Patents by Inventor Lijun Chen
Lijun Chen 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: 20230051005Abstract: A method for authenticating a passive RFID tag includes acquiring a tag fingerprint of a first tag as a first tag fingerprint, the first tag being the genuine tag; acquiring a tag fingerprint of a second tag as a second tag fingerprint, the second tag being the tag to be authenticated; comparing the first tag fingerprint with the second tag fingerprint: if the first tag fingerprint is consistent with the second tag fingerprint, determining that the second tag is a genuine tag, otherwise determining the second tag is a forged tag. The tag fingerprint is the persistence time enabling the passive RFID tag to operate normally during discharge after fully charging. The beneficial effects include being high in robustness to the change of environment and high in authentication accuracy and capable of being directly deployed on an existing commercial RFID device without modifying hardware of the tag and reader.Type: ApplicationFiled: February 22, 2020Publication date: February 16, 2023Inventors: Jia LIU, Lijun CHEN, Dong JIANG, Xingyu CHEN
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Patent number: 11323071Abstract: An oscillator includes a resonator, sustaining circuit and detector circuit. The sustaining circuit receives a sense signal indicative of mechanically resonant motion of the resonator generates an amplified output signal in response. The detector circuit asserts, at a predetermined phase of the amplified output signal, one or more control signals that enable an offset-reducing operation with respect to the sustaining amplifier circuit.Type: GrantFiled: March 12, 2021Date of Patent: May 3, 2022Assignee: SiTime CorporationInventors: Aaron Partridge, Sassan Tabatabaei, Lijun Chen, Kamran Souri
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Patent number: 11256225Abstract: The present invention discloses a data transmission apparatus of a circuit breaker controller. The data transmission apparatus comprises: a first component having a first power supply and a second component having a second power supply. The first component and the second component share a storage device. The second component is connected to a main circuit of the circuit breaker controller. The second component collects parameters of the main circuit and stores the parameters in the storage device. The second power supply powers the second component and is powered by the main circuit. The first component is connected to a communication device. The first component establishes data transmission between the communication device and the storage device. The first power supply powers the first component and is powered by an external power supply. The second power supply is connected to the first power supply and transmits a control signal to the first power supply.Type: GrantFiled: July 3, 2017Date of Patent: February 22, 2022Assignees: SEARI ELECTRIC TECHNOLOGY CO., LTD., ZHEJIANG CHINT ELECTRICS CO., LTD.Inventors: Xianjun Yi, Lijun Chen, Ying Jun Yin
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Patent number: 11228180Abstract: Embodiments of the disclosure provide for hierarchically distributed voltage regulation and power flow optimization in a power distribution network. According to one embodiment, a regional coordinator system may determine power flow for an autonomous grid (AG) representing a portion of the distribution network based on a set of voltage parameters from nodes in the AG. The set of voltage parameters my include a current voltage magnitude. The regional coordinator system may provide, to a central controller system of the distribution network, one or more power flow parameters based on the determined power flow for the AG.Type: GrantFiled: July 9, 2020Date of Patent: January 18, 2022Assignees: Alliance for Sustainable Energy, LLC, The Regents of the University of Colorado, a body corporateInventors: Xinyang Zhou, Changhong Zhao, Zhiyuan Liu, Lijun Chen
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Patent number: 11218489Abstract: The present application provides a service processing method, apparatus and server, and the method includes: when a first user logs on a client device based on a first account, receiving an operation request for requesting a service operation from the first user; according to the first account, searching account binding relationship which has been stored; if a second account of a second user bound with the first account is found, permitting the first user to accomplish the service operation using the second account authority of the second account; after the first user accomplishes the service operation using the second account authority of the second account, updating the second account information of the second account according to the operation result of the service operation.Type: GrantFiled: April 7, 2021Date of Patent: January 4, 2022Assignee: ADVANCED NEW TECHNOLOGIES CO., LTD.Inventors: Lijun Chen, Lingling Ye
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Publication number: 20210226958Abstract: The present application provides a service processing method, apparatus and server, and the method includes: when a first user logs on a client device based on a first account, receiving an operation request for requesting a service operation from the first user; according to the first account, searching account binding relationship which has been stored; if a second account of a second user bound with the first account is found, permitting the first user to accomplish the service operation using the second account authority of the second account; after the first user accomplishes the service operation using the second account authority of the second account, updating the second account information of the second account according to the operation result of the service operation.Type: ApplicationFiled: April 7, 2021Publication date: July 22, 2021Inventors: LIJUN CHEN, LINGLING YE
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Patent number: 11005422Abstract: An oscillator includes a resonator, sustaining circuit and detector circuit. The sustaining circuit receives a sense signal indicative of mechanically resonant motion of the resonator generates an amplified output signal in response. The detector circuit asserts, at a predetermined phase of the amplified output signal, one or more control signals that enable an offset-reducing operation with respect to the sustaining amplifier circuit.Type: GrantFiled: March 3, 2020Date of Patent: May 11, 2021Assignee: SiTime CorporationInventors: Aaron Partridge, Sassan Tabatabaei, Lijun Chen, Kamran Souri
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Patent number: 11004017Abstract: A library book reservation method based on ultra high frequency RFID technology, including the following steps: step 1, using an RFID tag adhered on each book by using an RFID reading device, wherein the information read by the RFID reading device corresponding to each group of books includes ID information id of the tags, collecting the phase difference ? of the current tag, collecting the current time t of the current tag, and using Tag=<id, t, ?> to represent the read information of the RFID reading device corresponding to each group of books; step 2, sorting triples; and step 3, obtaining a phase change rule of the books, establishing a model, and analyzing the position relation between an RFID antenna and the books to sort the books.Type: GrantFiled: June 29, 2016Date of Patent: May 11, 2021Assignee: UNIVERSITYInventors: Lijun Chen, Yuanjie Luo, Qingpu Shi, Linghao Wan, Ying Li, Xi Chen, Afan Zeng, Bin Wang
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Patent number: 11005848Abstract: The present application provides a service processing method, apparatus and server, and the method includes: when a first user logs on a client device based on a first account, receiving an operation request for requesting a service operation from the first user; according to the first account, searching account binding relationship which has been stored; if a second account of a second user bound with the first account is found, permitting the first user to accomplish the service operation using the second account authority of the second account; after the first user accomplishes the service operation using the second account authority of the second account, updating the second account information of the second account according to the operation result of the service operation.Type: GrantFiled: June 3, 2019Date of Patent: May 11, 2021Assignee: ADVANCED NEW TECHNOLOGIES CO., LTD.Inventors: Lijun Chen, Lingling Ye
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Publication number: 20210070660Abstract: An economical high-strength quick-hardening grouting material includes ordinary Portland cement, a quick-hardening sulphoaluminate gelling agent and water. The ratio of the mass of water to the sum of the mass of the ordinary Portland cement and the mass of quick hardening sulphoaluminate gelling agent is 0.46:1. The ratio of the mass of the quick-hardening sulphoaluminate gelling agent to the mass of the ordinary Portland cement is (0.67-1.5):1. The initial setting time of the grouting reinforcement material is 40±5 min, and the average compressive strength of a cube solidified for 4 hours is higher than or equal to 10 MPa.Type: ApplicationFiled: June 14, 2019Publication date: March 11, 2021Inventors: Jianxun CHEN, Lijun CHEN, Yanbin LUO, Weiwei LIU, Chuanwu WANG
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Publication number: 20210067871Abstract: A method and device for positioning a sound source by using a fisheye lens. The method is used for positioning a sound source for an incident straight line or an incidence angle of a sound wave in conjunction with a fisheye lens. The method and device for positioning the sound source by using the fisheye lens as provided by the present invention have the following advantages, that include, but are not limited to the followings: the method and device for positioning the sound source by using the fisheye lens as provided by the present invention make use of the characteristics of the fisheye lens to realize angular positioning instead of positional positioning.Type: ApplicationFiled: November 19, 2019Publication date: March 4, 2021Inventor: Lijun CHEN
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Patent number: 10917719Abstract: A method and device for positioning a sound source by using a fisheye lens. The method is used for positioning a sound source for an incident straight line or an incidence angle of a sound wave in conjunction with a fisheye lens. The method and device for positioning the sound source by using the fisheye lens as provided by the present invention have the following advantages, that include, but are not limited to the followings: the method and device for positioning the sound source by using the fisheye lens as provided by the present invention make use of the characteristics of the fisheye lens to realize angular positioning instead of positional positioning.Type: GrantFiled: November 19, 2019Date of Patent: February 9, 2021Inventor: Lijun Chen
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Publication number: 20210013720Abstract: Embodiments of the disclosure provide for hierarchically distributed voltage regulation and power flow optimization in a power distribution network. According to one embodiment, a regional coordinator system may determine power flow for an autonomous grid (AG) representing a portion of the distribution network based ona set of voltage parameters from nodes in the AG. The set of voltage parameters my include a current voltage magnitude. The regional coordinator system may provide, to a central controller system of the distribution network, one or more power flow parameters based on the determined power flow for the AG.Type: ApplicationFiled: July 9, 2020Publication date: January 14, 2021Inventors: Xinyang ZHOU, Changhong ZHAO, Zhiyuan LIU, Lijun CHEN
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Publication number: 20200243588Abstract: A package and a packaging method are provided. The package includes a chip unit, a protective cover plate, and an adhesive unit. The chip unit has a first surface, where the first surface includes a device region. The protective cover plate has a second surface opposite to the first surface of the chip unit. The adhesive unit is located between the first surface of the chip unit and the second surface of the protective cover plate and is configured to bond the chip unit with the protective cover plate. The adhesive unit includes a first region and a second region having different viscosities.Type: ApplicationFiled: May 25, 2017Publication date: July 30, 2020Applicant: China Wafer Level CSP Co., Ltd.Inventors: Zhiqi Wang, Zhuowei Wang, Lijun Chen
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Patent number: 10622945Abstract: An oscillator includes a resonator, sustaining circuit and detector circuit. The sustaining circuit receives a sense signal indicative of mechanically resonant motion of the resonator generates an amplified output signal in response. The detector circuit asserts, at a predetermined phase of the amplified output signal, one or more control signals that enable an offset-reducing operation with respect to the sustaining amplifier circuit.Type: GrantFiled: July 26, 2018Date of Patent: April 14, 2020Assignee: SiTime CorporationInventors: Aaron Partridge, Sassan Tabatabaei, Lijun Chen, Kamran Souri
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Publication number: 20190289015Abstract: The present application provides a service processing method, apparatus and server, and the method includes: when a first user logs on a client device based on a first account, receiving an operation request for requesting a service operation from the first user; according to the first account, searching account binding relationship which has been stored; if a second account of a second user bound with the first account is found, permitting the first user to accomplish the service operation using the second account authority of the second account; after the first user accomplishes the service operation using the second account authority of the second account, updating the second account information of the second account according to the operation result of the service operation.Type: ApplicationFiled: June 3, 2019Publication date: September 19, 2019Inventors: LIJUN CHEN, LINGLING YE
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Patent number: 10406870Abstract: This invention discloses an automatic locking device for snow anti-skid chains. Wherein the snow anti-skid chain comprises a ratchet wheel lock catch and a anti-skid chain; the anti-skid chain is respectively fixed at the buckle and the outer part of the housing aforesaid, and extends towards three directions. The ratchet wheel lock catch is used to make the anti-skid chain to attach to automobile tires firmly and is controlled by pressing two buttons on its lower side, which is different from existing operational actions of braking off and twisting. The pressing action is simple and available for one hand operation. The overall structure is simple and reliable, conforming to use habits of control actions by users.Type: GrantFiled: September 11, 2017Date of Patent: September 10, 2019Inventors: Lijun Chen, Yonggang Liu
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Publication number: 20190265667Abstract: The present invention discloses a data transmission apparatus of a circuit breaker controller. The data transmission apparatus comprises: a first component having a first power supply and a second component having a second power supply. The first component and the second component share a storage device. The second component is connected to a main circuit of the circuit breaker controller. The second component collects parameters of the main circuit and stores the parameters in the storage device. The second power supply powers the second component and is powered by the main circuit. The first component is connected to a communication device. The first component establishes data transmission between the communication device and the storage device. The first power supply powers the first component and is powered by an external power supply. The second power supply is connected to the first power supply and transmits a control signal to the first power supply.Type: ApplicationFiled: July 3, 2017Publication date: August 29, 2019Applicants: SEARI ELECTRIC TECHNOLOGY CO., LTD., ZHEJIANG CHINT ELECTRICS CO., LTD.Inventors: Xianjun Yi, Lijun Chen, Yingjun Yin
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Patent number: 10389726Abstract: The present application provides a service processing method, apparatus and server, and the method includes: when a first user logs on a client device based on a first account, receiving an operation request for requesting a service operation from the first user; according to the first account, searching account binding relationship which has been stored; if a second account of a second user bound with the first account is found, permitting the first user to accomplish the service operation using the second account authority of the second account; after the first user accomplishes the service operation using the second account authority of the second account, updating the second account information of the second account according to the operation result of the service operation.Type: GrantFiled: August 11, 2015Date of Patent: August 20, 2019Assignee: ALIBABA GROUP HOLDING LIMITEDInventors: Lijun Chen, Lingling Ye
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Patent number: 10280749Abstract: A method for deformation control of large-span tunnel in chlorite schist stratum. The method divides the large deformation of large-span tunnel in chlorite schist stratum into five deformation grades according to the surrounding rock conditions of the tunnel. In response to each deformation grade, the deformation control of large-span tunnel is determined so as to ensure the safety and stability of the tunnel support structure and to avoid the clearance intrusion caused by tunnel deformation.Type: GrantFiled: January 12, 2018Date of Patent: May 7, 2019Assignee: CHANG'AN UNIVERISTYInventors: Jianxun Chen, Lijun Chen, Yanbin Luo, Pei Huang, Chaoxuan Zhang, Mengen Qin