overvoltage protection circuit configured to monitor a peak voltage magnitude of the switch signal and to generate an overvoltage indication signal in response to the peak voltage magnitude of the switch signal exceeding a predetermined limit.Type: GrantFiled: November 6, 2008Date of Patent: June 29, 2010Assignee: Texas Instruments IncorporatedInventors: Jingwei Xu, Jian Wang, Jianbo Guo
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Publication number: 20090116159Abstract: One embodiment of the invention includes a power regulation system. The system comprises a power regulator configured to periodically generate a switch signal that regulates a current flow through an inductor to set a magnitude of an output voltage. The system further comprises an overvoltage protection circuit configured to monitor a peak voltage magnitude of the switch signal and to generate an overvoltage indication signal in response to the peak voltage magnitude of the switch signal exceeding a predetermined limit.Type: ApplicationFiled: November 6, 2008Publication date: May 7, 2009Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Jingwei Xu, Jian Wang, Jianbo Guo