Journal of Xidian University ›› 2019, Vol. 46 ›› Issue (2): 145-151.doi: 10.19665/j.issn1001-2400.2019.02.024

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Extended belief rule base inference method based on the Hash index

LIU Wanling,XIAO Chengzhi,FU Yanggeng()   

  1. College of Mathematics and Computer Science, Fuzhou University, Fuzhou 350116, China
  • Received:2018-10-23 Online:2019-04-20 Published:2019-04-20
  • Contact: Yanggeng FU E-mail:ygfu@qq.com

Abstract:

Since the extended belief rule base needs to iterate by all the unordered rules in the inference process, it will result in a low efficiency of the belief rule base in system inference with a large number of rules. Therefore, this paper proposes to use the Locality Sensitive Hashing algorithm to index the confidence rule. First, Locality Sensitive Hashing is used to generate special locality sensitive hash value for all the rules in the Extended belief rule base and the hash value can keep the similarity between the original rules, so that similar rules have a greater probability of obtaining the same index value. Then, by processing the input data, we find the rules that are adjacent to the input data in the index table, and selectively activate these rules, thus improving the system’s inference efficiency. Finally, by choosing a nonlinear function fitting experiment and a simulation experiment on oil pipeline leak to the detection Extended belief rule base system based on the Locality Sensitive Hashing index, experimental results show that the Locality Sensitive Hashing algorithms can effectively optimize the Extended belief rule base system inference efficiency and improve the accuracy of the output results.

Key words: extended belief rule base, locality sensitive Hashing, index optimization, evidential reasoning

CLC Number: 

  • TP18