Patents by Inventor Yangfeng Wu

Yangfeng Wu 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).

  • LASER CHIP AND PREPARATION METHOD THEREFOR
    Publication number: 20230043539
    Abstract: Disclosed in the present invention are a laser chip and a preparation method therefor.
    Type: Application
    Filed: February 26, 2021
    Publication date: February 9, 2023
    Inventors: Chao-chen CHENG, Xinqi DING, Yangfeng WU, Wang JIAO, Guibo LIAO, Ju WANG, Qingming TU
  • Method for cemented material dam construction based on whole-process quality control
    Patent number: 10815631
    Abstract: A method for cemented material dam construction based on whole-process quality control includes: determining a water-binder ratio of a sand and gravel material through a simulation test; laying rockfill on the first cemented sand and gravel layer before the final setting time of the first cemented sand and gravel layer; adjusting the maximum particle size of the rockfill and the distance between the particles in the rockfill according to the design requirements; spraying a cement slurry on the rockfill to wrap all the particles in the rockfill and laying a second cemented sand and gravel layer before the initial setting time of the cement slurry; performing rolling compaction on the construction layer until the decline in the thickness of the construction layer and the apparent density of the rolled surface meet the design requirements; and completing the cemented material dam construction.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: October 27, 2020
    Assignee: CHINA INSTITUTE OF WATER RESOURCES AND HYDROPOWER RESEARCH
    Inventors: Jinsheng Jia, Yang Wang, Cuiying Zheng, Shuguang Li, Wanli Shi, Zhongwei Liu, Tianjie Lei, Lianying Ding, Yangfeng Wu