Patents by Inventor Changmin Chen

Changmin 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: 12036631
    Abstract: The present invention provides a composite static rotary table and a method for protecting a composite static rotary table. The composite static rotary table comprises: a housing body provided with a mounting space; a rotary table body driven by a connecting mandrel to rotate; a base, the connecting mandrel being arranged through the base; an air stopping film arranged between the rotary table body and the base; and an auxiliary supporting assembly fixedly arranged in the mounting space and configured for assisting the rotary table body to be levitated relative to the base. The present invention is intended to solve the problem of ensuring the stable non-contact rotation of the rotary body of the rotary table relative to the base, while improving the bearing capacity of the rotary table.
    Type: Grant
    Filed: August 21, 2023
    Date of Patent: July 16, 2024
    Assignee: NINGBO INTELLIGENT MACHINE TOOL RESEARCH INSTITUTE CO., LTD. OF CHINA NATIONAL MACHINERY INSTITUTE GROUP
    Inventors: Shuangfeng Wu, Hang Shen, Hongwei Xu, Meng Li, Feng Su, Changmin Chen, Wenkang Zhao, Yuzhen Zhou, Xuxiao Lin
  • Patent number: 9961142
    Abstract: A method, device and system disclosed used in storage technique, comprising: splitting a file of size M into k blocks, that is to say, each block is of size M/k; issuing the above k blocks across k different storage nodes in the distributed network storage system in a distributed manner; using the k blocks, constructing n?k independent blocks via linear coding method, and satisfying the property that any k of the n encoded blocks can be used to reconstruct the original data in the file, which means the linear coding method is a kind of Maximum-Distance Separable (MDS) code; distribute the n?k encoded blocks to the rest n?k different storage codes in the distributed network storage systems.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: May 1, 2018
    Assignees: PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL, SHENZHEN IPTV CO., LTD.
    Inventors: Hui Li, Xianxia Huang, Hanxu Hou, Tai Zhou, Bing Zhu, Changmin Chen, Jingbang Zhou
  • Publication number: 20140376366
    Abstract: The present invention relates to IP network communication technology. It provides a kind of IP multicast data layer distribution method and system. The method includes: first code original multicast data into multiple sub-flow, separately specify different shunt sub-source for every sub-flow, distribute sub-group address, create sub-group state, etc, form shunt structure. Then the sink send join news to each shunt sub-source, join each shunt sub-source sub-group and become the leaf node of each sub-tree. And then each shunt sub-source determine the intermediate node according to the port receiving join news and construct multicast distribution-tree. If the overlapping portion between the multicast distribution trees produce congestion, in the congestion nodes network coding is used to eliminate congestion and construct coding sub-tree according to the way of building multicast distribution tree from the below of the coding nodes.
    Type: Application
    Filed: February 22, 2012
    Publication date: December 25, 2014
    Inventors: Hui Li, Yining Li, Changmin Chen, Jingbang Zhou, Huayu Zhang, Junqiu Feng, Yumeng Zhang, Hanxu Hou, Han Guo, Huiyao An
  • Publication number: 20140317222
    Abstract: A method, device and system disclosed used in storage technique, comprising: splitting a file of size M into k blocks, that is to say, each block is of size M/k; issuing the above k blocks across k different storage nodes in the distributed network storage system in a distributed manner; using the k blocks, constructing n?k independent blocks via linear coding method, and satisfying the property that any k of the n encoded blocks can be used to reconstruct the original data in the file, which means the linear coding method is a kind of Maximum-Distance Separable (MDS) code; distribute the n?k encoded blocks to the rest n?k different storage codes in the distributed network storage systems.
    Type: Application
    Filed: February 15, 2012
    Publication date: October 23, 2014
    Inventors: Hui Li, Xianxia Huang, Hanxu Hou, Tai Zhou, Bing Zhu, Changmin Chen, Jingbang Zhou