Patents by Inventor Aimin Liu

Aimin 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).

  • Patent number: 12180668
    Abstract: Method for predicting a stability of a steel cylinder including: in response to the steel cylinder tilting toward a seaward side at an arbitrary rotation point, obtaining a safety factor for the steel cylinder tilting toward the seaward side by determining an anti-tilt moment and a tilt moment when the steel cylinder is tilted to the seaward side; under a same rotation point, in response to determining that the steel cylinder is rotated toward a land side, determining the safety factor for the steel cylinder tilting toward the land side; taking a smaller safety factor as the safety factor under the rotation point; re-selecting a new rotation point, determining a safety factor corresponding to the new rotation point, and taking a safety factor with a smallest value among all rotation points as a final safety factor; and generating, based on the final safety factor, an anti-tilt instruction.
    Type: Grant
    Filed: April 23, 2024
    Date of Patent: December 31, 2024
    Assignees: TIANJIN PORT ENGINEERING INSTITUTE CO., LTD. OF CCCC FIRST HARBOR ENGINEERING CO., LTD., CCCC FIRST HARBOR ENGINEERING CO., LTD., TIANJIN PORT ENGINEERING QUALITY TESTING CENTER CO., LTD.
    Inventors: Changyi Yu, Wei Pan, Yiyong Li, Naishou Zhang, Yonghua Cao, Aimin Liu, Changxi Yue, Xiaoqiang Kou, Zhijun Chen, Binbin Xu
  • Patent number: 12107664
    Abstract: A method for piloting from bypass in a network based on a satellite load platform can unify the influence of distance change and Doppler frequency shift of satellite ground stations in the whole network, and realize accurate quasi synchronization between the clock of the whole network and the clock of the satellite. The method includes transmitting a pilot signal from bypass based on a satellite load platform in a satellite communication system, taking a spaceborne high stability timing clock source as a reference, and transmitting the pilot signal to all downlink beams to provide the pilot signal for all satellite stations covered by the satellite.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: October 1, 2024
    Assignees: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye Jin, Guocheng Lv, Aimin Liu, Baoji Wang, Tao He, Mingke Dong
  • Patent number: 12081315
    Abstract: A method for quasi-synchronous code division multiple access based on synchronization clock by piloting can make CDMA operate in quasi-synchronous conditions, so it is suitable for open wireless channels with relay nodes, such as satellite communication systems, and open wireless channels without relay nodes. The method includes: adopting a mode of CDMA spread spectrum transmission to share power resources to transmit signals at multiple transmitting stations in open wireless channels; adopting an external pilot signal to provide synchronization clock for the CDMA signals transmitted by multiple terminal stations in the open wireless channels, eliminating path delay differences from the multiple terminal stations to a relay node or receiving station, and making multi-channel CDMA signals received at the relay node or receiving station clock synchronized and phase aligned. The method can realize the quasi-synchronous reception of multi-channel CDMA signals.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: September 3, 2024
    Assignees: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye Jin, Guocheng Lv, Aimin Liu, Mingke Dong, Baoji Wang, Tao He
  • Publication number: 20240279899
    Abstract: Method for predicting a stability of a steel cylinder including: in response to the steel cylinder tilting toward a seaward side at an arbitrary rotation point, obtaining a safety factor for the steel cylinder tilting toward the seaward side by determining an anti-tilt moment and a tilt moment when the steel cylinder is tilted to the seaward side; under a same rotation point, in response to determining that the steel cylinder is rotated toward a land side, determining the safety factor for the steel cylinder tilting toward the land side; taking a smaller safety factor as the safety factor under the rotation point; re-selecting a new rotation point, determining a safety factor corresponding to the new rotation point, and taking a safety factor with a smallest value among all rotation points as a final safety factor; and generating, based on the final safety factor, an anti-tilt instruction.
    Type: Application
    Filed: April 23, 2024
    Publication date: August 22, 2024
    Applicants: TIANJIN PORT ENGINEERING INSTITUTE CO., LTD. OF CCCC FIRST HARBOR ENGINEERING CO., LTD., CCCC FIRST HARBOR ENGINEERING CO., LTD., TIANJIN PORT ENGINEERING QUALITY TESTING CENTER CO., LTD.
    Inventors: Changyi YU, Wei PAN, Yiyong LI, Naishou ZHANG, Yonghua CAO, Aimin LIU, Changxi YUE, Xiaoqiang KOU, Zhijun CHEN, Binbin XU
  • Patent number: 11974260
    Abstract: A method for allocating resource and accessing in open wireless channels includes: covering multiple types of user terminal stations in open wireless channels; making dynamic adaptive matching according to comprehensive change factors of a transmitting end and a receiving end in each communication process. The factors of the transmitting end mean that a type and transmitting capacity of a transmitting station are changed, a current state of the wireless channel between the transmitting station and a relay node is changed, a working state of a receiving end of the relay node is changed, and user services to be transmitted are changed; the factors of the receiving end mean that a type and receiving capacity of a receiving station are changed, a current state of the channel from the relay node to the receiving station is changed, and a working state of a transmitting end of the relay node is changed.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: April 30, 2024
    Assignees: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye Jin, Baoji Wang, Guocheng Lv, Tao He, Aimin Liu, Mingke Dong
  • Patent number: 11888512
    Abstract: A method for piloting from bypass in a network with open wireless channels is disclosed. The method includes: 1) selecting a terminal station as a reference in open wireless channels, and sending a pilot signal, in which all or some frequency bands of open wireless channels occupied by the pilot signal are pilot frequency bands, and the proportion of power of the pilot signal to the total power of the pilot frequency bands is 0.1‰-5%; 2) spreading the pilot signal with a spread spectrum code when it is transmitted, and then superimposing on a communication signal in the pilot frequency bands in a low power spectrum signal mode similar with noise; and 3) providing pilot, carrier wave and clock synchronization, standard timing and indication information for network construction and mutual communication of multiple types of terminal stations in channels by the pilot signal.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: January 30, 2024
    Assignees: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye Jin, Tao He, Guocheng Lv, Aimin Liu, Baoji Wang, Mingke Dong
  • Patent number: 11821885
    Abstract: The disclosure discloses a test method for simulating sediment pollutant release under the effect of river channel erosion, which comprises preparing a test device, presetting a water depth and a flow velocity in a test water tank, and calculating a flow rate in the test water tank; paving the sediment in a sediment storage box, and covering an upper surface of the sediment with a water baffle; adding water into the test water tank until a preset water depth, starting a variable speed motor to drive a flow-making propeller to run to make the flow rate reach the required flow rate and keep the flow velocity constant; after the water flow becomes constant, the water baffle retracting to expose the surface of the sediment; opening sampling ports for layered sampling; measuring water; and respectively measuring concentration variation and vertical distribution features of sediment pollutant under different simulated power conditions.
    Type: Grant
    Filed: February 8, 2023
    Date of Patent: November 21, 2023
    Assignees: TIANJIN PORT ENGINEERING INSTITUTE CO., LTD. OF CCCC FIRST HARBOR ENGINEERING CO., LTD, CCCC FIRST HARBOR ENGINEERING CO., LTD., TIANJIN PORT ENGINEERING QUALITY TESTING CENTER CO., LTD., CHANGJIANG WUHAN WATERWAY ENGINEERING COMPANY
    Inventors: Zhichao Dong, Danzhong Liu, Jinfang Hou, Aimin Liu, Binbin Xu
  • Publication number: 20230184735
    Abstract: The disclosure discloses a test method for simulating sediment pollutant release under the effect of river channel erosion, which comprises preparing a test device, presetting a water depth and a flow velocity in a test water tank, and calculating a flow rate in the test water tank; paving the sediment in a sediment storage box, and covering an upper surface of the sediment with a water baffle; adding water into the test water tank until a preset water depth, starting a variable speed motor to drive a flow-making propeller to run to make the flow rate reach the required flow rate and keep the flow velocity constant; after the water flow becomes constant, the water baffle retracting to expose the surface of the sediment; opening sampling ports for layered sampling; measuring water; and respectively measuring concentration variation and vertical distribution features of sediment pollutant under different simulated power conditions.
    Type: Application
    Filed: February 8, 2023
    Publication date: June 15, 2023
    Applicants: TIANJIN PORT ENGINEERING INSTITUTE CO., LTD. OF CCCC FIRST HARBOR ENGINEERING CO., LTD., CCCC FIRST HARBOR ENGINEERING CO., LTD., TIANJIN PORT ENGINEERING QUALITY TESTING CENTER CO., LTD., CHANGJIANG WUHAN WATERWAY ENGINEERING COMPANY
    Inventors: Zhichao DONG, Danzhong LIU, Jinfang HOU, Aimin LIU, Binbin XU
  • Publication number: 20220278744
    Abstract: A method for quasi-synchronous code division multiple access based on synchronization clock by piloting can make CDMA operate in quasi-synchronous conditions, so it is suitable for open wireless channels with relay nodes, such as satellite communication systems, and open wireless channels without relay nodes. The method includes: adopting a mode of CDMA spread spectrum transmission to share power resources to transmit signals at multiple transmitting stations in open wireless channels; adopting an external pilot signal to provide synchronization clock for the CDMA signals transmitted by multiple terminal stations in the open wireless channels, eliminating path delay differences from the multiple terminal stations to a relay node or receiving station, and making multi-channel CDMA signals received at the relay node or receiving station clock synchronized and phase aligned. The method can realize the quasi-synchronous reception of multi-channel CDMA signals.
    Type: Application
    Filed: July 28, 2020
    Publication date: September 1, 2022
    Applicants: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye JIN, Guocheng LV, Aimin LIU, Mingke DONG, Baoji WANG, Tao HE
  • Publication number: 20220272703
    Abstract: A method for allocating resource and accessing in open wireless channels includes: covering multiple types of user terminal stations in open wireless channels; making dynamic adaptive matching according to comprehensive change factors of a transmitting end and a receiving end in each communication process. The factors of the transmitting end mean that a type and transmitting capacity of a transmitting station are changed, a current state of the wireless channel between the transmitting station and a relay node is changed, a working state of a receiving end of the relay node is changed, and user services to be transmitted are changed; the factors of the receiving end mean that a type and receiving capacity of a receiving station are changed, a current state of the channel from the relay node to the receiving station is changed, and a working state of a transmitting end of the relay node is changed.
    Type: Application
    Filed: July 28, 2020
    Publication date: August 25, 2022
    Applicants: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye JIN, Baoji WANG, Guocheng LV, Tao HE, Aimin LIU, Mingke DONG
  • Publication number: 20220247482
    Abstract: A method for piloting from bypass in a network based on a satellite load platform can unify the influence of distance change and Doppler frequency shift of satellite ground stations in the whole network, and realize accurate quasi synchronization between the clock of the whole network and the clock of the satellite. The method includes transmitting a pilot signal from bypass based on a satellite load platform in a satellite communication system, taking a spaceborne high stability timing clock source as a reference, and transmitting the pilot signal to all downlink beams to provide the pilot signal for all satellite stations covered by the satellite.
    Type: Application
    Filed: July 28, 2020
    Publication date: August 4, 2022
    Applicants: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye JIN, Guocheng LV, Aimin LIU, Baoji WANG, Tao HE, Mingke DONG
  • Publication number: 20220247450
    Abstract: A method for piloting from bypass in a network with open wireless channels is disclosed. The method includes: 1) selecting a terminal station as a reference in open wireless channels, and sending a pilot signal, in which all or some frequency bands of open wireless channels occupied by the pilot signal are pilot frequency bands, and the proportion of power of the pilot signal to the total power of the pilot frequency bands is 0.1‰-5%; 2) spreading the pilot signal with a spread spectrum code when it is transmitted, and then superimposing on a communication signal in the pilot frequency bands in a low power spectrum signal mode similar with noise; and 3) providing pilot, carrier wave and clock synchronization, standard timing and indication information for network construction and mutual communication of multiple types of terminal stations in channels by the pilot signal.
    Type: Application
    Filed: July 28, 2020
    Publication date: August 4, 2022
    Applicants: PEKING UNIVERSITY, BEIJING XINXING WEITONG TECHNOLOGY CO., LTD.
    Inventors: Ye JIN, Tao HE, Guocheng LV, Aimin LIU, Baoji WANG, Mingke DONG
  • Patent number: 5849529
    Abstract: Disclosed is a cellobiose phosphorylase gene coding for a protein consisting of the amino acid sequence of SEQ ID NO: 16 as set forth in the Sequence Listing, a plasmid vector comprising the cellobiose phosphorylase gene and a transformant transformed with the plasmid vector.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: December 15, 1998
    Assignee: Director of National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries
    Inventors: Kiyoshi Hayashi, Aimin Liu, Hebiao Li, Kazutomo Haraguchi, Yoshiaki Kitamura