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Research on Top-K Query in RFID Uncertain Data Stream

  • 2013-09-22
  • 724.87KB
  • Points it Requires : 2

In the tourist tracking and tracing system, a large amount of uncertain data is generated. Effective Top-K query processing is an important technology in uncertain data management. This paper studies the problem of using Top-K to retrieve uncertain data, defines the query semantics of uncertain data stream tuples, proposes an uncertain data query algorithm based on record vectors, and demonstrates the query process with examples. The algorithm arranges the tuples in descending order according to their scores, and the top k tuples with the highest probability values ​​are the Top-K query results. Experimental results show that the algorithm in this paper is more efficient and practical.

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