Patents by Inventor Wujun Chen

Wujun 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).

  • Patent number: 11952860
    Abstract: A staged cementing device includes a cylindrical body having an inner chamber. A circulating opening and a liquid inlet recess open to the inner chamber are arranged on a wall of the body. An opening assembly is arranged in the body, which has an opening sleeve and an opening seat located in the opening sleeve. Initially the opening sleeve is connected with the body through a first shear pin and covers the circulating opening, and the opening seat is connected with the opening sleeve through a second shear pin and covers the liquid inlet recess. A packer includes a packing valve body and a packer rubber. The packing valve body includes a flow channel in communication with the liquid inlet recess, and the packer rubber includes a liquid reservoir in communication with the flow channel. The second shear pin is sheared off in response to primary cementing procedure.
    Type: Grant
    Filed: February 1, 2021
    Date of Patent: April 9, 2024
    Assignees: China Petroleum & Chemical Corporation, Sinopec Petroleum Engineering Technology Research Institute Co., Ltd.
    Inventors: Jinli Qin, Yang Liu, Wujun Chen, Ben Liu, Zhaohui Guo, Yanjun Zeng, Ming Liu, Dekai Yang, Yujie Zhu, Hongqian Liao
  • Patent number: 11770524
    Abstract: A loop filter utilized in an encoder includes a constrained directional enhancement filter and a decision circuit. The constrained directional enhancement filter is arranged to process multiple frames, wherein for a first frame in the multiple frames, the constrained directional enhancement filter determines a best filter strength of each block in the first frame in a first filter strength list, and determines a second filter strength list according to content of the first frame. The decision circuit is coupled to the constrained directional enhancement filter, and is arranged to record which index in the first filter strength list is the best filter strength corresponding to each block in the first frame, and provide the first filter strength list and the index corresponding to each block to an encoding circuit of the encoder as an output of the encoder.
    Type: Grant
    Filed: November 11, 2021
    Date of Patent: September 26, 2023
    Assignee: Realtek Semiconductor Corp.
    Inventors: Weimin Zeng, Chi-Wang Chai, Wei Li, Rong Zhang, Wujun Chen
  • Patent number: 11750800
    Abstract: A prediction circuit in an encoder utilizes a specific partition mode to process a super block for generating a plurality of reconstructed pixel values for each block in the super block, and the reconstructed pixel values of each block are directly utilized as reference pixels for other blocks to perform intra-frame prediction, so as to improve the efficiency of the encoder.
    Type: Grant
    Filed: May 30, 2022
    Date of Patent: September 5, 2023
    Assignee: Realtek Semiconductor Corp.
    Inventors: Weimin Zeng, Chi-Wang Chai, Wei Pu, Wujun Chen, Jing Wang, Wei Li
  • Publication number: 20230234721
    Abstract: A tensioning method for a tensegrity keel includes the steps of: (Step 1) determining target values at an attainment of tensegrity; (Step 2) forming an outline of the integral keel; (Step 3) secondarily tensioning a middle stiffening ring through stretching a hub shaft, thereby attaining a self-equilibrium state; (Step 4) providing telescopic rods between stiffening rings and central trusses so that the stiffening rings and the central trusses are connected together; (Step 5) mounting longitudinal ties; (Step 6) releasing constraints on bisection points and the central trusses and tensioning the integral keel by stretching the telescopic rods, thereby introducing tension to the longitudinal ties; (Step 7) secondarily tensioning lateral stiffening rings by stretching the hub shaft, thereby attaining a self-equilibrium state; and (Step 8) making adjustments using iterative methods so that target values at the attainment of tensegrity will be reached.
    Type: Application
    Filed: March 28, 2023
    Publication date: July 27, 2023
    Applicants: SHANGHAI JIAO TONG UNIVERSITY, NEW UNITED GROUP CO., LTD.
    Inventors: Wujun CHEN, Yibei ZHANG, Chengjun GAO, Jianhui HU, Jiandong XU, Jing LIU, Haijun XIANG
  • Publication number: 20230142393
    Abstract: A staged cementing device includes a cylindrical body having an inner chamber. A circulating opening and a liquid inlet recess open to the inner chamber are arranged on a wall of the body. An opening assembly is arranged in the body, which has an opening sleeve and an opening seat located in the opening sleeve. Initially the opening sleeve is connected with the body through a first shear pin and covers the circulating opening, and the opening seat is connected with the opening sleeve through a second shear pin and covers the liquid inlet recess. A packer includes a packing valve body and a packer rubber. The packing valve body includes a flow channel in communication with the liquid inlet recess, and the packer rubber includes a liquid reservoir in communication with the flow channel. The second shear pin is sheared off in response to primary cementing procedure.
    Type: Application
    Filed: February 1, 2021
    Publication date: May 11, 2023
    Inventors: Jinli QIN, Yang LIU, Wujun CHEN, Ben LIU, Zhaohui GUO, Yanjun ZENG, Ming LIU, Dekai YANG, Yujie ZHU, Hongqian LIAO
  • Publication number: 20230141735
    Abstract: A loop filter utilized in an encoder includes a constrained directional enhancement filter and a decision circuit. The constrained directional enhancement filter is arranged to process multiple frames, wherein for a first frame in the multiple frames, the constrained directional enhancement filter determines a best filter strength of each block in the first frame in a first filter strength list, and determines a second filter strength list according to content of the first frame. The decision circuit is coupled to the constrained directional enhancement filter, and is arranged to record which index in the first filter strength list is the best filter strength corresponding to each block in the first frame, and provide the first filter strength list and the index corresponding to each block to an encoding circuit of the encoder as an output of the encoder.
    Type: Application
    Filed: November 11, 2021
    Publication date: May 11, 2023
    Applicant: Realtek Semiconductor Corp.
    Inventors: Weimin Zeng, Chi-Wang Chai, Wei Li, Rong Zhang, Wujun Chen
  • Patent number: 11598702
    Abstract: A double-cross composite fabric membrane biaxial tensile strength test piece is provided, including a core region and four cantilevers. The four cantilevers extend outwards around the core region and form a cross shape. Each cantilever is connected to the core region via an edge transition region. An end portion of the cantilever is a clamping section. The clamping section is provided with a clamping end rubber rod. The clamping end rubber rod is used for connecting to a clamp of a biaxial tensile testing machine. The clamping section is three-layered. The cantilever and the edge transition region are double-layered. The core region is single-layered. The edge transition region is in the shape of a quadrangle rounded at four corners. A manufacturing method of the test piece is also provided.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: March 7, 2023
    Assignee: SHANGHAI JIAO TONG UNIVERSITY
    Inventors: Wujun Chen, Chengjun Gao, Taibai Shi, Pingan Wang, Mei Wang
  • Patent number: 11523117
    Abstract: An encoder includes a frame level processing circuit, a coding tree unit (CTU) level processing circuit and an encoding circuit. The frame level processing circuit is arranged to calculate a bit number of a current frame according a target bitrate and a frame rate, and the frame level processing circuit is further arranged to calculate a quantization parameter of the current frame according to the bit number of the current frame and at least one parameter. The CTU level processing circuit is arranged to use an adaptive quantization mode to adjust the quantization parameter to generate an adjusted quantization parameter. The encoding circuit is arranged to encode the current frame to generate output data according to the adjusted quantization parameter.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: December 6, 2022
    Assignee: Realtek Semiconductor Corp.
    Inventors: Weimin Zeng, Chi-Wang Chai, Wei Li, QingXi He, Wujun Chen, Rong Zhang
  • Publication number: 20220360212
    Abstract: A cleaning robot includes a supporting mechanism, cleaning mechanisms and a walking mechanism. The supporting mechanism is used for supporting the cleaning robot; the cleaning mechanisms are symmetrically arranged at the two ends of the supporting mechanism and can clean the surface of a photovoltaic panel; the walking mechanism is arranged in the middle of the supporting mechanism and can fix the cleaning robot to the surface of the photovoltaic panel and drive the cleaning robot to move on the surface of the photovoltaic panel; and the supporting mechanism can adjust the cleaning ranges of the cleaning mechanisms, so that the cleaning mechanisms at least have a first cleaning range and a second cleaning range, and the first cleaning range and the second cleaning range can be concentric circles. The cleaning robot is small and exquisite in structure and light. One person can operate multiple robots at the same time.
    Type: Application
    Filed: June 17, 2021
    Publication date: November 10, 2022
    Inventors: Xiangbo SHEN, Xiangming DUN, Wujun CHEN, Zhongliang JING, Xiangyong DUN, Lei SHAN, Xincheng LU, Jiageng CHEN, Ying GAO, Sihai ZHOU, Hongbo ZHOU, Zhixiong HU
  • Publication number: 20220303538
    Abstract: An encoder includes a frame level processing circuit, a coding tree unit (CTU) level processing circuit and an encoding circuit. The frame level processing circuit is arranged to calculate a bit number of a current frame according a target bitrate and a frame rate, and the frame level processing circuit is further arranged to calculate a quantization parameter of the current frame according to the bit number of the current frame and at least one parameter. The CTU level processing circuit is arranged to use an adaptive quantization mode to adjust the quantization parameter to generate an adjusted quantization parameter. The encoding circuit is arranged to encode the current frame to generate output data according to the adjusted quantization parameter.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 22, 2022
    Inventors: Weimin Zeng, Chi-Wang Chai, Wei Li, QingXi He, Wujun Chen, Rong Zhang
  • Publication number: 20220187177
    Abstract: A method for determining the equilibrium state of a tensegrity structure includes: determining the critical bending moment that the tensegrity structure bears; calculating the tension of longitudinal tie rods; calculating the pressure of longitudinal compression members; calculating the tensile lengths and the unstressed lengths of the longitudinal tie rods; calculating the compressed lengths and the unstressed lengths of the longitudinal compression members; calculating the forces and the radial deformations of annular compression members; and calculating the positioning lengths and the manufacturing lengths of the longitudinal tie rods and the longitudinal compression members.
    Type: Application
    Filed: March 2, 2022
    Publication date: June 16, 2022
    Applicants: SHANGHAI JIAO TONG UNIVERSITY, NEW UNITED GROUP CO., LTD.
    Inventors: Wujun CHEN, Jianhui HU, Bing ZHAO, Jun YANG, Jiandong XU
  • Publication number: 20220089269
    Abstract: The present invention discloses a large-scale semi-rigid structure airship, relating to the technical field of aerostats, which comprises a ship body, vector side thrusters, a vector tail thruster, an X-shaped inflatable tail fin, air cushions, and a pod, wherein the ship body comprises a pretensioned capsule and a tensegrity keel; the pretensioned capsule is sleeved onto an outer surface of the tensegrity keel in a pretensioning mode; the vector side thrusters are provided at lower-side portions of the ship body; the vector tail thruster is provided at the tail of the ship body; the X-shaped inflatable tail fin is arranged at the tail of the ship body in an X shape; the air cushions are provided at lower portions of the ship body; and the pod is provided at a lower portion of the ship body.
    Type: Application
    Filed: October 7, 2021
    Publication date: March 24, 2022
    Inventors: Wujun Chen, Gongyi Fu, Xiaoliang Wang, Yanguang Wang, Weizhi Wang, Jiandong Xu, Lingchen Tang, Jun Yang
  • Publication number: 20210337192
    Abstract: An image processing method includes: determining a first block and a second block corresponding to a current block; dividing each of the current block, the first block and the second block into a plurality of clusters; for a cluster having a corresponding location within each of the current block, the first block and the second block, performing gradient calculations on pixel values within the cluster of the first block and pixel values within the cluster of the second block, and accordingly determining an adjustment value, wherein a window size of the cluster used in the gradient calculations is one or zero; and for a pixel within the cluster of the current block, referring to a pixel value of the pixel of the first block, a pixel value of the pixel of the second block and the adjustment value to calculate a pixel value of the pixel of the current block.
    Type: Application
    Filed: April 24, 2020
    Publication date: October 28, 2021
    Inventors: Weimin Zeng, Chi-Wang Chai, Wujun Chen, Jing Wang, Rong Zhang
  • Patent number: 11051013
    Abstract: A selection module for selecting an intra mode comprises a histogram of oriented gradient (HOG) module, for receiving a coding unit (CU), to select four angular modes from 33 angular modes of the CU, a DC mode of the CU and a planar mode of the CU; and a decision module, couple to the HOG module, for receiving the six modes from the HOG module, to compare the six modes according to a Split Sum of Absolute Transformed Difference (SSATD) algorithm, to select one of the six modes.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: June 29, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Chi-Wang Chai, Weimin Zeng, Wujun Chen, Jing Wang, Wei Pu
  • Publication number: 20210144368
    Abstract: A selection module for selecting an intra mode comprises a histogram of oriented gradient (HOG) module, for receiving a coding unit (CU), to select four angular modes from 33 angular modes of the CU, a DC mode of the CU and a planar mode of the CU; and a decision module, couple to the HOG module, for receiving the six modes from the HOG module, to compare the six modes according to a Split Sum of Absolute Transformed Difference (SSATD) algorithm, to select one of the six modes.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 13, 2021
    Inventors: Chi-Wang Chai, Weimin Zeng, Wujun Chen, Jing Wang, Wei Pu
  • Patent number: 10972767
    Abstract: A transmitter for handling multiple formats of a video sequence, comprises a preprocessing module, for receiving a first format of a video sequence, to generate metadata of a second format of the video sequence according to the first format of the video sequence and the second format of the video sequence; and an encoder, couple to the preprocessing module, for transmitting the first format of the video sequence and the metadata in a bit stream to a receiver.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: April 6, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Lingzhi Liu, Li Liu, Jing Wang, Wujun Chen, Qingxi He, Wei Pu, Weimin Zeng, Chi-Wang Chai
  • Publication number: 20200116606
    Abstract: Disclosed is a double-cross composite fabric membrane biaxial tensile strength test piece, comprising a core region and four cantilevers. The four cantilevers extend outwards around the core region and form a cross shape. Each cantilever is connected to the core region via an edge transition region. An end portion of the cantilever is a clamping section. The clamping section is provided with a clamping end rubber rod. The clamping end rubber rod is used for connecting to a clamp of a biaxial tensile testing machine. The clamping section is three-layered. The cantilever and the edge transition region are double-layered. The core region is single-layered. The edge transition region is in the shape of a quadrangle rounded at four corners. A manufacturing method of the test piece is also disclosed.
    Type: Application
    Filed: May 23, 2018
    Publication date: April 16, 2020
    Inventors: Wujun CHEN, Chengjun GAO, Taibai SHI, Pingan WANG, Mei WANG
  • Publication number: 20190132617
    Abstract: A transmitter for handling multiple formats of a video sequence, comprises a preprocessing module, for receiving a first format of a video sequence, to generate metadata of a second format of the video sequence according to the first format of the video sequence and the second format of the video sequence; and an encoder, couple to the preprocessing module, for transmitting the first format of the video sequence and the metadata in a bit stream to a receiver.
    Type: Application
    Filed: October 29, 2018
    Publication date: May 2, 2019
    Inventors: Lingzhi Liu, Li Liu, Jing Wang, Wujun Chen, Qingxi He, Wei Pu, Weimin Zeng, Chi-Wang Chai