Patents by Inventor Weidong Zhu

Weidong Zhu 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: 20220349876
    Abstract: Disclosed is the use of a DKK1 gene or the coded protein inhibitor thereof for the preparation of a composition or formulation used to prevent and/or treat tumor cachexia and diseases associated with diabetes. By inhibiting the expression or activity of the DKK1 gene or the protein encoded thereby in tumor cells, which can effectively prevent and/or treat tumor cachexia and diseases associated with diabetes, also provided is a method for detecting the protein expression level of DKK1 in blood, which level is taken as an indicator for precise treatment and judging prognosis.
    Type: Application
    Filed: April 24, 2020
    Publication date: November 3, 2022
    Applicant: SHANGHAI DONGTSU BIOSCIENCES CO., LTD.
    Inventor: Weidong ZHU
  • Publication number: 20220252151
    Abstract: A tidal current energy converter including an infinitely variable transmission (IVT) control system and a hybrid vertical axis wind (or water) turbine (VAWTs) apparatus. The hybrid VAWT apparatus includes a modified-Savonius (MS) rotor in the central region and a straight bladed H-type Darrieus rotor in the surrounding annular region. The IVT control system includes a nonlinear closed-loop control combined with an integral time-delay feedback control to adjust a speed ratio of the IVT. A speed ratio control for an IVT system involves a forward speed controller and/or a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
    Type: Application
    Filed: April 19, 2022
    Publication date: August 11, 2022
    Inventors: Weidong ZHU, Gang LI, Meilin YU, Xuefeng WANG
  • Publication number: 20220186830
    Abstract: A nonlinear closed-loop control combined with an integral time-delay feedback control is disclosed to adjust a speed ratio of an infinitely variable transmission (IVT) system. A speed ratio control for an IVT system involves a forward speed controller and a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
    Type: Application
    Filed: March 2, 2022
    Publication date: June 16, 2022
    Inventors: Weidong ZHU, Xuefeng WANG, Gang LI
  • Patent number: 11313348
    Abstract: A multi-stage hybrid Darrieus-modified-Savonius (HDMS) vertical axis wind or water turbine (VAWT) for aero-hydro energy harvesting. The HDMS VAWT can continuously harvest fluid energy, including wind and water energy, provides excellent self-starting capability, has enhanced structural stability, and a high energy harvesting efficiency.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: April 26, 2022
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Meilin Yu, Weidong Zhu
  • Patent number: 11297412
    Abstract: Various implementations include loudspeaker drivers. In some aspects, an electro-acoustic driver includes: a cup section; a core section at least partially housed in the cup section, the core section including: a primary magnet; and a coin adjacent to the primary magnet; a bobbin surrounding the core section between the cup section and the core section, where the bobbin and the core section define an inner magnetic gap; a coil surrounding the bobbin and a portion of the core section; and a ferrofluid located at the inner magnetic gap, where the driver has an outer diameter less than or equal to approximately 10 millimeters.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: April 5, 2022
    Assignee: Bose Corporation
    Inventors: Weidong Zhu, Mark Andrew Hayner, Csaba Guthy
  • Patent number: 11268615
    Abstract: A nonlinear closed-loop control combined with an integral time-delay feedback control is disclosed to adjust a speed ratio of an infinitely variable transmission (IVT) system. A speed ratio control for an IVT system involves a forward speed controller and a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: March 8, 2022
    Assignee: University of Maryland, Baltimore County
    Inventors: Weidong Zhu, Xuefeng Wang, Gang Li
  • Publication number: 20210324955
    Abstract: A nonlinear closed-loop control combined with an integral time-delay feedback control is disclosed to adjust a speed ratio of an infinitely variable transmission (IVT) system. A speed ratio control for an IVT system involves a forward speed controller and a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
    Type: Application
    Filed: April 16, 2021
    Publication date: October 21, 2021
    Inventors: Weidong ZHU, Xuefeng WANG, Gang LI
  • Publication number: 20210266659
    Abstract: Various implementations include loudspeaker drivers. In some aspects, an electro-acoustic driver includes: a cup section; a core section at least partially housed in the cup section, the core section including: a primary magnet; and a coin adjacent to the primary magnet; a bobbin surrounding the core section between the cup section and the core section, where the bobbin and the core section define an inner magnetic gap; a coil surrounding the bobbin and a portion of the core section; and a ferrofluid located at the inner magnetic gap, where the driver has an outer diameter less than or equal to approximately 10 millimeters.
    Type: Application
    Filed: February 24, 2020
    Publication date: August 26, 2021
    Inventors: Weidong Zhu, Mark Andrew Hayner, Csaba Guthy
  • Patent number: 11007728
    Abstract: This invention relates to a fiber placement head integrating tow converging mechanism, comprising: fiber placement head mounting base; fixed yarn box component and revolving yarn box component arranged at the side end of the fiber placement head mounting base, tow passage formed between the revolving mounting face of the said fiber placement head mounting base and the relative face of the revolving yarn box component; tow conveying components respectively arranged on the sides of the fixed yarn box component and revolving yarn box component; and tow converging mechanism for guiding and converging tows conveyed by tow conveying components. Through appropriate design of guide pulley and tow passage, the fiber placement head realizes the guiding and converging of multiple tows, avoiding intervening among the tows.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 18, 2021
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Zhenzheng Ke, Liang Cheng, Weidong Zhu, Weiwei Qu, Junxia Jiang, Yinglin Ke, Jiangxiong Li
  • Publication number: 20200343816
    Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for regulated hybrid converters. An example apparatus includes an input terminal; an output terminal, a first converter circuit coupled between the input terminal and an intermediate node, the first converter circuit having a first switch node, a second converter circuit coupled between the intermediate node and the output terminal, the second converter circuit having a second switch node; a first inductor coupled between the first switch node and the second switch node, and a second inductor coupled between the second switch node and the output terminal.
    Type: Application
    Filed: April 26, 2019
    Publication date: October 29, 2020
    Inventors: Wenkai Wu, Shishuo Zhao, Weidong Zhu
  • Publication number: 20200332764
    Abstract: A multi-stage hybrid Darrieus-modified-Savonius (HDMS) vertical axis wind or water turbine (VAWT) for aero-hydro energy harvesting. The HDMS VAWT can continuously harvest fluid energy, including wind and water energy, provides excellent self-starting capability, has enhanced structural stability, and a high energy harvesting efficiency.
    Type: Application
    Filed: April 17, 2020
    Publication date: October 22, 2020
    Inventors: Meilin YU, Weidong ZHU
  • Patent number: 10766210
    Abstract: This invention relates to a cutter device for automated composite material placement equipment, including cutter component, drive mechanism that drives the cutter component to slide, and guide mechanism that provides slide room for the cutter component, the said guide mechanism comprises: cutter stop, base, cover plate arranged on the base, and cutting board arranged between the base and the cover plate; guide groove for accommodating cutter component slide is provided at the said base's contact side with the cutting board; the said cutter stop is arranged at the outer side of the guide groove to limit the cutter component from sliding out; the said cutting board has a protruding part relative to the base and the cover plate, a first tow guide hole is provided on the said protruding part; a second tow guide hole coaxial with the first guide hole is provided at the said cutter stop, a cutter avoidance groove is further provided at the said cutter stop's side close to the cutting board, and the second tow guide
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: September 8, 2020
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Zhenzheng Ke, Yinglin Ke, Liang Cheng, Weidong Zhu, Jiangxiong Li, Weiwei Qu, Huiyue Dong
  • Publication number: 20200195121
    Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for a dynamically adjustable gate driver for switching devices. An example power switching system includes a gate driver circuit including gate driver segments to adjust a transition time of a switch from a first time to a second time in response to a segment control signal, the transition time corresponding to a time to change a state of the switch, and a controller to obtain a first trip signal to indicate that a voltage exceeds a first threshold, obtain a second trip signal to indicate that the voltage is less than a second threshold, and transmit the segment control signal to the gate driver circuit when the switch is to change state and when the voltage exceeds the first threshold or is less than the second threshold.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 18, 2020
    Inventors: Neeraj A. Keskar, Weidong Zhu
  • Patent number: 10651741
    Abstract: An apparatus includes first and second power converter stages, each stage having a primary side and a secondary side. The primary side of the first stage includes a switch T1A coupled to a voltage source and a switch T3A coupled to the switch T1A. The primary side of the second stage includes a switch T2A coupled to the switch T3A and a switch T4A coupled to the switch T3A and to the voltage source. The apparatus includes a control circuit to control an on/off time of the switches. The control circuit includes four gate driver controllers to control the on/off time of the switches and a current sharing control section to increase or decrease the on time of a switch based on a comparison of a current through one of multiple output inductors to an average current through the multiple output inductors.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: May 12, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Wenkai Wu, Shishuo Zhao, Weidong Zhu
  • Patent number: 10632694
    Abstract: This invention relates to a creel structure integrated on the fiber placement head of the automated placement equipment, comprising: fiber placement head mounting base, fixed yarn box component fixed and mounted on fiber placement head mounting base, and revolving yarn box component mounted on fiber placement head mounting base, the said revolving yarn box component is coupled with the fiber placement head mounting base through revolving shaft. This creel structure can avoid intervention that arise due to equipment maintenance and spindle replacement, making equipment maintenance and spindle replacement more convenient and swift.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: April 28, 2020
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Yinglin Ke, Junxia Jiang, Zhenzheng Ke, Jiangxiong Li, Weidong Zhu, Weiwei Qu, Liang Cheng
  • Patent number: 10632693
    Abstract: A fiber coil mounting device is used in automated composite material layup equipment. The fiber coil mounting device includes a fiber coil mounting shaft with axial hollow structure, a fiber stop plate disposed on two sides of the fiber coil mounting shaft, and an anti-slide fiber coil tightening mechanism. The anti-slide fiber coil tightening mechanism includes a piston assembly disposed inside the axial hollow structure, a spring piece disposed on the piston assembly, a driving unit controlling an axial slide of the piston assembly, and a tightening unit driven by an axial force produced by the spring piece during the axial slide of the piston assembly.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: April 28, 2020
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Zhenzheng Ke, Liang Cheng, Weidong Zhu, Weiwei Qu, Yinglin Ke, Junxia Jiang, Jiangxiong Li
  • Publication number: 20200031064
    Abstract: This invention relates to a cutter device for automated composite material placement equipment, including cutter component, drive mechanism that drives the cutter component to slide, and guide mechanism that provides slide room for the cutter component, the said guide mechanism comprises: cutter stop, base, cover plate arranged on the base, and cutting board arranged between the base and the cover plate; guide groove for accommodating cutter component slide is provided at the said base's contact side with the cutting board; the said cutter stop is arranged at the outer side of the guide groove to limit the cutter component from sliding out; the said cutting board has a protruding part relative to the base and the cover plate, a first tow guide hole is provided on the said protruding part; a second tow guide hole coaxial with the first guide hole is provided at the said cutter stop, a cutter avoidance groove is further provided at the said cutter stop's side close to the cutting board, and the second tow guide
    Type: Application
    Filed: November 21, 2018
    Publication date: January 30, 2020
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Zhenzheng Ke, Yinglin Ke, Liang Cheng, Weidong Zhu, Jiangxiong Li, Weiwei Qu, Huiyue Dong
  • Publication number: 20200031062
    Abstract: A fiber coil mounting device is used in automated composite material layup equipment. The fiber coil mounting device includes a fiber coil mounting shaft with axial hollow structure, a fiber stop plate disposed on two sides of the fiber coil mounting shaft, and an anti-slide fiber coil tightening mechanism. The anti-slide fiber coil tightening mechanism includes a piston assembly disposed inside the axial hollow structure, a spring piece disposed on the piston assembly, a driving unit controlling an axial slide of the piston assembly, and a tightening unit driven by an axial force produced by the spring piece during the axial slide of the piston assembly.
    Type: Application
    Filed: November 21, 2018
    Publication date: January 30, 2020
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Zhenzheng Ke, Liang Cheng, Weidong Zhu, Weiwei Qu, Yinglin Ke, Junxia Jiang, Jiangxiong Li
  • Publication number: 20190375169
    Abstract: This invention relates to a fiber placement head integrating tow converging mechanism, comprising: fiber placement head mounting base; fixed yarn box component and revolving yarn box component arranged at the side end of the fiber placement head mounting base, tow passage formed between the revolving mounting face of the said fiber placement head mounting base and the relative face of the revolving yarn box component; tow conveying components respectively arranged on the sides of the fixed yarn box component and revolving yarn box component; and tow converging mechanism for guiding and converging tows conveyed by tow conveying components. Through appropriate design of guide pulley and tow passage, the fiber placement head realizes the guiding and converging of multiple tows, avoiding intervening among the tows.
    Type: Application
    Filed: November 21, 2018
    Publication date: December 12, 2019
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Zhenzheng Ke, Liang Cheng, Weidong Zhu, Weiwei Qu, Junxia Jiang, Yinglin Ke, Jiangxiong Li
  • Publication number: 20190375170
    Abstract: This invention relates to a creel structure integrated on the fiber placement head of the automated placement equipment, comprising: fiber placement head mounting base, fixed yarn box component fixed and mounted on fiber placement head mounting base, and revolving yarn box component mounted on fiber placement head mounting base, the said revolving yarn box component is coupled with the fiber placement head mounting base through revolving shaft. This creel structure can avoid intervention that arise due to equipment maintenance and spindle replacement, making equipment maintenance and spindle replacement more convenient and swift.
    Type: Application
    Filed: November 21, 2018
    Publication date: December 12, 2019
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Yinglin Ke, Junxia Jiang, Zhenzheng Ke, Jiangxiong Li, Weidong Zhu, Weiwei Qu, Liang Cheng