Patents by Inventor Zhixian Tang

Zhixian Tang 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).

  • Traffic data stream aggregate query method and system
    Patent number: 10558635
    Abstract: A traffic data stream aggregate query method and system includes the steps of acquiring spatial-temporal information of a mobile object to generate a traffic data stream, dividing data space into cells, grouping adjacent cells with similar frequency into few buckets, calculating Kalman gains of the buckets based on frequencies of the buckets, and indexing the buckets using a binary partition tree to form a BPT index of the current timestamp, and serializing the BPT after the end of the current timestamp to form a historical index; and performing aggregate query, wherein an optimum estimation value of the bucket frequency is utilized to replace for calculating when the frequency of the bucket changes a lot. The system includes: an information collection module, a data processing module, an index processing module, an application service module and an index storage module.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: February 11, 2020
    Assignee: Hohai University
    Inventors: Jun Feng, Zhixian Tang, Zhonghua Zhu, Xianyue Zha, Bingshuai Du, Xiao Xu, Chao Wang, Yuelong Zhu, Shijin Li, Dingsheng Wan
  • TRAFFIC DATA STREAM AGGREGATE QUERY METHOD AND SYSTEM
    Publication number: 20170212894
    Abstract: A traffic data stream aggregate query method and system includes the steps of acquiring spatial-temporal information of a mobile object to generate a traffic data stream, dividing data space into cells, grouping adjacent cells with similar frequency into few buckets, calculating Kalman gains of the buckets based on frequencies of the buckets, and indexing the buckets using a binary partition tree to form a BPT index of the current timestamp, and serializing the BPT after the end of the current timestamp to form a historical index; and performing aggregate query, wherein an optimum estimation value of the bucket frequency is utilized to replace for calculating when the frequency of the bucket changes a lot. The system includes: an information collection module, a data processing module, an index processing module, an application service module and an index storage module.
    Type: Application
    Filed: August 5, 2015
    Publication date: July 27, 2017
    Inventors: Jun Feng, Zhixian Tang, Zhonghua Zhu, Xianyue Zha, Bingshuai Du, Xiao Xu, Chao Wang, Yuelong Zhu, Shijin Li, Dingsheng Wan