Patents by Inventor Xiaorong Sun

Xiaorong Sun 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: 20190240238
    Abstract: The present invention relates to the field of natural medicine and pharmaceutical chemistry, and in particular relates to a cycloartane tetracyclic triterpenoid compound (I), a preparation method thereof and the medical use thereof. The pharmacodynamic tests demonstrate that the compound of the present invention has a pharmacodynamic activity on heart and cerebral vessels and can be used to prevent or treat cardiovascular and/or cerebrovascular diseases such as arrhythmia, myocardial infarction, and coronary heart disease or the like.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 8, 2019
    Inventors: Shanchun Zhang, Shu Gao, Xiaorong Lu, Hongzhang Sun, Yijun Bao, Bin Yang, Jiashi Peng
  • Patent number: 10340373
    Abstract: The present invention relates to the technical field of the power semiconductor device relates to a reverse conducting insulated gate bipolar transistor (RC-IGBT). The RC-IGBT comprises a P-type region, an N-type emitter region, a P-type body contact region, a dielectric trench, a collector region, and an electrical filed cutting-off region. The beneficial effect of the present invention is that, when compared with traditional RC-IGBT, the IGBT of the present invention can eliminate negative resistance effect and effectively improve the performance of forward and reverse conduction.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: July 2, 2019
    Assignee: University of Electronic Science and Technology of China
    Inventors: Xiaorong Luo, Gaoqiang Deng, Kun Zhou, Qing Liu, Linhua Huang, Tao Sun, Bo Zhang
  • Patent number: 5729692
    Abstract: A method and system for generating an optimized solution for assigning traffic loads to channels in SONET rings in cooperation with a computer having sufficient memory. The method and system utilize a Mixed Integer Program (MIP) having corresponding variables necessary to model the cost of Terminal Multiplexers, Add/Drop Multiplexers and corresponding interface ports necessary to route the desired traffic loads. By routing traffic loads to reduce computation time and imposing mathematical bounds on the MIP variables, the number of possible MIP solutions is reduced. The Mixed Integer Program is minimized in accordance with the traffic routing and imposed mathematical bounds such that an electrical signal is generated which corresponds to the optimized traffic load assignment information. The signal is converted to digital format whereupon it may be retrieved from computer memory and displayed to the user.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: March 17, 1998
    Assignee: U. S. West Technologies, Inc.
    Inventors: Yuping Qiu, Jennifer Ryan, Xiaorong Sun, Youngho Lee
  • Patent number: 5615254
    Abstract: Methods and systems of traffic routing in a circuit switched communication network having a plurality of switches and a plurality of trunk groups connecting the switches are disclosed. The methods include a step of determining a set of alternate routing paths for each of a plurality of ordered pairs of the switches, wherein the number of alternate routing paths through each of the trunk groups is constrained to be less than a corresponding first predetermined threshold. In one embodiment, the alternate routing paths are determined by computing a solution to a predetermined integer programming problem. In another embodiment, a heuristic technique is used to determine the alternate routing paths.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: March 25, 1997
    Assignee: U S West Technologies, Inc.
    Inventors: Yuping Qiu, Jennifer Ryan, Xiaorong Sun, George B. Pillsbury, Alex Stevens, Rudy Zubiate
  • Patent number: 5564021
    Abstract: A method for generating an optimized solution for assigning traffic loads to channels in SONET rings in cooperation with a computer having sufficient memory. The method utilizes a Mixed Integer Program (MIP) having corresponding variables necessary to model the cost of Terminal Multiplexers, Add/Drop Multiplexers and corresponding interface ports necessary to route the desired traffic loads. By routing traffic loads to reduce computation time and imposing mathematical bounds on the MIP variables, the number of possible MIP solutions is reduced. The Mixed integer Program is minimized in accordance with the traffic routing and imposed mathematical bounds such that an electrical signal is generated which corresponds to the optimized traffic load assignment information. The signal is converted to digital format whereupon it may be retrieved from computer memory and displayed to the user.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: October 8, 1996
    Assignee: US West Technologies, Inc.
    Inventors: Yuping Qiu, Jennifer Ryan, Xiaorong Sun, Youngho Lee
  • Patent number: 5508999
    Abstract: A method and system is provided for use in cooperation with a computer having a memory for generating an optimized transition plan for the placement and interconnection of carrier hubs in a local access network having a plurality of Central Offices (COs), Serving Wire Centers (SWCs) and Point-of-Presence (POP) exchange carriers such that calls may be routed at least cost. In operation, the total number and location of existing SWCs within the network must be determined along with the total switched and special access demand. Thereafter, known tariff rates for selected channel terminals, transport channels and multiplexers must be determined along with the total number of DS3 lines from each SWC to its corresponding POP. By expressing determined network demand as selected mixed-integer program decision variables and determining a corresponding set of logical constraints consistent with these decision variables, the optimized placement of hubs within the local access network may be determined.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: April 16, 1996
    Assignee: U S WEST Advanced Technologies, Inc.
    Inventors: Louis A. Cox, Jr., Yuping Qiu, George E. Tegan, Xiaorong Sun