Patents by Inventor Qifeng Wang

Qifeng Wang 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: 20200209470
    Abstract: A light guiding structure, a display device and a method of using the same are provided. The light guiding structure includes a housing including an opening; and a first optical fiber structure, an image collection module, a second optical fiber structure, and an image compensation module in the housing. The first optical fiber structure is configured to transmit light incident into the opening to the image collection module; and the second optical fiber structure is configured to transmit an image displayed by the image compensation module to the opening. The display device includes the light guiding structure.
    Type: Application
    Filed: August 6, 2019
    Publication date: July 2, 2020
    Inventors: Fei LI, Binfeng FENG, Qifeng LI, Yonghui LUO, Chao WANG, Ying LIU, Hairui ZHAO, Yupeng CHEN
  • Publication number: 20200209901
    Abstract: Provided is a user side load response method based on adjustment and control on temperature of load clusters. The user side load response method includes: performing thermodynamic modeling on a temperature control load to obtain a temperature control model in direct load control; constructing a mapping quantity to describe the change state of a temperature control load relay switch; obtaining adjustable capacity of the temperature control load through the mapping quantity; introducing temperature control load clusters to solve the problem that control precision cannot satisfy condition requirements; and finally calculating the influence of each load cluster in different load cluster control schemes on comfort degree.
    Type: Application
    Filed: April 30, 2019
    Publication date: July 2, 2020
    Inventors: Jijun YIN, Zuofeng LI, Gang CHEN, Zhenyu CHEN, Haifeng LI, Yefeng JIANG, Lin LIU, Qifeng HUANG, Shufeng LU, Bin YANG, Haowei ZHANG, Xiao CHEN, Qiang ZHOU, Mingfeng XUE, Lingying HUANG, Shihai YANG, Qingshan XU, Minrui XU, Zhixin LI, Shuangshuang ZHAO, Feng WANG, Wenguang CHEN
  • Publication number: 20200164317
    Abstract: Methods for making porous polyelectrolyte complex (PEC) films are provided. In an embodiment, such a method comprises coating the surface of a substrate with a polyelectrolyte (PE) coacervate mixture, the PE coacervate mixture comprising a cationic polymer, an anionic polymer, water, and a salt, the PE coacervate having a salt concentration; exposing the coating to an aqueous medium having another salt concentration, for a time to induce solidification of polyelectrolyte complexes (PECs) in the form of a PEC film having pores distributed throughout, wherein a difference ??C-M #191 between the salt concentration of the PE coacervate mixture and the salt concentration of the aqueous medium is selected to achieve a predetermined porosity for the porous PEC film.
    Type: Application
    Filed: May 9, 2018
    Publication date: May 28, 2020
    Applicant: Northwestern University
    Inventors: Kenneth R. SHULL, Kazi SADMAN, Qifeng WANG
  • Publication number: 20200126239
    Abstract: A computer-implemented method for tracking multiple targets includes identifying a plurality of targets based on a plurality of images obtained from an imaging device carried by an unmanned aerial vehicle (UAV) via a carrier, determining a target group comprising one or more targets from the plurality of targets, and controlling at least one of the UAV or the carrier to track the target group.
    Type: Application
    Filed: December 19, 2019
    Publication date: April 23, 2020
    Inventors: Jie QIAN, Hongda WANG, Qifeng WU
  • Patent number: 10604648
    Abstract: Methods for forming a polyelectrolyte complex (PEC) film are provided. In embodiments, the method comprises applying a potential between a working electrode and a counter electrode, the electrodes in contact with an aqueous polyelectrolyte solution characterized by a bulk pH. The aqueous polyelectrolyte solution comprises a pH sensitive PEC pair comprising an unmodified anionic polymer and a cationic species, an electrochemical pH agent other than water, and a salt. The applied potential induces an electrochemical reaction of the electrochemical pH agent to generate OH? or H+ at the working electrode without inducing water electrolysis in the aqueous polyelectrolyte solution, thereby forming a PEC film from the unmodified anionic polymer and the cationic species on a surface of the working electrode.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: March 31, 2020
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Kenneth R. Shull, Kazi Sadman, Qifeng Wang
  • Publication number: 20200077923
    Abstract: Disclosed herein is a device detecting volatile organic compounds, such as acetone, using nanostructured K2W7O22 crystals. Methods for detecting a subject in a state of ketosis, such as diabetes, using a volatile organic sensing device are disclosed. A method for synthesizing K2W7O22 nanostructured sensing crystals is further disclosed.
    Type: Application
    Filed: September 5, 2019
    Publication date: March 12, 2020
    Inventors: Danling WANG, Qifeng ZHANG
  • Publication number: 20190305555
    Abstract: Provided is a power grid adjustment method based on a load of a variable frequency air conditioner. The method includes: establishing a mathematical simulation model of a virtual synchronous motor in a variable frequency air conditioner controller; establishing a virtual inertia control segment and a droop control segment of power grid adjustment according to the mathematical simulation model; obtaining a reference value ?? of rotation speed variation of a compressor by the virtual inertia control segment; obtaining a reference value ?ref of rotational angular frequency of the compressor by the droop control segment; and inputting a sum of the reference value ?ref of rotational angular frequency of the compressor and the reference value ?? of rotation speed variation of the compressor into a field-oriented controller (FOC) to control rotation of a motor.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 3, 2019
    Inventors: Jijun YIN, Gang CHEN, Xiao LU, Yaohong LI, Qifeng HUANG, Shufeng LU, Bin YANG, Feng YE, Haowei ZHANG, Xiao CHEN, Qiang ZHOU, Mingfeng XUE, Lingying HUANG, Shihai YANG, Qingshan XU, Minrui XU, Zhixin LI, Shuangshuang ZHAO, Feng WANG, Wenguang CHEN
  • Publication number: 20190247192
    Abstract: A prosthetic mitral annuloplasty ring includes a wire, an adjustment member for changing a length of the wire and a jacketing annulus for adjusting a radial dimension of the mitral valve annuloplasty ring. The jacketing annulus is sleeved over the wire and forms, together with the adjustment member, a shape matching that of a native mitral valve annulus. After the prosthetic mitral annuloplasty ring is implanted by suturing in a conventional surgical procedure and the patient's heart starts to beat again, the adjustment member can be connected to the delivery device and the wire length therein can be adjusted by a rotating operation of the delivery device so that the mitral valve annuloplasty ring will be expanded or contracted until the prosthetic mitral annuloplasty ring perfectly fits the native mitral valve annulus in shape, effectively avoiding the problem of incomplete mitral leaflet coaptation.
    Type: Application
    Filed: November 25, 2016
    Publication date: August 15, 2019
    Inventors: Qifeng YU, Lihong HOU, Zhijie WANG, Haishan WANG, Tao QIN
  • Patent number: 10364219
    Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: July 30, 2019
    Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.
    Inventors: Hua Bai, Xuyang Zhao, Yuncai Zhang, Xufei Li, Yong Zhang, Dezhou Xu, Li Zhang, Xiaojie Xu, Qifeng Zhu, Xiaoming Wang, Zhiqing Yang, Zehua Zhong, Jian Zhang
  • Publication number: 20190192293
    Abstract: An artificial cardiac valve is disclosed, which includes an outer stent; an inner stent nested within and connected to the outer stent; leaflets disposed inside the inner stent; and membranes attached to walls of the outer and inner stents. The inner stent is a cylindrical mesh tube, and the outer stent includes a first stent segment, a second stent segment and a third stent segment which are connected sequentially. The first stent segment is a mesh tube. The second stent is a mesh tube having a substantially D-shaped cross-section, and the third stent segment is a flared mesh tube. The first stent segment has a maximum diameter that is equal to a diameter of the second stent segment and to a minimum diameter of the third stent segment. In this stent design, the inner stent can withstand traction forces from the leaflets, and the outer stent is adapted to match the anatomy of the native valve.
    Type: Application
    Filed: October 14, 2016
    Publication date: June 27, 2019
    Inventors: Qifeng YU, Haishan WANG, Yuchen LIANG, Jingyu CHEN, Linan CHANG, Tao QIN
  • Publication number: 20190180079
    Abstract: The present disclosure relates to the field of fingerprint recognition technologies, and provides a fingerprint recognition apparatus and a manufacturing method therefor, a mobile terminal, and a fingerprint lock. The apparatus includes: a substrate defining a protrusion on a surface of the substrate; a fingerprint chip, including: a signal processing circuit connected to the protrusion by passing through a TSV structure, a plurality of sensing electrodes connected to the signal processing circuit, and a protection layer covering the plurality of sensing electrodes; and a touch cover plate located on the protection layer.
    Type: Application
    Filed: August 21, 2018
    Publication date: June 13, 2019
    Applicants: Semiconductor Manufacturing International (Beijing) Corporation, Semiconductor Manufacturing International (Shanghai) Corporation
    Inventors: Wenlei Chen, Qifeng Wang
  • Patent number: 10290865
    Abstract: The present application relates to the technical field of Li-ion battery and, more particularly, to a positive electrode material for a Li-ion battery, a method for preparing the same, and a Li-ion battery containing the same. The positive electrode material for a Li-ion battery includes a substrate material and a coating layer coated on a surface of the substrate material, wherein the coating layer includes boron, a chemical formula of the substrate material is LixNiaCobMncO2, wherein 0.99<x?1.1, 0.3<a<0.9, 0.1<b<0.4, 0.1<c<0.4, and a+b+c=1; and the substrate material consists of a large particle substrate material and a small particle substrate material. In the present application, by gradation of large particles and small particles, the pellet density, the capacity density, the room-temperature cycle performance, the high-temperature cycle performance and low temperature discharging performance of the Li-ion battery are improved.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: May 14, 2019
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Qifeng Li, Dingshan Ruan, Wei Liang, Na Liu, Long Wang
  • Publication number: 20180237632
    Abstract: Methods for forming a polyelectrolyte complex (PEC) film are provided. In embodiments, the method comprises applying a potential between a working electrode and a counter electrode, the electrodes in contact with an aqueous polyelectrolyte solution characterized by a bulk pH. The aqueous polyelectrolyte solution comprises a pH sensitive PEC pair comprising an unmodified anionic polymer and a cationic species, an electrochemical pH agent other than water, and a salt. The applied potential induces an electrochemical reaction of the electrochemical pH agent to generate OH? or H+ at the working electrode without inducing water electrolysis in the aqueous polyelectrolyte solution, thereby forming a PEC film from the unmodified anionic polymer and the cationic species on a surface of the working electrode.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 23, 2018
    Inventors: Kenneth R. Shull, Kazi Sadman, Qifeng Wang
  • Patent number: 9919280
    Abstract: Polyelectrolyte complex microcapsules are prepared by a novel template- and surfactant-free method. The microcapsules are produced spontaneously by ultrasonically spraying a solution of complex into a hot water reservoir which enhances diffusion and relaxation of polymer. The size and wall thickness of microcapsules are precisely controlled. Encapsulation of polymers and nanoparticles by mixing them with polyelectrolyte solutions is demonstrated.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: March 20, 2018
    Assignee: The Florida State University Research Foundation, Inc.
    Inventors: Joseph Schlenoff, Qifeng Wang
  • Patent number: 9698113
    Abstract: A method for treating a chip packaging structure includes providing a chip packaging structure having at least a first electrical connect structure and a second electrical connect structure, and an insulation layer exposing portions of the first electrical connect structure and the second electrical connect structure; selecting a plasma gas based on materials of the first electrical connect structure and the second electrical connect structure and a type of process forming the first electrical connect structure and the second electrical connect structure, wherein metal cations are left on the insulation layer; performing a plasma treatment process using the selected plasma gas on the first electrical connect structure, the second electrical connect structure and the insulation layer, causing reaction of the metal cations to substantially convert the metal cations into electrically neutral materials; and removing the reacted metal cations from the insulation layer.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: July 4, 2017
    Assignee: SEMICONDUCTOR MANUFACTURING INTERNATIONAL (SHANGHAI) CORPORATION
    Inventor: Qifeng Wang
  • Publication number: 20160336285
    Abstract: A method for treating a chip packaging structure includes providing a chip packaging structure having at least a first electrical connect structure and a second electrical connect structure, and an insulation layer exposing portions of the first electrical connect structure and the second electrical connect structure; selecting a plasma gas based on materials of the first electrical connect structure and the second electrical connect structure and a type of process forming the first electrical connect structure and the second electrical connect structure, wherein metal cations are left on the insulation layer; performing a plasma treatment process using the selected plasma gas on the first electrical connect structure, the second electrical connect structure and the insulation layer, causing reaction of the metal cations to substantially convert the metal cations into electrically neutral materials; and removing the reacted metal cations from the insulation layer.
    Type: Application
    Filed: July 28, 2016
    Publication date: November 17, 2016
    Inventor: QIFENG WANG
  • Patent number: 9431215
    Abstract: A method for treating a chip packaging structure includes providing a chip packaging structure having at least a first electrical connect structure and a second electrical connect structure, and an insulation layer exposing portions of the first electrical connect structure and the second electrical connect structure; selecting a plasma gas based on materials of the first electrical connect structure and the second electrical connect structure and a type of process forming the first electrical connect structure and the second electrical connect structure, wherein metal cations are left on the insulation layer; performing a plasma treatment process using the selected plasma gas on the first electrical connect structure, the second electrical connect structure and the insulation layer, causing reaction of the metal cations to substantially convert the metal cations into electrically neutral materials; and removing the reacted metal cations from the insulation layer.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: August 30, 2016
    Assignee: SEMICONDUCTOR MANUFACTURING INTERNATIONAL (SHANGHAI) CORPORATION
    Inventor: Qifeng Wang
  • Publication number: 20160144328
    Abstract: Polyelectrolyte complex microcapsules are prepared by a novel template- and surfactant-free method. The microcapsules are produced spontaneously by ultrasonically spraying a solution of complex into a hot water reservoir which enhances diffusion and relaxation of polymer. The size and wall thickness of microcapsules are precisely controlled. Encapsulation of polymers and nanoparticles by mixing them with polyelectrolyte solutions is demonstrated.
    Type: Application
    Filed: November 3, 2015
    Publication date: May 26, 2016
    Inventors: Joseph Schlenoff, Qifeng Wang
  • Patent number: 9289727
    Abstract: The invention provides a process for fabricating a membrane filter that can stand up to filtration of nanometer-scaled fine particles or organic molecules, and a membrane filter having that filtration feature. Membrane filter 20 is disclosed. There is also the process for fabricating membrane filter 20 disclosed that is characterized by comprising the steps of mixing an aqueous solution containing a metal salt and an aqueous solution containing an alkali to prepare nanostrand solution 32 comprising a metal hydroxide, and filtrating nanostrand solution 32 through porous substrate 2 having pores to fabricate nanostrand sheet 3 comprising an accumulation of fibrous nanostrands on porous substrate 2 wherein the first pore formed between the nanostrands and extending through the nanostrand sheet from one surface side to another surface side has a maximum diameter of up to 5 nm.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: March 22, 2016
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Izumi Ichinose, Xinsheng Peng, Sandeep Ghosh, Qifeng Wang
  • Publication number: 20150325544
    Abstract: A method for treating a chip packaging structure includes providing a chip packaging structure having at least a first electrical connect structure and a second electrical connect structure, and an insulation layer exposing portions of the first electrical connect structure and the second electrical connect structure; selecting a plasma gas based on materials of the first electrical connect structure and the second electrical connect structure and a type of process forming the first electrical connect structure and the second electrical connect structure, wherein metal cations are left on the insulation layer; performing a plasma treatment process using the selected plasma gas on the first electrical connect structure, the second electrical connect structure and the insulation layer, causing reaction of the metal cations to substantially convert the metal cations into electrically neutral materials; and removing the reacted metal cations from the insulation layer.
    Type: Application
    Filed: April 8, 2015
    Publication date: November 12, 2015
    Inventor: QIFENG WANG