Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (3): 350-353.DOI: 10.12068/j.issn.1005-3026.2015.03.011

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Analysis of Accuracy of the Locating Information Source Method Based on Observers

ZHANG Yu-bo1, ZHANG Xi-zhe1,2, ZHANG Bin1,2   

  1. 1. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China; 2. Key Laboratory of Medical Image Computing, Ministry of Education, Northeastern University, Shenyang 110819, China.
  • Received:2014-01-27 Revised:2014-01-27 Online:2015-03-15 Published:2014-11-07
  • Contact: ZHANG Xi-zhe
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Abstract: The research on the relationship between the position of the observers and the location accuracy has significant importance for the source location methods based on the observers. The information diffusion process for a single source was investigated as the starting point, and theoretical spread delay and real spread delay were then analyzed. It is found that for a fixed source, if the difference of the shortest path among observers is increasing, the similarity of both types of delay is increasing. Then the relationship between the position of the observers and the location accuracy of the fixed diffusion source was analyzed, and it was concluded that: when the sum of distance difference from the information source to the observers increases, the location accuracy for the source becomes larger. The conclusion is validated by simulation experiments on model network data.

Key words: social network, information diffusion, information source location, observers deployment, location accuracy

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