Patents by Inventor Shiqiang Liu

Shiqiang Liu 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).

  • Publication number: 20240107330
    Abstract: Computer-implemented methods for drone-assisted communications networks are provided. Aspects include collecting, from one or more sensing drones, signal strength information for a communications network in a geographic area and creating, based at least in part on the signal strength information, a signal strength map for the geographic area. Aspects also include deploying one or more networking drones into the geographic area, wherein a location of the one or more drones in the geographic area is determined based at least in part on the signal strength map. The one or more networking drones are configured to provide access to the communications network.
    Type: Application
    Filed: September 23, 2022
    Publication date: March 28, 2024
    Inventors: Changchang Liu, Wei-Han Lee, Shiqiang Wang, Seraphin Bernard Calo, Dinesh C. Verma
  • Patent number: 11774505
    Abstract: Disclosed is an estimation method for the safety state of a battery pack based on deep learning and consistency detection, including: acquiring battery parameters of each single battery in the battery pack in a charging process to be identified; calculating multiple groups of feature data according to the battery parameters; constituting a first matrix by the multiple groups of feature data, and calculating a covariance matrix of the first matrix; inputting the covariance matrix into a first trained fully connected layer, so as to extract principal components of the first matrix and obtain a second matrix; multiplying the first matrix and the second matrix to obtain a third matrix; and inputting the third matrix into a series-connected and trained multi-head self-attention layer and classification layer, to identify whether single battery consistency safety hazards exist in the charging process. This embodiment improves the accuracy of identification.
    Type: Grant
    Filed: December 18, 2022
    Date of Patent: October 3, 2023
    Assignees: CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER CO., LTD, CATARC NEW ENERGY VEHICLE TEST CENTER (TIANJIN) CO., LTD., CHINA AUTOMOTIVE INFORMATION TECHNOLOGY (TIANJIN)
    Inventors: Fang Wang, Liang Yang, Shiqiang Liu, Wenbin Wang, Hong Chang, Xiaole Ma, Weina Wang, Yue Xu
  • Publication number: 20220213100
    Abstract: Disclosed are a nitrogen-containing heterocyclic derivative regulator, a preparation method therefor and an application thereof. In particular, disclosed are a compound as represented by general formula (I), a preparation method for the compound and a pharmaceutical composition containing the compound, and the use thereof as a KRAS G12C mutation inhibitor in treatment of diseases or symptoms such as leukemia, neuroblastoma, melanoma, breast cancer, lung cancer and colon cancer, wherein the definitions of substituents in general formula (I) are the same as those in the description.
    Type: Application
    Filed: May 29, 2020
    Publication date: July 7, 2022
    Inventors: Shiqiang LIU, Yongsheng WANG, Yida YUAN, Cheng CEN, Rudi BAO
  • Publication number: 20210355105
    Abstract: The present invention relates to a regulator of nitrogen-containing heteroaromatic derivatives, a preparation method therefor and the use thereof. In particular, the present invention relates to a compound as shown in the general formula (I), a preparation method therefor and a pharmaceutical composition containing the compound, and the use thereof as a protein tyrosine phosphatase-2C (SHP2) inhibitor in the treatment of diseases or conditions such as leukemia, neuroblastoma, melanoma, breast cancer, lung cancer and colorectal cancer, wherein the definition of each substituent in the general formula (I) is the same as that in the description.
    Type: Application
    Filed: October 10, 2019
    Publication date: November 18, 2021
    Inventors: Shiqiang Liu, Yida Yuan, Meng Bao, Shengai Huang, Rudi Bao
  • Publication number: 20200247815
    Abstract: The present invention relates to pyrazolyl-containing tricyclic derivative, a preparation method therefor and the use thereof. In particular, the present invention relates to a compound as shown in the general formula (I), a preparation method therefor and a pharmaceutical composition containing the compound, and the use thereof as a protease such as ERK (MAPK) inhibitor in the treatment of cancers, bone diseases, inflammatory diseases, immunological diseases, nervous system diseases, metabolic diseases, respiratory diseases and heart diseases, wherein the definition of each substituent in the general formula (1) is the same as defined in the description.
    Type: Application
    Filed: October 18, 2018
    Publication date: August 6, 2020
    Inventors: Shiqiang Liu, Yuanfeng Zhou, Yang Liu, Xuesong Wu, Lei Liu, Rudi Bao
  • Patent number: 9118238
    Abstract: An electronic system includes a charge pump driver for generating an output to control an electronic element. The electronic system further includes a clock generator coupled to the charge pump driver. The clock generator can generate a clock signal to control the charge pump driver and adjust a frequency of the clock signal according to a status of the electronic element.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: August 25, 2015
    Assignee: O2Micro, Inc.
    Inventors: Quanwang Liu, Guo Xing Li, Shiqiang Liu
  • Patent number: 8324861
    Abstract: An apparatus includes a plurality of channels, a converter, a control block and a counter. The channels can be used to measure a first plurality of signals. The converter can be used to convert the first plurality of signals into a second plurality of signals. The control block can be used to control the channels and the converter and to determine if any of the channels and the converter experience an abnormal condition. The counter can be used to count the number of times the channels and the converter experience an abnormal condition.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: December 4, 2012
    Assignee: O2Micro Inc.
    Inventors: Xiaohua Huo, Shiqiang Liu, Yingguo Zhang
  • Patent number: 8169249
    Abstract: In a signal monitoring system, a circuit includes an input terminal and an output terminal. In addition, a processor coupled to the circuit is operable for calculating a parameter indicative of an error factor of the circuit by setting a level difference between an input signal at the input terminal and an output signal at the output terminal to a predetermined level.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: May 1, 2012
    Assignee: O2Micro International Limited
    Inventors: Guoxing Li, Quanwang Liu, Shiqiang Liu, Juncai Hu
  • Publication number: 20120013366
    Abstract: In a signal monitoring system, a circuit includes an input terminal and an output terminal. In addition, a processor coupled to the circuit is operable for calculating a parameter indicative of an error factor of the circuit by setting a level difference between an input signal at the input terminal and an output signal at the output terminal to a predetermined level.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Inventors: Guoxing LI, Quanwang LIU, Shiqiang LIU, Juncai HU
  • Patent number: 8030973
    Abstract: In a signal monitoring system, a circuit includes an input terminal and an output terminal. In addition, a processor coupled to the circuit is operable for calculating a parameter indicative of an error factor of the circuit by setting a level difference between an input signal at the input terminal and an output signal at the output terminal to a predetermined level.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: October 4, 2011
    Assignee: O2Micro Inc.
    Inventors: Guoxing Li, Quanwang Liu, Shiqiang Liu, Juncai Hu
  • Publication number: 20110156758
    Abstract: In a signal monitoring system, a circuit includes an input terminal and an output terminal. In addition, a processor coupled to the circuit is operable for calculating a parameter indicative of an error factor of the circuit by setting a level difference between an input signal at the input terminal and an output signal at the output terminal to a predetermined level.
    Type: Application
    Filed: December 29, 2009
    Publication date: June 30, 2011
    Inventors: Guoxing LI, Quanwang LIU, Shiqiang LIU, Juncai HU
  • Patent number: 7701177
    Abstract: A battery pre-charging circuit includes a pre-charging path, a pre-charging switch and a low-voltage pre-charging circuit. The pre-charging path is coupled between a charger and a battery for providing a pre-charging current from the charger to the battery. The pre-charging switch is coupled to the pre-charging path for conducting along the pre-charging path. The low-voltage pre-charging circuit is coupled to the pre-charging switch for controlling the pre-charging switch. The low-voltage pre-charging circuit is configured to switch on the pre-charging switch when the battery voltage is below a first battery voltage level.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: April 20, 2010
    Assignee: O2Micro International Limited
    Inventors: Shiqiang Liu, Guoxing Li, Sean Xiao, Liusheng Liu
  • Patent number: 7642750
    Abstract: A circuit is used for controlling charging and discharging a battery. The circuit comprises a first MOSFET for controlling discharging the battery, and a second MOSFET coupled in series to the battery and the first MOSFET for controlling charging the battery. The first and second MOSFETs have body diodes respectively, and the first body diode of the first MOSFET and the second body diode of the second MOSFET are coupled in opposite directions. A load is coupled to the battery and a common node between the first and second MOSFETs such that power in the battery is delivered to said load when the first MOSFET is turned on. The circuit further comprises a power source coupled to the second switch in series and power is delivered from the power source to the battery when the first and second MOSFETs are turned on.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: January 5, 2010
    Assignee: O2Micro International Limited
    Inventors: Shiqiang Liu, Sean Xiao, Guoxing Li, Liusheng Liu
  • Patent number: 7629771
    Abstract: A protection device for non-common ground buses is disclosed. The protection circuit includes a controller, a level shifter, a first group of switches, and a second group of switches. The controller together with the level shifter controls the first group and second group of switches. The non-common ground buses will be isolated when at least one group of the switches are turned off in an abnormal condition.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: December 8, 2009
    Assignee: O2Micro International, Ltd.
    Inventors: Guoxing Li, Shiqiang Liu, Sean Xiao
  • Publication number: 20090128212
    Abstract: An electronic system includes a charge pump driver for generating an output to control an electronic element. The electronic system further includes a clock generator coupled to the charge pump driver. The clock generator can generate a clock signal to control the charge pump driver and adjust a frequency of the clock signal according to a status of the electronic element.
    Type: Application
    Filed: November 17, 2008
    Publication date: May 21, 2009
    Inventors: Quanwang Liu, Guo Xing Li, Shiqiang Liu
  • Publication number: 20080150487
    Abstract: A battery pre-charging circuit. The pre-charging circuit comprises a pre-charging path, a pre-charging switch and a low-voltage pre-charging circuit. The pre-charging path is coupled between a charger and a battery for providing a pre-charging current from the charger to the battery. The pre-charging switch is coupled to the pre-charging path for conducting along the pre-charging path. The low-voltage pre-charging circuit coupled to the pre-charging switch for controlling the pre-charging switch. The low-voltage pre-charging circuit is configured to switch on the pre-charging switch when a battery voltage over the battery is below a first battery voltage level.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Inventors: Shiqiang Liu, Guoxing Li, Sean Xiao, Liusheng Liu
  • Patent number: 7323853
    Abstract: The present invention is a LDO voltage regulator circuit with common-mode feedback. The LDO voltage regulator includes an error amplifier with a common-mode feedback unit, a pass device and a compensation circuit. A signal from the pass device acts as an input signal to the error amplifier and is compared with another input signal, producing a differential signal. The differential signal is amplified and then provided to the pass device. A capacitor in the compensation unit provides frequency compensation to the LDO voltage regulator. The common-mode feedback unit incorporated into the error amplifier greatly improves a slew rate of a gate voltage of the pass device.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: January 29, 2008
    Assignee: 02Micro International Ltd.
    Inventors: Xiaohu Tang, Wei Wang, XiaoHua Hou, Shiqiang Liu
  • Publication number: 20070188950
    Abstract: A protection device for non-common ground buses is disclosed. The protection circuit includes a controller, a level shifter, a first group of switches, and a second group of switches. The controller together with the level shifter controls the first group and second group of switches. The non-common ground buses will be isolated when at least one group of the switches are turned off in an abnormal condition.
    Type: Application
    Filed: December 27, 2006
    Publication date: August 16, 2007
    Inventors: Liusheng Liu, Guoxing Li, Shiqiang Liu, Sean Xiao
  • Publication number: 20070075684
    Abstract: A circuit is used for controlling charging and discharging a battery. The circuit comprises a first MOSFET for controlling discharging the battery, and a second MOSFET coupled in series to the battery and the first MOSFET for controlling charging the battery. The first and second MOSFETs have body diodes respectively, and the first body diode of the first MOSFET and the second body diode of the second MOSFET are coupled in opposite directions. A load is coupled to the battery and a common node between the first and second MOSFETs such that power in the battery is delivered to said load when the first MOSFET is turned on. The circuit further comprises a power source coupled to the second switch in series and power is delivered from the power source to the battery when the first and second MOSFETs are turned on.
    Type: Application
    Filed: August 22, 2006
    Publication date: April 5, 2007
    Inventors: Shiqiang Liu, Sean Xiao, Guoxing Li, Liusheng Liu
  • Publication number: 20060197513
    Abstract: The present invention is a LDO voltage regulator circuit with common-mode feedback. The LDO voltage regulator includes an error amplifier with a common-mode feedback unit, a pass device and a compensation circuit. A signal from the pass device acts as an input signal to the error amplifier and is compared with another input signal, producing a differential signal. The differential signal is amplified and then provided to the pass device. A capacitor in the compensation unit provides frequency compensation to the LDO voltage regulator. The common-mode feedback unit incorporated into the error amplifier greatly improves a slew rate of a gate voltage of the pass device.
    Type: Application
    Filed: June 30, 2005
    Publication date: September 7, 2006
    Inventors: Xiaohu Tang, Wei Wang, XiaoHua Hou, Shiqiang Liu